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Effect of hollow silica spheres on water vapor permeability of polyacrylate film

机译：中空二氧化硅球对聚丙烯酸酯薄膜水蒸气透过率的影响

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Hollow silica spheres with different hollow size and shell thickness were synthesized via template method using PS spheres as templates and characterized by transmission electron microscopy, scanning electron microscopy, X-ray diffraction and Brunauer-Emmett-Teller analysis. Then the effects of hollow size, shell thickness and content of hollow silica spheres on water vapor permeability of polyacrylate films were investigated. The results showed that hollow silica spheres with smaller hollow size and thinner shell thickness were more conducive to the improvement of water vapor permeability of composite films because they provided more free volume for the composite film. But too small hollow size or too thin shell thickness is unfavorable for water vapor permeability. Also, with the increase of the content of hollow silica spheres, the water vapor permeability of the composite film first increased and then decreased. In short, the composite film containing 2.0 wt% hollow silica spheres with a hollow size of 150 nm and shell thickness of 10 nm showed the best water vapor permeability.
机译：以PS球为模板，通过模板法合成了空心尺寸和壳厚不同的空心二氧化硅球，并通过透射电子显微镜，扫描电子显微镜，X射线衍射和Brunauer-Emmett-Teller分析进行了表征。然后研究了空心尺寸，壳厚度和空心二氧化硅球含量对聚丙烯酸酯薄膜水蒸气透过率的影响。结果表明，空心二氧化硅球的空心尺寸较小，壳厚度较薄，因为它们为复合膜提供了更多的自由体积，因此更有利于提高复合膜的水蒸气透过性。但是太小的空心尺寸或太薄的外壳厚度不利于水蒸气渗透性。另外，随着中空二氧化硅球含量的增加，复合膜的水蒸气透过率首先增加然后降低。简而言之，包含2.0重量％的空心二氧化硅球的复合膜具有150nm的空心尺寸和10nm的壳厚度，显示出最佳的水蒸气渗透性。

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