Study on Adsorption Properties of Cellulose Porous Biofilm from Rice Straw
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.
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