Study of polyamine species modulating the properties of polyurea microencapsulated wall materials
Year: 2025
Type: conference-paper
Abstract: This study explored the impact of various polyamines on polyurea shell performance and identified optimal candidates for high-performance microcapsules. Isophorone diisocyanate (IPDI) was combined with six polyamines (EDA, DAB, HMD, PPD, DETA, and TETA) to synthesize crosslinked polyurea shells via solvent-assisted precipitation polymerization. The polyurea coatings were characterized using ultraviolet-visible spectrophotometry, SEM, FTIR, X-ray diffraction, and thermogravimetric analysis to assess polymerization, microstructure, composition, and crystallinity. Results showed that polyamine type significantly influenced polyurea properties. Diamine-based polyureas had higher initial thermal stability, while triamine (DETA) and tetraamine (TETA) coatings exhibited better thermal degradation resistance. Tri-and tetraamine-based coatings also had uniform spherical morphologies and lower crystallinity, with TETA-derived polyurea demonstrating excellent thermal stability and low crystallinity, making it ideal for high-performance microcapsules. These findings guide the selection of suitable polyurea coatings for microcapsule applications, advancing phase change material technology.
Authors: Yongjun He, Jingyun Feng, Xin Yi, Furu Kang, Jun Deng
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4407768637