中国塑料2023，Vol.37Issue(12)：14-22,9.DOI:10.19491/j.issn.1001-9278.2023.12.003
ODA-TA@L-CNC的制备及对多功能PLA复合膜的影响
Preparation of ODA-TA@L-CNC and its effect on multifunctional PLA composite films
孙子佳 1雒翠梅 1王启航 1王旭洁 1母军1
作者信息
- 1. 木质材料科学与应用教育部重点实验室,北京林业大学,北京 100083
- 折叠
摘要
Abstract
Lignocellulosic nanocrystals(L-CNC)were prepared by using bamboo residue as a raw material and then modi-fied by grafting octadecylamine(ODA)onto their surfaces through utilizing the chemical reactivity of catechol groups in tannic acid(TA).A series of composite films based on modified L-CNC and poly(lactic acid)(PLA)were prepared through solution casting.The effect of L-CNC content on the mechanical,antioxidant,UV shielding,and hydrophobic properties of the composite films were investigated.The results indicated that the grafting modification of ODA im-proved the compatibility of L-CNC with PLA.When the content of ODA-TA@L-CNC was 1 wt%,The composite films showed elongation at break of 20.42%and fracture toughness of 8.55 MJ/m3,which were 3 times and 10 times higher than those of neat PLA film,respectively.Meanwhile,their tensile strength was increased to 46.84 MPa,and their hydrophobic performance was significantly improved with a stable contact angle of about 100° within 1 minute.When the content of ODA-TA@L-CNC was 1.5 wt%,the composite films obtained a free radical scavenging rate of 49.30%for DPPH,indicating a good antioxidant property.They also gained an average blocking ratio of 44.81%in the wavelength range of the ultraviolet region.This means that the composite films can shield most of the UVB spectrum(280～320 nm).关键词
聚乳酸/木质纤维素纳米晶/单宁酸/十八胺/复合膜Key words
poly(lactic acid)/lignocellulosic nanocrystals/tannic acid/octadecylamine/composite film分类
化学化工引用本文复制引用
孙子佳,雒翠梅,王启航,王旭洁,母军..ODA-TA@L-CNC的制备及对多功能PLA复合膜的影响[J].中国塑料,2023,37(12):14-22,9.
