STUDY ON EFFECTS OF DRYING AND SIZING ON MICROSTRUCTURE OF RECYCLED FIBERS
During the repeated recycling process of secondary fibers, the properties of the fibers will change to some extent compared with original fibers. In the subject, the changes of microstructure in recycled fibers treated with different conditions of sizing and drying were studied. The results showed that the effects of drying time and temperature on mesopores of recycled fibers were obvious. When the drying temperature increased from 80 to 100 and from 100 亷 to 120 , the 亷 average pore volumes of mesopores were decreased by 3.22亊10-5 cm3/g and 5.42亊10-5 cm3/g, respectively. When the drying time increased from 10 to 15min, the pore volume corresponding to the pores between 15 and 80 A was decreased to 4.15亊10-5 cm3/g. As the drying time and temperature increased, the fiber pores were closed to a certain extent, causing the WRV to decrease when the crystallinity index increased. Meanwhile, increasing the dosages of AKD, the WRV also decreased and crystallinity index increased gradually. For instance, when the dosage of AKD reached 0.3％, WRV was decreased by 11.2％ and crystallinity index increased by 10.0％ compared with the control sample. However, sizing had a minor effect on fiber pore structure, since there was no obvious change in the fiber porous structure.
recycled fiber drying sizing pore structure WRV crystallinity index
Yang Jing Wan Jinquan
State Key Laboratory of Pulp and Paper Engineering,South China University of Technology, Guangzhou,510640, China
国际会议
广州
英文
1012-1015
2010-11-08（万方平台首次上网日期，不代表论文的发表时间）