EFFECT OF PRETREATMENT TEMPERATURE ON HYDROGEN PEROXIDE BLEACHING FOR CHEMIMECHANICAL PULPS FROM A BAMBOO SPECIES NEOSINOCALAMUS AFFINIS
Chemimechanical Pulping and bleaching properties of a bamboo species Neosinocalamus affinis (Rendle) Keng f. were reviewed in this paper. The brightness of bleached bamboo chemi-mechanical pulps was usually too low to be used as a furnish in value-added paper products. The effects of various impregnation conditions by using NaOH, Na2SO3 at the temperature of 130oC , 75oC, respectively, on bleaching properties were compared before refining. Single-stage and two-stage hydrogen peroxide bleaching experiments were conducted. Better bleaching response is obtained at the impregnation temperature of 75oC, than 130oC. By using the impregnation of 2％ NaOH at 75oC, bleached bamboo pulps achieve the brightness of more than 67％ ISO by using 10％ hydrogen peroxide single-stage bleaching. Two-stage bleaching responses are some the same as that of single-stage bleaching. At a given hydrogen peroxide application level in single-stage hydrogen peroxide bleaching, the optimal alkali application amount for Neosinocalamus affinis is similar to China fir and Sichuan mulberry, but different from that of Alnus Gremastogyne, which has a higher ratio of alkali to hydrogen peroxide. Bleachability of bamboo species is the worst among the four materials
bamboo mechanical pulping hydrogen peroxide bleaching
Liang Fangmin Shen Kuizhong Fang Guigan Deng Yongjun Li Ping Han Shanming Jiao Jian
Institute of Chemical Industry of Forest Products,Chinese Academy of Forest, Nanjing, 210042, China
国际会议
广州
英文
450-453
2010-11-08（万方平台首次上网日期，不代表论文的发表时间）