CARBOHYDRATE POLYMERS
·
2018
·
IF 5.158
Rui Hu,Bingxue Huang,Zhouhang Xue,Qingye Li,Tian Xia,Wei Zhang,Canhui Lu,Huagang Xu
Three-dimensional (3D) printing parts with excellent resolution and high performance are of great significance for scientific and engineering applications. In this study, a novel photocurable cellulose acetate butyrate (PC-CAB) resin was synthesized for continuous liquid interface production (CLIP) to construct 3D objects with high resolution, tailored mechanical properties, excellent chemical resistance and thermal stability. Particularly, the tensile and flexural strength of the CLIP 3D printed specimen could reach 44.67 and 64.53 MPa, respectively. Their solvent resistance against various organic solvents and strong acidic/basic solutions was evaluated. As expected, the 3D prints could well maintain their structural integrity and exhibited very low swelling ratios owing to the photo-induced chemical crosslinking structure. Notably, even after immersion in methylene chloride or 1.0 M acid/alkali for 3 h, the 3D prints still showed excellent mechanical and thermal properties. Further study demonstrated that when PC-CAB in the CLIP ink was optimized to 20 wt% while the photoinitiator (PI) was 0.5 wt%, complex-structured 3D printed objects with high surface quality could be obtained under specific printing parameters.
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
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 46
·32030-32044
·
IF 10.7
Xue Bi,Kunpeng Song,Qianlong Li,Tao Lin,Ye-Tang Pan,Wei Wang,Jiyu He,Rongjie Yang
In recent years, there have been few reports on the application of zeolites in the field of flame retardants, although their excellent thermal stability indicates great potential as flame retardants. However, a key challenge that needs to be solved urgently is the compatibility between molecular sieves as inorganic fillers and polymer matrices, which directly affects their performance and stability in practical applications. In this work, ZSM-5 zeolite was used as the carrier, Ce ions were introduced through ion exchange, and the growth of Ce-MOF was restricted on its surface, and a Ce-MOF@ZSM-5 hybrid material was designed to improve the flame retardant and ultraviolet resistance properties of thermoplastic polyurethane elastomer (TPU). The absorbance value of TPU composites in the whole region is significantly higher than that of pure TPU, and its absorbance reaches 1.33. Compared with pure TPU, the peak heat release rate and peak smoke production rate of TPU/Ce-MOF@ZSM-5 composites were reduced by 26.0% and 34.8%, respectively. In addition, the chemical resistance of TPU composites has been significantly improved. This work provides the possibility of preparing three-proofing TPU materials with UV resistance, chemical resistance and fire resistance, and is expected to expand the application of TPU materials in other fields.
研究领域:
材料科学
·
高分子化学
·
阻燃材料研究
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 136
·期 37
·47957
·
IF 2.188
Jingtao Dai,Zhijun Wu,Liuyang Tang,Jinqing Qu
Cyclic carbonates reacted with diamines or polyamines have been proposed as a greener and safer method to prepare free isocyanate polyurethane coatings. Here, five kinds of bis(cyclic carbonate)s (TDC: toluene bis(cyclic carbonate), MDC: 4,4′-diphenylmethane bis(cyclic carbonate), IPDC: isophorone bis(cyclic carbonate), HMDC: 4,4′-methylenebis(cyclohexyl cyclic carbonate), HDC: hexamethylene bis(cyclic carbonate)) were prepared by reacting glycerol carbonate with diisocyanate under atmospheric pressure. Their structures were verified by 1 H-NMR and 13 C-NMR. These difunctional cyclic carbonates were then reacted with several amines to prepare new polyhydroxyurethane (PHU) coatings, and the film properties were tested. It was found that PHUs based on aromatic and alicyclic structures including TDC, MDC, IPDC, and HMDC displayed high hardness but had poor flexibility and impact resistance, whereas PHUs based on aliphatic structures such as HDC exhibited good flexibility and impact resistance and low hardness. When the length of the alkyl groups in the amine curing agents increased, the impact resistance and flexibility of the PHUs increased, but their pencil hardness decreased. PHUs from TDC, MDC, and IPDC had excellent chemical resistance, but the PHUs from HMDC and HDC had less chemical resistance. Some films displayed excellent properties including 4H pencil hardness, 100 cm kg impact resistance, and excellent flexibility. Some PHUs exhibited good thermal stability, with T 5% values all above 242°C. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47957.
研究领域:
材料科学
·
有机化学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2018
·
IF 0
Ru Yan,Yangyang Liu,Baijun Liu,Yumei Zhang,Qi Zhao,Zhaoyan Sun,Wei Hu,Niaona Zhang
Organosolv lignin (OL) was used to synthesize organosolv-lignin-based epoxy acrylate (OLBEA) coatings. The reaction process was determined by epoxy and acid values. OLBEA coatings were prepared by dual (Ultraviolet (UV) and thermal) curing to achieve a deep and complete process. The structures of lignin-based epoxy (OLBE) and OLBEA were characterized by Fourier transform infrared spectroscopy (FTIR). The properties of the dual- and UV-cured coatings were then compared by measuring gel content and mechanical properties . Results revealed that the dual-cured films had higher cross-linking degree and better mechanical properties than the UV-cured films. The chemical resistance of the dual-cured coatings was also examined. The properties of OLBEA coatings obtained by dual curing were shown to be excellent and promising for wide-ranging applications.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PROGRESS IN ORGANIC COATINGS
·
2022
·
IF 6.206
Mingjin Zhu,Shuangyang Li,Qingyong Sun,Bi Shi
The incorporation of graphene oxide (GO) into waterborne polyurethane (WPU) coating shows great potential in enhancing the performance of WPU coating. But homogeneous dispersion of GO in polymer matrix is still a challenge for the application of GO. In this paper, the polyacrylic acid modified graphene oxide (PAA-nGO) with high dispersion stability in a wide range of pH (4–11) was prepared via two step amidation reaction. Significantly, PAA-nGO can be uniformly dispersed in WPU as bifunctional additive to prepare WPU/PAA-nGO coatings with enhanced mechanical property, chemical resistance and abrasion durability. The as-prepared WPU/PAA-nGO coating exhibited improved tensile strength (18.12 MPa) and tear strength (38.07 kN/m), which were 56.1% and 51.5% higher than those of pure WPU coating, respectively. Interestingly, WPU/PAA-nGO coating showed improved chemical resistance. Notably, abrasion durability of WPU/PAA-nGO coating was significantly enhanced, and the mass loss rate was decreased by 77.1%. Overall, this work provided a potential strategy for improving the mechanical property, chemical resistance and abrasion durability of WPU based coatings by introducing PAA-nGO with well dispersion and high stable in a wide pH range.
研究领域:
材料科学
·
高分子化学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Qian Geng,Yi Pu,Yajian Li,Xue Yang,Huizhi Wu,Senjie Dong,Ding Yuan,Xin Ning
Currently, industrial waste gas and oily wastewater are usually at high temperature and contain corrosive components (e.g., acid, alkali, oxidant, or high salt, etc.), presenting great challenges on filtration/separation materials. Here, a multi-purpose Poly( m -phenylene isophthalamide)/polyacrylonitrile/silica (PMIA/PAN/SiO 2 ) nanofiber composite membrane with a high yield was prepared simply via electrospinning to satisfy the demands of air filtration and oil/water separation in complex environments. Under the synergy of PMIA, PAN and SiO 2 , the composite membrane possesses high PM 0.3 removal capacity of 99.69%, robust purification ability against real smoke PM 2.5 , effective oil/water separation performance of > 99.6%, superior high temperature stability (about 250 °C) and excellent chemical resistance, showing the potential application in filtration/separation process under complex conditions. Moreover, the influence mechanism of SiO 2 NPs on mechanical properties and filtration performance was systematically investigated through experiments and simulations, paving the way for future intensive research. This study provides an option for the facile and effective preparation of high-performance filtration/separation membranes applied in the field of dust filtration and oily wastewater separation, even in harsh environments.
研究领域:
材料科学
·
环境工程
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Wei-long Zhou,Ting Wu,Yu Du,Xiao-hu Zhang,Xin-chang Chen,Jin-bo Li,Heng Xie,Jin-ping Qu
Obtaining fresh water from the atmosphere by fog collectors is a promising way to meet the challenge of the water crisis. Bioinspired fog collectors have attracted widespread attention, but their application is limited by complex preparation processes and weak environmental adaptability. Herein, an efficient method that combines extrusion compression molding and surface modification is proposed for the large-scale fabrication of united superhydrophobic-hydrophilic polypropylene/graphene nanosheets (UPP/GNS) films for quantitative fog harvesting. Specifically, the desert beetle-inspired micro-pillars on the UPP/GNS surface exhibit a hydrophilic top and a superhydrophobic bottom and sidewall. A micro-nano/structure-induced hybrid wettability is acquired with a CA of 160 ± 3°. The hybrid wettability is excellent in accelerating droplet condensation and aggregation, which is beneficial for mass transfer in a fog harvesting system. Importantly, excellent chemical tolerance, passive anti-icing, active photothermal anti-icing, and sufficient durability enable the UPP/GNS film to maintain a stabilized fog collection efficiency under various external disturbances, such as salt, acid-/alkali solutions, and high temperature. Finally, the combination of hydrophilic and superhydrophobic wettability endows the UPP/GNS film with a fog collection efficiency of 1251 mg cm -2 h −1 . The economical and mass production method for the efficient fabrication of high-efficiency UPP/GNS fog collectors is a promising solution for mitigating the global water shortage.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2021
·
IF 4.094
Meng Xia,Xiao Yi,Shenxin Pan,Yong Liu,Hanhong Li,Zhengguang Sun,Xueliang Jiang,Yuhong Zhang
Oil/water separation is difficult but essential not only for the sustainable development of human society but also for the protection of the ecological. Developing materials with controllable wettability for efficient on-demand oil/water separation is urgently needed. Inspired by the structural and functional features of the cellular plasma membrane , in this work, a dual-sensitive heterogeneity organohydrogel was fabricated by combining thermal-responsive poly(N-isopropylacrylamide) (PNIPAM) and reactive polysiloxane particles (RPP). The resulting organohydrogel can adapt to temperature stimuli to realize super-wettability conversion (from superhydrophilicity (WCA is 0°) to superhydrophobicity (WCA is ∼160.5°) under-oil). In the dry state, the wettability of organohydrogel can also be adjusted to superamphiphobicity under water (OCA is ∼151.5°) or under oil (WCA is ∼162.4°) after being pre-wetted with water or oil. In addition, the outstanding film-forming property of the organohydrogel led to the formation of a coating layer on fiberglass fabric. Exhilaratingly, the coated fiberglass fabric displays stable recyclability, excellent chemical tolerance, and temporal stability, as well as demonstrates an excellent super-wettability conversion even after 90 cycles of the peeling test. Under different pH solutions, the WCA on the coated material surface was always 0° at 20 °C, while the measured WCA was always above 150° at 45 °C. Moreover, the coated fiberglass cloth could achieve on-demand oil/water mixture separation and selective separation efficiency above 98.5%. Thus, our work may pave the new ideas in the application of on-demand oil/water separation and oily wastewater purification in the further.
研究领域:
材料科学
·
环境科学
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 9
·5340-5348
·
IF 4.036
Wu Zhang,Jingchen Bai,Changlin Zhou,Hong Yu,Lei Wang
The heavy and rigid appearance of conventional burnt building tiles is not suitable for a global sustainable development strategy. Flexible facing tiles with lightweight and environmental materials are highly desirable for the construction industry today. In this work, water-based polymer emulsion-assisted flexible building tiles were prepared. Based on the method of achieving post crosslinking and improving adhesion with inorganic matrix–based materials, WPAs modified with GMA and KH570 display good chemical resistance and low solvent absorption (0.132 in water and 0.289 in ethanol respectively). The optimum mechanical performance of flexible building materials prepared with WPAs can strain 1.406% and stress 1.8658 MPa. The TGA, XRD, SEM and AFM results further indicate the excellent thermal stability and compatibility of flexible building tiles. Hence, flexible building tiles prepared with WPAs can be promising building materials for construction.
研究领域:
建筑材料
·
材料科学
·
可持续发展
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 13
·e55159
·
IF 2.7
Xu Chen,Kaikai Chen,Haibo Yan,Wei Zhao,Jingjing Yan,Weihong Gao,Changfa Xiao
The high-temperature industrial waste oil treatment has put forward new requirements for membrane materials. Poly (tetrafluoroethylene) (PTFE) is regarded as the excellent membrane material for membrane process, due to its excellent properties. Herein, the reinforced PTFE hollow fiber membrane (PTFE-HFM) was prepared by the combination of wrapping and heat setting technology. The objection of this study was focusing on the outstanding chemical and thermal resistance of PTEF-HFM for overcoming harsh waste oil treatment. PTFE-HFM exhibited better chemical resistance in the experiment of acid and alkali compared to PVDF-HFM, which the surface of PVDF-HFM corroded obviously and none of PTFE-HFM. The pore size and porosity were precisely adjusted by heat setting technology. Firstly, the morphologies of PTFE-HFM was investigated by scanning electron microscopy, which exhibited favorable interfacial bonding state between PTFE separation layer and supporting layer. Subsequently, the prepared membranes exhibited high-temperature waste oil permeability of 195 L m −2 h −1 bar −1 with only 3% attenuation in long-term operation. Besides, the rejection of lubricants contained activated carbon also reached to 99%. Overall, the facile preparation and excellent performance of robust reinforced PTFE-HFM highlights its great potential in treating high-temperature waste oil.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2019
·
IF 4.784
Quan-Yong Cheng,Xiao-Li Zhao,Yi-Dong Li,Yun-Xuan Weng,Jian-Bing Zeng
Traditional superhydrophobic cotton fabrics (SCFs) for oil/water separation were usually fabricated by surface coating with inorganic nanoparticles combined with nonrenewable and nonbiodegradable or even toxic fossil-based chemicals, which would lead to secondary environmental pollution after their lifetime. In this study, we report robust, nanoparticle-free, fluorine-free SFC, which was prepared by acid etching followed by surface coating with epoxidized soybean oil resin (CESO) and subsequent modification with stearic acid (STA). No toxic compound and no nanoparticle were included within the SCF and all the raw materials including cotton fabric, CESO and STA are biodegradable and derived from biological resources. The SCF showed excellent mechanical stability and chemical/environmental resistances. The superhydrophobicity of the SFC survived from mechanical abrasion , tape peeling, ultrasonication , solvent erosion and low/high temperature exposure. The SCF also exhibited good acid/alkali resistance with contact angle over 150° toward different pH water droplets. Moreover, the SCF could efficiently separate oil/water mixtures with efficiency above 97.9% and the superhydrophobicity remained after reusing for at least 10 times. The fully biological-derived SCF with excellent mechanical and chemical resistances exhibit great potential for separation of oil/water mixtures.
研究领域:
材料科学
·
环境工程
·
高分子化学
·
表面科学
·
可持续技术
✓ 已验证
DOI
高影响因子
Journal of Coatings Technology and Research
·
2018
·Vol. 16
·期 2
·415-428
·
IF 1.619
Wei Daidong,Liao Bing,Yong Qiwen,Wang Huiyi,Li Tao,Huang Jianheng,Pang Hao
Synthesis, characterization, and coating performance of castor oil (CO)-based waterborne hyperbranched polyurethane acrylate (WHPUA) emulsions are highlighted in this work. Herein, a second-generation CO-based hyperbranched polyester (C20) was synthesized by introducing the renewable CO as a B 3 core and dimethylolpropionic acid as an AB 2 monomer via a pseudo-one-pot condensation procedure. Three types of CO-based WHPUA emulsions were prepared through the addition of the hyperbranched C20 with maleic anhydride (MA) and the isocyanate-bearing semiadduct (IPDI-HEA) at different MA/IPDI-IH molar ratios without the addition of any emulsifiers. The prepared emulsions were further formulated into UV-curable coating formulations and exposed to a medium-pressure mercury lamp. Consequently, the obtained UV-cured coatings exhibited outstanding adhesion performance, excellent transparency, and an acceptable degree of final double bond conversion. Owing to a relatively low concentration of hydrophilic units and a large number of acrylate functionalities in the waterborne oligomer, the obtained films were endowed with high crosslinking density and low hydrophilic nature, thus producing enhanced tensile strength, pencil hardness, water resistance, and chemical resistance. Due to their combination of renewable materials, a waterborne system and a UV-curing technique, these CO-based WHPUA emulsions offer promising opportunities to be used as environmentally friendly coatings.
研究领域:
材料科学
·
聚合物化学
·
涂料技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）