Polyamide-imide reinforced polytetrafluoroethylene nanofiber membranes with enhanced mechanical properties and thermal stabilities

Yan, Feng; Xiong, Tianrou; Xu, Hongyao; Li, Chungen; Hou, Haoqing

doi:10.1016/j.matlet.2016.06.074

Cited by 25 publications

(12 citation statements)

References 15 publications

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“…It was observed that the weight loss at around 200°C for blended membranes with the higher percentage of modified polysulfone increased, and their residual ash percentage was lower than the neat one. Moreover, it is clear that the thermal stability of the hydrophilic membranes (blended membranes) decreased probably due to the entrance of the weaker aliphatic bonds in grafted polymers compare to the aromatic bonds in the pure polysulfone …”

Section: Resultsmentioning

confidence: 99%

Investigation of structure‐performance properties of a special type of polysulfone blended membranes

Mahmoudian

Kochameshki

Mahdavi

et al. 2018

Polymers for Advanced Techs

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Membranes require superior mechanical strength due to applied harsh conditions. The mechanical properties of membranes decrease with increasing hydrophilicity of its elements. In this study, mechanical properties were investigated for two special blended membranes which were made by blending polysulfone with (polysulfone-gpoly (n-butylacrylate) and polysulfone-g-poly (tert-butylacrylate) as components. All of the prepared membranes were characterized by differential scanning calorimeter, thermal gravimetric analysis, field emission scanning electron microscope, and atomic electron microscope and were investigated in terms of pure water flux, water contact angle, molecular weight cut off, and morphology. It was found that water contact angle decreased from 73.6°which belongs to neat membrane decreased to 46°for blended membranes containing higher amounts of copolymers; however, the pure water flux increased with increasing copolymer content considerably compared with the neat membrane. Also, molecular weight cut off increased aggressively. Furthermore, mechanical properties including tensile strength, Young modulus, and elongation at break were measured and compared with the neat polysulfone membrane.Results showed that the tensile strength and modulus decreased with an increase in the copolymers content, despite the increase in the elongation at break. The effect of applied pressure on the membrane structure and also bursting strength were studied, and it has been proved that not only the structure of the membranes but also their performance is strongly affected by the composition of the membranes.

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Section: Resultsmentioning

confidence: 99%

Investigation of structure‐performance properties of a special type of polysulfone blended membranes

Mahmoudian

Kochameshki

Mahdavi

et al. 2018

Polymers for Advanced Techs

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“…On the other hand, the water-soluble PAI resin belongs to a series of high molecular polymers with regular and alternating arrangement of imide rings and amide bonds. Thanks to the heat-resistant aromatic heteroimine groups and flexible amide groups, fiber made of PAI also shows excellent heat resistance, dielectric properties, mechanical properties and chemical stability [ 35 , 36 ]. In addition, the water solubility of PAI resin make it possible to prepare hybrid nanofiber accompanied with PTFE–PEO through electrospinning.…”

Section: Resultsmentioning

confidence: 99%

Preparation of PI/PTFE–PAI Composite Nanofiber Aerogels with Hierarchical Structure and High-Filtration Efficiency

Liu

Shen

et al. 2020

Nanomaterials

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Electrospun nanofiber, showing large specific area and high porosity, has attracted much attention across various fields, especially in the field of air filtration. The small diameter contributes to the construction of filters with high-filtration efficiency for fine particulate matter (PM), however, along with an increase in air resistance. Herein, composited nanofiber aerogels (NAs), a truly three-dimensional (3D) derivative of the densely compacted electrospun mat, were constructed with the blocks of polytetrafluoroethylene–polyamideimide (PTFE–PAI) composite nanofiber and polyimide (PI) nanofiber. PI/PTFE–PAI NAs with hierarchically porous architecture and excellent mechanical properties have been obtained by thermally induced crosslink bonding. Results indicated that sintering at 400 °C for 30 min could complete the decomposition of polyethylene (PEO) and imidization of polyamic acid (PAA) into PI, as well as generate sufficient mechanical bonding between adjacent nanofibers in the NAs without extra additive. The well-prepared PI/PTFE–PAI NAs could withstand high temperature up to 500 °C. In addition, the filtration tests illustrated that the composite NAs had an excellent performance in PM filtration. More importantly, the filtration behavior could be adjusted to meet the requirements of various applications. The excellent thermal stability and high-filtration efficiency indicated its great potential in the field of high-temperature air filtration.

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Section: Dispersion Electrospinningmentioning

confidence: 99%

“…179 The addition of polyamide-imide (PAI) further increased the tensile strength while diminishing elasticity. 180 Other important applications of PTFE fibers include triboelectric nano-generators, 181 as well as membranes for oil/water separation. 182 Alternatively, Kolesnik et al reported a procedure for ES aqueous dispersions of PTFE using PVA as water-soluble sacrificial matrix polymer.…”

Section: Suspension Electrospinningmentioning

confidence: 99%

Electrospinning based on benign solvents: current definitions, implications and strategies

et al. 2022

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Polyamide-imide reinforced polytetrafluoroethylene nanofiber membranes with enhanced mechanical properties and thermal stabilities

Cited by 25 publications

References 15 publications

Investigation of structure‐performance properties of a special type of polysulfone blended membranes

Investigation of structure‐performance properties of a special type of polysulfone blended membranes

Preparation of PI/PTFE–PAI Composite Nanofiber Aerogels with Hierarchical Structure and High-Filtration Efficiency

Electrospinning based on benign solvents: current definitions, implications and strategies

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