文献类型：期刊文献

英文题名：A GREEN UV-RESISTANT NR-POLYDOPAMINE-TIO2@SIO2 COMPOSITE WITH HIGH MECHANICAL PROPERTIES BASED ON AN ELECTROSTATIC ADSORPTION EFFECT

作者：Li, Y.[1];Yuan, Y. Z.[1,2];Zhang, Y.[1];Sun, J. Y.[1,2];Tian, X. H.[1,2];Jin, J.[3];Wu, W. B.[3]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Key Lab Adv Polymer Mat, Shanghai 200237, Peoples R China;[3]Shanghai Engn Res Ctr Cards & Identificat Document, Shanghai 200063, Peoples R China

年份：2025

卷号：98

期号：1

起止页码：62

外文期刊名：RUBBER CHEMISTRY AND TECHNOLOGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001461762400005)】；

基金：Acknowledgement This work was financially supported by the Fundamental Research Funds for the Central Universities of China (grant 22A201514002) .

语种：英文

摘要：Antioxidants are usually added into NR to resist the oxidation caused by UV irradiation, whereas commonly used antioxidants are usually organic and prone to decomposition and migration. Inorganic UV absorbers such as titanium dioxide (TiO2) and silicon dioxide (SiO2) nanoparticles can maintain chemical stability under UV radiation, whereas the hydroxyl radicals from electron-hole pairs in TiO2 would damage the NR matrix and the poor compatibility of TiO2 with NR limited the process. Therefore, inert SiO2 is coated on TiO2 (TiO2@SiO2) to reduce its photocatalytic activity, and polydopamine (PDA) is coated on rubber to improve stability. The strong light-absorbing properties of PDA could also improve the UV-resistant ability of NR. In addition, poly(sodium-p-styrenesulfonate) coating NR-PDA provides the matrix negative charge, and polydiallyl dimethyl ammonium chloride wrapped around TiO2@SiO2 can give a positive charge, thereby moderating the compatibility between the filler and the matrix through electrostatic adsorption. The green UV-resistant natural composite NR-PDA-TiO2@SiO2 was fabricated. The composites exhibited strong tensile strength and excellent UV-resistant properties, which particularly extend the service life of rubber products as UV-shielding materials, thus showing significant potential in extreme environments.