EFFECTS OF FREEZING TREATMENT ON PAPER PROPERTIES
This study investigated the effects of freezing temperature, frozen-defrosted cycles and freezing storage time on pulp properties, including water retention value, beating degree, cellulose crystallinity, fiber surface characterization and the paper properties. The results showed that with decreasing freezing temperature, increasing frozen-defrosted cycles and freezing storage time, the water retention value and beating degree of pulps decreased but the crystallinity of the pulp increased. The paper properties, such as tightness, tear index, burst index, tensile index, kink index were significantly decreased, whereas light scattering coefficient was remarkably increased. SEM analysis indicated that freezing treatment can reduce fiber crinkle. The water retention value and the beating degree of pulp decreased dramatically as temperature decreased from 4°C to -7°C. The changes became less significant below -7°C. These results provide useful information for further research in pulp freezing and storage.
freezing pulp crystallinity
Chen Qian Song Xianliang Jin Xiaojuan
Engineering Research Center of Forestry Biomass Materials and Bioenergy, Ministry of Education,Beijing Forestry University, Beijing, 100083, China
国际会议
广州
英文
1609-1612
2010-11-08（万方平台首次上网日期，不代表论文的发表时间）