Enhancing the mechanical properties of polylactic acid (PLA) composite films using Pueraria lobata root microcrystalline cellulose

被引：11
作者：
Zhu, Borui [1 ,2 ]
Zhao, Shuang [2 ,3 ]
Guo, Jie [1 ,2 ]
Song, Ke [1 ,2 ]
He, Jian [1 ,2 ]
Liu, Shima [1 ,2 ]
Zhou, Xianwu [1 ,2 ]
机构：
[1] Jishou Univ, Coll Chem & Chem Engn, Jishou 416000, Peoples R China
[2] Jishou Univ, Key Lab Hunan Forest Prod & Chem Ind Engn, Natl & Local United Engn Lab Integrat Utilizat Euc, Zhangjiajie 427000, Peoples R China
[3] Zhangjiajie Coll, Zhangjiajie 427000, Peoples R China
来源：
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES | 2024年 / 279卷
关键词：
Polylactic acid; Microcrystalline cellulose; Pueraria lobata (Willd.) Ohwi; 3-Aminopropyl triethoxysilane; Poly(butyleneadipate-co-terephthalate); POLY LACTIC-ACID; FIBERS;
D O I：
10.1016/j.ijbiomac.2024.135579
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
To enhance the mechanical properties of polylactic acid (PLA) material, the PLA-based composite films are prepared by using Pueraria lobata (Willd.) Ohwi root microcrystalline cellulose (PRMCC) treated with 3-aminopropyl triethoxysilane (KH550) silane coupling agent as the dispersed phase through solvent casting method. The effects of the concentrations of PRMCC and KH550 as well as the KH550 pretreating condition (ethanol concentration) on the tensile properties of PLA-based composite films are investigated. The PLA-based composite film treated with 5 wt% PRMCC and 18 wt% KH550 (pretreated by 90 % EtOH) exhibits the greatest performance. Its elongation at break value is detected to be 4.0 %, 1.6 times as large as that of pure PLA film. The water absorption of the as-prepared PLA-based composite film is reduced from 0.49 % of the unmodified PLA/PRMCC film to 0.12 %. Moreover, the modified PLA-based composite film has a hydrophobic surface and exhibits good thermal stability. Compared with pure PLA film, the modified PLA-based composite film exhibits improved UV shielding performance with acceptable transparency. Furthermore, after adding poly(butylene adipate-co-terephthalate) (PBAT) to the composite system, the elongation at break of the PLA-based composite film is up to 7.2 %. This research can provide theoretical guidance for enhancing the performance of PLA products.
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页数：12
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