耐摩擦型全氟聚醚硅氧烷的制备与性能

发布时间：2018-06-25 19:48

本文选题：全氟聚醚 + 硅氧烷　；参考：《精细化工》2017年07期

【摘要】：以K型全氟聚醚醇、K型三羟基全氟聚醚、双端Z型全氟聚醚醇、烯丙基氯和三甲氧基硅烷为原料,氯铂酸为催化剂,通过硅氢加成制备了三类全氟聚醚硅氧烷。用FTIR、~1HNMR对K型全氟聚醚硅氧烷的结构进行了表征,并利用接触角和耐摩擦实验对全氟聚醚硅氧烷的耐摩擦性能进行了测试,考察了全氟硅氧烷链结构、含量、相对分子质量和硅氧烷水解促进剂对涂层耐摩擦性能的影响。结果表明:质量分数为0.1%的三类全氟聚醚硅氧烷涂层对水和正十六烷的接触角均分别高于113.1°和65.2°,具有良好的疏水疏油性能。双端Z型全氟聚醚硅氧烷(Mn=2 500)的耐摩擦性能最好,在负载质量为1 035 g时,经钢丝绒循环摩擦2 500次后,水接触角仍可保持100°以上。在K型全氟聚醚三硅氧烷(Mn=2 800)喷涂液中,添加质量浓度为0.5 mg/L的乙酸和质量分数为0.5%的异丙醇混合硅氧烷水解促进剂,可将涂层的耐摩擦性能从1 000次提升到1 100次。
[Abstract]:Three kinds of perfluoropolyether siloxanes were prepared by hydrosilylation with K type perfluoropolyether, double terminal Z type perfluoropolyether, allyl chloride and trimethoxysilane as raw materials and chloroplatinic acid as catalyst. The structure of K type perfluoropolyether siloxane was characterized by FTIR 1H NMR. The friction resistance of perfluoropolyether siloxane was tested by contact angle and friction resistance test. The chain structure and content of perfluorosiloxane were investigated. Effects of relative molecular weight and siloxane hydrolysis accelerator on the friction resistance of the coating. The results showed that the contact angles of three kinds of perfluoropolyether siloxane coatings with 0.1% mass fraction were higher than 113.1 掳and 65.2 掳for water and hexadecane, respectively, and had good hydrophobic and oil hydrophobic properties. The double end Z type perfluoropolyether siloxane (MNO 2 500) has the best friction resistance. When the loading mass is 1 035 g, the water contact angle can still be kept above 100 掳after 2 500 times of circular friction of steel wire velvet. In K-type perfluoropolyether trisiloxane (MNO 2 800) spray solution, adding 0.5 mg / L acetic acid and 0.5% isopropanol mixed siloxane hydrolysis accelerator can improve the friction resistance of the coating from 1 000 times to 1 100 times.
【作者单位】：天津科技大学化工与材料学院;
【分类号】：O634.41

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