聚氨酯
蓖麻油
材料科学
复合材料
极限抗拉强度
复合数
热稳定性
木质素
环境友好型
化学工程
多元醇
吸水率
傅里叶变换红外光谱
异佛尔酮二异氰酸酯
作者
Wenbo Zhang,Yi Zhang,Haiyan Liang,Dunsheng Liang,Hongying Cao,Chengguo Liu,Yong Qian,Qiming Lu,Chaoqun Zhang
标识
DOI:10.1016/j.indcrop.2019.111836
摘要
Abstract In this work, a series of castor oil-based waterborne polyurethane composites were prepared with different amounts of sodium lignosulfonate as functional filler. The effect of the sodium lignosulfonate contents on the particle size and storage stability of the polyurethane composite dispersions was studied and discussed. In addition, the thermo-mechanical, thermal stability, mechanical properties and UV absorption of the resulting polyurethane films were characterized. The composite dispersion exhibits excellent storage stability and the bio-content of the resulting composite films is high up to 70%. In addition, it was found that the tensile strength and storage modulus increased with increasing the sodium lignosulfonate contents due to enhancement effect from the rigid benzene ring structure of sodium lignosulfonate and good compatibility between polyurethane matrix and the filler. The introduction of sodium lignosulfonate into WPU matrix rendered the excellent UV absorption of the composites due to the conjugated structures of lignin macromolecular. This work provides a new simple method to prepare environmental friendly bio-based waterborne polyurethane composites, which could find widely application in the field of UV absorption coatings and sunscreen cream.
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