Browsing by Author "Mishra, Rajesh"
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- ItemAcoustic, Mechanical and Thermal Properties of Green Composites Reinforced with Natural Fibers Waste(MDPI, 2020-03-01) Hassan, Tufail; Jamshaid, Hafsa; Mishra, Rajesh; Khan, Muhammad Qamar; Petrů, Michal; Novák, Jan; Chotěborský, Rostislav; Hromasová, MonikaThe use of acoustic panels is one of the most important methods for sound insulation in buildings. Moreover, it has become increasingly important to use green/natural origin materials in this area to reduce environmental impact. This study focuses on the investigation of acoustic, mechanical and thermal properties of natural fiber waste reinforced green epoxy composites. Three different types of fiber wastes were used, e.g., cotton, coconut and sugarcane with epoxy as the resin. Different fiber volume fractions, i.e., 10%, 15% and 20% for each fiber were used with a composite thickness of 3 mm. The sound absorption coefficient, impact strength, flexural strength, thermal conductivity, diffusivity, coefficient of thermal expansion and thermogravimetric properties of all samples were investigated. It has been found that by increasing the fiber content, the sound absorption coefficient also increases. The coconut fiber-based composites show a higher sound absorption coefficient than in the other fiber-reinforced composites. The impact and flexural strength of the cotton fiber-reinforced composite samples are higher than in other samples. The coefficient of thermal expansion of the cotton fiber-based composite is also higher than the other composites. Thermogravimetric analysis revealed that all the natural fiber-reinforced composites can sustain till 300 degrees C with a minor weight loss. The natural fiber-based composites can be used in building interiors, automotive body parts and household furniture. Such composite development is an ecofriendly approach to the acoustic world.
- ItemAn experimental evaluation of convective heat transfer in multi-layered fibrous materials composed by different middle layer structures(SAGE PUBLICATIONS INC, 2455 TELLER RD, THOUSAND OAKS, CA 91320 USA, 2019-10-01) Xiong, Xiaoman; Venkataraman, Mohanapriya; Jašíková, Darina; Yang, Tao; Mishra, Rajesh; Militký, Jiří; Petrů, MichalIn this work, three types of multi-layered fibrous materials with different middle layer structures, including Struto nonwoven, Struto nonwoven with air pockets and Struto nonwoven with air pockets filled by aerogel particles, were prepared based on laser engraving technique and laminating method. A custom-built new device was fabricated to evaluate convective thermal behaviour of the multi-layered materials in cross flow. It was found that in cross flow the heat transfer coefficient of the multi-layered material with encapsulated aerogels is directly proportional to Reynolds number. There are considerable variances in heat transfer rates of the three structures at low airflow velocity (less than 10 m/s), but the values are very close at high airflow velocity. It is concluded that the air pockets and aerogels present in the multi-layered fibrous material have significant effect on convective thermal behaviour of the overall structure in cross flow. The finding is a new contribution to the field of aerogel-based fibrous materials as thermal insulators in building and industrial facilities.
- ItemBasalt hybrid woven textile materials for advanced thermal applications(NATL INST SCIENCE COMMUNICATION-NISCAIR, DR K S KRISHNAN MARG, PUSA CAMPUS, NEW DELHI 110 012, INDIA, 2019-03-01) Jamshaid, Hafsa; Mishra, Rajesh; Militký, Jiří; Hussain, SajidThe thermal properties of hybrid basalt-polypropylene (B/PP), basalt-polyester (B/PET) and basalt-jute (B/J) as well as non-hybrid structures have been studied. The fabric structures have been developed as plain weave (PW) for B/PP, B/PET & B/J; matt weave (MW) for B/PP, B/PET & B/J; and 1/3 twill weave (TW) for basalt-PP, basalt-PET, and basalt-Jute along with the non-hybrid fabrics. The thermal properties of the fabrics, such as thermal conductivity and thermal resistance are studied along with the physiological behavior. Thermal properties are measured by Alambeta and TCi. Correlation between theoretical and experimental measurement of thermal conductivity are also studied. Air permeability is tested by air permeability tester. Based on the results, the influence of fabric structure on specific thermal insulation parameters are analyzed. The findings show that there is a significant impact on thermal properties of basalt hybrid woven structures by geometrical parameters of weave. Structure and fibre type have strong influence on thermal properties. Twill weave structures show higher air permeability and thermal resistance in all combinations.
- ItemBio-Composites Reinforced with Natural Fibers: Comparative Analysis of Thermal, Static and Dynamic-Mechanical Properties(KOREAN FIBER SOC, KOREA SCIENCE TECHNOLOGY CTR #501 635-4 YEOGSAM-DONG, KANGNAM-GU, SEOUL 135-703, SOUTH KOREA, 2020-03-01) Mishra, Rajesh; Wiener, Jakub; Militký, Jiří; Petrů, Michal; Tomková, Blanka; Novotná, JanaIn the present study, flax, jute and glass woven fabric samples were developed as reinforcement for composites with bio-epoxy resin. Flax fabrics were developed with plain weave, twill weave (different areal densities) and unidirectional (UD) structure. Jute fabrics were woven with three different structures i.e. plain, matt and twill respectively. For comparison purpose, glass woven fabric with plain weave and 3D orthogonal weave were used in this study. Static mechanical properties like flexural strength and impact resistance were studied. Dynamic mechanical properties were investigated by DMA 40XT RMI equipment.. Thermal conductivity has been studied for all composite samples. It is observed that the static mechanical properties of glass fabrics reinforced composites are superior but the flax & jute fabric reinforced composites are more flexible. The specific flexural strength as well as specific impact strength of the flax & jute fabric reinforced composites are competitive. The dynamic mechanical properties are comparable to that of glass fabric reinforced composites. They can be used in relatively lower load bearing applications as they are a sustainable source of materials for bio-composites which reduce the environmental burden and reduce the manufacturing cost.
- ItemCharacteristics of Woven Basalt and Hybrid Structures as Composite Reinforcement(TEXTILE BIOENGINEERING & INFORMATICS SOCIETY LTD, TBIS 2010 SECRETARIAT MN104, HONG KONG POLYTECHNIC UNIV, HONG KONG SAR, 0000, PEOPLES R CHINA, 2018-01-01) Jamshaid, Hafsa; Mishra, Rajesh; Militký, JiříIn this study, experimental investigations are carried out to check the thermal and mechanical behavior of woven Basalt/PET and Basalt/PP fiber hybrid woven fabric epoxy composite laminates. Fabricated composite samples are subjected to mechanical and thermal characterization. Results are discussed in terms of fiber effect, weave geometry and the resin effect. The results reveal that the hybridization of basalt in different weaves leads to significant improvement in the mechanical properties of composites. The modulus is significantly increased in composites due to interfacial bonds between fibers and resin. Thermal behavior of fiber and composite was observed by Thermal Gravimetric Analysis. Thermal properties are also affected by hybridization. Thermal conductivity is strongly affected by resin properties. Fractography studies of the damaged surface are also demonstrated.
- ItemCharacterization of optical fiber after surface modification(Technická Univerzita v Liberci, 2012-01-01) Shukla, Anuj; Mishra, RajeshOptical fibers have been used principally for data transmission, since it offers fast connectivity, low cost, and high resistance to damage. The purpose of this research was not to evaluate the data capabilities of plastic optical fibers (POF) which transmits axially, but rather to exploit the ability of the fiber emit light through the side of the fiber. The uses of side emitting fibers in textile would prove to beneficial in several ways, few of them being the flexibility of the fiber for integration into fabrics, and possibly to mask this fiber like all others, with the aid of classical textile dyeing methods. The POF, with trade name Flexi was used in this case, because of its flexibility, and variation in diameters available on the market. Flexi cores were stripped from its cladding, and were dyed using a disperse dye, under various conditions including changing in dye concentration and dye time. Samples were then analysed for side emission of light with the use of Prototype 1, which was an instrument specifically designed for the measurement of this nature. The results showed that the dye penetration is dependent on the dye time, if dye concentration and temperature are kept constant. After 40minutes of dyeing, the fiber core showed an increase in side emission, with lower loss due to attenuation. Also excessive time in the hot conditions degraded the fiber, such that the fiber became very stiff and brittle. Fibers were also subjected to heat, in the form of boiling water bath, for selected periods of time, and it was found that the effect was similar to that of the prior experiments. Surface treatment of Flexi fibers were carried out using ethyl acetate as an etching agent, to possibly accept more disperse dye on the fibers surface. The results after dyeing showed a more than significant improvement in both side emission and attenuation of light. The influence of the illuminating source of the fiber also proved to be important, such that the side emission is dependent on the temperature of light from the source.
- ItemCharacterization of woven fabric composites(Technická Univerzita v Liberci, 2012-01-01) Mavuso, Ayanda Faith; Mishra, RajeshComposites have gained so much attention in most kinds of industries. They are greatly appreciated for their low weight and density compared to metals. These materials have not been fully adopted due to lack of knowledge of their capabilities. As a result interest in studying their properties is everywhere. The major problem with these materials is that as much as they have appreciable properties, these properties cannot be entirely predicted. Many conditions during their production affect the final properties. These production conditions may include choosing the appropriate matrix, curing temperature and ensuring even distribution of the matrix throughout the reinforcement. Within the composites themselves, woven fabric composites have gained more interest due to their ease to handle during production as compared to their unidirectional composite counterparts. Woven fabrics have the advantage of having the yarns interlaced and tight, thus making them easy to handle. One most important thing though is to ensure that an appropriate resin is chosen for any particular reinforcement. To enhance their properties, filler materials which contribute their effect to a micro and/or Nano scale are also being greatly investigated, so as to find out the properties they enhance and those they depreciate. Fillers enhance in increasing the volume of the matrix, since some of them like fly ash are far cheaper than polymers. Their addition is however crucial since their reaction with the matrix may also lead to undesired results. In this study, interest has been given to effects caused by fly ash particles to some properties of woven glass/epoxy composites. The properties studied include; flexural strength, stab resistance, electrical resistance, dynamic mechanical analysis, EMI shielding efficiency and UV-transmission. Results did show that whilst the addition of filler improves some properties, some properties are depreciated. As a result, the amount of filler and the type of filler to be added entirely depends on the final application of the composite. This means that before any composite material is produced, its intended application must be well understood so as to know which properties are of importance and which can be compromised. Fly ash is one of the cheap filler materials because it is readily produced by burning coal in thermal industries. It has very low density with some elements that make them enhance performance of composites.
- ItemCompression resilience and impact resistance of fiber-reinforced sandwich composites(2019-01-01) Mishra, Rajesh; Wiener, Jakub; Militký, Jiří; Petrů, Michal; Tomková, Blanka; Novotná, JanaThis paper presents an experimental investigation on the compression behavior of fiber-reinforced sandwich composites. In this study, five different types of sandwich composites were prepared with warp knitted spacer fabric as middle layer. Four different types of woven Kevlar fabric structures were used as outer layers (skin) along with one sample of woven basalt fabric. The middle layer used is 100% polyester spacer fabric. Sandwich composites were fabricated using epoxy resin by wet lay-up method under vacuum bagging technique. Compression behavior, ball burst, and knife penetration were tested for all samples. The effect of outer layer of these composites on the mechanical performance was studied using the compression stress-strain curves. It is known that spacers have excellent compression elasticity and cushioning. Maximum knife penetration resistance is obtained with twill weave on surface because of maximum yarn cohesion and resin impregnation. Higher amount of cohesive friction results in higher resistance against penetration of sharp objects like the knife edge. Plain and twill fabrics offer sufficient resistance again ball burst. The yarn deformation allows formation of dome shape after ball impact. Maximum impact resistance in ball burst is obtained for plain weave because of highest level of interyarn binding. The results provide new understanding of knitted spacer fabric-based sandwich composites under compression and impact loading condition.
- ItemEffect of silanization on copper coated milife fabric with improved EMI shielding effectiveness(Elsevier Ltd, 2020-01-01) Periyasamy, Aravin Prince; Yang, Kai; Xiong, Xiaoman; Venkataraman, Mohanapriya; Militký, Jiří; Mishra, Rajesh; Křemenáková, DanaElectromagnetic interference takes place due to the increase in complexity of electronic devices/systems in the form of higher packing density for quick response. To overcome its adverse effects, the effective shielding of components is needed abundantly. This leads to an increase of undesirable influence of electromagnetic signals and troublesome charges against which protection of human beings is required. Textile based structure with electromagnetic shielding ability has promising replacement of conventional materials due to its flexibility, air permeability and comfort properties. In this work, a copper coated fabric was silanized with different types of silane to stabilize the copper deposition on the fabric. Three different silanes were used for the silanization treatment to stabilize the copper deposition. The results showed excellent electromagnetic shielding properties. In addition to that, electrical and physical properties of the fabrics were evaluated before and after silanization treatment.
- ItemAn experimental investigation into the mechanical behavior of 3d woven hybrid composites(Technická univerzita v Liberci, Česká republika, 2013-01-01) Mishra, Rajesh; Dash, B. P.; Behera, B. K.Obecně platí, že cílem hybridizace je dosáhnout kompozitní struktury, která posílí vlastnosti obou materiálů a / nebo sníží náklady, protože jeden typ vlákna může být příliš drahý. V této studii je popsána 3D tkanina sklo/aramid/epoxid hybridního kompozitu vyrobená z Kevlaru a Zylonu ve směru Z, a skla v obou směrech X a Y. Byly zkoumány mechanické vlastnosti, jako je pevnost v tahu, tlaku, tříbodý ohyb, odolnost proti nárazu, odolnost proti propíchnutí a DMA. 3D hybridní kompozity ve srovnání s kompozitem FVF jasně ukazují lepší odolnost proti nárazu, odolnost proti probodnutí a vlastnosti DMA.
- ItemFunkční vlastnosti nanokompozitních materiálů(Technická Univerzita v Liberci, 2014-01-01) Antoš, Vlastimil; Mishra, RajeshDiplomová práce byla zaměřena na funkční vlastnosti tenkých nanokompozitních fólií z PLA matrice a výplně z jutových nanovláken. Cílem pokusů bylo ověřit vliv různého obsahu nanovláken na tepelné, elektrické a elektromagnetické vlastnosti. Také byl zkoumán vliv chemické úpravy jutových nanovláken na výsledné vlastnosti materiálu. Práce je rozdělena do dvou samostatných částí. V teoretické části je popsáno základní rozdělení kompozitů, vliv matrice a výplně na výsledné vlastnosti kompozitu. Jsou zde popsány některé druhy používaných výplní nanokompozitů(skleněná, uhlíková, přírodní vlákna). Také je zde popsána výroba PLA a použití PLA nanokompozitních fólií. Vlastnosti materiálů a způsoby charakteristiky jako DMA a DSC. V praktické části je popsáno testování a ověřování vlastností tenkých nanokompozitních PLA fólií s jutovými nanovlákny. Nejprve je zde popsáno chemické ošetření jutových vláken. Poté příprava jutových nanovláken pomocí vysoko energetického planetového mlýna. Samotná příprava fólií a testování tepelných elektrických a elektromagnetických vlastností.
- ItemIn-plane shear behavior of 3D spacer knitted fabrics(SAGE Publications Ltd, 2016-01-01) Arumugam, Veerakumar; Mishra, Rajesh; Militký, Jiří; Tunák, MarošThe shear behavior of 3D spacer knitted fabrics was investigated by using a picture frame fixture. Three different methods were used to find the shear angle during loading rate of 10 mm/min. All the tests were recorded by a CCD monochrome camera. The images acquired during loading process were used for analysis in order to obtain the full-field displacement and shear angles at chosen points on the surface of test specimen. An experimental and analytical investigation of picture frame shear fixture was conducted to determine its suitability for measuring intra-ply shear properties of 3D knitted spacer fabrics. In this work, a fixture was designed to analyze the in-plane shear behavior of these fabrics. The nonlinear behavior of shear force versus shear angle and the deformation mechanism were analyzed. The curves for shear force versus shear angle and position of buckling for in-plane shear test are recorded by considering two different frame lengths in order to compare with each other. Load–displacement curves of intra-ply shear tests are also analyzed. In addition to this, a program was developed in MATLAB using Hough transform to analyze the shear angle in the real-time image taken during displacement of specimen at various positions. The results of image analysis were compared with the actual experimental results. These findings are important requirements for further improvements in designing of picture frame fixture and to study the in-plane shear properties of 3D fabrics. © 2015, © The Author(s) 2015.
- ItemInfluence of EMI Shielding on Silane-coated Conductive Fabric(TEXTILE BIOENGINEERING & INFORMATICS SOCIETY LTD, TBIS 2010 SECRETARIAT MN104, HONG KONG POLYTECHNIC UNIV, HONG KONG SAR, 0000, PEOPLES R CHINA, 2019-01-01) Periyasamy, Aravin Prince; Yang, Kai; Xiong, Xiaoman; Venkatraman, Mohanapriya; Militký, Jiří; Mishra, Rajesh; Křemenáková, DanaElectromagnetic interference (EMI) takes place due to an increase in the complexity of electronic devices/systems in the form of higher packing density for a quick response. To overcome its adverse effects, the effective shielding of components is abundantly needed. This leads to an increase in the undesirable influence of electromagnetic signals and troublesome charges against which the protection of human beings is required. A textile-based structure with electromagnetic shielding ability is a promising replacement for conventional materials due to its flexibility, air permeability and comfort properties. In this work, a Cu-coated fabric was silanized with different types of silane to stabilize the Cu deposition fabric. Three different silanes were used in the silanization treatment in order to stabilize the Cu deposition. The results showed improved electromagnetic shielding properties.
- ItemInvestigation on sound absorption properties of aerogel/polymer nonwovens(2019-02-01) Yang, Tao; Xiong, Xiaoman; Venkataraman, Mohanapriya; Mishra, Rajesh; Novák, Jan; Militký, JiříThis paper presents an investigation on sound absorption performance of aerogel/polymer nonwoven fabrics. Polyester/polyethylene nonwovens embedded with hydrophobic amorphous silica aerogel were chosen for sound absorption measurements. The sound absorption coefficient (SAC) of single and laminated layers of aerogel nonwovens blankets was tested by Bruel and Kj AE r impedance tube, the noise reduction coefficient (NRC) was used for numerical analysis. A sound absorption index was developed to analyze the effect of aerogel content on sound absorption ability. The effect of air-back cavities on SAC of single-layer aerogel/polymer nonwoven fabrics was investigated. The results show that there is a decrease in SAC with the increase of aerogel content. It is observed that the NRC linearly increased with the increase of layers for all the samples. It was also found that the air-back cavities result in resonance phenomenon, as the increase in thickness of air-back cavities the peak values of SAC shift toward lower frequencies.
- ItemInvestigation on thermo-physiological and compression characteristics of weft-knitted 3D spacer fabrics(Taylor and Francis Ltd., 2016-01-01) Arumugam, Veerakumar; Mishra, Rajesh; Militký, Jiří; Salačová, JanaThe thermo-physiological comfort and compression properties of knitted spacer fabrics have been evaluated by varying the different spacer fabric parameters. Air permeability and water vapor transmission of the fabrics were measured using the Textest FX-3300 air permeability tester and PERMETEST. Thermal behavior of fabrics was evaluated by (TCi) thermal conductivity analyzer and overall moisture management capacity was evaluated by moisture management tester. Spacer fabrics compression properties were also tested using KES-FB3. In the KES testing, the compression resilience, work of compression, linearity of compression, and other parameters were calculated from the pressure–thickness curves. Analysis of variance was performed using new statistical software named QC expert trylobite and Darwin in order to compare the influence of different fabric parameters on thermo-physiological and compression behavior of samples. This study established that the raw materials, type of spacer yarn, density, thickness, and tightness of surface layer have significant influence on both thermal conductivity and work of compression in spacer fabrics. The parameter which mainly influences the water vapor permeability of these fabrics is the property of raw material i.e. the wetting and wicking properties of fibers. The Pearson correlation between moisture capacity of the fabrics and water vapor permeability was found. © 2016 The Textile Institute
- ItemModeling of 2D and 3D woven fabric structure and properties(2013-01-01) Mishra, RajeshHlavním cílem práce je design, projekce a konstrukce 2D i 3D tkaných struktur a technické použití. Geometrický model textilie poskytuje určitý zjednodušený vzorec pro usnadnění výpočtů a specifické konstanty, které jsou důležité pro textilní inženýrství, problémy struktury a mechanických vlastností. Tyto tkaniny parametry jsou násrojem pro inovativní návrháře tkanin pro různé použití. Modelovací techniky jsou popsány pro struktury tkanin. The main focus of habilitation work is design and development of 2D as well as 3D woven structures for clothing and technical applications. The geometrical model of fabric provides some simplified formulae to facilitate calculations and specific constants which are of value for textile engineering, problems of structure and mechanical properties. These fabric parameters are tool for an fabric designer in creating fabrics for diverse applications. Modeling techniques are discussed for woven structures.
- ItemNoise attenuation performance of warp knitted spacer fabrics(SAGE PUBLICATIONS LTD, 1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLAND, 2019-02-01) Arumugam, Veerakumar; Mishra, Rajesh; Militký, Jíří; Tomková, BlankaThe development of functional textile structures is important to improve noise attenuation of human life in automotives, residential and occupational environments. In this research, an attempt has been made to find the suitability of three-dimensional (3D) knitted spacer fabrics for sound absorption. Hence, an experimental and analytical investigation on the sound absorption behavior of warp knitted spacer fabrics was conducted. Due to their porous nature, interconnected pores, bulkier and 3D structure, the spacer fabrics have the ability to attenuate more sound energy than conventional materials. This research examined the acoustic properties of spacer fabrics in relation to material parameters such as thickness, density and surface structure and structural characteristics such as massivity, porosity, tortuosity and air flow resistivity. The sound absorption coefficient of the test samples was measured using the impedance tube method by ASTM E-1050 in the frequency range of 50-6400 Hz. The results showed that the acoustic insulation of spacer fabric improves with their thickness and massivity, reduction in their porosity, tortuous path and high air flow resistance. Advance statistical evaluation and two-way analysis of variance is used to analyze the significance of the combined effect of various factors on air flow resistivity and the noise reduction coefficient. These findings are important requirements for the design of spacer fabrics for noise control in the automobile upholstery, buildings, auditoriums, etc.
- ItemNumerical Modelling of the Acoustic Properties of Polyester Non-woven(TEXTILE BIOENGINEERING & INFORMATICS SOCIETY LTD, TBIS 2010 SECRETARIAT MN104, HONG KONG POLYTECHNIC UNIV, HONG KONG SAR, 0000, PEOPLES R CHINA, 2019-01-01) Yang, Tao; Saati, Ferina; Xiong, Xiao-Man; Wang, Yuan-Feng; Yang, Kai; Mishra, Rajesh; Militký, Jiří; Petrů, MichalThis paper investigates the acoustical properties of polyester non-woven by using practical and numerical methods. Several types of non-woven samples made from staple, hollow and bi-component polyester fibres were chosen to carry out this study. The AFD300 Acoustic Flow device was used to measure airflow resistivity. The 45 mm Materiacustica two-microphone impedance tube was used to measure the surface impedance and sound absorption coefficient. Widely used impedance models, such as the Delany-Bazley, Miki, Garai-Pompoli and Komatsu models, were applied to predict acoustical properties. A comparison between measured and predicted values has been performed to derive the most accurate model. The Johnson-Champoux-Allard-Lafarge (JCAL) model was applied to obtain some non-acoustical properties based on the inverse method. It is found that the Delany-Bazley and Miki models can accurately predict the surface impedance of polyester non-woven. The results indicate that the Miki model is the most acceptable method for predicting the sound absorption coefficient, with an 8.39% mean error for all of the samples. The values are 8.92%, 12.58% and 69.67% for the Delany-Bazley, Garai-Pompoli and Komatsu models, respectively. Several difficult-to-obtain parameters have been investigated.
- ItemPokročilé materiály pro bariérové a funkční vlákenné systémy(2013-01-01) Křemenáková, Dana; Militký, Jiří; Mishra, Rajesh
- ItemPREPARATION OF ELECTROSPRAYED MICROPOROUS MEMBRANES(IOP PUBLISHING LTD, DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND, 2018-01-01) Venkataraman, Mohanapriya; Mishra, Rajesh; Yang, Kai; Militký, Jiří; Křemenáková, Dana; Zhu, Guocheng; Yao, JumingPolytetrafluoroethylene (PTFE) which is also called as "TEFLON" is a synthetic fluoropolymer of tetrafluoroethylene that has wide applications due to its differentiating properties. In this study, different PTFE dispersions for preparation of polytetrafluoroethylene mesoporous active membranes doped by basalt and carbon particles which were created in high voltage electrostatic field has been studied. The adjusting of process parameters of common electrospinning system (Nanospider) for preparation of membranes with tunable porosity created by nanofibrous assembly (electrospinning) and interconnected particles (electrospraying) has also been investigated. The nanoparticles based on milled basalt and carbon was used for activation and achieving of special effects. Superhydrophobic Polytetrafluoroethylene (PTFE) microporous membranes with different surface structures were obtained by controlling operating parameters in the electrospinning process. The diameters and microstructure of the PTFE microporous membrane were characterized by scanning electron microscopy. The contact angles on the microporous membranes were evaluated by static micro-drop observation, and a modified Yang equation was applied to analyze the contact angles. The superhydrophobic PTFE microporous membranes were also tested for thermal properties. As a result of this study, optimized PTFE blend solutions were identified. The results also revealed that the specific surface area was the key factor affecting the contact angles. The thermal properties revealed that thermal conductivity was higher and thermal resistance was lower for carbon and basalt doped membranes.