THERMOCHIMICA ACTA
·
2023
·
IF 3.5
Wentao Hao,Qiannan Zheng,Xiang Zhang,Yuqing Li,Longzhen Qiu,Hongbo Lu,Wenping Wang,Wen Yang
For its biodegradability, renewability and sustainability, polylactic acid (PLA) fabrics are of great interests to replace the petroleum based, non-degradable textiles. However, their flame retardancy and water repellency need to be improved to be applied in household decoration, car interior, or protective clothing, etc. to make them safe and self-cleaning. Herein, PLA fabrics with improved flame retardancy and water repellency were produced by co-electrospinning PLA with DiDOPO, a derivative of 6H-dibenz(C,E)(1,2)oxaphosphorin-6-oxide (DOPO). The experimental results showed that the DiDOPO could have good protection for the PLA fabrics. More specifically, it had better protection to the fabrics than the bulk PLA during combustion. Furthermore, the PLA/DiDOPO electrospun fabrics showed improved water repellency compared to the pristine PLA fabric. It was found that the strength and toughness of PLA/DiDOPO electrospun fabrics were elevated too.
研究领域:
材料科学
·
纺织工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2022
·
IF 9.463
He Huang,Changqing Hong,Xiangyu Jin,Can Wu,Wei Wang,Hebing Wang,Yiwu Pan,Shiqi Wu,Xiaojie Yan,Wenbo Han,Xinghong Zhang
Aerogels still draw enormous interests of researchers to address the thermal insulating solutions due to environmental and energy challenges. To design and obtain lightweight organic aerogels with flexibility, thermal insulation, and hydrophobicity is one of the future directions. Herein, taking advantage of a 3D silicone framework as the backbone, a set of flexible phenolic aerogels with hierarchical architectures were fabricated by a facile one-pot and ambient pressure drying strategy. The intriguing microstructure afforded the aerogel composites multiple remarkble properties: highly-flexibility with high cyclic compressibility (70 % strain) and 1000 cycles of compression without collapse (40 % strain); excellent thermal insulating performace (insulate 126 °C at 200 °C with a thickness of 10 mm); instantaneous flame retardancy within 2 min; impressive hydrophobicity with high water contact angle of 148.5° and low sliding angle less than 6°. These integrited merits enable the composite aerogels to perform effectively in thermal management applications for long-term.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2019
·Vol. 11
·期 5
·786
·
IF 3.164
Xu Yan,Guo-Sai Liu,Jing Yang,Yi Pu,Shuo Chen,Hong-Wei He,Conger Wang,Yun-Ze Long,Shouxiang Jiang
Paper-based relics, which are an important part of cultural heritage worldwide, are at risk of imminent damage from various environmental sources. To protect them, the atmospheric pressure plasma polymerization of hexamethyldisiloxane (HMDSO) precursor has been explored on paper-based relics in situ. The macro and micro images taken during this process suggest that the in situ plasma treatment does not change the macro morphology and the micro structure of the treated paper-based relic samples. On the other hand, plasma treatment causes the polymerization of the HMDSO which then produces nanoparticles deposited onto the paper-based relics. These nanoparticles provide good waterproof properties with large static water contact angles and smaller rolling angles, which protect the paper-based relics from water penetration. Moreover, since the nanoparticles are deposited onto the fibers, waterproof fastness is ensured. Also, the examined mechanical properties of the treated and untreated paper-based relics indicate that the atmospheric pressure plasma treatment does not affect the strength of the paper very much. The results in this study show that atmospheric pressure plasma treatment with the use of HMDSO precursor is a good method to preserve paper-based relics.Keywords:plasma treatment;paper-based relics;waterproofing;preservation
研究领域:
文物保护
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2022
·Vol. 27
·期 13
·4177
·
IF 4.927
Yujian Zhang,Kuanjun Fang,Wei Wang,Haitao Niu
With the ever-growing concern about environmental conservation, green production and water-based nanofibers have attracted more and more interest from both academic and industrial fields; nevertheless, the stabilization process of water-based nanofibers is primarily relying on the application of organic solvent-based crosslinking agents. In this work, we develop a green approach to fabricate water-resistant polyvinyl alcohol (PVA) nanofibers by using a water-based epoxy compound, N1, N6-bis(oxiran-2-ylmethyl) hexane-1,6-diamine (EH), as the crosslinker. This EH/sodium carbonate/sodium bicarbonate (CBS) solution system can break down large aggregates of PVA molecules into small ones and promote the uniform distribution of EH in the solution, resulting in the improved stability of crosslinked PVA nanofibers. We firstly report that the uniform dispersion of crosslinking agents in the electrospinning solution plays a vital role in improving the stability of spinning solutions and the water resistance of crosslinked PVA nanofibers by comparing crosslinking performances between water-based epoxy and conventional water-based blocked isocyanate (BI). This work could open up a novel strategy and green approach for the stabilization of water-based nanofibers.Keywords:crosslinking;electrospinning;epoxy;polyvinyl alcohol;water resistance
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Xiaodong Lu,Xiaohui Wang,Xinyang Li,Liqin Chai,Guojin Liu,Jianping Ge,Jianzhong Shao
Patterned photonic crystals (PCs) have great application potential in the textile field owing to their attractive high-saturation iridescent effect. Herein, based on the idea of resist printing, a novel approach to constructing patterned photonic crystals via screen printing was designed and achieved. A colorless pattern with hydrophilic and hydrophobic difference was firstly prepared by screen printing using a hydrophilic polymer paste printed on a hydrophobic fabric, and then the PC structurally colored pattern was obtained through scrapping liquid photonic crystals (LPCs) on the fabric because the LPCs were spread and assembled in the hydrophilic pattern but resisted in the hydrophobic areas, so that to realize the rapid preparation of patterned PCs on the fabric surface. Once the contact angle difference (ΔCA) between the hydrophilic and hydrophobic areas exceeded 80, the “color paste” (that is, LPCs) did not stain the hydrophobic area at all after scrapping, and the assembled PCs pattern showed good contour sharpness and high-saturation iridescence effect. The complex multistructural color patterns on the fabrics were achieved by adjusting the size of nanospheres and using multistep printing and scrapping. The preparation of the protective layer on the PC surface effectively improved the structural stability of the patterned PCs while retaining the optical properties of the pattern. This patterned PCs preparation method was combined with a conventional responsive substance (rhodamine B) to obtain double anti-counterfeiting patterned PCs with the iridescence effect. The results suggested a promising future in both the highly efficient preparation of patterned PCs and the application of PCs in the anti-counterfeiting field.
研究领域:
材料科学
·
纺织工程
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
HOLZFORSCHUNG
·
2014
·Vol. 69
·期 3
·367-374
·
IF 2.339
Feng Liu,Zhengxin Gao,Deli Zang,Chengyu Wang,Jian Li
A three-step procedure has been developed for superhydrophobic coating on wood based on epoxy/silica materials in combination with hydrophobization. First, the epoxy resin is adhered to wood by immersing the samples into an epoxy resin acetone solution, then amino-functionalized silica particles are anchored by the epoxide groups, and finally, the created surface is modified by octadecyltrichlorosilane (OTS). The superhydrophobic surface not only is water repellent, as shown by the contact angle (CA) tests, but also decreases essentially the wood’s water absorption as determined by a 120-day water immersion test. The good mechanical stability of the coating was confirmed by a sand collision method.
研究领域:
材料科学
·
林业工程
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2023
·Vol. 15
·期 8
·1065-1071
·
IF 0.9
He Ke,Liu Yong,Wu Yanqi,He Yanting,Hu Qing,Wu Jia,Cui Guangxun,Zhang Jun,Jin Jun
Due to the special surface wettability, self-cleaning, drag reduction, anti-icing and other properties, superhydrophobic materials are widely used as coating or coating additive on the surface of building materials, ships, and even for liquid transportation, biomedicine, etc., which
have become one of the research hotspots in the direction of coating in recent years. However, the hydrophobic surface itself has weak stability and poor durability, which affects its application value. Therefore, in this study, PS nano-microcapsule was prepared by the multiphase emulsion
method, and their particle size was measured by SEM electron microscopy to be about 350–550 nm, with a relatively uniform distribution. The hydrophobicity of PS nano-microcapsule modified with trimethoxy (1H, 1H, 2H, 2H-trifluoroctyl) silane (PFOTMS) at different molar ratios was investigated.
SEM results showed that the surface roughness of the modified PFOTMS-PS nano-microcapsule could be changed. The contact angle proved that the greater the content of PFOTMS, the better the hydrophobicity of the modified PFOTMS-PS nano-microcapsule. When the content reached 50%, the hydrophobic
performance was the best. As a coating, PFOTMS-PS nano-microcapsule has no specific requirement for the properties of the substrate material. It should be noted that the hydrophobicity of the coating did not change significantly after 30 days at room temperature. The above results indicated
that PFOTMS-PS nano-microcapsule had good hydrophobicity and stability, and is expected to be used in many fields such as waterproof textiles and architectural coatings in the future.
研究领域:
材料科学
·
涂层技术
✓ 已验证
DOI
高影响因子
ACS Applied Electronic Materials
·
2022
·
IF 4.494
Xian Wu,Guijie Liang,Song Wang,Yin Wang,Haisheng Song,Zha Li,Ruosheng Zeng,Qingsong Hu
Copper(I) halides (Cu(I)Hs) have attracted extensive attention for their excellent luminescent properties. However, their poor water stability seriously hinders their application. So far, research on the performance improvement has been rarely reported. In this paper, a cuprous halide composite (Cu(I)HC) containing CsCu2Cl2I, CsCu2ClI2, and CuI phases was synthesized and presented. Under 285 nm ultraviolet light irradiation, CsCu2ClI2 in Cu(I)HC showed an abnormal photoluminescence for CsCu2X3 (X = Cl, Br, I), which generates a blue sky emission with the wavelength of 475 nm and the full width at half maximum of 99 nm, showing a typical self-trapped exciton emission. The Cu(I)HC can also give near white and violet emission following the excitation wavelength from 250 to 360 nm. It is exciting that the water stability of Cu(I)HC underwent a qualitative leap when it was coated with polysiloxane. Near white light emission Cu(I)HC polysiloxane luminescent ceramics (PSOLCs) were prepared for WLED exploration. Our method not only enhanced the water resistance of solvent-sensitive Cu(I)Hs, but also endowed them with the property of flexibility, which greatly expands their application fields. The prepared PSOLCs have potential applications in optical information encryption, lighting, and flexible photoelectron.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2024
·
IF 6.5
Huabin Hu,Jing Wang,Caiyun Li,Jun Xu,Lei Li
In extreme environments, thermal insulating materials must exhibit superior mechanical properties, be waterproof, and possess thermal stability to ensure optimal protection for both the human body and equipment. However, most existing thermal insulating materials suffer from limited thermal insulation performance, moisture absorption, inferior mechanical properties, and suboptimal thermal stability, thereby limiting their ability to protect against extreme conditions. In this study, the combination of electrospinning and freeze-drying technology was used to prepare polyimide aerogels with a rigid-flexible coupling structure. The prepared polyimide micro/nanofibrous aerogels demonstrated ultralight performance (6.5 mg cm −3 ), significant compression performance, and the ability to recover to their initial state under 80 % strain. After 1000 compression cycles at 60 % strain, only 7.2 % plastic deformation was observed, indicating excellent fatigue resistance. The synergistic effect of the rigid-flexible coupling endowed the aerogel with superior thermal insulation (26.9 mW m −1 K −1 ), and high-temperature resistance (441.8 °C). Furthermore, surface modification with water-repellent agents imbued the aerogels with enhanced hydrophobicity, making them suitable for use in extreme environments such as rainwater. This work offers new insights for the design and development of high-performance insulation materials in extreme conditions.
研究领域:
材料科学
·
极端环境工程
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2024
·
IF 16.8
Leqi Lei,Dong Wang,Yifan Si,Shuo Meng,Chuanwei Zhi,Jinlian Hu
The maintenance of a comparatively stable human body temperature through heating is essential for numerous physiological activities. However, the majority of the existing heating strategies are inefficient and wasteful in terms of energy usage, while also falling short in sufficiently protecting the human body against environmental hazards. Fabrics possessed the abilities to retain heat, repel water, and permit moisture to travel through are in high demand, which are essential for energy conservation and protective purposes. Herein, we introduce a highly efficient approach for producing electrospun membranes that exhibit excellent properties of heat confinement, water repellency, and moisture release properties, achieved by incorporating SiO 2 aerogel fillers into interconnected nanofibers. As a result, the obtained aerogel filler incorporation membrane (AFIM) composed of PVDF@SiO 2 exhibited a reduced thermal conductivity and reinforced moisture-release capability, leading to a 2 °C increase in temperature differential over its cotton counterpart and a water vapor transmission rate (WVTR) of 26.83 kg•m −2 day −1 . This work offers insights into the advancement of the thermoregulatory textiles to conserve energy and prevent waterlogging in future challenging conditions.
研究领域:
材料科学
·
纺织工程
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS & DESIGN
·
2021
·
IF 7.991
Dandan Li,Dinggen Hu,Jihuai Tan,Qinghao Zhu,Zhulan Liu,Chen Su,Jianbin Chen,Yunfeng Cao
Paper derived from lignocellulose has great advantages over plastics as packaging material, nevertheless, the poor water- and oil-resistances of paper-derived products limited their application in high-end field. Herein, novel dimer acid-based waterborne polyurethanes (DWPUs) with different content of dimer acid-based polyester polyol (DG) were prepared and used as water- and oil-resistant coating for paper substrate. The effects of DG contents on water- and oil-resistances, mechanical properties and thermal stability of DWPUs coated papers were systematically investigated. When the content of DG reached up to 7 wt% (based on polyester glycol), the paper coated by DWPU exhibited 88.06% decrease in Cobb 60 value, 8.7 times increase in kit rating compared with uncoated paper. Meanwhile, DWPUs coated papers showed good mechanical properties and thermal stability. These improvements are attributed to the flexible long-alkyl chain, and six-ring structure of DWPUs as well as the continuous and homogeneous DWPU-derived membrane on the surface of paper. This study provides a new framework for the preparation of high quality, multifunctional, environmentally friendly water- and oil-resistant coatings for paper substrates.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
Polymers
·
2018
·Vol. 10
·期 4
·441
·
IF 2.935
Weiqiu Wen,Jianwei Guo,Xi Zhao,Xiong Li,Hongmei Yang,Jem-Kun Chen
Considering the poor compatibility and water-resistance of sulfonate flame retardants for polycarbonate (PC), an efficient S/N-based flame retardant named 1,3,5,7-tetrakis(phenyl-4-sulfonyl-melamine)adamantane (ASN) has been developed. Fire properties studies of PC/ASN blends indicate that the addition of 0.10 wt % ASN imparts a V-0 rating and a limited oxygen index (LOI) value of 30.1% to PC specimens, and ASN can suppress the heat and toxic gas release of PC composites. Additionally, PC/ASN blends are believed to be exceptional materials for outdoor PC applications due to their superior water-resistance properties. Moreover, mechanical properties were further systematically investigated, and the correlative results indicate that the tensile strength and rigidity of specimens are improved with the addition of ASN.Keywords:flame retardant;adamantane;polycarbonate;fire properties;water-resistance
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）