摘要
以磷酸和环氧树脂E20制备了水性的磷酸改性环氧树脂(PAER),考察了反应温度、反应时间、投料比等因素对环氧树脂转化率的影响,得到了制备PAER的最佳条件。采用傅里叶变换红外光谱和核磁共振波谱对PAER结构进行了表征。用KOH中和PAER得到磷酸改性环氧树脂的钾盐(PAERK),测试了PAERK乳液的性质。使用含氟表面活性剂(FP-6812)与PAERK复配制得了含氟改性环氧树脂钾盐(PAERKF),测试了PAERKF乳液施覆改性前后聚丙烯腈纤维(PAN)与水的接触角及纤维在环氧树脂中的分散性,并通过场发射扫描电子显微镜对纤维的表面形貌进行了观察。结果表明,PAERKF的最佳上浆浓度为0.6%(质量分数,下同),最佳施覆量为5.0 mg/g;经PAERKF施覆改性后的PAN纤维与水的接触角可达146.94°,纤维具备了高疏水特性;经PAERKF施覆改性后的PAN在环氧树脂基体中的分散系数(β)可达0.89,纤维在树脂基体中的分散性得到改善。
Water-based phosphoric acid-modified epoxy resin(PAER)was prepared by using phosphoric acid and epoxy resin(E20)as raw materials,and its molecular structure was characterized by Fourier-transform infrared spectroscopy and nuclear magnetic resonance spectroscopy.The potassium salt of phosphoric acid-modified epoxy resin(PAERK)was obtained by a neutralization reaction of PAER with KOH,and then the fluorine-containing epoxy resin potassium salt(PAERKF)was prepared by using PAERK and fluorine-containing surfactant as raw materials.The results indicated that the optimum sizing concentration and coating amount for PAERKF was 0.6 wt%and 5.0 mg/g,respectively.After modification with PAERKF,the contact angle between the polyacrylonitrile(PAN)fiber and water reached 146.94°,indicating a highly hydrophobic feature.The PAERKF-modified PAN fiber achieved a dispersion coefficient of 0.89 in the epoxy matrix,and the dispersibility of fibers in the matrix was improved.
作者
周存
左春龙
ZHOU Cun;ZUO Chunlong(School of Chemistry and Chemical Engineering,Tianjin Polytechnic University,Tianjin 300387,China;Tianjin Engineering Research Center of Textile Fiber Interface Treatment Technology,Tianjin 300270,China)
出处
《中国塑料》
CAS
CSCD
北大核心
2020年第4期12-19,共8页
China Plastics
基金
国家重点研发计划资助(2016YFB0303200)。
关键词
磷酸
环氧树脂
水性上浆剂
高疏水
聚丙烯腈纤维
phosphoric acid
epoxy resin
water-based sizing agent
highly hydrophobic feature
polyacrylonitrile fiber
