Abstract
Hybrid paper sheets were prepared by applying a thin coating layer of cross-linked polydimethylsiloxane (PDMS) and inorganic particles onto Whatman Grade 1 filter paper substrates. Several coatings with different inorganic particle contents and types were applied onto the paper substrates to investigate the effect of the variation in the coating formulation on the (i) wetting, (ii) water barrier properties, (iii) air barrier properties, (iv) surface roughness, and (v) mechanical properties of the samples. It was revealed that the superhydrophobic hybrid paper sheets with significantly low air permeability and high water barrier properties could be prepared which is an indication that the method proposed can be used for the preparation of packaging materials.
Highlights
Hybrid paper sheets are paper-based composite materials composed of organic and inorganic components, often prepared by modifying the surface of the paper substrate with a coating composed of polymeric and inorganic components
Preparation of the hybrid paper sheets In this study Whatman Grade 1 (WFP) cotton linters paper was used as the paper substrate because it consists of pure cellulose fibers and has the highest number of reactive hydroxyl groups on its surface
The study aims to understand the effect of the coating formulation on the (i) wetting, (ii) water barrier properties, (iii) air barrier properties, (iv) surface roughness, and (v) mechanical properties of the hybrid paper sheets
Summary
Hybrid paper sheets are paper-based composite materials composed of organic and inorganic components, often prepared by modifying the surface of the paper substrate with a coating composed of polymeric and inorganic components. The main component of paper, is the most abundant polysaccharide in nature and is renewable, inexpensive, and biodegradable. It can be obtained from plants (cotton linters, bamboo, flax) as well as wood (softwoods such as spruce or pine, and hardwoods such as poplar, birch or beech) [5]. The fact that cellulose is available from a wide variety of natural sources allows the preparation of papers with quite different morphological, topographic, and chemical properties. Its porous structure and the fact that both the chemistry and topography of its surface can be modified make paper an extremely suitable substrate for designing different hybrid materials that interact with water, water vapor, and air as desired
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