非水介质中羧基酯化聚乙烯醇的合成及其在表面施胶中的增强应用

李春艳; 李小瑞; 沈一丁; 李凯斌; 刘一鹤; 党鹏程

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Synthesis of Carboxylic Esterified Polyvinyl Alcohol in Non-aqueous Medium and Its Enhancement Application in Surface Sizing

Received:August 16, 2021

DOI：10.11981/j.issn.1000-6842.2022.02.32

Key Words:non-aqueous media;waterborne;carboxylic esterification;maleic anhydride;surface sizing agent;physical property;ink adhesion

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
LI Chunyan^*	College 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	College 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	College 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 Kaibin	College of Chemistry and Chemical Engineering， Shaanxi University of Science and Technology， Xi'an， Shaanxi Province， 710021 College of Chemical Engineering and Modern Materials， Shangluo University， Shangluo， Shaanxi Province， 726000	726000
LIU Yihe	College 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
DANG Pengcheng	College 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:

Carboxyl esterified polyvinyl alcohol （NWMPA）， a surface sizing agent， was synthsized by modifying low-alcoholysis polyvinyl alcohol （PVA0588） with maleic anhydride （MAH） using N-methyl-2-pyrrolidone （NMP） as solvent and tetrabutylammo-nium bromide as catalyst in this study. The structure of NWMPA was characterized by FT-IR and ¹H-NMR， the effects of mass ratio of PVA0588 to MAH on the carboxyl content and the stability of NWMPA dispersion were analyzed， and the effects of dosage of PVA1799 and NWMPA on the physical properties of the surface-sized paper were discussed. The results showed that when m（PVA0588）∶m（MAH）=2∶1， the NWMPA-3 dispersion was stable with average particle size of 368 nm， dispersion index of 0.418， stability index of 3.802， and iodine value and carboxyl content of 28.55 g/（100 g） and 49.65 mmol/L， respectively. Compared with the base paper， the sizing degree， dry tensile index， wet tensile index， and folding strength of the paper sized with 3.0 wt% NWMPA-3 and 4.0 wt% PVA1799 increased by 1246.5%， 33.6%， 50.6%， and 243.8%， respectively. Compared with the commercial sizing agent， the storage period of time of PVA1799/NWMPA-3 compound sizing agent is longer and its paper ink adhesion grade is evaluated as qualified grade 4B.

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