▎ 摘　　要

NOVELTY - A composite phase change microcapsule comprises core material including n-alkane and nano carbide, and wall material including polymer of metal oxide or nitride modified polymethyl methacrylate and butyl acrylate. The mass ratio of n-alkane and butyl methacrylate is 3-10:1. USE - Composite phase change microcapsules. ADVANTAGE - The composite phase change microcapsules have high thermal conductivity and phase change enthalpy. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the composite phase change microcapsules, which involves using crosslinking agent, emulsifier and initiator.