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.

本文以双丙酮丙烯酰胺（DAAM）/己二酸二酰肼（ADH）为接枝单体，N-（异丁氧基甲基）丙烯酰胺（IBMA）为自交联剂，制备了一种新型改性聚乙烯醇（DA-IPVA）作为施胶剂。单体。讨论了DAAM用量对乳液、薄膜和施胶纸性能的影响。通过SEM和AFM对施胶纸的表面微观结构进行了表征。DAAM/ADH和IBMA的加入赋予DA-IPVA交联活性基团，在ADH加入乳液并形成交联结构后，交联密度和疏水性增加。揭示了纸张表面施胶剂的增强机理。DA-IPVA可以在纸张表面和内部交联形成致密的网络结构，从而提高纤维之间的结合力。当交联单体DAAM的摩尔分数为8%时，纸的表面施胶性能较原纸有明显提高。干湿强度分别提高266.5%和334.3%，抗折强度提高2946.67%。该研究对纸用交联表面施胶剂技术的发展具有深远的影响。