| 石 岩,张 括,朱雅桐,胡振兴,孙 楠,白苗丽,彭 琳.竹溶解浆的碱预处理及其溶解性能研究[J].中国造纸学报,2017,32(2):12-16 |
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| 竹溶解浆的碱预处理及其溶解性能研究 |
| The Influence of Alkali Pretreatment on the Dissolution of Bamboo Dissolving Pulp in NaOH/Urea System |
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| DOI：10.11981/j.issn.1000-6842.2017.02.12 |
| 中文关键词: 竹溶解浆 溶解 纤维素 预处理 NaOH溶液 |
| Key Words:bamboo dissolving pulp dissolution cellulose pretreatment NaOH solution |
| 基金项目:国家自然科学基金项目（51403156）；天津市应用基础与前沿技术研究计划自然科学基金一般项目(13JCYBJC38800)。 |
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| 中文摘要: |
| 选用聚合度为1228的商品竹溶解浆为原料，通过偏光显微镜、纤维素溶液紫外-可见光（UV-Vis）光谱、动态光散射（DLS）和透射电镜（TEM）分析及溶解率测定研究了经不同浓度NaOH（质量分数1%～12%）预处理后的竹溶解浆在7%NaOH/12%尿素水溶液溶剂体系中的低温溶解行为。结果表明，适宜浓度碱液的预处理提高了纤维素的反应活性及7%NaOH/12%尿素水溶液溶剂对竹溶解浆纤维素的可及度，其中，9% NaOH预处理后的竹溶解浆表现出最佳的溶解效果。 |
| Abstract: |
| Commercial bamboo dissolving pulp with degree polymerization（DP） of 1228 was used as raw material, dissolving behavior in 7%NaOH/12%urea solvent system at lower temperature of bamboo dissolving pulp pretreated by different concentration（1%~12%）of NaOH solution was studied by polar microscopy analysis, UV-Vis spectrum analysis, dynamic light scattering （DLS） and TEM analysis of cellulose solution, and determination of dissolving proportion. The results showed that bamboo dissolved pulp pretreated by 9%NaOH had the best dissolving behavior in 7%NaOH/12%urea aqueous solution, indicating proper concentration of alkali solution pretreatment could improve the reaction activity of cellulose and accessibility of 7%NaOH/12%urea aqueous solution to cellulose of bamboo dissolving pulp． |
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