摘要
通过氢氧化钠-亚氯酸钠法从水稻秸秆中提取纤维素,以水稻秸秆中的纤维素为原料,采用溶解再生-模板法制备出纤维素多孔膜,测试纤维素多孔膜的吸附能力,确保多孔生物基材料的基底,同时对制备的生物基多孔材料官能团组成(FT-IR)、形貌结构(SEM)等进行表征,并对纤维素多孔膜材料进行金属离子宏吸附量的测定.与原始水稻秸秆材料相比,其性能具有明显提高,在处理重金属污染时表现出良好的吸附性,因此,水稻秸秆纤维素多孔膜作为天然吸附剂,在吸附方面具有很大的应用潜力,为制备快速止血-抑菌的生物基新型止血材料提供理论依据.所制备出的纤维素多孔膜对于Cu2+离子的吸附率峰值达到74.6％,相比于原始水稻秸秆高出19.3％,在温度为55 ℃,pH值为7～8之间,吸附效率最好.
Abstract
Cellulose was extracted from rice straw by the method of sodium hydroxide and sodium chlorite.Cellulose in rice straw was used as raw material and porous cellulose membrane was prepared by dissolving and regenerating template method.The adsorption capacity of porous cellulose membrane was tested to ensure the substrate of porous biobased material.At the same time,the functional group composition(FT-IR),morphology and structure(SEM)of the prepared bio-based polyporous materials were characterized,and the macroadsorption capacity of metal ions was determined.Compared with the original rice straw material,its performance has been significantly improved,and it shows good adsorbability when dealing with heavy metal pollution.Therefore,the porous membrane of rice straw cellulose,as a natural adsorbent,has great application potential in adsorption,and provides a theoretical basis for the preparation of a new biobased hemostatic material with rapid hemostasis and bacteriostasis.The peak adsorption rate of the prepared cellulose porous membrane for Cu2+ions reached 74.6％,which was 19.3％higher than that of the original rice straw.The adsorption efficiency was the best when the temperature was 55 ℃ and the pH value was 7～8.
基金项目
贵州师范学院省级大学生创新创业训练计划(S202214223117)
贵州省科技计划(黔科合基础-ZK[2021]一般254)
贵州省教育厅青年科技人才成长项目(黔教合KY字[2022]299)
NETL
NSTL
万方数据