Thermal inter-fiber adhesion of the polyacrylonitrile/fluorinated polyurethane nanofibrous membranes with enhanced waterproof-breathable performance

Sheng, Junlu; Li, Yang; Wang, Xianfeng; Si, Yang; Yu, Jianyong

doi:10.1016/j.seppur.2015.11.046

Cited by 98 publications

(66 citation statements)

References 43 publications

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“…As can be seen in Fig. c, the hydrostatic pressure increased obviously from 4.3 to 5.45 kPa on increasing the temperatures, which was due to the decrease of d max (from 0.87 to 0.64 µm) . As depicted in Fig.…”

Section: Resultsmentioning

confidence: 62%

Preparation of electrospun polyurethane/hydrophobic silica gel nanofibrous membranes for waterproof and breathable application

Cao

et al. 2017

Polymer Engineering & Sci

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The polyurethane (PU)/hydrophobic silica gel (HSG) fibrous membranes with the hydrophobic and breathable surface was fabricated via electrospinning. By employing the HSG incorporation, mechanical properties, thermal stability, and waterproofness of the composite membranes could be improved. The porous structure of the membranes would be regulated by tuning the temperatures of thermal treatment. When HSG content increased to 3 wt%, the PU/HSG composite membranes possessed remarkable tensile strength of 6.3 MPa and high water contact angle (WCA) of 134°. Furthermore, the maximum WCA (142° ± 1°), good hydrostatic pressure (5.45 kPa), large water vapor transmission rate (8.05 kg/m2/day), and high air permeability (9.25 L/m2/s) of the composite membranes could be achieved by heat treatment at 120°C. The resultant membranes performed significantly better when compared to the pure PU membranes under the same conditions, such as the higher tensile strength (100%), better waterproofness (200%), and stronger breathablity (25%). POLYM. ENG. SCI., 58:1381–1390, 2018. © 2017 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 62%

Preparation of electrospun polyurethane/hydrophobic silica gel nanofibrous membranes for waterproof and breathable application

Cao

et al. 2017

Polymer Engineering & Sci

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“…This phenomenon is closely related to the higher degree of crystallinity and geometric arrangement among fibers such as adhesion at the contact areas among these fibers. While the plastic deformation of fibrous membrane is affected because of the inhibition of fiber slippage by the fusion and adhesion at contact areas among these fibers, which is responsible for the reduction of breaking elongation with the rising pressures and temperatures . Besides, the membranes for 180‐1, 160‐2, and 180‐2 exhibit relatively low tensile stress and breaking elongation owing to that the local melting of membranes sparks off loss of fibers and even membranes damage under the condition of high temperature and high pressure.…”

Section: Resultsmentioning

confidence: 99%

“…For instance, Wang et al prepared a waterborne fluorinated polyurethane modified electrospun polyacrylonitrile fibrous membrane, which possessed relatively high tensile strength (14.4 MPa), hydrostatic pressure (83.4 kPa), and WVTR (9.2 kg m −2 d −1 ). Sheng et al found that the thermal treated polyacrylonitrile/fluorinated polyurethane nanofibrous membranes with fiber‐fiber bonding structure exhibited the improved tensile strength (from 3.11 to 9.4 MPa), hydrostatic pressure (from 53 to 114.6 kPa) and WVTR (from 8.7 to 10.1 kg m −2 d −1 ) by adjusting heating temperature and time. In addition, the carbon nanotubes have been used as inspiring additive to enhance the tensile strength of electrospun composite fibrous membranes with a value of 12.5 MPa .…”

Section: Introductionmentioning

confidence: 99%

Improving waterproof/breathable performance of electrospun poly(vinylidene fluoride) fibrous membranes by thermo‐pressing

Lin

Bian

et al. 2017

J Polym Sci B Polym Phys

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Facing the ever-increasing demand for waterproof/ breathable materials, a rapid and efficient fabrication method of these functional materials with excellent performance as well as robust mechanical properties remains challenging. Herein, a simple and scalable strategy referred to as thermopressing is introduced to improve the waterproof/breathable performance and mechanical properties of electrospun PVDF fibrous membranes. The synergistic effect of temperature and pressure acted on the electrospun PVDF membranes on the fiber morphology and crystal structure was investigated, which can be able to effectively enhance waterproof performance and mechanical properties, endowing the as-prepared membranes with a modest breathability. The membranes thermo-pressed at 150 8C with a pressure of 8.27 MPa exhibit robust tensile strength of 40.65 MPa, which is superior to those of the previous reports (below 32.8 MPa). Notably, the optimized membranes enable to show a high hydrostatic pressure of 102 kPa, good WVTR of 10.87 kg m 22 d 21 and excellent abrasion resistance, which implies that the thermo-pressing is an efficient and facile way to steer the fiber morphology and crystal structure of electrospun membranes to improve their application performance.

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“…Plastic deformation is owing to inter-fiber slippage rather than plastic deformation in the nanofibrous structure themselves [29]. Some investigators are believed that strain-hardening is desirable for nanofibers for biomedical applications as it comes to resist an unexpected excess in a direction of human muscles [30][31][32][33].…”

Section: Resultsmentioning

confidence: 99%

Preparation and study of starch/ collagen/ polycaprolactone nanofiber scaffolds for bone tissue engineering using electrospinning technique

Ghavimi

Negahdari

Shahabadi

et al. 2020

Eurasian Chem. Commun.

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Bone tissue engineering has been a fast growing area recently. It suggests a novel and talented method for bone regeneration. The aim of the current work is to produce nanofiber scaffolds based on starch/ collagen/ polycaprolactone (PCL) biomaterials by means of an electrospinning methodology for bone tissue engineering purposes. The results showed that the developed structures have good physicochemical and interconnected properties that could be considered for bone tissues engineering. The results from the characterization specified that the nanofibers were successfully prepared with monodispersed nanosized diameter (60 nm), uniform network shaped morphology and negative surface charge (-13.5 mV). Besides, the applied method can be set up to prepare fiber-based structures using other polymeric materials. We believe that by incorporating different materials to reduce the degradation rate of the fibers, it can be matched with the speed of tissue regeneration. In this case, the prepared nanofibers can be used as the membrane biomaterials, for example, guided bone regeneration (GBR) membrane.

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Thermal inter-fiber adhesion of the polyacrylonitrile/fluorinated polyurethane nanofibrous membranes with enhanced waterproof-breathable performance

Cited by 98 publications

References 43 publications

Preparation of electrospun polyurethane/hydrophobic silica gel nanofibrous membranes for waterproof and breathable application

Preparation of electrospun polyurethane/hydrophobic silica gel nanofibrous membranes for waterproof and breathable application

Improving waterproof/breathable performance of electrospun poly(vinylidene fluoride) fibrous membranes by thermo‐pressing

Preparation and study of starch/ collagen/ polycaprolactone nanofiber scaffolds for bone tissue engineering using electrospinning technique

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