疏水性硅氧烷改性聚氨酯基涂层的制备和性能研究
Preparation and Properties of Hydrophobic Siloxane Modified Polyurethane Based Coating
陈垦 1张淼澜 1喻亮 1杨宇霆 1陈珊 1张群朝1
作者信息
- 1. 湖北大学材料科学与工程学院,武汉 430062
- 折叠
摘要
以辛胺(OA)开环γ-缩水甘油醚氧丙基三甲氧基硅烷(KH-560)当做扩链剂(OA-560),再使用异氟尔酮二异氰酸酯(IPDI)和聚1,4-丁二醇(PTMG)逐步加成合成了聚氨酯,最后使用γ-氨丙基三乙氧基硅烷(ATS)来封端完成双硅烷改性聚氨酯的合成.采用红外光谱表征了产物的结构,且使用了 XPS表征了涂层表面的Si的分布,并测试了双硅烷改性的粘附力、耐水性、耐热性和疏水性.结果表明改性后在垂直方向上可承受近9 MPa的强度,吸水率仅为0.5％,初始分解温度提高到350 ℃,接触角提高到102 °.
Abstract
The synthesis of a bis-silane-modified polyurethane was accomplished using octadecylamine(OA)and γ-glycidoxypropyltrimethoxysilane(KH-560)as chain extenders(OA-560),followed by stepwise addition with isophorone diisocyanate(IPDI)and poly(tetramethylene ether)glycol(PTMG).The synthesis was completed by capping with γ-aminopropyltriethoxysilane(ATS).The structure of the product was characterized using Fourier Transform Infrared Spectroscopy(FTIR),while the distribution of silicon on the coating surface was determined via X-ray Photoelectron Spectroscopy(XPS).Adhesion strength,water resistance,thermal stability,and hydrophobicity of the bis-silane-modified polyurethane were also evaluated.Results showed that after modification,the material could withstand a tensile strength of nearly 9 MPa in the vertical direction,had a water absorption rate of only 0.5％,an initial decomposition temperature increased to 350 ℃,and a contact angle improved to 102°.
关键词
辛胺/硅氧烷改性/聚氨酯/疏水涂层Key words
Octylamine/Siloxane Modification/Polyurethane/Hydrophobic Coating引用本文复制引用
出版年
2024
NETL
NSTL
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