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Enhancement of interfacial adhesion and engineering properties of polyvinyl alcohol/polylactic acid laminate films filled with modified microfibrillated cellulose
Prince of Songkla University, Thailand.
Prince of Songkla University, Thailand.
KTH Royal Institute of Technology, Sweden.
RISE Research Institutes of Sweden, Materials and Production, Chemistry, Biomaterials and Textiles.
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2020 (English)In: Journal of plastic film & sheeting (Print), ISSN 8756-0879, E-ISSN 1530-8014Article in journal (Refereed) Epub ahead of print
Abstract [en]

This work was done to improve the interfacial adhesion and engineering performance of polyvinyl alcohol/polylactic acid laminate film by altering the polyvinyl alcohol phase surface properties via incorporating microfibrillated cellulose modified by propionylation. Incorporating the modified microfibrillated cellulose into polyvinyl alcohol film improved adhesion between film layers during the laminating process. Improved peel strength and tensile properties confirmed that modified microfibrillated cellulose can produce better bonding between polyvinyl alcohol and polylactic acid via mechanical interlocking and cohesive forces at the film interface. Modified microfibrillated cellulose (3 wt%) increased the peel strength by 40% comparing with the neat polyvinyl alcohol/polylactic acid laminate film.The reduction of both moisture absorption and diffusion rate of the modified microfibrillated cellulose–polyvinyl alcohol/polylactic acid to 20 and 23%, respectively, also indicated that the modified microfibrillated cellulose could inhibit moisture permeation across the film. This was because the modified microfibrillated cellulose is hydrophobic. Furthermore, the addition of modified microfibrillated cellulose also increased the decomposition temperature of the laminate film up to 10% as observed at 20% of remaining weight, while the storage modulus substantially increasing to 72% relative to the neat laminate film.The superior interfacial adhesion between the polylactic acid and modified microfibrillated cellulose–polyvinyl alcohol layers, observed by scanning electron microscopy, confirmed the improved compatibility between the polyvinyl alcohol and polylactic acid phases. © The Author(s) 2020.

Place, publisher, year, edition, pages
SAGE Publications Ltd , 2020.
Keywords [en]
adhesion, laminate film, microfibrillated cellulose, Polylactic acid, polyvinyl alcohol, thermal analysis, Cellulose, Cellulose films, Cellulose nanocrystals, Moisture, Polyesters, Polyvinyl alcohols, Scanning electron microscopy, Decomposition temperature, Engineering performance, Engineering properties, Interfacial adhesions, Mechanical interlocking, Moisture absorption, Moisture permeation, Nanocellulose
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Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-44769DOI: 10.1177/8756087920915745Scopus ID: 2-s2.0-85083265609OAI: oai:DiVA.org:ri-44769DiVA, id: diva2:1426565
Available from: 2020-04-27 Created: 2020-04-27 Last updated: 2020-04-27Bibliographically approved

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