受贻贝粘附蛋白中(左旋多巴)(L-DOPA)结构的启发,采用含邻酚羟基的没食子酸(GA)作为低成本仿生改性剂与含有伯胺基的氨基硅烷(KH792)通过水解缩合反应、迈克尔加成反应和席夫碱反应共沉积在聚酯(PET)纤维表面,在PET纤维表面形成具有反应活性的功能涂层。采用傅里叶红外光谱(FT-IR)、扫描电镜(SEM)、X射线光电子能谱(XPS),接触角、吸油率,质量损失,力学性能等对改性后纤维进行分析测试。结果表明:GA/KH792聚合共沉积于纤维表面,形成了具有高表面能的聚合物微纳糙化形貌。改性后PET纤维的热稳定性、力学性能及表面润湿性得到提高,当GA和KH792的添加量为1∶1时,制备的G/K-PET-2纤维的接触角为128.71°,其吸油率、接触角、表面能相较于PET纤维,分别提高了66.3%、15.9%和76.4%;抗拉强度、断裂伸长率、断裂强力分别提高了13.7%、1.9%和6.9%。该方法可有效实现PET纤维表面的功能活化,具有成本低、操作简单等优势。
Inspired by the L-DOPA structure in mussel adhesion protein,uses gallic acid (GA) containing ortho-phenol hydroxyl as a low-cost biomimetic modifier and aminosilane (KH792) containing primary amine groups were co-deposited on the surface of polyester fiber (PET) through hydrolysis condensation reaction,michael addition reaction,and schiff base reaction,and functional coatings with reactive activity were formed on the surface of PET.Fourier transform infrared spectroscopy (FT-IR),scanning electron microscopy (SEM),X-ray photoelectron spectroscopy (XPS),contact angle,oil absorption,mass loss and mechanical property tests were adopted to analyze and evaluate the modified PET fibers.The results showed that GA/KH792 was successfully polymerized and co-deposited on the surface of fibers,forming a polymeric micro-nano-rough morphology with high surface energy.The thermal stability,mechanical properties and surface wettability of the modified polyester fibers were significantly improved.The contact angle of the prepared G/K-PET-2 fiber was 128.71° when the addition amount of GA/KH792 was 1∶1.Compared with PET fibers,the oil absorption rate,contact angle,and surface energy of modified PET increased by 66.3%,15.9%,and 76.4%,respectively,while the tensile strength,elongation at break,and breaking strength were enhanced by 13.7%,1.9%,and 6.9%,respectively.This approach could effectively realize the functional activation of polyester fiber surface,and possess the advantages of cost-saving and simplified operation.
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基金资助
山东省高等学校“青创科技支持计划”项目(2021KJO84);山东省交通科技发展计划项目(2023B89和2022B101);山东省科技型中小企业创新能力提升工程项目(2022TSGC2056)
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