| 刘晓庆,王习文,杨进.交联改性苯丙乳液的制备及其在食品包装纸中的应用研究[J].中国造纸,2025,(8):95-103 |
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| 交联改性苯丙乳液的制备及其在食品包装纸中的应用研究 |
| Preparation of Cross-linked Modified Styrene-acrylic Emulsion and Its Application in Food Packaging Paper |
| 收稿日期：2025-02-26 修订日期：2025-03-09 |
| DOI：10.11980/j.issn.0254-508X.2025.08.012 |
| 关键词: 食品包装纸 防水防油 交联改性 苯丙乳液 |
| Key Words:food wrapping paper waterproof and oilproof cross-linked modified styrene-acrylic emulsion |
| 基金项目: |
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| 摘要:本研究以甲基丙烯酸甲酯（MMA）为硬单体，丙烯酸丁酯（BA）为软单体，采用预乳化种子乳液聚合法，在核层加入交联剂N-羟甲基丙烯酰胺/甲基丙烯酸（NMA/MAA），壳层加入苯乙烯（St）制得交联改性核壳型苯丙乳液。将所得乳液涂布在薄页纸上制备阻隔纸。乳液红外光谱证实了MMA、BA、St、NMA/MAA均参与了共聚，且NMA/MAA成功接枝于乳液分子主链；微观形貌表明乳胶粒呈现核壳结构，且粒径分布均匀，粒径约111 nm。使用编号PMBS-NA3乳液（St添加量20%，交联剂添加量0.5%）制备的阻隔纸具有良好的防水性，Cobb1 800吸水值为8.6 g/m2，比使用未改性乳液所制阻隔纸下降约48.5%，并且具有优异的防油性，kit等级达到10级。 |
| Abstract:In this study， methyl methacrylate (MMA) was used as the hard monomer and butyl acrylate (BA) as the soft monomer. The pre-emulsified seed emulsion polymerization method was adopted. The crosslinking agent N-hydroxymethylacrylamide/methacrylic acid (NMA/MAA) was added to the core layer， and styrene (St) was added to the shell layer to prepare the cross-linked modified core-shell styrene-acrylic emulsion. The obtained emulsion was coated onto thin sheet paper to prepare barrier paper.FT-IR spectroscopy confirmed that MMA， BA， St， NMA/MAA all participated in copolymerization. NMA/MAA successfully grafted onto the main chain structure of the emulsion molecule. TEM indicated that the latex particles present a core-shell structure and had a uniform particle size distribution， with a particle size of approximately 111 nm.The barrier paper prepared with PMBS-NA3 emulsion (with St dosage of 20% and crosslinking agent dosage of 0.5%) had good water resistance， Cobb1 800 s water absorption value was 8.6 g /m2， which was approximately 48.5% lower than that of the barrier paper prepared with unmodified emulsion， and had excellent oil resistancd， kit grade reached 10 grade. |
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