SYNTHESIS AND PROPERTIES OF LIGNIN-BASED POLYURETHANE HYDROGELS

摘要：

A series of pH-sensitive hydrogels were synthesized from acetic acid lignin by chemical crosslinking with isocyanate group-terminated polyurethane ionomers (IPUI). The swelling ratio of hydrogels increased with pH. The hydrogel prepared at the mass ratio of mAAL/mIPUI: 0.35:1 presented maximum swelling ratio in pH 6.8 buffer solutions. The results of thermo gravimetric analysis demonstrated that the thermal stability of the hydrogels is improved by introduction of lignin.. The data of release experiments for ammonium sulfate suggest that the hydrogels can be used as coating materials to prepare slow release fertilizer.

关键词： hydrogel polyurethane lignin pH-sensitive

作者: Peng Zhiyuan Chen Fangeng Zhou Xuesong

作者单位: State Key Laboratory of Pulp and Paper Engineering,South China University of Technology, Guangzhou,5 State Key Laboratory of Pulp and Paper Engineering,South China University of Technology, Guangzhou,5

会议类型: 国际会议

会议名称: 4th ISETPP(第四届制浆造纸新技术国际研讨会)

会议地点: 广州

会议语种:英文

页码: 181-184

在线出版日期: 2010-11-08（万方平台首次上网日期，不代表论文的发表时间）