摘要
以自制甜菜膳食纤维粉为原料,乙醇溶液为溶剂,采用二次加碱法制备高粘度甜菜羧甲基纤维素(CMC),通过正交试验,结果表明,在最佳粘度工艺条件下,即NaOH/AGU摩尔比为2.5,ClCH2COOH/AGU摩尔比为1.5,乙醇质量浓度为75%,碱化醚化温度为35℃,醚化时间为3h,液料比为8∶1(m L/g),可制备出粘度为894.33MPa·s的甜菜羧甲基纤维素产品。
Took sugar beet edible fiber as raw material to prepare carboxymethyl cellulose(CMC) of high viscosity by the method of the alcohol medium and two times added the alkali, the effect of NaOH and monochloroacetic acid consumption, alcohol concentration, temperature,time of reaction and liquid-to-solid ratio on edible fiber of sugar beet carboxy-methylation has been studied. The result indicates that when n(NaOH)/n(AGU)≤2.5 and n(ClCH2COOH)/n(AGU) ≤1.5,the viscosity of product increases when the dose ratio increased. The result also shows that when alcohol concentration is 75%,alkalization and etherification temperature is 35 ℃,etherification time is 3 h and liquid-to-solid ratio is 8∶1,carboxymethyl cellulose has the better viscosity at 894.33 MPa·s.
出处
《保鲜与加工》
CAS
2005年第3期21-23,共3页
Storage and Process
关键词
甜菜纤维素
羧甲基化
工艺
sugar beet cellulose
carboxy-methylation
optimized technology
