Journal
CELLULOSE
Volume 29, Issue 12, Pages 6845-6863Publisher
SPRINGER
DOI: 10.1007/s10570-022-04680-w
Keywords
Polyvinyl alcohol; Ketone hydrazine cross-linking; Surface sizing agent; Folding resistance; Paper
Funding
- National Natural Science Foundation of China [20876093]
- Key Laboratory Project of Science and Technology Co-ordination and Innovation Engineering of Shaanxi Province (China) [2013SZS10-Z01]
- Shangluo Science and Technology Projects [2021-Z-0055]
- Key Scientific Research Projects of Shaanxi Provincial Department of Education [21JS025]
- Natural Science Project of Shangluo University [21SKY001]
- Innovation and Entrepreneurship Training Program for College Students in Shaanxi Province [S202111396057]
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In this study, a novel modified polyvinyl alcohol was used as a sizing agent for paper. By adding various monomers, the cross-linking density and surface hydrophobicity were increased, forming a dense network structure to enhance the bonding force between fibers and improve the performance of the paper.
Herein, a novel modified polyvinyl alcohol(DA-IPVA) used as sizing agent was prepared by using diacetone acrylamide(DAAM)/adipic dihydrazide(ADH) as graft monomer and N-(isobutoxymethyl)acrylamide(IBMA) as self-cross-linking monomer. The effect of the amount of DAAM on the properties of emulsion, film and sizing paper was discussed. The surface micro-structure of the sizing paper was characterized by SEM and AFM. The addition of DAAM/ADH and IBMA endowed DA-IPVA with cross-linked active group and increased cross-linking density and hydrophobicity after ADH was added into the emulsion and the cross-linking structure was formed. The enhancing mechanism of surface sizing agent for paper was revealed. The DA-IPVA can be cross-linked on the surface and inside of the paper to form a dense network structure, which improves the bonding force between the fibers. When the mole fraction of DAAM of the cross-linking monomer is 8%, the surface sizing performance of the paper is obviously improved compared with the base paper. The dry and wet strength is increased by 266.5% and 334.3% respectively, and the folding resistance is increased 2946.67%. This study can have a profound impact on the development of the technology of cross-linking surface sizing agent for paper.
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