环境友好高吸水纤维素海绵的制备及影响工艺
发布时间：2019-06-04 21:47
【摘要】：NaOH/尿素水溶液体系低温溶解纤维素法是一种环境友好、低成本的纤维素溶解方法。文中以NaOH/尿素水溶液为溶剂体系,微晶纤维素为原料,无水硫酸钠为成孔剂、精梳棉为增强纤维,利用冷冻法溶解微晶纤维素成功制备了具有高吸水性能的纤维素海绵。通过扫描电子显微镜、电子万能材料试验机及差重法分析了微晶纤维素浓度、增强纤维浓度、成孔剂浓度以及成孔剂颗粒大小对纤维素海绵形态结构、密度、拉伸强度及吸水率的影响。研究结果表明,微晶纤维素质量浓度、增强纤维质量浓度、成孔剂浓度以及成孔剂颗粒的大小是影响纤维素海绵性能的主要因素。当纤维素添加量为m(纤维素)/m(S)=6/100,增强纤维添加量为m(增强纤维)/m(S)=3/100,成孔剂添加量为m(成孔剂)/m(S)=140/100,成孔剂的粒径在0.125~0.18mm时,纤维素海绵的综合性能较好,其形态均匀,吸水性可以达到900%以上。
[Abstract]:The low temperature dissolution cellulose method of NaOH/ urea aqueous solution system is an environmentally friendly and low cost cellulose dissolution method. In this paper, using NaOH/ urea aqueous solution as solvent system, microcrystal cellulose as raw material, anhydrous sodium sulfate as pore forming agent and combed cotton as reinforcing fiber, cellulose sponge with high water absorption was successfully prepared by dissolving microcrystalline cellulose by freezing method. The morphological structure and density of cellulose sponge were analyzed by scanning electron microscope, electronic universal material testing machine and differential weight method. Effect of tensile strength and water absorption. The results show that the mass concentration of microcrystal cellulose, the mass concentration of reinforced fiber, the concentration of pore forming agent and the size of pore forming agent particles are the main factors affecting the properties of cellulose sponge. When the amount of cellulose is m (cellulose) / m (S) = 6 鈮，
本文编号：2493026
[Abstract]:The low temperature dissolution cellulose method of NaOH/ urea aqueous solution system is an environmentally friendly and low cost cellulose dissolution method. In this paper, using NaOH/ urea aqueous solution as solvent system, microcrystal cellulose as raw material, anhydrous sodium sulfate as pore forming agent and combed cotton as reinforcing fiber, cellulose sponge with high water absorption was successfully prepared by dissolving microcrystalline cellulose by freezing method. The morphological structure and density of cellulose sponge were analyzed by scanning electron microscope, electronic universal material testing machine and differential weight method. Effect of tensile strength and water absorption. The results show that the mass concentration of microcrystal cellulose, the mass concentration of reinforced fiber, the concentration of pore forming agent and the size of pore forming agent particles are the main factors affecting the properties of cellulose sponge. When the amount of cellulose is m (cellulose) / m (S) = 6 鈮，
本文编号：2493026
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