利用海带废渣制备羧甲基纤维素  

Preparation of Carboxymethyl Cellulose from Kelp Residue

作　　者：贾福强[1,2] 冷凯良[1] 于跃芹[1,2] 

机构地区：[1]中国水产科学研究院黄海水产研究所,山东青岛266071 [2]青岛科技大学化学与分子工程学院,山东青岛266042

出　　处：《安徽农业科学》2012年第31期15431-15432,15520,共3页Journal of Anhui Agricultural Sciences

基　　金：公益性行业(农业)科研专项经费(200903030);山东省自然科学基金项目(Y2006B10);青岛市科技计划基础研究项目(09-1-3-33-JCH)

摘　　要：[目的]以海带加工废渣、氯乙酸为原料制备羧甲基纤维素(CMC)。[方法]将海带加工废渣经过水洗、酸煮、碱洗及漂白得到精制原料,以乙醇作溶剂,经过碱化、醚化和中和等步骤得到CMC。并测定其在不同乙醇浓度、碱用量、碱化时间、氯乙酸用量、醚化时间和醚化温度下的取代度。[结果]海带废渣制备羧甲基纤维素的最佳条件为将12.5 g含水量为60%的海带废渣分散于60 ml 85%乙醇溶液中,加入60 ml浓度为20%NaOH溶液,30℃搅拌碱化反应30 min,加入氯乙酸-乙醇溶液(17.5 g的氯乙酸溶于20 ml乙醇),40℃反应30 min,升温至70℃继续搅拌反应2 h,稀HCl中和,抽滤,乙醇洗涤,烘干后得到羧甲基纤维素。在最佳条件下合成羧甲基纤维素的取代度为0.62。[结论]该研究可扩展海带废渣的应用领域,合理利用废弃资源减少环境污染。[Objective] To prepare arboxymethyl cellulose（CMC） by kelp residue and chloroacetice acid.[Method] Through water wash,acid digestion,alkali and bleached to prepare raw material from kelp residue.With ethanol as solvent,after steps of alkalization,etherification and neutralization,CMC was obtained.The degree of substitution（DS） was measured under the conditions of different ethanol concentration,amount of alkali,alkalization time,chloroacetic acid dosage,etherification time and temperature.[Result] The reaction conditions were determined by some single factorial experiments.The results indicated that the optimum conditions are as follows： 12.5 g kelp residue was dispersed in 60 ml of 85% ethanol,60 ml 20% NaOH was added slowly into the solutions,the mixture was left under stirring for 60 min at 30 ℃.Then 17.5 g chloroacetic acid dissolved in 20 ml ethanol was added,the mixture was allowed to react under stirring for 30 min at 40 ℃,then 70 ℃ for 2 h.The mixture was neutralized with the dilute hydrochloric,filtered,washed with ethanol,and dried.The DS of CMC was about 0.62 under the optimum conditions.[Conclusion] The study could extend application field of kelp residue and properly utilize waste resource,reduce environmental pollution.

关 键 词：海带废渣 羧甲基纤维素 取代度 

分 类 号：S946.1[农业科学—水产养殖]