世界竹藤通讯2024，Vol.22Issue(6)：1-11,11.DOI:10.12168/sjzttx.2024.08.30.005
杂细胞含量对竹溶解浆烧碱-蒽醌蒸煮及ECF漂白的影响
Effect of Parenchymal Cell Content on Soda-AQ Cooking and ECF Bleaching of Bamboo Dissolving Pulp
摘要
Abstract
With 2-year-old Phyllostachys pubescens as the material,the study uses prehydrolytic sulfate process and defibrination treatment to separate parenchyma cells(PCs)and fiber cells(FCs)and analyze the effect of PC content on SAQ cooking and elemental chlorine-free(ECF)bleaching of bamboo dissolving pulp(BDP)by controlling the different mass rates between PCs and FCs.The results show that,after the Soda-AQ cooking,the yield,α-cellulose,Kappa number,residual alkali and intrinsic viscosity of bamboo pulp decrease significantly with the increase of PC content,while the ash,iron content and whiteness of bamboo pulp increase with the increase of PC content.During ECF bleaching,the BDP's yield,alkali resistance and intrinsic viscosity decrease significantly with the increase of PC content,while its iron content,S10 and S18 increase significantly.No significant changes happen in whiteness,ash and dichloromethane-extracted of the pulp,which indicates that the BDP basically meets the industry standard requirements.To sum up,PCs have greater influence on the process of SAQ than on ECF bleaching process,and the lower the PC content is,the better uniformity and the higher cellulose content the BDP will have.The BDP with less than 10%PC content is suitable for the production of viscose fibers.However,the removal of iron ions and low molecular weight alkali-soluble matters is still the key to the production of BDP for Lyocell fibers.关键词
毛竹/杂细胞/溶解浆/烧碱-蒽醌蒸煮/ECF漂白Key words
Phyllostachys pubescens/parenchyma cells/dissolving pulp/Soda-AQ cooking/ECF bleaching引用本文复制引用
王君玫,廖强,阮基灿,李鸣,徐鼎峰,李星星..杂细胞含量对竹溶解浆烧碱-蒽醌蒸煮及ECF漂白的影响[J].世界竹藤通讯,2024,22(6):1-11,11.基金项目
国家自然科学基金地区项目(52463011 （）
52363012) （）
江西省主要学科学术和技术带头人培养计划—青年人才项目(20212BCJL23048). （20212BCJL23048）
