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以竹粉为原料,采用化学方法制备得到球形纤维素,扫描电镜观察球形纤维素粒径均匀,直径约为600μm。通过三因素三水平正交实验研究NaOH溶液添加量、分散相用量和分散剂用量对球形竹纤维素粒径的影响。最佳实验条件为:NaOH溶液添加量为16mL/g、分散相用量为15g和分散剂用量为13%。通过环氧氯丙烷和开链氮杂冠醚化制备得到改性的开链氮杂冠醚化球形竹纤维素。研究了反应温度对接枝改性的影响,反应温度为50℃时,接枝率达到最大值为76.6%。最后研究了改性球形竹纤维素对Cu2+的静态和动态吸附性能,其静力学吸附的饱和吸附容量为97.93mg/g,动力学吸附的有效吸附时间为40min。
Taking bamboo powder as raw material, spherical cellulose was prepared by chemical method. The diameter of spherical cellulose was about 600μm with scanning electron microscope. The effects of NaOH solution dosage, disperse phase dosage and dispersant dosage on the particle size of spherical bamboo cellulose were studied by three-factor and three-level orthogonal experiment. The best experimental conditions are as follows: NaOH solution added at 16mL / g, dispersed phase at 15g and dispersant at 13%. The modified open-chain aza-crown-shaped spherical bamboo cellulose was prepared by epichlorohydrin and open-chain aza-crown etherification. The effects of reaction temperature on the graft modification were studied. The maximum graft ratio reached 76.6% at 50 ℃. Finally, the static and dynamic adsorption properties of modified spherulitic bamboo cellulose to Cu2 + were studied. The static adsorption capacity of static bamboo fiber was 97.93mg / g, and the effective adsorption time of kinetic adsorption was 40min.