摘要
本研究对预水解硫酸盐溶解浆纤维进行了PFI/超声分步协同处理。结果表明,经PFI/超声协同处理后,溶解浆纤维的表面形貌被破坏,大部分初生壁和次生壁S1层被脱除,比表面积、孔容和孔径变大,针叶木溶解浆孔径从未处理的16.76 nm增大到21.85 nm,阔叶木溶解浆从16.74 nm增大到21.61 nm;纤维形貌特征的变化引起了溶解浆纤维保水值和吸液率显著增加,针叶木和阔叶木溶解浆保水值分别增大205.0%和78.5%。同时纤维素结晶度、特性黏度和分子质量降低。PFI/超声协同处理可以有效改善溶解浆在NMMO溶液中的溶解性能。
A sequential treatment consisting of initial PFI refining,followed by ultrasonic treatment was performed on pre-hydrolyzed sulfate dissolving pulp fibers in this study.The results showed that after the PFI/ultrasonic synergistic treatment,the surface morphology of dissolving pulp fibers was destroyed,most of the primary wall and S1 layer of the secondary wall were removed,and the specific surface area,pore volume,and pore diameter became larger.Softwood dissolving pulp pore diameter increased from 16.76 nm to 21.85 nm from the untreated treatment and from 16.74 nm to 21.61 nm for hardwood dissolving pulp.The changes in fiber morphology characteristics caused a significant increase in the water retention value and absorbency of dissolving pulp fibers.Softwood and hardwood dissolving pulp water retention values increased by 205.0%and 78.5%,respectively,while the cellulose crystallinity,intrinsic viscosity and molecular weight were reduced.The PFI/ultrasonic synergistic treatment could effectively improve the solubility of dissolving pulp in NMMO solution.
作者
张蛟龙
侯磊磊
张红杰
张雪
李海明
ZHANG Jiaolong;HOU Leilei;ZHANG Hongjie;ZHANG Xue;LI Haiming(Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials,Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery,Dalian Polytechnic University,Dalian,Liaoning Province,116034;China National Pulp and Paper Research Institute Co.,Ltd.,Beijing,100102;National Engineering Lab for Pulp and Paper,Beijing,100102)
出处
《中国造纸》
CAS
北大核心
2024年第6期42-50,138,共10页
China Pulp & Paper
基金
国家自然科学基金面上项目(32171727)。
关键词
超声
PFI
溶解浆
NMMO
溶解性能
ultrasound
PFI
dissolving pulp
N-methylmorpholine-N-oxide
solubility property
作者简介
张蛟龙,在读硕士研究生,研究方向:天然植物纤维资源高值化利用;通信作者:张红杰,正高级工程师,博士生导师,研究方向:天然植物纤维资源高值化利用、纤维基绿色包装材料,E-mail:hongjiezhang@cnppri.com;通信作者:李海明,教授,博士生导师,研究方向:天然植物纤维资源高值化利用。E-mail:charley1114@163.com。
