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Long-lasting intrinsic polyethylene antifogging films generated by incorporating SiO2 nanoparticles into covalently grafted antifog agents
Journal of Macromolecular Science, Part A ( IF 2.5 ) Pub Date : 2020-07-30 , DOI: 10.1080/10601325.2020.1796493
Xingshi Ge 1, 2, 3 , Ming Chu 1, 2, 3 , Lihang Qu 1 , Jianfu Zhang 1, 2, 3 , Meiyuan Li 1, 2 , Wenfei Li 1, 3 , Zhanhai Yao 2
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Abstract Antifogging films are used in an increasing number of applications in greenhouse cultivation because fog formation affects transmission. Here, we summarize a way to improve the antifogging duration of linear low-density polyethylene (LLDPE) films by controlling the migration of the antifog agent. We prepared SiO2-grafted glycerin monostearate (SiO2-g-GMS) by covalently grafting surface modified SiO2 nanoparticles and glycerin acrylic acid monostearate (GMS-AA). Then, SiO2-g-GMS was added in LLDPE, and antifogging films were prepared for study of their properties. The reaction with modified SiO2 and GMS-AA was demonstrated by Fourier transform infrared spectroscopy, thermogravimetric analysis and grafting degree (GD). The GD of SiO2-g-GMS was approximately 54.95%. Accelerating dripping experiments and contact angle measurements illustrated that GMS-AA-grafted modified SiO2 exhibited delayed migration of the antifog agent, prolonging the antifogging duration by approximately 3 days. We determined that 3 wt% SiO2-g-GMS was a suitable proportion, considering economy and the desired properties. The SEM images indicate that dispersion of SiO2-g-GMS in the film was extensive, and the particle size was 160 ± 40 nm. In addition, the study also showed how modified SiO2 grafted with GMS-AA does not affect the processes and usability of antifogging films. GRAPHICAL ABSTRACT

中文翻译:

通过将 SiO2 纳米粒子掺入共价接枝的防雾剂中而产生持久的本征聚乙烯防雾膜

摘要 由于雾的形成会影响传输,因此防雾膜在温室栽培中的应用越来越多。在这里,我们总结了一种通过控制防雾剂迁移来提高线性低密度聚乙烯 (LLDPE) 薄膜防雾持续时间的方法。我们通过共价接枝表面改性的 SiO2 纳米粒子和甘油丙烯酸单硬脂酸酯 (GMS-AA) 制备了 SiO2 接枝的单硬脂酸甘油酯 (SiO2-g-GMS)。然后,在LLDPE中加入SiO2-g-GMS,制备防雾膜以研究其性能。通过傅里叶变换红外光谱、热重分析和接枝度(GD)证明了改性SiO2和GMS-AA的反应。SiO2-g-GMS 的 GD 约为 54.95%。加速滴落实验和接触角测量表明,GMS-AA 接枝的改性 SiO2 表现出防雾剂的延迟迁移,将防雾持续时间延长了大约 3 天。考虑到经济性和所需的性能,我们确定 3 wt% SiO2-g-GMS 是合适的比例。SEM 图像表明 SiO2-g-GMS 在薄膜中的分散广泛,粒径为 160±40 nm。此外,该研究还表明,接枝 GMS-AA 的改性 SiO2 如何不影响防雾膜的工艺和可用性。图形概要 考虑到经济性和所需的性能。SEM图像表明SiO2-g-GMS在薄膜中分散广泛,粒径为160±40nm。此外,该研究还表明,接枝 GMS-AA 的改性 SiO2 如何不影响防雾膜的工艺和可用性。图形概要 考虑到经济性和所需的性能。SEM 图像表明 SiO2-g-GMS 在薄膜中的分散广泛,粒径为 160±40 nm。此外,该研究还表明,接枝 GMS-AA 的改性 SiO2 如何不影响防雾膜的工艺和可用性。图形概要
更新日期:2020-07-30
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