摘要
采用醇沉法从桉木APMP(Alkaline Peroxide Mechanical Pulping)废液中提取半纤维素,利用高效液相色谱法对其进行定量、定性分析。以APMP废液中提取的半纤维素为原料,对其进行羧甲基化改性,并探究温度(T)、碱用量(NaOH)和醚化剂用量(ClCH2COOH)对羧甲基半纤维素的取代度(DS)的影响。对半纤维素(HC)和羧甲基半纤维素(CMHC),进行性质表征和生物活性研究,主要是抗氧化性、吸湿、保湿性和抑菌性。结果表明,APMP废液中提取的半纤维素是以木聚糖为主要成分;CMHC的最佳制备工艺条件是,反应时间2 h,反应温度75℃,HC、NaOH和ClCH2COOH的摩尔比为1∶1∶2,取代度最高为1.47;经实验测定,CMHC在抗氧化性、吸湿性、保湿性和抑菌性方面比HC有更好的效果。
Hemicellulose was extracted from eucalyptus APMP(alkaline peroxide mechanical pulping)waste liquor by alcohol precipitation method and quantitative and qualitative analysis was performed by HPLC(high performance liquid chromatography).Using the extracted hemicellulose as a raw material,the carboxymethylation was modified by etherification,and the effects of temperature(T),the amount of alkali(NaOH)and the amount of etherifying agent(ClCH2COOH)on the degree of substitution(DS)were investigated.Characterization and biological activity research of hemicellulose(HC)and carboxymethyl hemicellulose(CMHC),mainly antioxidant,moisture absorption,moisture retention and bacteriostatic were performed.The results show that the main component of hemicellulose extracted from APMP waste liquor was xylan.The optimal preparation conditions for CMHC were reaction time of 2 h,reaction temperature of 75℃,the molar ratio of HC,NaOH and ClCH2COOH of 1∶1∶2,and the highest degree of substitution of 1.47.Determined by experiments,CMHC had better effects on oxidation resistance,hygroscopicity,moisture retention and bacteriostatic than HC.
作者
陈婷
刘海棠
刘婧
李洁
安永贞
张晓晨
CHEN Ting;LIU Haitang;LIU Jing;LI Jie;AN Yongzhen;ZHANG Xiaochen(Tianjin Key Laboratory of Pulp&Paper,Tianjin University of Science and Technology,Tianjin 300457,China;Jiangsu Key Laboratory for Biomass Energy and Material,Jiangsu Province,Nanjing,210042,China;Tianjin Key Laboratory of Marine Resources and Chemistry,Tianjin University of Science&Technology,Tianjin 300457,China)
出处
《功能材料》
EI
CAS
CSCD
北大核心
2020年第5期5020-5026,共7页
Journal of Functional Materials
基金
国家自然科学基金青年科学基金资助项目(31700516)
江苏省生物质能源与材料重点实验室开放基金资助项目(JSBEM201914)
天津市海洋资源与化学重点实验开放基金资助项目(201705)
天津市制浆造纸重点实验室开放基金资助项目(201807)。
关键词
APMP废液
半纤维素
羧甲基化
抗氧化性
吸湿性
保湿性
抑菌性
APMP waste liquor
hemicellulose
carboxymethylation
antioxidant
hygroscopicity
moisture retention
bacteriostatic
