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- 2020
埃洛石纳米管/水性聚氨酯氟化复合膜的制备及性能
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Abstract:
利用原位聚合及表面氟化的方法制备了埃洛石纳米管/水性聚氨酯（HNTs/WPU）复合膜，并考察氨基化埃洛石纳米管（AHNTs）的含量及十七氟癸基三甲氧基硅烷（FAS）氟化对AHNTs/WPU复合膜性能的影响。结果表明：随着AHNTs与WPU的质量比增大，AHNTs/WPU复合膜的力学性能及耐热性呈先升高后降低的趋势，耐水性得到改善。当AHNTs与WPU的质量比为1.5%时，AHNTs/WPU复合膜具有较好的综合性能。AHNTs/WPU复合膜的拉伸强度、断裂伸长率及初始分解温度（Td5）与纯WPU膜相比分别提高了50%、35%及9℃，复合膜的吸水率降低到5.8%，水接触角提高到95.1°。AHNTs/WPU复合膜经表面氟化处理后，水接触角进一步增大到114.5°，呈现出疏水性，表面氟化处理对复合膜的力学性能及吸水率也有一定的促进作用。 The halloysite nanotubes/waterborne polyurethane (HNTs/WPU) composite film was synthesized by both in-situ polymerization and surface fluorination method. The effects of the content of amine-modified halloysite nanotubes(AHNTs) and the modification of fluoroalkylsilane(FAS) on the properties of AHNTs/WPU composite film were also investigated. The results show that the mechanical properties and thermal resistance of the AHNTs/WPU composite film increase first and then decrease with the increase of the mass ratio of AHNTs to WPU, and the hydrophobicity improve. When the mass ratio of AHNTs to WPU is 1.5%, the AHNTs/WPU composite film has better comprehensive properties. The tensile strength of the AHNTs/WPU composite film increases by 50% and the elongation at break increases by 35%; the initial thermal degradation temperature (Td5) increases by 9℃ comparing with pure WPU. The water absorption ratio of the AHNTs/WPU composite film decreases to 5.8%, the water contact angle increases to 95.1°. After fluorination of the AHNTs/WPU composite film, the water contact angle of the composite film is 114.5°. The AHNTs/WPU composite film shows hydrophobicity. The surface fluorination treatment has significant effect on the mechanical properties and water absorption ratio of the AHNTs/WPU composite film. 国家重点研发计划（2019YFB1504303
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