Issue 22, 2023

Flexible, antibacterial porous phase change thermal management film prepared by a one-step extrusion casting-foaming method

Abstract

Flexible antibacterial thermal management products with long working duration are highly desirable for personalized healthcare applications, such as thermotherapy. However, the preparation of products that can meet all these requirements is still under development. In this study, we prepared a flexible porous phase change foaming film (PCFF) by a facile one-step extrusion casting-foaming method, in which thermal expansion microspheres (EMs) were used as the foaming agent to foam a poly(styrene-b-(ethylene-co-butylene)-b-styrene (SEBS)/paraffin-based phase change system containing an antibacterial agent-grafted functional polypropylene (ab-PP) masterbatch. The addition of the ab-PP masterbatch not only improved the processability of the blend system but also imparted the PCFF with almost 100% antibacterial rate against both Escherichia coli and Staphylococcus aureus. The phase change of paraffin and presence of abundant pores within the resulting foaming film bestowed the PCFF with excellent long-duration temperature stability. For a stack composed of 5 layers PCFFs with a total thickness of 3.7 mm and mass of only 16.2 g, the duration of temperature decrease from 48 to 35 °C (simulating the thermotherapy temperature for the human body) is longer than 10 minutes. The resultant PCFF exhibited excellent flexibility, antibacterial performance and exothermic ability, which made it a promising prospect in wearable thermotherapy fields.

Graphical abstract: Flexible, antibacterial porous phase change thermal management film prepared by a one-step extrusion casting-foaming method

Supplementary files

Article information

Article type
Paper
Submitted
09 Aug 2023
Accepted
14 Oct 2023
First published
17 Oct 2023
This article is Open Access
Creative Commons BY-NC license

Mater. Adv., 2023,4, 5753-5760

Flexible, antibacterial porous phase change thermal management film prepared by a one-step extrusion casting-foaming method

X. Guo, T. Xing, Y. Huang and J. Feng, Mater. Adv., 2023, 4, 5753 DOI: 10.1039/D3MA00524K

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