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Influence of Puffing Pretreatment on Fiber Morphology and Pulping Properties of Corn Stalk
  
DOI：10.11980/j.issn.0254-508X.2018.09.004
Key Words:puffed corn stalk  fiber morphology  kraft pulping  pulping property
Fund Project:国家自然科学基金（项目编号31470602，31770628）；山东省重点研发计划（项目编号2016CYJS07A01）；泰山学者工程项目。
Author NameAffiliation
NIU Si-peng State Key Lab of Bio-based Materials and Green Papermaking Co-founded by Shandong and the Ministry of Science and Technology/Key Lab of Pulp & Paper Science and Technology of Education Ministry， Qilu University of Technology(Shandong Academy of Sciences)， Ji’nan， Shandong Province, 250353 
YANG Gui-hua* State Key Lab of Bio-based Materials and Green Papermaking Co-founded by Shandong and the Ministry of Science and Technology/Key Lab of Pulp & Paper Science and Technology of Education Ministry， Qilu University of Technology(Shandong Academy of Sciences)， Ji’nan， Shandong Province, 250353 
CHEN Jia-chuan* State Key Lab of Bio-based Materials and Green Papermaking Co-founded by Shandong and the Ministry of Science and Technology/Key Lab of Pulp & Paper Science and Technology of Education Ministry， Qilu University of Technology(Shandong Academy of Sciences)， Ji’nan， Shandong Province, 250353 
WANG Qiang State Key Lab of Bio-based Materials and Green Papermaking Co-founded by Shandong and the Ministry of Science and Technology/Key Lab of Pulp & Paper Science and Technology of Education Ministry， Qilu University of Technology(Shandong Academy of Sciences)， Ji’nan， Shandong Province, 250353 
JI Xing-xiang State Key Lab of Bio-based Materials and Green Papermaking Co-founded by Shandong and the Ministry of Science and Technology/Key Lab of Pulp & Paper Science and Technology of Education Ministry， Qilu University of Technology(Shandong Academy of Sciences)， Ji’nan， Shandong Province, 250353 
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Abstract:The effects of puffing pretreatment on the fiber morphology， chemical composition and kraft pulping performance of corn stalk were investigated. Results showed that， compared to the corn stalk without unpuffing pretreatment， the cellulose content（nitric acid-ethanol cellulose）of the puffed corn stalk was 39%， increased 20%， while klason lignin(10%)and pentosan(20%)contents were all decreased.The above characteristics were benificial of pulping in a rather mild condition. Finally， a pulp with yield of 42.3%（based on puffed corn stalk）and KMnO4 value of 15.8 was produced under condition of alkali charge of 14%(based on Na2O），sulfidity of 25%， cooking at a maximum temperature of 100℃ for 60 min， and solid to liquid ratio was 1∶6. Under the same cooking condition， compared with the corn straw without puffing pretreatment， the yield of pulp increased by 9.9%， the KMnO4 value decreased by 3.1%， and the tensile index， tear index and burst index respectively decreased by 7.2% and 9.8%， 5.5%．
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