Abstract
Poly(lactic acid) as a biodegradable aliphatic polyester has some drawbacks that limit its marketability such as high cost and low biodegradation rate. In this work, these drawbacks were overcome by adding an abundant agricultural residue, rice straw, to PLA. Rice straw was thermoplasticized by using alkali pulping and benzylation processes. The benzylated rice straw pulp and pulping liquor considerably improve the biodegradation rate of PLA about 20 times faster after 128 days burying in soil. In addition, these lignocellulosic fillers can increase the PLA crystallinity degree, Vicat softening point and thermal stability comparing with untreated rice straw.
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