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。
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 dis- solving 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.
出处
《中国造纸学报》
CAS
CSCD
北大核心
2017年第2期12-16,共5页
Transactions of China Pulp and Paper
基金
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)
关键词
竹溶解浆
溶解
纤维素
预处理
NAOH溶液
bamboo dissolving pulp
dissolution
cellulose
pretreatment
NaOH solution
