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基于用化学改性纳米粘土增强的未改性和改性热塑性淀粉的生物纳米复合薄膜。

Bio-nanocomposites films based on unmodified and modified thermoplastic starch reinforced with chemically modified nanoclays.

作者信息

Guarás M P, Menossi M, Nicolini A Torres, Alvarez V A, Ludueña L N

机构信息

Grupo de Materiales Compuestos Termoplásticos (CoMP), Facultad de Ingeniería, Instituto de Investigaciones en Ciencia y Tecnología de Materiales (INTEMA), Universidad Nacional de Mar del Plata (UNMdP) y Consejo Nacional de Investigaciones Científicas yTécnicas (CONICET), Avenida Colón 10850, 7600 Mar del Plata, Buenos Aires, Argentina.

出版信息

J Mater Sci. 2023;58(12):5456-5476. doi: 10.1007/s10853-023-08354-1. Epub 2023 Mar 13.

DOI:10.1007/s10853-023-08354-1
PMID:36969327
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10010222/
Abstract

UNLABELLED

The use of polymers capable of being degraded by the action of microorganisms and/or enzymes without causing harmful effects is a strategy in waste management and environmental care. In this work, bio-nanocomposites based on thermoplastic starch (TPS) were synthesized by reactive extrusion using a twin-screw extruder. Two strategies were evaluated to reduce the disadvantages of TPS for packaging applications. First, starch was chemically modified producing the reaction of native starch with chemical reagents that introduce new functional groups to reduce the water adsorption. And two, nano-fillers were incorporated into TPS in order to enhance the mechanical and barrier properties, driving to materials with improved performance/cost ratio. The synergistic strategies of chemical modification and incorporation of modified nanoclays were also effective to reduce the dependence of properties of TPS with the environment humidity and the evolution thereof over time, which influences the performance during the service life of the product.

SUPPLEMENTARY INFORMATION

The online version contains supplementary material available at 10.1007/s10853-023-08354-1.

摘要

未标注

使用能够在微生物和/或酶的作用下被降解且不会产生有害影响的聚合物是废物管理和环境保护中的一种策略。在这项工作中，基于热塑性淀粉（TPS）的生物纳米复合材料通过使用双螺杆挤出机的反应挤出法合成。评估了两种策略以减少TPS在包装应用中的缺点。第一，对淀粉进行化学改性，使天然淀粉与引入新官能团以减少吸水性的化学试剂发生反应。第二，将纳米填料加入TPS中以增强机械性能和阻隔性能，从而得到性能/成本比更高的材料。化学改性和加入改性纳米粘土的协同策略对于降低TPS性能对环境湿度及其随时间变化的依赖性也很有效，而这种依赖性会影响产品使用寿命期间的性能。

补充信息

在线版本包含可在10.1007/s10853-023-08354-1获取的补充材料。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9987/10010222/b953a3e7e8ed/10853_2023_8354_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9987/10010222/90f70216d7a1/10853_2023_8354_Fig1_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9987/10010222/b953a3e7e8ed/10853_2023_8354_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9987/10010222/90f70216d7a1/10853_2023_8354_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9987/10010222/dfda3a7d9019/10853_2023_8354_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9987/10010222/ad7025db5a9e/10853_2023_8354_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9987/10010222/d66bf0cb30ca/10853_2023_8354_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9987/10010222/8e6cbf971ef7/10853_2023_8354_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9987/10010222/db0dcfa7ac36/10853_2023_8354_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9987/10010222/0231f31df75a/10853_2023_8354_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9987/10010222/7ee7c63898a2/10853_2023_8354_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9987/10010222/c68a46103bc7/10853_2023_8354_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9987/10010222/b953a3e7e8ed/10853_2023_8354_Fig10_HTML.jpg

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