Work

Reed-based phase change microcapsules/polyurethane foam composites with enhanced thermal storage, mechanical properties, and interfacial compatibility

Year: 2026

Type: article

Abstract: The incorporation of phase change microcapsules (microPCMs) into polyurethane foams (PUFs) for phase change thermal insulation composites (MePCMs-PUFs) is significant for promoting low-carbon building development and mitigating global climate change. However, the interfacial incompatibility between conventional microPCMs and PUFs continues to be a critical factor limiting both the mechanical performance and thermal energy storage capacity of MePCMs-PUFs. In this study, microPCMs with polyurethane shells (RP-MePCMs) and PUFs containing liquefied residue (RP-PUFs) were synthesized from reed-based polyols and subsequently combined to fabricate MePCMs-PUFs. The effects of the core-shell ratio, stirring speed, and shell material ratio on the structure and thermal storage performance of RP-MePCMs were investigated. Additionally, the interfacial compatibility mechanism between RP-MePCMs and RP-PUFs was elucidated. The results demonstrate that RP-MePCMs with a core-shell ratio of 3:1, a stirring speed of 300 rpm, and 25 % reed-based polyol content exhibit superior thermal storage performance ( ∆ H m = 194.1 J/g, ∆ H c = 193.1 J/g), high energy storage efficiency ( E = 88.3 %), and excellent cycling durability. Phytolith in the reed ( Phragmites australis ) enhances the thermal storage performance of RP-MePCMs by improving the thermal conductivity of the shell material and facilitating the crystallization of the core material. Chemical bonding (-OH/-NCO) interactions between RP-MePCMs and RP-PUFs effectively enhance the interfacial compatibility, significantly improving both the foaming ability and thermal storage performance of MePCMs-PUFs ( ∆ H m = 36.12 J/g, ∆ H c = 36.09 J/g). The novel reed-based MePCMs-PUFs contribute to sustainable resource utilization and energy peak shaving and valley filling, showing promising application potential in building and industrial energy conservation.

Source: Industrial Crops and Products

DOI: 10.1016/j.indcrop.2026.122703

Authors: Songlin Wu, Jian Yin, Jinping Zhao, Xianjun Li

Institutions: Central South University of Forestry and Technology, Wuhan Business University

Language: English

Topic: Phase Change Materials Research

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Climate action, Affordable and clean energy

Open Access status: gold

Estimated APC paid: $3,720