硅烷改性胶原纤维/聚氯乙烯复合材料的界面相容性及其高弹抗蠕变性研究  

Study on interfacial compatibility and resilient creep resistance of silane-modified collagen fiber/polyvinyl chloride composites

作　　者：雷超 许维星[1] 曾运航[1,2] 石碧[1,2] LEI Chao;XU Weixing;ZENG Yunhang;SHI Bi(National Engineering Laboratory for Clean Technology of Leather Manufacture,Sichuan University,Chengdu 610065,China;College of Biomass Science and Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学制革清洁技术国家工程实验室,成都610065 [2]四川大学轻工科学与工程学院,成都610065

出　　处：《复合材料学报》2024年第6期2923-2934,共12页Acta Materiae Compositae Sinica

基　　金：国家重点研发计划(2019YFC1904500)。

摘　　要：胶原纤维(CF)的三维多层级结构具有对聚氯乙烯(PVC)进行高弹抗蠕变改性的天然优势,但亲水性的CF难以与疏水性的PVC有效相容,这限制了CF对PVC的改性效果。本文用氨基硅烷偶联剂(APTES)制备得到改性CF(M-CF),并用场发射扫描电子显微镜、傅里叶变换红外光谱仪和动态热机械分析仪等研究了M-CF的结构转变规律及M-CF/PVC的结构、蠕变行为和断裂行为。结果表明:APTES能在提高CF疏水性的同时,与PVC分子链形成离子键和共价键,从而显著改善CF与PVC的界面相容性。此外,APTES改性能充分打开M-CF的三维多层级结构,使PVC更好地渗入M-CF相区,并形成更多的作用位点。由此,PVC分子链的运动受到了明显抑制,M-CF/PVC的形变活化能较纯PVC提高了30.7%,蠕变寿命延长至纯PVC的80.5倍和CF/PVC的2.3倍,且可回复形变(11.50%)增至传统改性PVC的1.4倍以上。综上,CF与PVC相容性的提升使M-CF/PVC表现出了理想的高弹抗蠕变性。The three-dimensional hierarchical structure of collagen fiber(CF)has the natural advantage of resilient creep-resistant modification of polyvinyl chloride(PVC),but the hydrophilic CF is difficult to be compatible with the hydrophobic PVC effectively,which limits the modification efficacy of PVC by CF.Modified CF(M-CF)was prepared with amino-silane coupling agent(APTES).The structural transformation pattern of M-CF,and the structure,creep behavior,and fracture behavior of M-CF/PVC were investigated by field emission scanning electron microscopy,Fourier transform infrared spectroscopy,and dynamic mechanical analysis.The results show that APTES improves the hydrophobicity of CF and formed ionic and covalent bonds with PVC chains,thereby greatly improving the compatibility between CF and PVC.In addition,APTES modification fully opens the three-dimensional hierarchical structure of M-CF,which allows PVC to better penetrate into theM-CF phase region and form more blocking sites between PVC and M-CF.As a result,the movement of PVC chains is obviously inhibited,the deformation activation energy of M-CF/PVC is increased by 30.7%compared with that of pure PVC,the creep lifetime of M-CF/PVC is extended to 80.5 times than that of pure PVC and 2.3 times that of CF/PVC,and the reversible deformation(11.50%)of M-CF/PVC is increased to more than 1.4 times than that of the conventional modified PVC.In summary,the improved compatibility between CF and PVC endows M-CF/PVC with ideal resilient creep-resistance.

关 键 词：胶原纤维 硅烷 聚氯乙烯 抗蠕变性 回弹性 界面相容性 

分 类 号：TB332[一般工业技术—材料科学与工程]