Preparation and Properties of Kraft Lignin-N-Isopropyl Acrylamide Hydrogel

BioResources

Shixue Ren¹  Guizhen Fang¹  Guiquan Jiang²  Huachao Luo²  Yanli Ma² 

[1]China

[2]Northeast Forestry University

关键词: Copolymers;    Grafting;    Gels;    Crosslink;   

DOI  :  10.15376/biores.10.2.3507-3519

来源: DOAJ

【 摘 要 】

Kraft lignin was used to prepare kraft lignin-N-isopropyl acrylamide hydrogel (KNIAH). The results indicated that using a 1:2 mass ratio of KL-to-N-isopropyl acrylamide (NIPAM), 48 h reaction time, and 1.5 mL of crosslinking agent yielded KNIAH with the maximum swelling degree (209.3%). The crosslinking reaction was verified by C-N shifting at 1272 cm-1 and increased C=O bonding at 1720 cm-1. KNIAH with a smooth and uniform surface was created. DSC demonstrated that free water combined with KNIAH at 200 °C, after which KNIAH began exothermic decomposition. TGA shows that KNIAH with good performance of heat resistance and degradation. Absorption was maximized at 20 °C; low temperature and neutral solution was conducive to water absorption. Decolorization increased with decreasing concentration and pH value.

【 授权许可】

Unknown