聚羟基烷酸酯的特性、生产和改性

IF 5.4 Q1 ENVIRONMENTAL SCIENCES Resources, conservation & recycling advances Pub Date : 2024-02-19 DOI:10.1016/j.rcradv.2024.200206
Xiangmin Liang , Daniel K. Cha , Qingqing Xie
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引用次数: 0

摘要

聚羟基烷酸酯(PHA)是由多种细菌合成的聚合物,可用于碳储存和能量储存。PHAs 可生物降解且无毒。它们还具有与石油基聚合物相似的特性。因此,这些材料有望成为传统塑料的替代品。本综述旨在全面概述从生产到应用的 PHA 研究。本综述总结了各种 PHA 均聚物和共聚物的热性能和机械性能,并与常见的石油基聚合物进行了比较。比较结果表明,断裂伸长率是许多 PHA 的主要弱点。本综述总结了混合培养发酵法生产 PHA 微生物时使用的不同有机废物。比较了原料发酵、培养物选择和 PHA 积累的重要参数。pH 值和有机物负载率对 PHA 的总体产量有显著影响,不同的原料会产生不同的 PHA 组成。本综述阐述了通过物理(混合和纤维增强)和生物(共饲)改良 PHA 机械性能的方法。拉伸性能是改性后机械性能的主要改进。本文还介绍了 PHA 及其衍生物的当前应用。它们主要应用于医药、农业和包装行业。PHA 的广泛应用面临着生产成本高和机械性能有限等挑战。本研究旨在促进对 PHA 生产成本效益方法的进一步研究,并探索更多改性技术。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Properties, production, and modification of polyhydroxyalkanoates

Polyhydroxyalkanoates (PHAs) are polymers synthesized by diverse bacteria for carbon and energy storage applications. PHAs are biodegradable and nontoxic. They also exhibit properties similar to those of petroleum-based polymers. Therefore, these materials are promising alternatives to conventional plastics. This review aims to provide a comprehensive overview of PHA research, from production to application. This review summarizes the thermal and mechanical properties of various PHA homopolymers and copolymers, and compares them with those of common petroleum-based polymers. This comparison indicates that elongation at break is a major weakness of many PHAs. Different organic wastes used in PHA microbial production by mixed culture fermentation are summarized in this review. Important parameters of feedstock fermentation, culture selection, and PHA accumulation were compared. The pH and organic loading rate significantly affected the overall PHA yield, and various feedstocks led to different PHA compositions. Physical (blending and fiber reinforcement) and biological (cofeeding) modifications to improve the mechanical properties of PHA are elaborated in this review. Tensile properties are the major improvements among the mechanical properties after modification. Current applications of PHA and its derivatives are also presented in this work. They are primarily applied in the medicine, agriculture, and packaging industries. The widespread application of PHA faces challenges such as high production costs and limited mechanical properties. This study intends to stimulate further research into cost-effective methods for PHA production and to explore additional modification techniques.

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来源期刊
Resources, conservation & recycling advances
Resources, conservation & recycling advances Environmental Science (General)
CiteScore
11.70
自引率
0.00%
发文量
0
审稿时长
76 days
期刊最新文献
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