响应面法优化三醋酸纤维素合成工艺的研究  

Optimization on synthesis of cellulose triacetate by using response surface methodology

作　　者：袁璐璇 康菡子 王彦博 蒋文伟[1] YUAN Lu-xuan;KANG Han-zi;WANG Yan-bo;JIANG Wen-wei(School of Chemical Engineering,Sichuan University,Chengdu 610207,China)

机构地区：[1]四川大学化学工程学院,四川成都610207

出　　处：《现代化工》2021年第12期175-179,共5页Modern Chemical Industry

摘　　要：以瓦楞纸箱为原料成功地合成了三醋酸纤维素(CTA),并利用响应面分析法对合成工艺进行优化。将处理后的纸箱纤维为原料,以乙酸酐为乙酰基供体、乙酸为溶剂、硫酸为催化剂,通过均相乙酰化反应合成了CTA。探究了乙酸、乙酸酐和催化剂的浓度以及反应时间对三醋酸纤维素收率的影响,并结合响应面分析法得到最佳反应条件:硫酸与纤维素的质量比为0.21∶1、乙酸酐与纤维素质量比为5.5∶1、乙酸与纤维素质量比为20∶1、反应时间为6.2 h、反应温度为60℃。最佳反应条件下制得的CTA取代度为2.94,收率为81.03%。Cellulose triacetate(CTA)is successfully synthesized from spent corrugated cardboard boxes to realize the recycling.The synthesis process is optimized by response surface analysis.CTA is synthesized via homogeneous acetylation reaction by using the treated box fibers as feedstocks,with acetic anhydride as acetyl donor,acetic acid as solvent and sulfuric acid as catalyst.The impacts of the concentrations of acetic acid,acetic anhydride and catalyst,and reaction time on the yield of cellulose triacetate are explored.Combining with response surface analysis,the optimum reaction conditions are obtained that the mass ratio of sulfuric acid to cellulose is 0.21∶1,the mass ratio of acetic anhydride to cellulose is 5.5∶1,the mass ratio of acetic acid to cellulose is 20∶1,the reaction lasts for 6.2 h,and the reaction temperature is at 60℃.CTA substitution degree reaches 2.94 and the yield of CTA reaches 81.03%under the optimal conditions.

关 键 词：三醋酸纤维素 瓦楞纸箱 合成 响应面法 

分 类 号：O633.14[理学—高分子化学]