Abstract
A degradable concrete curing material containing lignin, polyethylene glycol and polylactic acid was prepared in this work. The mean square displacement and energy distribution of the composites were obtained by molecular dynamics simulation. The effect of polyethylene glycol and lignin on the crystallization, degradation, water retention and surface properties of the composite membrane were studied. The crystallinity of the polylactic acid composite with 5 wt% polyethylene glycol and 5 wt% lignin was up to 71.65%, and the water retention performance was also the best compare with other composites. Due to the good hydrophilic properties of polyethylene glycol and lignin, the degradation performance of the composite film was significantly improved. As a green water retaining material, the composite has a good application prospect in the field of building engineering.
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