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Effect of TEMPO-oxidized Nanocellulose on Properties of Polyacrylamide Composite Hydrogels
Received:August 27, 2025  Revised:October 25, 2025
DOI：10.11980/j.issn.0254-508X.2026.02.017
Key Words:nanocellulose  polyacrylamide  UV-curing  composite hydrogels  mechanical properties
Fund Project:黑龙江省自然科学基金-优秀青年项目（YQ2023C025）；大学生创新创业训练项目（S202510225395）。
Author NameAffiliationPostcode
GUO Zhengshen* College of Mechanical and Electrical Engineering, Northeast Forestry University, Harbin, Heilongjiang Province, 150040 150040
DONG Youheng College of Mechanical and Electrical Engineering, Northeast Forestry University, Harbin, Heilongjiang Province, 150040 150040
LI Yuhang College of Mechanical and Electrical Engineering, Northeast Forestry University, Harbin, Heilongjiang Province, 150040 150040
WANG Yukang College of Mechanical and Electrical Engineering, Northeast Forestry University, Harbin, Heilongjiang Province, 150040 150040
WANG Quanliang* College of Mechanical and Electrical Engineering, Northeast Forestry University, Harbin, Heilongjiang Province, 150040 150040
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Abstract:TEMPO-oxidized nanocellulose (TOCNF) were introduced into a polyacrylamide/sodium alginate/tannic acid (PAM/SA/TA) system. A nanocellulose reinforced polyacrylamide (TA@TOCNF/PAM/SA) composite hydrogel was prepared by a one-pot combing UV-curing method. The TOCNF addition amount was tuned to strengthen multiple hydrogen-bonding interactions within the network. This strategy improved both mechanical performance and hygrothermal stability. At an optimized TOCNF addition amount of 1.5%， the composite hydrogel reached a tensile strength of 145 kPa and an elongation at break of 227%. The water retention increased up to 75.8% after standing at 25 ℃ for 18 h. After seven consecutive loading-unloading stretching cycles， the elastic recovery remained above 95%， indicating strong fatigue resistance and reliable elastic recovery.
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