将聚山梨醇酯类非离子表面活性剂作为增塑剂用于高柔韧性聚乳酸配方的新用途

IF 4.7 3区 工程技术 Q2 ENGINEERING, ENVIRONMENTAL
J. J. Gazquez-Navarro, D. Garcia-Sanoguera, R. Balart, D. Garcia-Garcia, J. Gomez-Caturla
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引用次数: 0

摘要

聚山梨醇酯是一种非离子两性有机化合物,广泛用作表面活性剂。它们的分子量在 1200-1400 g mol-1 之间,因此介于单体增塑剂和聚合增塑剂之间。因此,它们有可能兼具两种增塑剂的优点。本研究提出聚乙二醇山梨醇酐单月桂酸酯(Tween® 20)和聚乙二醇单油酸酯(Tween® 80)作为聚乳酸的环境友好型增塑剂,可增强延展性能。在聚乳酸基体中添加 20 wt%的聚山梨醇酯后,断裂伸长率明显增加,从 4.0%(纯聚乳酸)增加到 180% 左右。对于含有 30 wt% Tween® 20 和 30 wt% Tween® 80 的增塑聚乳酸制剂,其玻璃化转变温度(Tg)分别从 61.0 ºC(纯聚乳酸)降至 29.5 ºC 和 36.6 ºC。此外,由于聚山梨醇酯的分子量较高,挥发性不强,因此可以采用传统的挤出和注塑工艺加工聚乳酸,而不会产生增塑剂挥发。这项研究拓宽了聚山梨醇酯的工业应用领域,使其成为具有成本效益、高效和环保的增塑剂,用于生产韧性更强的聚乳酸。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

A New Use of Polysorbate-Type Nonionic Surfactants as Plasticizers for Highly Flexible Poly(lactide) Formulations

A New Use of Polysorbate-Type Nonionic Surfactants as Plasticizers for Highly Flexible Poly(lactide) Formulations

Polysorbates are non-ionic amphiphilic organic compounds, widely used as surfactants. They have a molecular weight in the 1200–1400 g mol−1 range, so they are on the borderline between monomeric and polymeric plasticizers. Therefore, they can potentially provide the benefits of both plasticizer types. In this work, polyethylene glycol sorbitan monolaurate (Tween® 20), and polyethylene glycol monooleate (Tween® 80) are proposed as environmentally friendly plasticizers for PLA with enhanced ductile properties. The addition of 20 wt% of polysorbates into a PLA matrix, leads to a noticeable increase in elongation at break, from 4.0% (neat PLA) up to values around 180%. The plasticization efficiency was assessed by the decrease in the glass transition temperature (Tg), from 61.0 ºC (neat PLA) down to such los values of 29.5 ºC, and 36.6 ºC, for plasticized PLA formulations with 30 wt% Tween® 20, and 30 wt% Tween® 80, respectively. Moreover, due to the high molecular weight of polysorbates, they are not highly volatile, which allows processing PLA by conventional extrusion and injection molding without plasticizer volatilization. This works widens the industrial applications of polysorbates, as cost-effective, highly efficient and environmentally friendly plasticizers for PLA with enhanced toughness.

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来源期刊
Journal of Polymers and the Environment
Journal of Polymers and the Environment 工程技术-高分子科学
CiteScore
9.50
自引率
7.50%
发文量
297
审稿时长
9 months
期刊介绍: The Journal of Polymers and the Environment fills the need for an international forum in this diverse and rapidly expanding field. The journal serves a crucial role for the publication of information from a wide range of disciplines and is a central outlet for the publication of high-quality peer-reviewed original papers, review articles and short communications. The journal is intentionally interdisciplinary in regard to contributions and covers the following subjects - polymers, environmentally degradable polymers, and degradation pathways: biological, photochemical, oxidative and hydrolytic; new environmental materials: derived by chemical and biosynthetic routes; environmental blends and composites; developments in processing and reactive processing of environmental polymers; characterization of environmental materials: mechanical, physical, thermal, rheological, morphological, and others; recyclable polymers and plastics recycling environmental testing: in-laboratory simulations, outdoor exposures, and standardization of methodologies; environmental fate: end products and intermediates of biodegradation; microbiology and enzymology of polymer biodegradation; solid-waste management and public legislation specific to environmental polymers; and other related topics.
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