Abstract Castor-oil-based waterborne acrylate (CWA)/SiO2 hybrid coatings with organic-inorganic covalent cross-linked network structures were prepared via sol–gel and thiol-ene reactions. The stabilities of the emulsions as well as the structures, thermal properties, and mechanical properties of the films were characterized. The results showed that the emulsions had good stability. All of emulsions remained stable after being stored for more than 6 months and the mean particle sizes of emulsions increased from 33.8 to 70.1 nm as the SiO2 loading increased from 0 to 20 wt%. Furthermore, the thermal and mechanical properties of the films improved significantly. The residues at 600℃, glass transition temperature (Tg), crosslink density, Young’s modulus, and pencil hardness increased from 4.6 %, 9.4℃, 23 mol/m3, 2.1 MPa, and H to 16.2 %, 19.2℃, 736 mol/m3, 30.0 MPa, and 3H, respectively. Among these coatings, the coating with 10 wt% of SiO2 loading had best comprehensive performances for the application of wood coating.

中文翻译：

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溶胶-凝胶和硫醇-烯反应制备的蓖麻油基水性丙烯酸酯/SiO2杂化涂料

摘要 通过溶胶-凝胶和硫醇-烯反应制备了具有有机-无机共价交联网络结构的蓖麻油基水性丙烯酸酯（CWA）/SiO2杂化涂层。表征了乳液的稳定性以及薄膜的结构、热性能和机械性能。结果表明乳液具有良好的稳定性。所有乳液在储存超过 6 个月后都保持稳定，随着 SiO2 负载量从 0 重量％增加到 20 重量％，乳液的平均粒径从 33.8 纳米增加到 70.1 纳米。此外，薄膜的热性能和机械性能显着提高。600℃下的残留物、玻璃化转变温度 (Tg)、交联密度、杨氏模量和铅笔硬度从 4.6 %、9.4℃、23 mol/m3、2.1 MPa 和 H 增加到 16.2 %、19.2℃，分别为 736 mol/m3、30.0 MPa 和 3H。在这些涂料中，SiO2 负载量为 10 wt% 的涂料在木器涂料应用中的综合性能最好。