Journal of South China University of Technology(Natural Science Edition) ›› 2012, Vol. 40 ›› Issue (5): 52-57,64.

• Chemistry & Chemical Engineering • Previous Articles     Next Articles

Homogeneous Graft of Acrylic Acid onto Cellulose in Zinc Chloride Aqueous Solution

Ye Dai-yong  Yao Lei   

  1. School of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2011-08-23 Revised:2012-01-13 Online:2012-05-25 Published:2012-03-31
  • Contact: 叶代勇(1972-) ，男，博士，副教授，主要从事绿色精细化学工程研究． E-mail:cedyye@ scut.edu.cn
  • About author:叶代勇(1972-) ，男，博士，副教授，主要从事绿色精细化学工程研究．
  • Supported by:

    广东省自然科学基金资助项目( 07300767)

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Abstract:

The homogeneous graft copolymerization of acrylic acid ( AA) and microcrystalline cellulose ( MCC) was carried out,with potassium persulfate as the initiator and with 65% zinc chloride aqueous solution as the reaction medium. Then,the effects of initiator dosage,initiation time,grafting time and monomer dosage on the grafting ratio were discussed,and the characteristics of the MCC before and after the grafting were analyzed by means of FTIR,XRD and TGA. The results show that,at a initiator-to-MCC mass ratio of 1 : 2,a monomer-to-MCC mass ratio of 5:1 and a initiation time of 10min,the copolymerization at 60℃ for 8 h may result in a grafting ratio of 20.3%,that the size of the grafted copolymer shows a decreasing trend while the potential shows an increasing trend with the prolonging of grafting time,that acrylic acid successfully grafts onto MCC because there exists a C﹦O absorption peak at 1729 cm-1 of the grafted copolymer,and that both the crystallinity and the thermal decomposition temperature of MCC decrease after the grafting.

Key words: microcrystalline cellulose, acrylic acid, homogeneous graft copolymerization, zinc chloride aqueous solution