Welcome to Biomass Chemical Engineering,

Biomass Chemical Engineering ›› 2019, Vol. 53 ›› Issue (4): 31-36.doi: 10.3969/j.issn.1673-5854.2019.04.005

• Research Report • Previous Articles     Next Articles

Effect of Partial Removal of Parenchyma Tissues of Neosinocalamus affinis on Pulping and Bleaching Properties of Chemimechanical Pulp

Hualan ZHANG1,2,Guigan FANG1,*(),Kuizhong SHEN1,2,Yongjun DENG1,2,Xiaoliang LI3,Shanming HAN1   

  1. 1. Institute of Chemical Industry of Forest Products, CAF; National Engineering Lab. for Biomass Chemical Utilization; Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; Key Lab. of Biomass Energy and Material, Jiangsu Province, Nanjing 210042, China
    2. Research Institute of Forestry New Technology, CAF, Beijing 100091, China
    3. Shandong Huatai Paper Group Co., Ltd., Dongying 257335, China
  • Received:2018-04-23 Online:2019-07-30 Published:2019-08-05
  • Contact: Guigan FANG E-mail:fangguigan@icifp.cn
  • Supported by:
    国家重点研发计划资助(2017YFD0601005);中国林科院中央级公益性科研院所基本科研业务费专项资金(CAFYBB2016SY029);山东广饶乐安学者人才工程(无编号)

Abstract:

The microstructure of bamboo chips was destoried by screw extrusion and part of parenchyma tissues were removed by screening. The obtained bamboo chips were impregnated individually by using different chemical impregnation, i.e. alkaline peroxide(AP), caustic soda(AA) and alkaline sodium sulfite(AS) and followed with atmospheric high consistency refining operation, those different chemimechanical pulps(CMP) were bleached with multiple-stage alkaline peroxide bleaching sequence and the bleached chemimechanical pulps(BCMP) were compared their bleach abilities. Results showed that, the chemical compositions of bamboo chips by removing 11.4% parenchyma tissues were significant different from these of initial bamboo chips, for instance, ash content decreased by 38.6%, cellulose content increased by 4.71%. But screw extrusion didn't cause obvious damage to bamboo fiber. AP impregnation could significantly reduce the refining energyconsumption, which was 18% less than that of AA impregnation as the Canadian standard freeness was 300 mL, and improve the bonding strength of CMP. AA impregnation produced pulps with better bulk properties but poor strength, these properties of AS pulps located among AP and AA pulps; by suing the same H2O2 dosage of 8.0%, the optimal alkali dosages of AP, AS and AA impregnation 4.5%, 4.5% and 3.5%, the bleached pulp brightness of 56.8%(ISO) was achieved from AP impregnation process, but only 49.9%(ISO) obtained from AA process.

Key words: bamboo, parenchyma tissues, pulping properties, bleaching properties, pulp strength

CLC Number: