材料科学
聚乳酸
结晶度
复合数
纳米复合材料
复合材料
膜
固化(化学)
二氧化钛
降级(电信)
化学工程
聚合物
遗传学
电信
生物
计算机科学
工程类
作者
Yanxin Wang,Shiwei Wang,Tiantian Wang,Shiwei Wang,Xuan Wu,Lu Guo,Weizhen Xie,Peng Qiu,Quanxiao Dong,Qian Li
标识
DOI:10.1016/j.mtcomm.2023.105553
摘要
In order to solve the problems of moisture retention and environmental pollution in external curing of concrete, a polylactic acid (PLA)/titanium dioxide (TiO2) composite concrete curing membrane with ultraviolet aging resistance and hydrolytic degradation was prepared by melt blending method. It was found that TiO2 nanoparticles as nucleating agent significantly improved the water vapor barrier properties of PLA by regulating the crystallinity and prolonging the tortuous path. Compared with pure PLA, the barrier properties of the composite membrane added with TiO2 is improved by 34.3%. In addition, the degradation weight loss percent of the composite membrane reaches 69.9% due to the hydrophilic hydroxyl groups on the surface of TiO2 nanoparticles. The PLA/TiO2 composite membrane still maintains excellent mechanical properties and barrier properties after UV aging due to the UV shielding effect of TiO2.
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