关键词: 聚合物, 化学反应, 热传导, 纤维素凝胶材料, 溶胶-凝胶法, 催化交联反应

Abstract: Cellulose gelling material with a spatial chemical crosslinking structure was prepared by using natural cellulose as raw material，citric acid as crosslinking agent，trisodium citrate as catalyst through the “cyclic anhydride-esterification” reaction process. The chemical structure and microstructure of the gelling material were characterized，and the performance of the gelling material was studied. Recrystallization occurred in the cellulose macromolecular aggregates when preparing the material. With increasing cellulose initial concentration，the stacking structure of the gelling material became gradually denser and typing characteristics was more obvious. Thermal decomposition temperature was in the range from 280℃ to 350℃；specific heat capacity of the gelling material was 7.564—15.660J/(g?K) and thermal conductivity was 0.43—0.51W/(m?K). Besides，water absorption was in the range from 72.6% to 96.7% and storage modulus was 52.948—162.59MPa. Good heat storage，heat-insulating properties and storage modulus make the gelling material useful in preparing plaminated material.

Key words: polymers, chemical reaction, heat conduction, cellulose gelling material, sol-gel method, catalysis crosslinking reaction