单宁酸改性制备光敏碳纳米管及UV光固化AESO复合膜的制备

Preparation of Photosensitive Carbon Nanotubes by Tannic Acid Modification and Preparation of UV-curable AESO Composite Films

本文以单宁酸(TA)和甲基丙烯酸缩水甘油酯(GMA)为原料,通过开环反应制备出含有双键的光敏单宁酸(pTA),并通过π-π非共价键作用使其吸附到碳纳米管上,得到pTA修饰后的具有良好分散性的光敏碳纳米管(pTA/MWCNTs)。再将该pTA/MWCNTs作为填料添加到环氧大豆油丙烯酸酯(AESO)中,通过UV光固化得到AESO-pTA/MWCNTs复合膜。利用pTA对MWCNTs进行改性,提高了MWCNTs的分散性,同时引入双键,使得pTA/MWCNTs能够参与到光固化过程中,提高了碳纳米管与AESO基质间的界面粘结力,对AESO起到了比较好的增强作用。本文还研究了pTA/MWCNTs的加入对AESO复合涂料光固化动力学及涂膜性能的影响,结果表明该pTA/MWCNTs的掺入提高了光固化AESO复合膜的力学性能,当掺入量为0.8%时,对膜的增强效果最好,与纯AESO比较,其拉伸模量提高了390%,拉伸强度提高了110%。

Tannic acid(TA)and glycidyl methacrylate(GMA)were used to prepare a photosensitive tannic acid(pTA)containing double bonds through ring-opening reaction.The pTA modified photosensitive carbon nanotubes(pTA/MWCNTs)with good dispersibility were adsorbed onto carbon nanotubes throughπ-πnoncovalent interaction.The as-prepared pTA/MWCNTs was subsequently incorporated into acrylated epoxidized soybean oil(AESO)covalently via UV curing technology.Modification of MWCNTs by pTA not only improves the dispersibility of MWCNTs,but also introduces double bonds,which enables pTA/MWCNTs to participate in the photocuring process,improves the interfacial adhesion between carbon nanotubes and AESO matrix and plays a better role in enhancing AESO.The effect of pTA/MWCNTs addition on photocuring kinetics and film properties of AESO composite was also studied.The results showed that the addition of pTA/MWCNTs improved the mechanical properties of photocuring epoxy resin.When the amount of pTA/MWCNTs was 0.8%(mass fraction),the enhancement effect on the film was the best.Compared with pure AESO,the tensile modulus of the film increased 390%and the tensile strength increased 110%.