Waterproof, breathable and infrared-invisible polyurethane/silica nanofiber membranes for wearable textiles

Wang, Huijia; Fu, Yongjing; Liu, Rong; Xiong, Jie; Li, Ni

doi:10.1039/d2dt02325c

Cited by 10 publications

(4 citation statements)

References 32 publications

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“…In addition, the WLR of OW/APP/SiO 2 was 77.1%, slightly lower than that of OW/APP, and the WLR of FW/APP/SiO 2 was 43.7% lower than that of FW/APP, suggesting that PFA and nano‐SiO 2 had effectively improved the WLR by forming a denser cross‐linked network inside the wood. Besides, the introduction of nano‐SiO 2 could improve the water‐resistance of wood, a phenomena that is related to the low surface energy of nano‐SiO 2 26,65 …”

Section: Rerults and Discussionmentioning

confidence: 99%

“…Besides, the introduction of nano-SiO 2 could improve the water-resistance of wood, a phenomena that is related to the low surface energy of nano-SiO 2 . 26,65 The most likely explanation for the improvement of WLR with the addition of SiO 2 nanoparticles is that the cross-linked network formed by FA/APP/SiO 2 may affect the polymerization of FA in the wood, and it is proved that the synergistic effect of MA and SiO 2 highly promotes the polymerization of FA, showing a higher crosslink density. 40,41 Another is that FA resin might stop the nanoparticles from escaping from the micro-nano pores of the cell wall, preventing the water leaching from happening.…”

Section: Physical and Mechanical Performancementioning

confidence: 99%

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Dimensionally stable, flame‐retardant, and leach‐resistant furfurylated wood prepared by incorporating ammonium polyphosphate and nano‐silica

Shuqi

Hao

et al. 2023

Polymers for Advanced Techs

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Fast‐growing plantation typically has some undesirable inherent qualities that restrict their use as engineering materials, such as dimensional instability, poor mechanical strength, and flammability (Sangregorio et al., Green Chem, 2020, 22, 2786–2798; Zhang et al., Fire Saf J, 2021, 121, 103297). In this study, a simple and environmentally friendly method was applied to improve low‐quality poplar wood by building an organic–inorganic hybrid system with a combination of biomass‐derived furfuryl alcohol (FA), ammonium polyphosphate (APP), and nano‐silica (nano‐SiO2). Different amounts of APP and nano‐SiO2 were mixed with a FA water solution, impregnated into the poplar wood followed by curing at 103°C to induce in situ polymerization of furfurylated wood (FW). The results showed that the FW/APP/SiO2 had strong self‐extinguishing properties, and passed the UL‐94 V‐0 rating with a limiting oxygen index (LOI) value as high as 49.5%. Results from cone calorimetry and thermogravimetry suggested that APP and nano‐SiO2 could have a synergistic effect, which successfully inhibited heat transfer and suppressed the smoke emission during its combustion by promoting char formation. Scanning electron microscopy shows that FA, APP, and nano‐SiO2 can basically penetrate into the cell wall and modify the wood fundamentally. FW/APP/SiO2 also enhanced the phosphorus fixation in the wood and greatly reduced its leaching into water, indicating it has long‐term fire resistance in service.

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Section: Rerults and Discussionmentioning

confidence: 99%

Section: Physical and Mechanical Performancementioning

confidence: 99%

Dimensionally stable, flame‐retardant, and leach‐resistant furfurylated wood prepared by incorporating ammonium polyphosphate and nano‐silica

Shuqi

Hao

et al. 2023

Polymers for Advanced Techs

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“…FTIR spectroscopy was performed to confirm the interaction and cross-linking between the spectra at 550 and 3850 cm -1 . The spectrum of the SiO 2 powder (Figure 6a) showed a characteristic absorption peak at 3410 cm -1 , corresponding to the O H stretching vibrations of incomplete Si OH silanol groups (Wang et al, 2022a) . The characteristic absorption peaks of SiO 2 , observed at approximately 1103, 965, and 756 cm -1 , can be attributed to asymmetric and symmetric Si O Si strain vibrations and Si OH bending vibrations, respectively (Awadh and Yaseen, 2019;Ellerbrock et al, 2022).…”

Section: Ftir Analysismentioning

confidence: 99%

Preparation of PAN/PVDF Nanofiber Mats Loaded with Coconut Shell Activated Carbon and Silicon dioxide for Lithium-Ion Battery Anodes

Almafie,

Dani,

Riyanto

et al. 2024

Sci. Technol. Indones

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Utilizing carbon materials derived from natural biomass holds significant promise for battery applications, owing to their low cost, abundant availability, and environmentally sustainable characteristics. However, graphite anode materials do not meet the demands of efficient batteries. Coconut shell waste has the potential to be used as activated carbon in energy storage anodes. By adding silicon dioxide (SiO2) to maintain structural stability and electrochemical reaction kinetics, the advantages of CCS can be maximized. Polyacrylonitrile/polyvinylidene fluoride (PAN/PVDF) composite polymer was used as a matrix to embed CCS/SiO2 and synthesize nanofibers via electrospinning. The resulting nanofibers had diameters ranging from to 575–707 nm, with cross-linked, porous, and beadless characteristics. Mechanical properties were measured by single-fiber micro tensile tests. The young modulus, tensile strength, and toughness of each nanofiber were successfully maintained at 13.7 ± 0.4 MPa, 34.4 ± 0.1 MPa, and 982 ± 10 kJ/m3, respectively, because of the presence of a β-crystal growth layer that facilitated efficient stress transmission. The reduction-oxidation process response had a potential difference of less than 1.286 V in the first cycle, whereas for the third and fifth cycles, it was maintained below 3.416 V. The lithium-ion diffusion coefficient was below 4.73×1013 cm2/s. Using the anode directly, as in lithium-ion batteries, provided a high capacity of 382 mAh/g after 200 cycles. Good cycle stability, with over 98% retention of the initial capacitance after 200 charge/discharge cycles, underscores its potential for application in lithium-ion batteries.

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“…26 Yi et al 27 physically mixed silica nanoparticles (SiO 2 ) with a PAN solution and attached them to the surface of electrospun nanofibers by coaxial electrostatic spinning, resulting in PAN/SiO 2 -PU composite nanofibrous membranes with good waterproofing (Water Contact Angle is 152 ) and breathability properties (8.48 kgÁm À2 Ád À1 ). Wang et al 28 adopted a combination of electrostatic spinning and hydrothermal-assisted sol-gel to gradually achieve the grafting of SiO 2 by introducing different modifiers at various stages. The resulting PU/SiO 2 microporous membranes exhibited superhydrophobicity, with a remarkable water contact angle (WCA) of 161 .…”

Section: Introductionmentioning

confidence: 99%

Bionic lotus‐leaf‐structured fluorine‐free polyurethane by combining electrospinning and electro‐spraying for waterproof and breathable textiles

Zheng,

Li,

Chen

et al. 2024

J of Applied Polymer Sci

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Developing environmentally friendly and high‐performing viable waterproof and breathable membranes (WBMs) is critical but significantly challenging. Herein, we combine electrospinning and electro‐spraying methods. First, elastic thermoplastic polyurethane (TPU) is used as the polymer, and poly(methylhydrosiloxane) (PMHS) with low surface energy is introduced to prepare TPU/PMHS fiber‐based membranes by electrospinning. Electro‐spraying is performed using a dilute solution of TPU/PMHS/SiO2, with fluorine‐free hydrophobic SiO2 nanoparticles introduced to facilitate the construction of a rough lotus‐leaf‐like surface structure, ultimately obtaining TPU/PMHS/SiO2 WBMs with bead‐on‐string fiber binary structures and a strong water repellency. The results indicate that the TPU/PMHS/SiO2 WBMs comprise a three‐dimensional porous structure formed by randomly arranged fibers and a lotus biomimetic structure consisting of bead‐like fibers, providing the membrane with excellent mechanical properties and waterproof breathability, including a tensile strength of 15.8 MPa, static water pressure of 33 kPa, water vapor transmission rate of 5169 g m−2 d−1, and contact angle of 142°. Additionally, the fiber membrane exhibits an excellent strain recovery after 1000 cycles of cyclic stretching under 100% strain, verifying the excellent elastic properties of the TPU/PMHS/SiO2 WBMs. This simple preparation process and unique composite structure can facilitate the design and preparation of environmentally friendly, waterproof, and breathable materials.

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Waterproof, breathable and infrared-invisible polyurethane/silica nanofiber membranes for wearable textiles

Abstract: Currently, waterproof and breathable membranes, which have great potential in practical applications including membrane distillation, self-cleaning, and multifunctional clothing, have attracted a lot of attention due to their superior performance....

Cited by 10 publications

References 32 publications

Dimensionally stable, flame‐retardant, and leach‐resistant furfurylated wood prepared by incorporating ammonium polyphosphate and nano‐silica

Dimensionally stable, flame‐retardant, and leach‐resistant furfurylated wood prepared by incorporating ammonium polyphosphate and nano‐silica

Preparation of PAN/PVDF Nanofiber Mats Loaded with Coconut Shell Activated Carbon and Silicon dioxide for Lithium-Ion Battery Anodes

Bionic lotus‐leaf‐structured fluorine‐free polyurethane by combining electrospinning and electro‐spraying for waterproof and breathable textiles

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