相关实验视频

Updated: Jun 22, 2026

Using Polystyrene-block-polyacrylic acid-coated Metal Nanoparticles as Monomers for Their Homo- and Co-polymerization

Using Polystyrene-block-polyacrylic acid-coated Metal Nanoparticles as Monomers for Their Homo- and Co-polymerization

Published on: July 9, 2015

从商业塑料中制备块共聚合物稳定微球,并将其作为微塑料代理物用于降解研究

Jeppe Madsen¹, Arianna Rech¹, Nanna B Hartmann²

¹Department of Chemical and Biochemical Engineering, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark.

Langmuir : the ACS journal of surfaces and colloids

|August 24, 2024

概括

研究人员开发了一种简单的方法,用PET和PLA等常见聚合物制造塑料微粒. 这些颗粒模仿微塑料并显示不同的降解率,为聚合物稳定性和环境影响提供了洞察力.

科学领域:

聚合物科学聚合物科学
环境科学环境科学
材料科学材料科学材料科学

背景情况:

由于其持久性,微塑料带来了环境挑战.
开发标准化的微塑料模仿品对于研究至关重要.
了解聚合物降解途径对于环境风险评估至关重要.

研究的目的:

介绍一种新的一制法,用于制备10微米以下的聚合物颗粒.
创建稳定且易于处理的微塑料模仿各种商业塑料.
为了研究这些准备好的微粒的有氧生物降解.

主要方法:

采用单工艺,从PET,PLA,聚碳酸和PCL中合成聚乙烯甘醇 (MPEG) 稳定颗粒.
该方法适用于不稳定的PET和更大的聚乙烯 (PE) 基颗粒.
对精选的稳定和非稳定微粒进行了有氧生物降解研究.

主要成果:

成功制备了PET,PLA,聚碳酸和PCL的10微米以下的颗粒,并且很容易在水中重新悬浮.
所有测试的粒子都显示出一定程度的有氧生物降解.
PLA和PET颗粒的降解主要归因于MPEG稳定组,而不是聚合物骨干.
PCL颗粒的降解速度很快,符合文献和它们的小尺寸.
基于PE的颗粒显示出比单独稳定组预期的更多的降解,这表明表面化学影响了散装降解.

结论:

开发的方法为环境研究提供了模仿微塑料的多功能途径.
在这种情况下,聚合物降解受到稳定剂,固有的聚合物特性和颗粒表面特征的影响.
对PE微粒表面化学的进一步研究是有必要的,以了解它们的降解行为.

更多相关视频

Synthesis of Monodisperse Cylindrical Nanoparticles via Crystallization-driven Self-assembly of Biodegradable Block Copolymers

Synthesis of Monodisperse Cylindrical Nanoparticles via Crystallization-driven Self-assembly of Biodegradable Block Copolymers

Published on: June 20, 2019

Forming Micro-and Nano-Plastics from Agricultural Plastic Films for Employment in Fundamental Research Studies

Forming Micro-and Nano-Plastics from Agricultural Plastic Films for Employment in Fundamental Research Studies

Published on: July 27, 2022

相关概念视频

Bioplastics

Bioplastics

Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...

Microbial Bioremediation of Plastics

Microbial Bioremediation of Plastics

Polyethylene terephthalate (PET) is a synthetic polymer widely utilized in the packaging industry, particularly for bottles and containers. Due to its chemical stability and durability, PET accumulates in the environment, contributing significantly to plastic pollution. It comprises repeating units of terephthalic acid and ethylene glycol, resulting in a semi-crystalline structure that is resistant to natural degradation processes.A notable breakthrough in plastic biodegradation came with the...