Content:
In order to solve the negative impact of coating on water vapor permeability of leather and overcome the poor water resistance of polyacrylate leather finishing agent, it was proposed that the mesoporous SiO2 spheres with hollow structure instead of traditional surfactant were introduced into polyacrylate by Pickering emulsion polymerization. It was expected to increase the water vapor permeability of
polyacrylate film by increasing the path and shortening the route of water vapor molecules through the film, and improve the water resistance of film by avoiding the use of surfactant.
Hence, stable Pickering emulsion stabilized by mesoporous hollow SiO2 spheres was prepared and its stability was investigated by Turbiscan Lab in this paper. Water vapor permeability, water uptake and
mechanical property of polyacrylate film were also studied. Compared with emulsion stabilized by surfactant, Pickering emulsion indicated excellent stability with lower TSI value of 0.5. Contrasted with
polyacrylate film with SDS, the introduction of mesoporous hollow SiO2 spheres can improve the water vapor permeability of polyacrylate film. Meanwhile, water absorption measurements showed that the
water absorption ratio of the film with mesoporous hollow SiO2 spheres decreased from 112.34 to 40.84%, possessing the ideal ability to water resistance of polyacrylate film. Its film with mesoporous hollow SiO2 spheres also revealed increases of up to 188% in tensile strength and 41.15% in elongation at break. This study can provide a theoretical foundation for designing and synthesizing leather finishing agent with excellent stability, water vapor permeability and water resistance synchronously.
Take-Away:
1. Mesoporous hollow SiO2 spheres stabilized Pickering emulsion exhibits outstanding stability.
2. The introduction of mesoporous hollow SiO2 spheres can improve the water vapor permeability of polyacrylate membrane.
3. Polyacrylate membrane shows excellent water resistance.
| Identifer | oai:union.ndltd.org:DRESDEN/oai:qucosa:de:qucosa:34312 |
| Date | 28 June 2019 |
| Creators | Bao, Yan, Zhang, Yuanxia, Ma, Jianzhong |
| Contributors | International Union of Leather Technologists and Chemists Societies |
| Publisher | Verein für Gerberei-Chemie und -Technik e. V., Forschungsinstitut für Leder und Kunststoffbahnen (FILK) gGmbH |
| Source Sets | Hochschulschriftenserver (HSSS) der SLUB Dresden |
| Language | English |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, doc-type:conferenceObject, info:eu-repo/semantics/conferenceObject, doc-type:Text |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | urn:nbn:de:bsz:14-qucosa2-340872, qucosa:34087 |
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