相关实验视频

Updated: Jul 25, 2025

A Facile and Eco-friendly Route to Fabricate PolyLactic Acid Scaffolds with Graded Pore Size

A Facile and Eco-friendly Route to Fabricate PolyLactic Acid Scaffolds with Graded Pore Size

Published on: October 17, 2016

融化可处理的可生物降解混合物聚乙烯糖醇塑化纤维素二甲酸与聚乳酸和聚乙烯基酸盐-协同甲酸盐的纤维素二甲酸

Bethuel M Tselana¹, Sudhakar Muniyasamy², Vincent O Ojijo²

¹Polymer Technology Division, Department of Chemical, Metallurgical and Materials Engineering, Tshwane University of Technology, Pretoria, 0183 South Africa.

Journal of polymers and the environment

|June 26, 2023

概括

这项研究表明,用聚乙烯甘醇 (PEG) 塑化纤维素二酸盐 (CD) 并将其与聚乳酸 (PLA) 或聚丁烯基酸盐 (PBAT) 混合,可以提高化的可加工性并保持生物降解性.

科学领域:

材料科学材料科学材料科学
聚合物化学聚合物化学
生物技术是生物技术.

背景情况:

纤维素衍生提高了融的可加工性,但往往降低了生物降解性.
传统的塑化剂和纤维素衍生物的加工方法可能是不可生物降解的.
开发可化加工和可生物降解的纤维素基材料对于可持续应用至关重要.

研究的目的:

调查聚乙烯甘醇 (PEG) 作为增塑剂对纤维素二酸盐 (CD) 化的可加工性和生物降解性的影响.
评估由PEG塑化CD与聚乳酸 (PLA) 和聚乙烯基酸盐 (PBAT) 组成的混合物的性能.

主要方法:

纤维素二酸盐 (CD) 用35重%的PEG (PEG-200) 进行了塑化.
塑化CD与PLA (40%重量) 和PBAT (60%重量) 用双螺丝挤出机进行融化混合.
使用动态机械分析 (DMA) 和扫描电子显微镜 (SEM) 分析材料性能.
生物降解性通过108天的有氧堆肥测试来评估.

主要成果:

PEG有效地塑化了CD,将其玻璃过渡温度从220°C降低到100°C以下.
CD/PEG-PBAT混合物表现出增强的延伸到破裂 (734%) 和更光滑的形态,这表明混合性得到改善.
这种CD/PEG-PLA混合物的抗拉强度与塑性CD (约20.6MPa) 的抗拉强度相当.
观察到显著的生物降解:41%的CD/PEG-PBAT (60%的PBAT) 和107%的CD/PEG-PLA (40%的PLA) 在108天后.

结论:

可化处理和可生物降解的纤维素二甲酸盐混合物可以成功合成.
用PEG塑化,然后与PBAT或PLA混合,提供了一条可行的途径来增强纤维素材料的性能.
这些发现支持开发可持续的,高性能纤维素基材料.

关键词:

生物降解生物降解纤维素二甲酸酸盐是一种纤维素二甲酸.聚乙烯添加剂-联合-甲酸.聚乙烯乙烯糖醇是一种聚乙烯基醇.聚乳酸是一种多乳酸.

更多相关视频

Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer

Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer

Published on: November 30, 2020

Scalable Step-by-Step Approach of Sustainable Bioplastic Production from Food Waste

Scalable Step-by-Step Approach of Sustainable Bioplastic Production from Food Waste

Published on: July 18, 2025

相关概念视频

Types of Step-Growth Polymers: Polyesters

Types of Step-Growth Polymers: Polyesters

The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...

Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)

Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)

Acyclic diene metathesis polymerization or ADMET polymerization involves cross-metathesis of terminal dienes, such as 1,8-nonadiene, to give linear unsaturated polymer and ethylene. As ADMET is a reversible process, the formed ethylene gas must be removed from the reaction mixture to complete the polymerization process.
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...

Polymer Classification: Architecture

Polymer Classification: Architecture

Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...