JOURNAL OF MATERIALS SCIENCE
·
2019
·Vol. 54
·期 7
·5961-5970
·
IF 3.442
Luo Shuai,Qiao Xuan,Wang Qiu-Yu,Zhang Yun-Fei,Fu Ping,Lin Zhi-Dong,Du Fei-Peng,Cheng Chun
To develop low-cost and high-performance self-healing antifogging coatings, polyvinyl alcohol/hydrolyzed poly(styrene-co-maleic anhydride) (PVA/H-PSMA) coatings were prepared from a mixed solution of polyvinyl alcohol (PVA) and hydrolyzed poly(styrene-co-maleic anhydride) (H-PSMA) via spin coating and annealing. The microstructure, antifogging behavior, and self-healing ability were investigated. High transparency and low surface roughness were observed when the PVA/H-PSMA film was coated on glass slides. The PVA/H-PSMA coatings showed excellent antifogging performance in a warm, humid environment. The coatings also performed well when transferred from a refrigerator to room temperature. The antifogging coatings showed desirable water resistance due to strong chemical bonding between PVA and H-PSMA, as well as excellent self-healing ability due to hydrogen bonding self-assembly in the PVA/H-PSMA structure. The coatings still exhibited excellent antifogging effects after 20 scratching-repairing cycles, illustrating their potential use in practical applications.
研究领域:
材料科学
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2019
·
IF 3.42
Bo Tang,Weihua Feng,Jia Guo,Jun Sun,Sheng Zhang,Xiaoyu Gu,Hongfei Li,Wantai Yang
Pentaerythritol (PER) is generally used as carbon source in intumescent fire- retardant coating. In order to enhance water resistance of the coating, PER reacted with C9 maleic anhydride copolymer microsphere (C9-MAH) by esterification. The composition of the product PER-C9-MAH was analyzed by FTIR; TGA results show the thermostability of PER-C9-MAH is better than PER; and SEM observation clearly showed the obvious enlargement in particle size from PER to PER-C9-MAH. The contact angle of PER is 26.5° and it raised to 87.2° for PER-C9-MAH. The fire resistance changes of the coating before and after water/salt water soaking are compared. After soaking in distilled water and 5 g/L salt water for 48 h respectively, phenomena such as blistering and falling off will be found in the coating containing PER accompanied with 1.9 ± 0.01% (in water) and 2.4 ± 0.01% (in salt water) weight losses; however the coating containing PER-C9-MAH looked smooth with little defects, and the weight losses are just 0.3 ± 0.01% (in water) and 0.3 ± 0.01% (in salt water) respectively. After burning 30 min, the back temperature of coating containing PER raises 76.2 °C (soaked in water) and 157.0 °C (soaked in salt water) respectively; However, it is just 19.7 °C and 33.7 °C rise for coating containing PER-C9-MAH. TGA, SEM and Raman spectroscopy results document the char of the coating containing PER-C9-MAH shows higher quantity, density and degree of graphitization, so it exhibits enhanced strength.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 99
·97036-97047
·
IF 3.289
Mei Wang,Jianling Xia,Jianchun Jiang,Shouhai Li,Mei Li
Dipentene-maleic anhydride (DPMA) was prepared by the Diels–Alder addition of dipentene with maleic anhydride. DPMA was converted via ammonolysis with para-aminobenzoic acid (PABA) to form N-(3-amino-benzoic acid)terpene-maleamic acid (ABDPMA), which was then converted to zinc soap (ABDPMA-Zn) or calcium soap (ABDPMA-Ca). Their chemical structures were confirmed by FT-IR and ICP-AES. Thermal stabilizing effects of ABDPMA-Ca/ABDPMA-Zn were compared with ABTMA-Ca/ABTMA-Zn (ABTMA: N-(3-amino-benzoic acid)tung-maleamic acid), C36DA-Ca/C36DA-Zn (C36DA: dimer fatty acid), ZnMA/ZnO (MA: maleic acid), EFC/ZnSt2/ESBO (EFC: calcium salt of epoxidised fatty acid; ESBO: epoxidised soybean oil, and CaSt2/ZnSt2 (St: stearic acid). Thermal stabilities of poly(vinyl chloride) (PVC) compounds were determined using Congo Red test, discoloration test, ultraviolet-visible spectroscopy analysis and thermogravimetric analysis. Dynamic mechanical and tensile properties of the PVC compounds were also studied. Besides better plasticization performance, ABDPMA-Ca/ABDPMA-Zn improved the long thermal stability of PVC compared with ABTMA-Ca/ABTMA-Zn, C36DA-Ca/C36DA-Zn, and CaSt2/ZnSt2.
研究领域:
高分子化学
·
材料科学
·
塑料加工
·
热稳定化
·
功能添加剂
✓ 已验证
DOI
高影响因子
Materials Today Communications
·
2021
·
IF 3.383
Guang Yang,Qingqing Hu,Wenhao Yang,Wangyi Zeng,Yanxin Jiang,Liang Chai,Longjiang Deng
Carbonyl ion (CI) based magnetic particles are widely applied magnetic material. However, they are active metal and easily reacted with corrosive matters. Exploration of methods and techniques to reduce their reaction activity under corrosive environment never ceases. Herein, organic polyolefin copolymer maleic anhydride grafted polypropylene (PP-g-mah) is adopted as protection layer to chemically bond with flake carbonyl iron (FCI) particles. The hydrophobic PP-g-mah anchored FCI particles effectively integrates the natural barrier effect of stable polyolefin layer for resisting corrosion such thermal oxidation , electrochemical reaction , and chemical corrosion. Meanwhile, the hydrophobic nature of the PP-g-mah modified FCI particles can be utilized as useful component for preparing superhydrophobic flexible surface. This work provides a novel example to chemically coupling stable water resisting polymeric materials on FCI particles in a controlled manner to enhance the FCI particles anticorrosion ability. With future work of optimizing the coating uniformity and wettability , this work also paves the way for future development of corrosion resistive FCI based composites.
研究领域:
材料科学
·
表面化学
✓ 已验证
DOI
高影响因子
Materials Research Express
·
2020
·Vol. 7
·期 1
·015316
·
IF 1.929
Chaoyuan Shen,Shiai Xu
Three functionalized polypropylenes (PPs) were successfully prepared for use as the inner adhesive layer of aluminum/polymer laminated film by melt grafting of maleic anhydride (MAH) on PP with styrene (St), diallyl phthalate (DAP) and triallyl isocyanurate (TAIC) as co-monomers, respectively. The effects of these co-monomers (St, DAP and TAIC) on the grafting degree of MAH, gel content, thermal property and adhesive performance of MAH grafted PP (PP-g-MAH) were investigated. The results show that the T-peeling and heat-sealing strengths of TAIC-assisted PP-g-MAH (PP-g-MAH/TAIC) are 28.6 and 70.4 N /15 mm, which are increased by 33.6% and 20.8% compared to DAP-assisted PP-g-MAH (PP-g-MAH/DAP), and by 142.4% and 81.0% compared to St-assisted PP-g-MAH (PP-g-MAH/St), respectively. The grafting degree of MAH reaches a maximum of 2.3 wt% in PP-g-MAH/TAIC, which leads to a higher crystallization temperature than PP-g-MAH/DAP and PP-g-MAH/St. PP-g-MAH/TAIC also has better thermal stability than the other two functionalized PPs, as TAIC can effectively reduce PP chain scission and promote the formation of a cross-linked structure during the melt grafting.
研究领域:
高分子化学
·
材料科学
✓ 已验证
DOI
高影响因子
CATALYSIS COMMUNICATIONS
·
2014
·
IF 3.32
Yao Ma,Yangqiang Huang,Youwei Cheng,Lijun Wang,Xi Li
Ru-based catalysts, supported on activated carbon and carbon nanotubes, were synthesized by a simple and eco-friendly bioreduction method and tested in the liquid-phase hydrogenation of maleic anhydride. Over 2.0% Ru/AC, succinic anhydride was produced with a maximum yield of 99.2% without further hydrogenation to γ-butyrolactone. Well-defined spherical shapes with uniform small size of Ru nanoparticles and the residual plant biomass were responsible for the excellent catalytic activities and stabilities.
研究领域:
催化化学
·
纳米材料科学
·
绿色化学
·
有机合成
·
环境友好催化
·
生物质转化
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Xu-Feng Xia,Ying-Ying Gu,Shi-Ai Xu
In this study, an environment-friendly titanium (Ti) conversion coating was successfully deposited on the aluminum foil AA 8021 in the solution containing hexafluorotitanic acid (H 2 TiF 6 ), and its morphology, composition, growth process, hydrophilicity and corrosion resistance were characterized by scanning electron microscopy (SEM), atomic force microscopy (AFM), energy dispersive spectroscopy (EDS), X-ray photoelectric spectroscopy (XPS), contact-angle measurements (CAM) and salt spray exposure. The peeling strength between the Ti treated Al foil and the modified polypropylene (PP) film (PP grafted with maleic anhydride, PP- g -MAH) (Al/PP- g -MAH) was measured by T-peeling test. The results show that the Ti conversion coating is a multi-component coating composed primarily of metal oxides (TiO 2 and Al 2 O 3 ) and metal fluoride (AlF 3 ). Ti treated Al foil shows better corrosion resistance than untreated and alkali-cleaned Al foils. The peeling strength of PP- g -MAH film with Ti treated Al foils is approximately 30 times higher than that with untreated Al foils. Thus, Ti treatment is a promising approach to improve the corrosion resistance and peeling strength of aluminum/polymer composite film (Al/P) used in the lithium–ion battery package.
研究领域:
材料科学
·
表面工程
·
电化学
·
能源材料
·
复合材料
·
薄膜技术
·
电池封装技术
✓ 已验证
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2015
·Vol. 26
·期 8
·953-959
·
IF 1.757
Shuting Wang,Lan Cen,Qihao Wu
Maleated glycidyl 3-pentadecenyl phenyl ether with styrene (MGS) was synthesized from glycidyl 3-pentadecenyl phenyl ether (GPPE), maleic anhydride (MAH) and styrene (St) in the presence of AIBN initiator at 80°C, and then the resultant MGS was applied as a compatibilizer to prepare SBR/silica composites. Meanwhile, the commercial compatibilizer bis-(triethoxysilylpropyl) tetrasulfide (named Si69) added into composite was also prepared for comparison purpose. The synthetic MGS structure was characterized by GPC and FTIR, and SBR/silica compounds with different compatibilizer were analyzed using RPA, DMA and so on. The results showed that M̄n and M̄w of MGS were 19,538 g/mol and 23,790 g/mol, respectively. The curing time of compounds with MGS increased, whereas the maximum and minimum torques decreased. The addition of MGS decreased Payne effect of SBR/silica compounds, which implied an improvement of silica dispersion in the compounds. Bound rubber content of compound with MGS was about 1.7 times higher than the absence and 1.5 times higher than that with Si69. The tensile strength of the composites was improved by increasing compatibilizer loading, and the optimum value was observed at 6 phr of MGS. Meanwhile the use of MGS can improve the anti-aging property of composite. According to DMA, the tanδ value at 0°C of composite with MGS was higher than composite without compatibilizer suggesting that MGS can improve the wet skid resistance of composite. The SEM analysis revealed that introduction of MGS enhanced the compatibility between SBR and silica. Copyright © 2015 John Wiley & Sons, Ltd.
研究领域:
高分子化学
·
橡胶复合材料
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材料界面科学
·
功能高分子
·
聚合物改性
✓ 已验证
DOI
高影响因子
Journal of Coatings Technology and Research
·
2023
·Vol. 20
·期 6
·1867-1880
·
IF 2.3
Xue Tao,Yu Caili,Zhou Zhongqun,Zhang Faai
Achieving functional styrene–maleic anhydride (SMA) copolymer dispersant is highly attractive but still remains a challenge. Conventional modified SMA dispersants have complex modification steps, poor performance, and limited applications. Thus, a series of styrene–maleimide (SMI) copolymers with different functionality as amphiphilic dispersants for dispersing nano-SiO 2 in an aqueous solution were synthesized using a simple preparation process. The changes in the maleic anhydride groups during imidization were tracked using FTIR spectroscopy, 1 H-NMR, and GPC. A rotational viscometer and an inverted bottle method were used to measure the viscosity and coagulation time of the nano-SiO 2 aqueous dispersion system, respectively, after adding the SMI dispersants. The particle size, size distribution, and dispersant adsorption amount of the dispersion were analyzed using laser particle size analysis; FTIR spectroscopy and SEM; and TGA, respectively. The results showed that the hydrogen bonds formed between the amino groups in the dispersant and the hydroxyl groups on the SiO 2 surface during stirring allowed the dispersant to be adsorbed onto the SiO 2 surface after being added to the nano-SiO 2 aqueous system. The addition of the SMI dispersant enhanced the steric hindrance and electrostatic repulsion between the nanoparticles, thus making it possible for the SiO 2 nanoparticles not to easily aggregate in water, improving their dispersity and stability. Additionally, the type and amount of SMI dispersant used significantly affected the SiO 2 nanoparticles' ability to disperse in water. This makes SiO 2 particles convenient to use and transport, not produce dust pollution, and easy to store. Graphical abstract
研究领域:
高分子化学
·
纳米技术
·
材料科学
·
表面化学
·
胶体科学
✓ 已验证
DOI
高影响因子
MATERIALS AND STRUCTURES
·
2023
·Vol. 57
·期 1
·1-17
·
IF 3.8
Chen Xingren,Liu Zuguang,Fu Xiyao,Xie Xiongmin,Wang Ting,Rong Zhijuan,Nong Youchao,Lu Zhenren
A series of polycarboxylate superplasticizers (PCEs) with varying carboxyl densities were synthesized at room temperature using the molecular design principle. The PCEs molecular structure was determined using 1 H NMR and MALDI-TOF. The paste fluidity, foam stability as well as other performance of PCEs obtained was also tested. The investigations reveal that the PCEs with high carboxyl density cause the extended main chain conformation due to the strong electrostatic repulsion, resulting in the increase of hydrodynamic radius (Rh), which is beneficial to increase the ‘accessible carboxyl’ in the main chain, and improves its adsorption capacity; In addition, the PCEs with high carboxyl density also have high hydrophilicity, which will form micro bubbles to better disperse cement particles, and improve the fluidity of cement pastes. This study is aimed to provide a comprehensive understand for the mechanism of maleic anhydride-modified TPEG-type PCEs from the viewpoint of molecular architecture and conformation, and improve the workable performance of concrete mixture with the PCEs.
研究领域:
材料科学
·
高分子化学
·
土木工程
·
表面化学
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Yue Yang,Xingan Wu,Xueru Sheng,Jian Zhang,Peng Lu,Na Li,Qingwei Ping
Novel modified cellulose/biochar beads (MCBBs) were prepared and utilized as support to immobilize laccase to remove phenol from an aqueous system. Nano CaCO 3 was introduced in CBBs prepared stage to produce proper pore structure by reacting with HCl solution. CBBs were then modified with maleic anhydride to introduce carboxyl groups. By adsorption and covalent bonding, the laccase was immobilized on the MCBBs. The pH, laccase concentration, and contact time were chosen as the main parameters in the laccase immobilizing experiment and the effects of these parameters on immobilization rates and recovered activity were studied. The results demonstrated that the best conditions are: pH 4.0, concentration 8 g L –1 , and contact time 6 h. The thermal and operational stability of the immobilized laccase has attended a good performance under these conditions. The immobilized laccase was used to degrade phenol in an aqueous system and 40.97% removal was achieved after 72 h. The results suggest that as a new green material, MCBBs can be good support for immobilizing laccase. This technique has potential advantages in removing phenol from wastewater.
研究领域:
环境科学
·
生物技术
·
水处理
·
酶固定化
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 25
·10359-10369
·
IF 4.5
Liu Shujuan,Liu Lijuan,Yang Kangli,Yuan Zhiqing,Li Xinyi,Li Cancheng,Meng Shoutong
In order to improve the environmental problems caused by the extensive use of plastics, this paper introduced a new strategy to add and modify the physical structure, which could not only reduce the use of plastics, but also improve the mechanical properties of bamboo plastic composites. In this work, the bamboo-woven structure was introduced into the bamboo fiber/low density polyethylene (LDPE) composites to enhance the mechanical properties. Besides, to enhance the interfacial compatibility, maleic anhydride (MA) and polyvinyl alcohol (PVA) were used to modify LDPE and bamboo-woven structure, respectively. The mechanical properties of the prepared PVA-bamboo-woven structure/bamboo fiber/MA-LDPE composites were greatly improved. The bamboo plastic composites were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy, water contact angle (WCA) test and mechanical property test. The results showed that the bamboo-woven structure/bamboo fiber/MA-LDPE composite has superior properties at 45% bamboo fiber content. The tensile strength reached to 33.842 MPa, which was increased by 65.01% compared to the bamboo fiber/MA-LDPE composites, and the bending strength reached to 36.6585 MPa increased by 81.46% in relation to the bamboo fiber/MA-LDPE composites. In addition, even a large number of hydrophilic bamboo fibers and bamboo-woven structure were carried by the composites, a good hydrophobicity was still maintained and the WCA reached to 93.71°. The composites with excellent mechanical properties and hydrophobicity provided a reference for the use of bamboo fibers in environmentally friendly packaging materials.
研究领域:
材料科学
·
高分子科学
·
环境工程
·
生物复合材料
·
机械工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）