Mechanical and Thermal Properties of Toughened Poly(L-lactic) Acid and Lignin Blends

被引：1

作者：

Mu, Chunyu ^{[1
]}

Xue, Liyuan ^{[1
]}

Zhu, Jun ^{[1
]}

Jiang, Man ^{[1
]}

Zhou, Zuowan ^{[1
]}

机构：

[1] Southwest Jiaotong Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Adv Technol Mat, Chengdu 610031, Peoples R China

来源：

BIORESOURCES | 2014年 / 9卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Poly(L-lactic) acid; Lignin; Toughening; Heterogeneous nucleation; Fully degradable blends; OIL PALM BIOMASS; PHYSICAL-PROPERTIES; CRYSTALLIZATION; DEGRADATION; COMPOSITES; PLA;

D O I：

10.15376/biores.9.3.5557-5566

中图分类号：

TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];

学科分类号：

0805 ; 080502 ; 0822 ;

摘要：

Fully degradable poly(L-lactic) acid (PLLA) and lignin blends were prepared using the melt blending method. The impact strength of PLLA was dramatically improved by 52.4% and 36.6% with the addition of 5 wt% and 10 wt% of lignin, respectively. Meanwhile, the Young's modulus was maintained. Polarized optical microscopy (POM) results indicated that lignin served as a nucleating agent for the heterogeneous crystallization of PLLA in blends, which was responsible for the improvement in the impact strength. The introduced lignin also promoted the cold-crystallization of PLLA, which was demonstrated by differential scanning calorimetry (DSC). The blends of PLLA with lignin are considered to be a promising material because of the improved toughness, the full degradability, and the lower price compared with pure PLLA.

引用

页码：5557 / 5566

页数：10

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