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| Preparation and Application of Self-crosslinking Quaternized Polyethyleneimine Paper Wet Strength Agent |
| Received:June 18, 2021 |
| DOI：10.11981/j.issn.1000-6842.2022.01.22 |
| Key Words:polyethyleneimine;quaternization;self-crosslinking;environmental protection;wet tensile index |
| Fund Project:陕西省科技统筹创新工程重点实验室项目（2013SZS10-Z01）。 |
| Author Name | Affiliation | Postcode | | DANG Yuanyuan* | School of Chemistry and Chemical Engineering， Shaanxi University of Science and Technology， Xi'an， Shaanxi Province， 710021
Shaanxi Provincial Key Laboratory of Light Chemical Additives， Xi'an， Shaanxi Province， 710021 | 710021 | | SHEN Yiding | School of Chemistry and Chemical Engineering， Shaanxi University of Science and Technology， Xi'an， Shaanxi Province， 710021
Shaanxi Provincial Key Laboratory of Light Chemical Additives， Xi'an， Shaanxi Province， 710021 | 710021 | | LI Xiaorui | School of Chemistry and Chemical Engineering， Shaanxi University of Science and Technology， Xi'an， Shaanxi Province， 710021
Shaanxi Provincial Key Laboratory of Light Chemical Additives， Xi'an， Shaanxi Province， 710021 | 710021 | | LIU Yongbing | School of Chemistry and Chemical Engineering， Shaanxi University of Science and Technology， Xi'an， Shaanxi Province， 710021
Shaanxi Provincial Key Laboratory of Light Chemical Additives， Xi'an， Shaanxi Province， 710021 | 710021 |
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| Abstract: |
| Polyethyleneimine （PEI） was modified by 2，3-epoxypropyltrimethylammonium chloride （GTA） and γ-glycidoxypropyltrimethoxysilane （KH560） to obtain a self-crosslinking quaternized polyethyleneimine （MPEI）. It was found that the optimum conditions for preparing MPEI was mass fractions of GTA and KH560 were 2% and 1% （based on PEI quality）， respectively， temperature 50℃， and reaction time 3 h and the as-prepared MPEI was of a solid content of 12%， polymer viscosity of 482.1 mPa·s， and average particle size of 119.6 nm， possessing excellent stability for no gelation was observed after storage at room temperature for 90 days. The structure and properties of MPEI were characterized by FT-IR， TG， viscometer， particle size， and solution stability analyzers， the influence of MPEI with different GTA additions on the physical properties of paper was discussed， and the morphology of paper was observed by SEM as well. The MPEI wet strength agent with a mass fraction of 1.6% （based on the o.d. pulp） was added to pulp to prepare strengthened paper， compared with the base paper， the dry tensile index， wet tensile index， folding endurance， and tearing index of which increased by 34%， 300%， 515%， and 12%， respectively. It is convincing that the as-prepared MPEI does not contain organic chlorine and is a new eco-friendly paper wet strength agent. |
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