Modified cellulose nanocrystals based on SI-ATRP for enhancing interfacial compatibility and mechanical performance of biodegradable PLA/PBAT blend

被引：35
作者：
Sun, Minqi [1 ]
Zhang, Ling [1 ]
Li, Chunzhong [1 ]
机构：
[1] East China Univ Sci & Technol, Nanomat Frontiers Sci Ctr Materiobiol & Dynam Che, Shanghai Engn Res Ctr Hierarch Nanomat,Minist Edu, Key Lab Ultrafine Mat,Sch Mat Sci & Engn, Shanghai 200237, Peoples R China
来源：
POLYMER COMPOSITES | 2022年 / 43卷 / 06期
基金：
中国国家自然科学基金;
关键词：
cellulose nanocrystals; glycidyl methacrylate; interfacial compatibility; PLA; PBAT blend; surface-initiated atom transfer radical polymerization; ACID)/POLY(BUTYLENE ADIPATE-CO-TEREPHTHALATE) BLENDS; REACTIVE EXTRUSION; NANO-SILICA; FILMS; MORPHOLOGY; BARRIER; MONTMORILLONITE; REINFORCEMENT; LOCALIZATION; PARTICLES;
D O I：
10.1002/pc.26653
中图分类号：
TB33 [复合材料];
学科分类号：
摘要：
To make up for the brittleness of poly(lactic acid) (PLA), people usually introduce flexible poly(butylene adipate-co-terephthalate) (PBAT) which greatly reduces the strength and limits toughening effect due to unfavorable immiscibility of the blends. Herein, functionalized biodegradable cellulose nanocrystals (CNCs) were used as enhancement to simultaneously improve strength and toughness of PLA/PBAT blend. To improve the interaction between PLA and PBAT, poly(glycidyl methacrylate) (PGMA) was grafted on the surface of CNC via a surface-initiated atom transfer radical polymerization reaction. After the addition of CNC-PGMA30, the phase size of PLA/PBAT (70/30 wt%) reduces dramatically, showing improved interfacial compatibility between PLA and PBAT. Meanwhile, prepared PLA/PBAT/CNC1.0-PGMA30 composite has tensile strength of 49.6 MPa and elongation at break of 268.5%, demonstrating considerably increased strength and toughness in comparison to the pure PLA/PBAT blend.
引用
收藏
页码：3753 / 3764
页数：12
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