Publication:
Development of the scratch resistance on acrylic sheet with basic colloidal silica (SiO <inf>2</inf>)-methyltrimethoxysilane (MTMS) nanocomposite films by sol-gel technique

dc.contributor.authorRojcharin Chantarachindawongen_US
dc.contributor.authorWasutap Luangtipen_US
dc.contributor.authorPongpan Chindaudomen_US
dc.contributor.authorTanakorn Osotchanen_US
dc.contributor.authorToemsak Srikhirinen_US
dc.contributor.otherMahidol Universityen_US
dc.contributor.otherThailand National Electronics and Computer Technology Centeren_US
dc.date.accessioned2018-06-11T04:41:31Z
dc.date.available2018-06-11T04:41:31Z
dc.date.issued2012-08-01en_US
dc.description.abstractThe formation of scratch-resistant coating film prepared from colloidal silica and a polysiloxane matrix was investigated. Methyltrimethoxysilane (MTMS) was hydrolysed and mixed with silica sol (SiO 2 ) at various compositions to form the hybrid hard-coating nanocomposite film. The hydrolysed MTMS (polysiloxane) acts as the polymeric binder that is covalently linked to the colloidal silica surface and provides adhesion for the scratch resistant coating film to the substrate. The ratio between the polymeric matrix and the SiO 2 nanoparticles was found to play a major role in controlling the coating film appearance and its resistance to scratching. At a SiO 2 content < 30wt.%, the agglomeration of the hydrolysed polysiloxane was observed and caused the opacity of the coating film. At a SiO 2 content > 70wt.%, there was not enough polysiloxane to act as a binder for the SiO 2 , therefore a shrinkage upon solidification of the coating film caused cracking within the nanocomposite film. The optimum ratio was found to be at 40wt.%≤SiO 2 ≤60wt.%, where the films had a transparent, crack free hard coating, with excellent scratch resistance, good adhesion and very good environmental resistance. The nanoindentation revealed that the nanocomposite film, at the optimum loading, possessed a higher strength with a higher SiO 2 loading. Film properties, including hardness, scratch resistance, adhesion and environmental resistance were also examined. The morphology of nanocomposite films was identified by atomic force microscopy (AFM) and scanning electron microscopy (SEM). © 2011 Canadian Society for Chemical Engineering.en_US
dc.identifier.citationCanadian Journal of Chemical Engineering. Vol.90, No.4 (2012), 888-896en_US
dc.identifier.doi10.1002/cjce.21631en_US
dc.identifier.issn1939019Xen_US
dc.identifier.issn00084034en_US
dc.identifier.other2-s2.0-84863548209en_US
dc.identifier.urihttps://repository.li.mahidol.ac.th/handle/20.500.14594/13909
dc.rightsMahidol Universityen_US
dc.rights.holderSCOPUSen_US
dc.source.urihttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84863548209&origin=inwarden_US
dc.subjectChemical Engineeringen_US
dc.titleDevelopment of the scratch resistance on acrylic sheet with basic colloidal silica (SiO <inf>2</inf>)-methyltrimethoxysilane (MTMS) nanocomposite films by sol-gel techniqueen_US
dc.typeArticleen_US
dspace.entity.typePublication
mu.datasource.scopushttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84863548209&origin=inwarden_US

Files

Collections