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Preextraction of Reducing Sugar from Corn Stalk and Its Effect on Pulping
Received:June 29, 2023  
DOI：10.11980/j.issn.0254-508X.2023.10.014
Key Words:corn straw  reducing sugar  acid and alkali-base pretreatment  pulping performance
Fund Project:四川省水利厅科研项目“改性田螺壳生物炭对水中三氯生（TCS）的吸附性能及机理研究”（SKY2019-05）。
Author NameAffiliationPostcode
JI Dingyu* Sichuan Water Conservancy Vocational College， Chongzhou， Sichuan Province， 611231 611231
JIN Qiuye Sichuan Technology & Business College， Dujiangyan， Sichuan Province， 611830 611830
CHEN Siyao Sichuan Water Conservancy Vocational College， Chongzhou， Sichuan Province， 611231 611231
DUAN Qiong Sichuan Technology & Business College， Dujiangyan， Sichuan Province， 611830 611830
LI Siheng Sichuan Water Conservancy Vocational College， Chongzhou， Sichuan Province， 611231 611231
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Abstract:In this paper， the reducing sugar was extracted from corn straw by alkali （NaOH） and acid （HCl） pretreatment. The morphological changes of corn straw before and after pretreatment were observed with scanning electron microscope， and the pulping performance and paper strength of corn straw before and after pretreatment were explored. The results showed that the yield of reducing sugar （Trs） extracted by acid and alkali were 34.2% and 14.5%， respectively， at 150 ℃， 6% of NaOH， 6% of HCl and acid and 120 min of pretreatment time. When the dosage of alkali was 12%， the pulp yield of acid pretreated corn straw was the highest （48.1%）. In addition， after acid and alkali pretreatment， the tear index decreased by 18% and 13%， the tensile index also showed a downward trend， decreased by 28% and 16%， and the break resistance index decreased by 60% and 41%， respectively. Therefore， the loss of hemicellulose in the pretreatment process will lead to a reduction in the paper strength.
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