The effects of various pulping conditions on crystalline structure of cellulose in cotton linters
The effects of various pulping conditions on crystalline structure of cellulose in cotton linters
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DOI：
10.1016/s0141-3910(03)00157-5
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发表时间：
2003-09-01
影响因子：
5.9
通讯作者：
Kirci, H
中科院分区：
文献类型：
--
作者：
Gümüskaya, E;Usta, M;Kirci, H
本文采用X射线衍射和红外光谱分析方法研究了棉短绒在碱法、硫酸盐法和有机溶剂法制浆过程中纤维素结晶结构的变化。确定了有机溶剂法制浆对棉短绒纤维素结晶结构的影响大于碱法和硫酸盐法制浆。结果表明，有机溶剂法制浆的结晶度和微晶尺寸均高于碱法和硫酸盐法制浆。虽然在所有有机溶剂纸浆样品中测定了纤维素I-α（三斜晶系），但在其他纸浆样品中，仅在130 ℃下获得的硫酸盐纸浆样品中确定了该晶胞结构。结果表明，在蒸煮过程中，除化学助剂外，蒸煮器内的温度和压力对棉短绒纤维素的结晶结构有重要影响。(C)2003 Elsevier Ltd.保留所有权利。
In this study, we investigated that how the crystalline structure of cellulose in cotton linters changed during soda, sulfate and organosolve pulping processes by using X-ray diffraction and FT-IR spectroscopy. It was defined that crystalline structure of cellulose in cotton linters was more effected in organosolve pulping than in soda and sulfate pulping. It was found that the degree of crystallinity and crystallite size were higher in organosolve pulping than in soda and sulfate pulping. While cellulose I-alpha (triclinic) was determined in all organosolve pulp samples, this unit cell structure was defined in only sulfate pulp samples obtained at 130 degreesC among other pulp samples. It was concluded that not only chemical agents, but also temperature and pressure in cooking digester had major effects on crystalline structure of cellulose in cotton linters during cooking. (C) 2003 Elsevier Ltd. All rights reserved.