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| Preparation and Application of Grafted Modified CMC Paper Strength Agent |
| Received:October 28, 2025 Revised:November 23, 2025 |
| DOI：10.11980/j.issn.0254-508X.2026.05.015 |
| Key Words:strength agent graft copolymerization modified CMC enhancement mechanism |
| Fund Project:国家自然科学基金项目（22478234）。 |
| Author Name | Affiliation | Postcode | | YANG Xinghui* | 1School of Chemistry and Chemical Engineering, Shaanxi University of Science ＆ Technology, Xi’an, Shaanxi Province, 710021
2Key Lab of Light Chemical Additives in Shaanxi Province, Xi’an, Shaanxi Province, 710021 | 710021 | | FEI Guiqiang* | 1School of Chemistry and Chemical Engineering, Shaanxi University of Science ＆ Technology, Xi’an, Shaanxi Province, 710021
2Key Lab of Light Chemical Additives in Shaanxi Province, Xi’an, Shaanxi Province, 710021 | 710021 | | LI Zhiyin | 1School of Chemistry and Chemical Engineering, Shaanxi University of Science ＆ Technology, Xi’an, Shaanxi Province, 710021
2Key Lab of Light Chemical Additives in Shaanxi Province, Xi’an, Shaanxi Province, 710021 | 710021 | | YANG Yang | 3Chengdu Banknote Printing Co., Ltd., Chengdu, Sichuan Province, 611130 | 611130 | | XIE Pan* | 1School of Chemistry and Chemical Engineering, Shaanxi University of Science ＆ Technology, Xi’an, Shaanxi Province, 710021
2Key Lab of Light Chemical Additives in Shaanxi Province, Xi’an, Shaanxi Province, 710021 | 710021 |
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| Abstract:This study utilized carboxymethyl cellulose (CMC) as the molecular skeleton and employed a free radical polymerization method， initiated by ammonium persulfate， to graft copolymerize methacryloyloxyethyl trimethyl ammonium chloride (DMC)， acrylamide (AM)， acrylic acid (AA)， and 2-acrylamido-2-methylpropanesulfonic acid (AMPS) to produce a novel CMC graft copolymer (CMC-g-AMPAM) wet-end additive. The impact of AMPS addition amount on the physical and chemical properties of the copolymer and its performance in the pulp slurry was systematically studied.The results showed that at an AMPS addition amount of 6%， the copolymer exhibited optimal rheological characteristics (viscosity of 10.6 mPa·s) and sizing properties. With the CMC-g-AMPAM addition amount of 0.6%， the dry and wet tensile indices of the paper reaching 83.1 and 22.2 N·m/g， respectively， and the folding resistance improved to 248 times， and the tear index reached 6.61 mN·m²/g. |
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