摘要
为了改善纤维素基气凝胶(CCA)在水中的形态稳定性和吸附能力,分别选取戊二醛、1,2,3,4-丁烷四羧酸(BTCA)和柠檬酸(CA)对CCA进行改性。结果表明:当交联剂质量分数小于15%(omf)时,孔隙率对吸附起主导作用;当交联剂质量分数增加至25%(omf)时,羧基含量对吸附起主导作用;当交联剂质量分数大于25%(omf)时,孔隙率和羧基利用率均降低,改性CCA吸附能力降低。当BTCA和CA质量分数分别为20%(omf)和25%(omf)时,CCA吸附能力增加的同时能够保持气凝胶在水中的形态稳定,此时,BTCA和CA改性CCA对MB的平衡吸附量分别为657 mg/g和646 mg/g。
To improve the morphological stability and adsorption capacity of cellulose-based aerogel(CCA)in water,glutaraldehyde,1,2,3,4-butanetetracarboxylic acid(BTCA),and citric acid(CA)are selected to modify CCA.The results show that when the amount of cross-linking agent is less than 15%(omf),the porosity plays a leading role in adsorption.When the dosage increases to 25%(omf),the carboxyl group content plays a lead⁃ing role in adsorption.When the dosage is more than 25%(omf),the porosity and carboxyl group utilization rate are reduced,and the adsorption capacity of modified CCA decreases again.When the dosages of BTCA and CA are 20%(omf)and 25%(omf)respectively,the morphological stability of CCA can be maintained in water while the adsorption capacity of CCA is increased.The equilibrium adsorption capacity of BTCA and CA modi⁃fied CCA for MB is 657 mg/g and 646 mg/g,respectively.
作者
巩守家
张翔宇
陈善伟
毛志平
纪柏林
GONG Shoujia;ZHANG Xiangyu;CHEN Shanwei;MAO Zhiping;JI Bolin(College of Chemistry and Chemical Engineering,Donghua University,Shanghai 201620,China;National Engineering Research Center for Dyeing and Finishing of Textiles,Donghua University,Shanghai 201620,China;Key Laboratory of Science&Technology of Eco-Textile,Ministry of Education,Donghua University,Shanghai 201620,China;National Innovation Center of Advanced Dyeing and Finishing Technology,Taian 271000,China;Key Laboratory of Bio-Fibers and Eco-Textiles,Qingdao 266071,China)
出处
《印染》
CAS
北大核心
2023年第2期1-6,共6页
China Dyeing and Finishing
基金
国家自然科学基金青年基金(51803025)
省部共建生物多糖纤维成形与生态纺织国家重点实验室(KF2020213)。
关键词
吸附
气凝胶
羧基纤维素
孔隙率
羧基含量
adsorption
aerogel
carboxyl cellulose
porosity
carboxyl content
