纳米二氧化硅改性氧化石墨烯/水性聚氨酯复合材料的制备及性能  

Preparation and Performances of Nano-SiO_(2) Modified Graphene Oxide/Waterborne Polyurethane Composites

作　　者：阎宗尧 乔鸿超 王育奎 梅延坤 李骏 秦承暄 YAN Zongyao;QIAO Hongchao;WANG Yukui;MEI Yankun;LI Jun;QIN Chengxuan(Shandong Expressway Construction Management Group Co.,Ltd.,Jinan 250098,China;Shandong Expressway Jiwei Highway(Jining)Co.,Ltd.,Jining 272113,China;Shandong High Speed Engineering Testing Co.,Ltd.,Jinan 250002,China)

机构地区：[1]山东高速建设管理集团有限公司,山东济南250098 [2]山东高速济微公路(济宁)有限公司,山东济宁272113 [3]山东高速工程检测有限公司,山东济南250002

出　　处：《塑料工业》2024年第9期63-68,共6页China Plastics Industry

摘　　要：利用四乙氧基硅烷(TEOS)原位水解法制备了纳米SiO_(2)改性氧化石墨烯(GO-S),使用傅里叶变换红外光谱、拉曼光谱、X射线光电子能谱、透射电子显微镜、扫描电子显微镜对GO和GO-S进行对比研究,证明了GO-S的成功制备。进一步地,制备了水性聚氨酯(WPU)、WPU/GO和WPU/GO-S,对比研究了样品的性能。拉伸性能测试结果表明,与纯WPU相比,WPU/GO的拉伸强度有所提升,但断裂伸长率显著下降。WPU/GO-S的拉伸强度提升至WPU的256%,断裂伸长率略微下降。水接触角测试结果表明,WPU/GO-S的水接触角高达75°,明显高于WPU的61°,说明GO-S的加入显著提高了WPU涂层的疏水性。耐腐蚀性测试结果表明,WPU/GO-S的阻抗模最高,比基板增大约1个数量级,也明显优于WPU/GO涂层,证明WPU/GO-S的耐腐蚀性最佳。Nano-SiO_(2) modified graphene oxide(GO-S)was prepared by in-situ hydrolysis of tetraethoxysilane(TEOS).Comparative studies were conducted on GO and GO-S using infrared spectroscopy,Raman spectroscopy,X-ray photoelectron spectroscopy,transmission electron microscopy,and scanning electron microscope,demonstrating the successful preparation of GO-S.The waterborne polyurethane(WPU),WPU/GO and WPU/GO-S composites were further prepared,and their properties were comparatively studied.The mechanical performance results show that,compared with pure WPU,the tensile strength of WPU/GO is improved,but the elongation at break is significantly reduced.The tensile strength of WPU/GO-S is significantly increased to 256%of WPU,while the elongation at break is slightly decreased.The water contact angle test results show that the water contact angle of WPU/GO-S is as high as 75°,which is significantly higher than that of WPU(61°),indicating that the addition of GO-S significantly improves the hydrophobicity of WPU coatings.The corrosion resistance test results show that the impedance modulus of WPU/GO-S is the highest.Compared with the substrate,the impedance modulus of WPU/GO-S is increased by about one order of magnitude and also significantly better than that of WPU/GO coating.The WPU/GO-S has the best corrosion resistance.

关 键 词：氧化石墨烯 二氧化硅 水性聚氨酯 拉伸性能 耐腐蚀性 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]