Research on the Graft Copolymerization of EH-lignin with acrylamide

• 作者: Jian Fu Run Fang Xian-Su Cheng Zuan-Bin Zheng
• 来源期刊: 自然科学期刊(英文)
• 学科: 化学
• 关键词: LIGNIN ACRYLAMIDE GRAFT COPOLYMERIZATION DYE Wastewater DECOLORATION
• 年，卷（期）: zrkxqkyw_2009,（1）
• 页码范围: 17-22
• 页数: 6页
• 分类号: O6

摘要

Lignin isolated from enzymatic hydrolyzed corn-stalks (EH-lignin) is a renewable natural polymer noted for its versatility and applicability in a vari-ety of uses. Graft copolymerization of EH-lignin with acrylamide (AM) and the application of this copolymer as a flocculant in dye wastewater treatment were studied in this article. The influ-ences of some factors on yield of copolymer and the grafting ratio were investigated and the structure of EH-lignin/AM graft copolymer was characterized by FT-IR. According to the yield and the grafting ratio, the optimum conditions for graft copolymerization were as follows: initiator K2S2O8-Na2S2O3 with a quantity 3 wt% of EH-lignin, mass ratio of AM to EH-lignin was 2~3, reaction time 4h and temperature at 50℃. It was found that the absorption capacity of graft copolymer to two azo-dyes was enhanced with the increase of grafting ratio. Furthermore, the residue concen-tration of EH-lignin/AM graft copolymer remained in the supernatant after flocculation was much lower than that of pure EH-lignin.