ACS Applied Polymer Materials
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2024
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IF 4.4
Chunlin Ren,Peixin Niu,Shihu Zhang,Xiaonan Han,Zhiqiang Guo,Yujin Zhang,Saisai Zhang,Xingjiang Liu,Liuhe Wei
Silane-modified polyurethanes (SPU-MDI, SPU-IPDI, and SPU-HDI) were synthesized by reacting various isocyanates (MDI, IPDI, and HDI) with poly(ether triol), followed by siloxane capping. The branched structures and properties of these SPUs were systematically characterized and evaluated. These SPU resins, upon moisture curing, yield elastomers exhibiting excellent mechanical properties and high transmittance (>92%). Incorporating polyether tertiary alcohol into the polymer chain markedly reduces the viscosity and average particle size of the SPUs due to its de-entangling effect. Specifically, the SPU-HDI resin displayed a low viscosity of 2548 mPa·s at 25 °C and an average particle size of 3.12 nm. Notably, elastomers derived from SPU-MDI and SPU-IPDI resins demonstrated tensile strengths greater than 10 MPa, surpassing that of SPU-HDI-based elastomer (∼5.0 MPa). This significant enhancement broadens the potential applications of these materials.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
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2016
·Vol. 163
·期 13
·C798
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IF 3.014
Bing Xue,Mei Yu,Jianhua Liu,Songmei Li,Liangliang Xiong,Xiangxin Kong
3-glycidoxypropyl-trimethoxysilane (GPTMS) functionalized graphene oxide (GO) was used to synthesize graphene-based film for corrosion protection of AA2024-T3 aluminum alloy. GO covalently reacted with the silanol group from the hydrolyzed GPTMS monomer, forming silane functionalized GO (silane-GO) linked by C-O-Si covalent bonds. The silane coupling agents acted as a 'bridge' to link GO to adjacent GO and to the metal surface by covalent bonds. The corrosion protective properties of silane-GO film were determined by electrochemical measurements and immersion tests. Results indicated that silane-GO film provided effective protection for the metal substrate and the readily corrodible areas (at the periphery of protruding constituent particles). This was due to the good barrier property from layered GO, the filled defects and gaps between GO, and the enhanced adhesion strength of GO to adjacent GO and the film to the substrate. The protective efficiency of silane-GO film was up to 95.0%. The successful application of silane-GO film on AA2024-T3 aluminum alloy suggests that there is the considerable potential for broad application of graphene-based protective film on metals, even on the metals with corrosion-sensitive areas.
研究领域:
材料科学
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腐蚀与防护
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DOI
高影响因子
POLYMER COMPOSITES
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2025
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IF 4.7
Yiming Guo,Yu Zhang,Tingting Miao,Tengyu Feng,Haodong Chen,Weiwei Dong,Lili Zhang,Xiaodong Wang,Jun Shen
To improve the strength and toughness of epoxy resins and their composites, a series of silane-modified polyurethanes (SM-PUs) was synthesized. The SM-PUs were then incorporated into the epoxy resin system to prepare silane-modified polyurethane toughened epoxy resins and their composites. The relationship between the structures of the SM-PUs and the properties of the resin systems and their composites was investigated. The results revealed that the addition of the SM-PUs can effectively improve both the strength and toughness, as well as the corrosion resistance of resin systems. Among all resin systems, PUSiM/EP/DDM with two benzene rings and PUSiT/EP/DDM with a benzene ring exhibited the highest strength and toughness, respectively. The maximum values of the tensile strength, elongation at break, critical stress intensity factor (K IC ), critical energy release rate (G IC ), and impact strength of the resin systems reached 82.08 MPa, 10.06%, 1.64 MPa·m 1/2 , 1.77 kJ·m −2 , and 26.87 kJ·m −2 , respectively, showing an improvement of 23.5%, 89.5%, 53.3%, 284.8%, and 36.4% over those for EP/DDM. Moreover, PUSiT/EP/CF/DDM prepared by using PUSiT/EP/DDM with the best toughness showed the highest mechanical performance. Simultaneously, the strengthening and toughening mechanisms were explored through SEM and the simulated internal network. Highlights A series of silane-modified polyurethanes was synthesized for toughening EP. Addition of SM-PUs enhanced the mechanical properties of resins and composites. The composite with high-toughness resin showed the best strength properties. SEM and the simulated internal network revealed toughening mechanisms.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
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2024
·
IF 3
Ma Xin-Yue,Cao Fang-Chao,Tang Yan,Jiang Jun-Cheng,Huang An-Chi
In this paper, a modified material EG-PR with hydrophobic and oleophobic properties was successfully prepared with expanded graphite (EG) as the main raw material and 1H,1H,2H,2H-perfluorodecyltrimethoxysilane (PR) and silane coupler KH-570 (KH) as surface modifiers. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy verified the effective modification that produced a Si‒O‒Si network structure. The water contact angle (WCA) of 127° and oil contact angle (OCA) of 110° of EG-PR, unmodified EG-IA, were 92° and 20°, respectively. Fire-extinguishing tests conducted on heptane pool fire showed that EG-PR decreased the time required to extinguish the fires by 23 s, consumed less extinguishing agent, and suppressed the production of carbon dioxide during combustion compared to EG-IA, indicating its higher effectiveness. EG-PR demonstrated rapid fire-extinguishing capabilities during the experiments. It effectively extinguished the flames, created a protective layer on the oil pool’s surface, efficiently isolated heat and oxygen, and effectively suppressed flame propagation on the surface. This study highlights the potential of surface-modified expandable graphite in enhancing fire safety applications. Graphical abstract
研究领域:
材料科学
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消防工程
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DOI
高影响因子
POLYMER BULLETIN
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2024
·
IF 3.1
Gong Zheqing,Chen Lijun
Butyl acrylate, methyl methacrylate, vinyl acetate and tertiary vinyl carbonate (VeoVa10) are the main monomers, and alkyl alcohol polyether sulfosuccinate monoester sodium salt (A-6820) and alkyl alcohol polyoxyethylene ether (EFS-900) are used as the emulsifiers. Vinyl triethoxysilane is used as the modified monomers. Potassium persulfate is the initiator. The silicon-modified polymer latex is prepared via the semi-continuous seeded emulsion polymerization. The structure of the latex film is characterized by Fourier transform infrared spectroscopy. Latex films are tested by the thermogravimetric analysis, differential scanning calorimetry and contact angle. The particle size of the latex is measured with the zetatrac dynamic light scattering instrument. The conditions for preparing the resultant latex is optimized and obtained as follows: the amount of emulsifier is 6 wt%; the amount of initiator is 0.4 wt% and the amount of VETS is 4 wt%. The appearance of the resultant latex is translucent and blue, and the average particle size of the polymer latex and its distribution is small. The water contact angle increased from 68.07 to 91.00 °. Thermal decomposition temperature of the film of the silicone-modified polymer latex is 16.17 °C higher than that of the film of conventional polymer latex.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
Journal of Environmental Chemical Engineering
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2023
·
IF 7.7
Zihao Sun,Xiaowen Zhang,Ji Wang,Chaoyi Pan,Lishi Feng,Sili Chen
Water contamination issues caused by spilled oil or other organic pollutants are urgently requiring the development of new oil sorbent materials that may desirably have the functionalities of reusability and efficiency. To further improve hydrophobicity , sorption capacity and oil retention rate, in this study, cotton modified with vinyl triethoxysilane (VTES, KH-151) to improve them. The introduction of KH-151 onto the surface of cotton was verified by SEM, FT-IR, XPS and EDS. The oil-water selectivity , sorption and retention capacities and cycling performance were tested. Compared with the raw cotton, modified cottons surface enhanced the rate and capacity of oil separation from oily water, the sorption capacity for soybean oil was increased from 9.83 g g –1 to 27.26 g g –1 and for dimethylsilicone oil from 7.92 g g –1 to 25.09 g g –1 after 10 cycles. The oil retention rates of modified cottons exceed 95 % for soybean oil within 10 min at low specific volumes. It gradually decreased by specific volume increasing but still maintained over 75 % at the 14 cm 3 g –1 . These indicated the hydrophobic and superoleophilic properties, and good recyclability . The developed method and sorbent hold promise for easy storage, environmentally friendly, reusable and relatively cost-effective oil cleanup in emergency treatment of spilled oil or other organic pollutants.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Jianxiang Lin,Shaoping Chen,Zhenyang Qi,Wenhao Fan,Qiang Zhang,Tao Zhang,Zhiyi Zhang,Qingsen Meng
Significant physicochemical differences between metals and thermoplastics pose challenges for achieving strong interfacial bonding under conventional forming processes. This work presents a novel approach using an external electric field (EEF) to activate functional groups at metal-polymer interfaces, forming complex chemical bonds and strong heterogeneous connections. Silane-modified PA66 composites filled with high-content aluminum spheres were fabricated. Experimental results show that the chemical bonding between Al and PA66 under EEF is due to extensive functional group reactions and secondary bonding within Al-PA66 interface, achieving a remarkable ultimate tensile strength of 65 MPa for the composite with 50 wt% Al filling. Moreover, dissimilar joints of composites and 6061T6, made by friction stir welding, exhibit high strength due to the formation of a “Novel Net-Metallurgy Bonding Structure” during frictional heat transfer. This work provides new insights and theoretical guidance for interfacial bonding in metal-polymer heterogeneous interfaces.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2025
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IF 2.8
Xinxin Fu,Yufeng Li,Jian Ye,Mingwei Ge,Yu Zhang,Yahui Han,Hailin Yu,Jinjun Deng,Yunan He,Yanbin Tong,Hongsheng Liu
The development of fracturing fluids is pivotal for optimizing oilfield production, with polymer-based fracturing thickeners emerging as a principal focus of research owing to their superior rheological properties. In this investigation, polyacrylamide emulsions were synthesized through inverse emulsion polymerization, utilizing water glass and silane-modified water glass as the modifying agents. A comprehensive assessment of their performance was conducted. The findings demonstrated that polymer systems containing 0.2% sodium metasilicate and 0.03% silane-modified sodium metasilicate exhibited remarkable rheological behaviors. Specifically, the apparent viscosity increased by 25% and 40%, respectively, while shear recovery tests revealed enhancements in shear viscosity of 26% and 90% at low shear rates. Furthermore, at a proppant concentration of 20%, the proppant transport capacity of these two enhanced systems improved by 58.63% and 67.22%, respectively. This enhancement is likely attributable to the high bond energy of the silicon–oxygen (Si–O) bonds in water glass, which imparts greater structural stability to the polymer. The incorporation of silane-modified water glass further improves the dispersion and compatibility within the polymer matrix. The results offer a robust theoretical foundation for its use as a fracturing thickener.
研究领域:
石油工程
·
高分子化学
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DOI
高影响因子
Journal of Coatings Technology and Research
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2024
·
IF 2.3
Da Yaling,Xue Xiangxin
Ultraviolet curable composite coatings are an eco-friendly option with the absence of volatile organic compound emissions. Achieving a better interface between epoxy acrylate (EA) and mica is essential for the enhanced mechanical and barrier properties of composite coatings. This paper presents a strategy for modifying mica through in situ grafting with various silane coupling agents (KH550, KH560, and KH570) and preparing composite coatings of EA/mica using a blending method. The results indicate that the silane-modified mica exhibited enhanced compatibility with EA coatings. The mechanical properties, thermal stability, and corrosion resistance of epoxy acrylate/silane-modified mica coatings were improved compared to epoxy acrylate/unmodified mica composite coatings. KH570 was found to be the most effective modifier for enhancing these properties of the coatings. Relative to EA/unmodified mica composite coating, the impact resistance of EA/KH570-modified mica composite coatings doubled, with increases in T 5 and T 10 by 49.7°C and 9.7°C, respectively. During the 9 day monitoring period using electrochemical impedance spectroscopy, the total impedance modulus | Z | f =0.01 Hz of EA/KH570-modified mica composite coatings was discovered to be 6–9 times higher than that of unmodified mica coatings, with the R t value higher by two orders of magnitude.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 53
·期 15
·10920-10932
·
IF 2.993
Qian Shaoping,Sheng Kuichuan,Yu Kai,Xu Linqiong,Fontanillo Lopez Cesar A.
Poly(lactic acid) (PLA) is a potential green alternative for conventional petroleum-based plastics. However, the brittleness limits its application (e.g., agricultural films, garbage bags, plastic bags, food containers, food packaging). In this study, silane-compatibilized (triethoxyvinylsilane, A-151) bamboo cellulose nanowhiskers (BCNW) were introduced into a PLA matrix to toughen the composites. The A-151 successfully grafted on the surface of cellulose, and the thermal degradation stability of BCNW decreased after A-151 modification. Morphological, tensile and thermal properties of the toughened PLA bionanocomposites were investigated, and the toughen mechanism was clarified. The silane linked BCNW and PLA via Si–O–C bonds and hydrogen bonds. Elongation at break of the composites remarkably increased from 12.3 ± 1.7% (untreated) to 213.8 ± 21.6% (16 wt% A-151 treated). Both tensile strength and modulus decreased with the silane treatment. Typical toughness fracture characteristic (wire-drawing) was observed on the fractural surface. Glass transition temperature and crystallinity decreased from 45.6 °C/30.33% (untreated) to 33.6 °C/13.23% (16 wt% A-151 treated).
研究领域:
材料科学
·
生物复合材料
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DOI
高影响因子
MATERIALS LETTERS
·
2016
·
IF 2.437
Xiaogang Guo,Xueming Li
This work firstly utilizes electrophoretic deposition (EPD) followed by perfluorodecyltriethoxysilane (FAS-17) modification as a novel and facile method to fabricate superhydrophobic ZnO and Bi 2 O 3 coatings with great potential application. The stable suspension consists of isopropyl alcohol and polyethyleneimine (PEI). The FESEM investigations show that the resulting two superhydrophobic oxide coatings with reticular-like structures uniformly distribute in nanoscale. The wettability results demonstrate that the water contact angle of all samples can reach to ca. 167° and remain almost unchange after exposure for nine weeks, resulting into an excellent stable superhydrophobicity. Most importantly, this paper provides an effective and low-cost strategy to fabricate to other functional superhydrophobic coatings for various applications.
研究领域:
材料科学
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表面工程
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 133
·期 8
·
IF 1.768
Pengjuan Li,Fuwei Nian,Min Zhang,Minmin Shen,Yongqiang Dai,Hao Pang,Bing Liao
A low-residual siloxane-modified polyacrylate pressure-sensitive adhesive (PSA) with a high peeling strength was prepared by seeded semicontinuous emulsion polymerization. 3-Glycidyloxypropyltrimethoxysilane was introduced into the acrylic (AC) PSA through a thermal posttreatment method to crosslink with AC. To improve the adhesion properties, a polymeric emulsifier, 2-acrylamido-2-methyl-1-propanesulfonic acid, was introduced into the system with the conventional emulsifier. Several key polymerization conditions, such as the initiator concentration, mass ratio of soft monomer to hard monomer, the content of polymeric emulsifier, and siloxane dosages were examined in detail. Then, the optimal conditions and a proper preparation process were established. The results show that we achieved not only a low repeeling residue with high tack and peeling strength but also excellent properties of high-temperature aging resistance and water resistance. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 42975.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
危险品化学品经营许可证（带存储）