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Functional Porous Carboxymethyl Cellulose/Cellulose Acetate Composite Microspheres: Preparation Characterization and Application in the Effective Removal of HCN from Cigarette Smoke

机译:功能性多孔羧甲基纤维素/醋酸纤维素复合微球:制备表征和在有效去除香烟烟雾中的六氯化碳中的应用

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摘要

To selectively reduce the yield of hydrogen cyanide (HCN) in the cigarette smoke, functional porous carboxymethyl cellulose/cellulose acetate (CMC/CA) composite microspheres were prepared via the double emulsion-solvent evaporation method. Cupric ions, which have a high complexing ability toward HCN, were introduced to the CMC/CA composite microspheres during the fabrication process via an in situ ion cross-link method. The microspheres were characterized using nitrogen adsorption, mercury intrusion porosimetry, and scanning electron microscopy (SEM). The microspheres have a predominantly macroporous structure indicating weak physisorption properties, but sufficient functional cupric ion groups to selectively adsorb HCN. With these CMC/CA microspheres as filter additives, the smoke yield of HCN could be reduced up to 50%, indicating the great potential of these microspheres as absorbents for removing HCN from cigarette smoke.
机译:为了选择性降低卷烟烟气中氰化氢(HCN)的产率,通过双重乳液-溶剂蒸发法制备了功能性多孔羧甲基纤维素/醋酸纤维素(CMC / CA)复合微球。通过原位离子交联法在制造过程中将对HCN具有高络合能力的铜离子引入CMC / CA复合微球。使用氮吸附,压汞法和扫描电子显微镜(SEM)对微球进行了表征。微球具有主要为大孔的结构,表明较弱的物理吸附性能,但是具有足够的功能性铜离子基团来选择性吸附HCN。使用这些CMC / CA微球作为过滤添加剂,可将HCN的烟气产量降低多达50%,这表明这些微球作为吸收剂从香烟烟雾中去除HCN的巨大潜力。

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