Degradation of PLA Biocomposites Containing Mango Seed and Organo Montmorillonite Minerals

被引：7

作者：

Bezerra Lima, Edla Maria ^{[1
]}

Oliveira, Renata Nunes ^{[2
]}

Middea, Antonieta ^{[3
]}

de Castro, Izabela Miranda ^{[1
]}

Mattos, Mariana da Costa ^{[1
]}

Matta Neves, Thiago Torres ^{[2
]}

da Costa, Lucas Felix ^{[2
]}

Neumann, Reiner ^{[3
]}

Bruno Tavares, Maria Ines ^{[4
]}

机构：

[1] Brazilian Agr Res Corp, Embrapa Food Technol, Rio De Janeiro, Brazil

[2] Univ Fed Rural Rio de Janeiro, Postgrad Program Chem Engn, Seropedica, Brazil

[3] Univ Fed Rio de Janeiro, Ctr Mineral Technol, Rio De Janeiro, Brazil

[4] Univ Fed Rio de Janeiro, Inst Macromol, UFRJ, Rio De Janeiro, Brazil

来源：

JOURNAL OF NATURAL FIBERS | 2022年 / 19卷 / 05期

关键词：

Degradation; PLA; mango seed; organo-montmorillonite; HYDROLYTIC DEGRADATION; ACID PLA; MECHANICAL-PROPERTIES; BIODEGRADATION; POLYLACTIDE; BLENDS; COMPOSITES; CELLULOSE; KINETICS;

D O I：

10.1080/15440478.2020.1788488

中图分类号：

TB3 [工程材料学]; TS1 [纺织工业、染整工业];

学科分类号：

0805 ; 080502 ; 0821 ;

摘要：

The research of polylactic acid (PLA) packaging materials with high degradation rate is important toward high rate biodegradable packaging materials. The samples (PLA-mango seed residue-clays) were evaluated by degradation analysis (in water and in soil) followed by FTIR, NMR, SEM/EDS and Texturometer analysis. The samples degradation was more effective in water than in soil, probably due to a coupled effect of water and microbiological degradation. PLA-kernel-tegument samples degraded more than PLA-kernel samples due to the effectiveness action of kernel and tegument together in the samples' degradation. PLA-Bofe samples degraded less than PLA-kernel-tegument and PLA-kernel-tegument-Bofe samples, PLA-Chocolate clay (Bofe and Chocolate are organo-montmorillonite clays) samples degraded more than PLA-kernel-tegument-Chocolate samples and less than PLA-kernel-tegument samples, probably due to multiples interaction among the Chocolate clay and mango components. The FTIR bands after samples hydrolytic and soil degradation presented low intensity, probably indicating materials degradation. New bands were observed after soil degradation, most likely related to accumulated soil and band displacement, indicative of samples degradation. The NMR relaxation data confirm the degradation process observed form the other techniques, observing the changes in the values of proton relaxation data for all samples, comparing the values after and before been degraded.

引用

页码：1783 / 1791

页数：9

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