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Novel lightweight and highly thermally insulative silica aerogel-doped poly (vinyl chloride)-coated fabric composite
University of Borås, Faculty of Textiles, Engineering and Business.
University of Borås, Faculty of Textiles, Engineering and Business.
University of Borås, Faculty of Textiles, Engineering and Business.
University of Borås, Faculty of Textiles, Engineering and Business. (Resource Recovery)ORCID iD: 0000-0003-4887-2433
2015 (English)In: Journal of reinforced plastics and composites (Print), ISSN 0731-6844, E-ISSN 1530-7964, Vol. 34, no 19, p. 1581-1592Article in journal (Refereed) Published
Abstract [en]

Novel lightweight and highly thermal insulative aerogel-doped poly(vinyl chloride)-coated fabric composites wereprepared on woven fabrics made of polyester fibres using knife coating method, and their performances were comparedwith neat composite. The composites were prepared by incorporating a commercial aerogel to a ‘green’ poly(vinylchloride) (PVC) plastisol. The effect of aerogel-content, thermal insulating property, thermal degradation, surface characteristics,tensile and physical properties of the composites were investigated. Results revealed that aerogel couldreduce thermal conductivity, density and hydrophilicity of the composites dramatically without significant decrease inother properties. Experimental results showed that thermal insulation properties were enhanced by 26% (from 205 to152 mW/m-K), density decreased by 17% (from 1.132 to 0.941 g/cm3) and hydrophobicity increased by 16.4% (from76.02 to 88.671.48) with respect to the unmodified coated fabric. Analyses proved that composite with 3% aerogel isthe lightest by weight, while 4% showed the highest thermal insulation. The results showed that 4% is the criticalpercentage, and preparation of composites with aerogel content higher than 4% has limitations with the given formulationdue to high viscosity of plastisol. The prepared composite has potential applications in many fields such asdevelopment of textile bioreactors for ethanol/biogas production from waste materials, temporary houses and tents,facade coverings, container linings and tarpaulins. The prepared composite can be considered ‘green’ due to usage of anon-phthalate environment-friendly plasticiser.

Place, publisher, year, edition, pages
2015. Vol. 34, no 19, p. 1581-1592
Keywords [en]
Poly(vinyl chloride)-coated fabric, silica aerogel composite, thermal insulation, lightweight PVC, thermal conductivity coefficient, Knudsen effect, transient plane source, environment-friendly (green) poly(vinyl chloride)
National Category
Industrial Biotechnology
Research subject
Resource Recovery
Identifiers
URN: urn:nbn:se:hb:diva-3733ISI: 000361155500002Scopus ID: 2-s2.0-84945903473OAI: oai:DiVA.org:hb-3733DiVA, id: diva2:877297
Available from: 2015-12-06 Created: 2015-12-06 Last updated: 2020-01-08Bibliographically approved
In thesis
1. Material development of a textile bioreactor: All-polyamide composite for the construction of bioreactors
Open this publication in new window or tab >>Material development of a textile bioreactor: All-polyamide composite for the construction of bioreactors
2019 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Bioreactors are manufactured from stainless/carbon steel, concrete, glass, etc., which are costly and time-consuming to install. Recently, several research studies have been initiated to find cost-efficient materials for constructing bioreactors, one of which is coated textiles. Polyvinyl chloride (PVC)-coated polyester textile (PVCT) has been used for this purpose to make bioreactors more cost-effective and easier to install. In this thesis, the thermal insulation property of PVCT was improved, that enhances the energy efficiency of the process carried out within the bioreactor. However, recycling PVCT is challenging, as it is a mixture of PVC, polyester fabric, a plasticizer for the PVC, chemical linkers, and other processing-aid additives. A possible solution to address these issues is to use a coated textile composed of a single material. The polyester fabric can be replaced with a better performing fabric, such as polyamide, that generally has a longer lifetime as well as higher mechanical stability and is light-weight. A facile method was introduced to make a same-polymer coated textiles composite out of polyamide through the partial dissolution of the fabric’s surface followed by coagulation. The all-polyamide composite coated textiles (APCT) is mechanically stronger and more thermally stable than the PVCT as well as having less weight. Additionally, the APCT is fully recyclable as it contains only a single component. This property can be beneficial for the recyclability of the material. The APCT can be used in the construction of textile bioreactors as well as other applications that require gas-/water-tightness and flexibility at the same time. In addition, a new solvent for polyamide was proposed which can be used for the preparation of the APCT. A computer-assisted theoretical solvent selection method based on the Hansen solubility parameters was also introduced. The findings of this research can increase the economic efficiency of the biofuel production process by decreasing the initial investment. From a technical perspective, the methods introduced in this thesis can encourage researchers in related fields to produce same-polymer composites and find/replace solvent(s) in a more efficient way.

Place, publisher, year, edition, pages
Borås: Högskolan i Borås, 2019
Series
Skrifter från Högskolan i Borås, ISSN 0280-381X ; 94
Keywords
textile bioreactor, biofuel, coated fabric; all-polyamide composite, polyvinyl chloride (PVC), solvent replacement, Hansen solubility parameters (HSPs)
National Category
Materials Chemistry
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-15939 (URN)978-91-88838-28-5 (ISBN)978-91-88838-29-2 (ISBN)
Public defence
2020-01-31, E310, Allégatan 1, Borås, 10:00 (English)
Opponent
Available from: 2020-01-08 Created: 2019-04-02 Last updated: 2020-02-19Bibliographically approved

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Jabbari, MostafaÅkesson, DanSkrifvars, MikaelTaherzadeh, Mohammad J

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