目的 针对塑料污染危机及现有包装材料瓶颈,响应“以纸代塑”战略,本文通过纤维结构调控-光固化体系设计-成型工艺优化的协同路径,开发出疏水纤维素透明膜,并一体化制备可降解镭射膜。方法 以漂白桉木硫酸盐浆（BEKP）为基材,经PFI打浆优化（15 000 转,打浆度为30°R~40°R）构建基纸;采用丙烯酸异辛酯（EHA）-二丙烯酸1,6-己二醇酯（HDDA）-环氧大豆油丙烯酸酯（AESO）复配光固化体系（固化折射率为1.48）。结果 制备透明膜综合性能优异：透明度为88.9%、雾度为18.4%,最大拉伸应力为53.1 MPa,疏水角为105.8°,理论生物基碳含量为72%,80 d土壤掩埋降解率为60.2%。依托工艺兼容性,通过提升浸渍液保有量、以聚对苯二甲酸乙二醇酯（PET）转铝膜替代离型膜,实现铝层与微结构共形转移,且PET转铝膜可回收复用。结论 该可降解镭射膜成功应用于烟盒包装,破解传统镭射转移纸“爆色”、剥落、阻隔性不足的核心痛点,简化流程并降低能耗,在绿色烟酒、防伪包装领域具有广阔应用前景。
Abstract
To address plastic pollution and bottlenecks of existing packaging materials and respond to the "replace plastic with paper" strategy, the work aims to develop a hydrophobic cellulose transparent film and integrally prepare a degradable laser holographic film via synergistic optimization of fiber structure, photocuring system and molding process. With bleached eucalyptus kraft pulp (BEKP) as the substrate, base paper was fabricated with optimized PFI beating (15 000 revolutions, beating degree 30°R-40°R). A composite photocuring system of 2-ethylhexyl acrylate (EHA), 1,6-hexanediol diacrylate (HDDA) and acrylated epoxidized soybean oil (AESO) was adopted. The transparent film showed excellent performance of transparency 88.9%, haze 18.4%, maximum tensile strength 53.1 MPa, water contact angle 105.8°, theoretical bio-based content 72%, and 60.2% degradation rate after 80-day soil burial. By increasing impregnating solution retention and replacing release films with recyclable PET aluminum-coated films, conformal transfer of aluminum layer and microstructures was realized. The degradable laser holographic film is successfully applied to cigarette packaging, overcoming core drawbacks of traditional laser transfer paper (color cracking, peeling, insufficient barrier property) with simplified process and lower energy consumption, showing broad prospects in green tobacco/alcohol and anti-counterfeiting packaging.
关键词
纤维素 /
丙烯酸酯 /
透明膜 /
镭射膜 /
烟酒包装
Key words
cellulose /
acrylates /
transparent films /
laser holographic films /
tobacco and alcohol packaging
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基金
中央高校基本科研业务费专项资金（2025ZYGXZR103）
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