摘要
对富含纤维素的江蓠提取琼胶后的残渣进行前处理,再加入20倍质量的8%NaOH溶液,经100℃蒸煮2 h便制得江蓠粗纤维素。纤维素经NaOH(质量比3:1)25℃碱化处理45 min后,加入氯乙酸(质量比2.5:1)于65℃进行羧甲基化反应2 h,得到的羧甲基纤维素(CMC)取代度达0.70,红外图谱与试剂CMC相似度高,热分析结果表明实验所得CMC稳定性良好。
Residue from agar production with gracilari is rich cellulose. The residue was dried, ground to pass 20 mesh screen, then the powder was extracted by 20 times mass NaOH of 8% at 100 ℃ for 3 h to prepare crude gracilaria cellulose, the cellulose was alkalized with 2 times mass of NaOH at 25 ℃ for 45 rain. Through carboxy methylation of chloroacetic acid at 65 ℃ for 2 h , sodium carboxymethylcellulose with substituting degree of 0.70 was gained, its IR spectrum agrees with that of CMC reagent.The thermal analysis results show that its thermal stability is good.
出处
《辽宁化工》
CAS
2010年第12期1232-1235,共4页
Liaoning Chemical Industry
