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Preparation and Mechanism of Cross-linked Polyvinyl Alcohol Surface Sizing Agent
Received:March 01, 2022  
DOI：10.11980/j.issn.0254-508X.2022.09.009
Key Words:cross-linking  polyvinyl alcohol  organic coupling group  surface sizing  folding endurance
Fund Project:陕西省科技统筹创新工程重点实验室项目（2013SZS10-Z01）。
Author NameAffiliationPostcode
DANG Pengcheng School of Chemistry and Chemical Engineering， Shaanxi University of Science and Technology， Xi’an， Shaanxi Province， 710021
Key Laboratory of Light Chemical Auxiliary Agents of Shaanxi Province， 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
Key Laboratory of Light Chemical Auxiliary Agents of Shaanxi Province， Xi’an， Shaanxi Province， 710021 		710021
LIU Yihe School of Chemistry and Chemical Engineering， Shaanxi University of Science and Technology， Xi’an， Shaanxi Province， 710021
Key Laboratory of Light Chemical Auxiliary Agents of Shaanxi Province， Xi’an， Shaanxi Province， 710021 		710021
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Abstract:A cross-linked polyvinyl alcohol surface sizing agent （PVA-KH560） was prepared by grafting and modifying polyvinyl alcohol （PVA1799） using γ-glycidyl ether oxypropyltrimethoxysilane （KH560）.The structure and stability of PVA-KH560 were analyzed by Fourier transform infrared spectroscopy， hydrogen nuclear magnetic resonance spectroscopy， and stability tests， and the physical properties of papers before and after sizing by the compound agent of PVA-KH560 and PVA1799 were compared. The results showed that the epoxy group of KH560 disappeared in PVA-KH560， and the silicon-containing branch chain was successfully grafted into the PVA1799 long chain. When m （PVA1799）∶m （KH560） was 9∶1.5， the PVA-KH560 dispersion was stable and had the smallest particle size （122.2 nm）， and the PDI index was 0.291. Compared with the base paper， the folding endurance， tensile index， stiffness， tearing index， and bursting index， and contact angle of the compound-agent sized paper increased by 436.0%， 60.1%， 116.4%， 89.9%， 80.5%， and 57.7%， respectively， showing an improved comprehensive performance compared with the PVA1799 sized paper.
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