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Effect of Hydrothermal Treatment on the Poplar Microstructure and Degradation Products
Received:July 03, 2021  
DOI：10.11980/j.issn.0254-508X.2021.12.003
Key Words:poplar  hydrothermal treatment  micro morphology  process optimization
Fund Project:国家自然科学基金项目（31870566）；山东省泰山学者工程。
Author NameAffiliationPostcode
TIAN Zhongjian State Key Lab of Bio-based Materials and Green Papermaking， Qilu University of Technology （Shandong Academy of Sciences）， Ji’nan， Shandong Province， 250353
Shandong Huatai Paper Co.， Ltd.， Dongying， Shandong Province， 257335
Institute of Chemical Industry of Forestry Products， CAF， Nanjing， Jiangsu Province， 210042 		210042
WU Yan State Key Lab of Bio-based Materials and Green Papermaking， Qilu University of Technology （Shandong Academy of Sciences）， Ji’nan， Shandong Province， 250353 250353
JI Xingxiang* State Key Lab of Bio-based Materials and Green Papermaking， Qilu University of Technology （Shandong Academy of Sciences）， Ji’nan， Shandong Province， 250353 250353
YANG Guihua State Key Lab of Bio-based Materials and Green Papermaking， Qilu University of Technology （Shandong Academy of Sciences）， Ji’nan， Shandong Province， 250353 250353
ZHANG Fengshan Shandong Huatai Paper Co.， Ltd.， Dongying， Shandong Province， 257335 257335
FANG Guigan Institute of Chemical Industry of Forestry Products， CAF， Nanjing， Jiangsu Province， 210042 210042
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Abstract:The effects of different treatment conditions on the content of total xylose， acetic acid and lignin in the poplar hydrothermal treatment liquor and the microstructure of poplar wood chips were discussed. The single factor experiment was used to explore the changing law of the total xylose content in the hydrothermal treatment liquor. The total xylose content was used as an indicator to optimize the poplar hydrothermal treatment conditions via response surface method. The results showed that with the increase of the hydrothermal treatment temperature， the area and number of microscopic pores of the wood chips increased， whereas the number of irregular exfoliation and micro-spherical deposits on the surface of the wood chips also increased. Therefore， the specific surface area of wood chips increased first and then decreased. The total xylose content in the poplar hydrothermal treatment liquor reached the optimal value of 76.54 mg/g with the reaction temperature of 172.51℃， the holding time of 88.14 min， and the solid-liquid ratio of 1 ∶ 6.06. The content of lignin and acetic acid were 34.14 mg/g and 11.28 mg/g， respectively.
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