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道康宁增强特种有机硅材料防护防晒效果
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《有机硅氟资讯》 2004年第8期10-10,共1页
关键词 道康宁公司 特种有机硅材料 防护 防晒 烷甲基硅氧烷 化妆用蜡
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有机硅改性水性聚氨酯-丙烯酸酯乳液的制备及性能 被引量:9
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作者 高明志 鲍俊杰 许戈文 《中国涂料》 CAS 2012年第1期20-23,共4页
采用种子乳液聚合方法合成了具有核壳结构的有机硅改性水性聚氨酯-丙烯酸酯复合乳液,TEM测试结果表明,该乳液具有核壳结构。通过共混与共聚体系衰减全反射红外光谱(ATR-FTIR)的比较及表面光电子能谱(ESCA)研究证实有机硅链段已被化学键... 采用种子乳液聚合方法合成了具有核壳结构的有机硅改性水性聚氨酯-丙烯酸酯复合乳液,TEM测试结果表明,该乳液具有核壳结构。通过共混与共聚体系衰减全反射红外光谱(ATR-FTIR)的比较及表面光电子能谱(ESCA)研究证实有机硅链段已被化学键入聚氨酯-丙烯酸酯分子链中,且硅氧烷链段有表面富集的倾向。表面水接触角及耐水性测试结果表明,随着有机硅含量的增加胶膜的水接触角增大,耐水性提高。 展开更多
关键词 聚氨酯 丙烯酸酯 羟基聚二甲基硅氧烷 水接触角 核壳结构
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Preparation and properties of organic-inorganic modified SiO_2 thin films 被引量:1
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作者 赵贤辉 李长虹 王海 《Journal of Central South University》 SCIE EI CAS 2013年第3期608-614,共7页
Polydimethylsiloxane (PDMS), tetraethoxysilane (TEOS), ethyl alcohol (EtOH) and deionized water were main raw materials to prepare silicone-modified hybrid thin films using sol-gel method. The effect of the cont... Polydimethylsiloxane (PDMS), tetraethoxysilane (TEOS), ethyl alcohol (EtOH) and deionized water were main raw materials to prepare silicone-modified hybrid thin films using sol-gel method. The effect of the contents of H2O and PDMS on thin films was studied. When the volume ratio of H20 to TEOS is 0.5, the optimum quality of thin films is obtained. And the gelation time is affected slightly by H20 content. Uniform thin films are obtained when the volume ratio of PDMS to TEOS is 0.2. Yet, the sol would be inactive in 6 d. Various properties of thin films were studied, including hardness, adhesive quality, hydrophobic property, corrosion protection property, and abrasion resistance. Test results show that the pencil hardness is generally 3-6 H, and adhesive quality achieves the highest standard of 0. When the sintering temperature is below 400℃, the contact angle is about 95° and hydrophobic films are obtained. The abrasion resistance of thin films is better than that of aluminum alloy when the sintering temperature is higher than 300℃. And the excellent corrosion protective effect is obtained by single-layer coating when the sintering temperature is higher than 400℃. 展开更多
关键词 sol-gel method hybrid thin film HARDNESS adhesive quality hydrophobic property CORROSION
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Nano-indentation profiles of intrinsic hardness and modulus of films based on silsesquioxane modified with titanium tetrabutoxide
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作者 陈平 孙科军 +2 位作者 刘今成 崔津津 胡立江 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2004年第6期644-648,共5页
This study is to analyze the influence of the modifier, 5~25 wt % titanium tetrabutoxide (TBO), on the hardness and elastic modulus of the films based on SSO deriving from hydrolytic condensation of (3-glycidoxypropy... This study is to analyze the influence of the modifier, 5~25 wt % titanium tetrabutoxide (TBO), on the hardness and elastic modulus of the films based on SSO deriving from hydrolytic condensation of (3-glycidoxypropyl)trimethoxysilane (GPMS) and vinyltrimethoxysilane (VMS), by the continuous stiffness measurement (CSM) technique of an instrumented-indentation testing (IIT) device. Films were synthesized by adding the stoichiometric amount of ethylenediamine (EDA) and benzoyl proxide (BPO) to SSO solutions in ethanol, dip-coating over glass substrates, and curing using an appropriate thermal cycle. Intrinsic values of hardness and elastic modulus were determined with the average values in “plateau region” from “four-layer” explanation. And the brittle index of the modified coating systems was analyzed. 展开更多
关键词 silesesquioxanes (3-glycidoxypropyl)trimethoxysilane VINYLTRIMETHOXYSILANE titanium tetrabutoxide HARDNESS elastic modulus brittle index
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Modification of methyl oleate for silicon-based biological lubricating base oil 被引量:1
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作者 Shixing Cui Zhi Yun Xia Gui 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2017年第1期130-136,共7页
A new kind of silicon-based biological lubricating base oil with good viscosity-temperature behavior,viscosity index,thermostability,oxidation stability and wear resistance performance was synthesized as a derivative ... A new kind of silicon-based biological lubricating base oil with good viscosity-temperature behavior,viscosity index,thermostability,oxidation stability and wear resistance performance was synthesized as a derivative of methyl oleate.Trimethylsilylation reaction was introduced to further improve methyl oleate oxidation stability and lubricity after epoxidation and open-ring reactions.The order of effectiveness of acid binding agent was N,N-diisopropylethylamine(DIEA) > pyridine > diethylamine > triethylamine,and the effects of various parameters on the trimethylsilylation reaction as well as on the silicon-oxygen bond stability and reaction yield were studied.A maximum yield of 34.54%was achieved at hydroxyl/trimethyl chlorosilane/DIEA molar ratio of1:1.25:1,reaction temperature 40℃,reaction time 1.5 h. 展开更多
关键词 Methyl oleate Trimethyl chlorosilane Acid binding agent N N-diisopropylethylamine Lubricity Silicon-based biological lubricating base oil
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