Documents disponibles écrits par cet auteur

Formation of highly hydrophobic surfaces on cotton and polyester fabrics using silica sol nanoparticles and nonfluorinated alkylsilane / Qinwen Gao in Industrial & engineering chemistry research, Vol. 48 N° 22 (Novembre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 22 (Novembre 2009) . - pp. 9797–9803 Titre : Formation of highly hydrophobic surfaces on cotton and polyester fabrics using silica sol nanoparticles and nonfluorinated alkylsilane Type de document : texte imprimé Auteurs : Qinwen Gao, Auteur ; Quan Zhu, Auteur ; Yuliang Guo, Auteur Année de publication : 2010 Article en page(s) : pp. 9797–9803 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Hydrophobic  surfaces  Textile  fabrics Résumé : Water and soil repellency is one of the most desirable properties for textile fabrics. A surface with a water contact angle higher than 150° is considered to be a practically nonwettable superhydrophobic surface. In this research, we studied the formation of highly hydrophobic surfaces on cotton and polyester fabrics using silica sol formed by hydrolysis and subsequent condensation of tetraethoxysilane under alkaline conditions followed by hydrophobization using hydrolyzed hexadecyltrimethoxysilane (HDTMS). The textile fabrics thus treated showed excellent water repellency with a water contact angle as high as 155° on cotton and 143° on polyester. The high hydrophobicity of the treated fabrics is due to the presence of hydrophobic HDTMS as well as the increase in roughness by silica sol on the surfaces of the treated fabrics. The morphology of the cotton and polyester fabrics were characterized by scanning electron microscopy. We also found that the treated cotton and polyester are resistant to hydrolysis of multiple washing cycles. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9005518 [article] Formation of highly hydrophobic surfaces on cotton and polyester fabrics using silica sol nanoparticles and nonfluorinated alkylsilane [texte imprimé] / Qinwen Gao, Auteur ; Quan Zhu, Auteur ; Yuliang Guo, Auteur . - 2010 . - pp. 9797–9803. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 22 (Novembre 2009) . - pp. 9797–9803 Mots-clés : Hydrophobic  surfaces  Textile  fabrics Résumé : Water and soil repellency is one of the most desirable properties for textile fabrics. A surface with a water contact angle higher than 150° is considered to be a practically nonwettable superhydrophobic surface. In this research, we studied the formation of highly hydrophobic surfaces on cotton and polyester fabrics using silica sol formed by hydrolysis and subsequent condensation of tetraethoxysilane under alkaline conditions followed by hydrophobization using hydrolyzed hexadecyltrimethoxysilane (HDTMS). The textile fabrics thus treated showed excellent water repellency with a water contact angle as high as 155° on cotton and 143° on polyester. The high hydrophobicity of the treated fabrics is due to the presence of hydrophobic HDTMS as well as the increase in roughness by silica sol on the surfaces of the treated fabrics. The morphology of the cotton and polyester fabrics were characterized by scanning electron microscopy. We also found that the treated cotton and polyester are resistant to hydrolysis of multiple washing cycles. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9005518

Modified silica sol coatings for highly hydrophobic cotton and polyester fabrics using a one-step procedure / Quan Zhu in Industrial & engineering chemistry research, Vol. 50 N° 10 (Mai 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 10 (Mai 2011) . - pp. 5881-5888 Titre : Modified silica sol coatings for highly hydrophobic cotton and polyester fabrics using a one-step procedure Type de document : texte imprimé Auteurs : Quan Zhu, Auteur ; Qinwen Gao, Auteur ; Yuliang Guo, Auteur Année de publication : 2011 Article en page(s) : pp. 5881-5888 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Sol  coatings  Highly  hydrophobic  cotton  Polyester Résumé : The applications of water-resistant and stain-resistant finishes to apparel have become widespread in recent years due to high consumer demand. In our previous research, we studied the formation of highly hydrophobic surfaces on cotton and polyester fabrics using a two-step treatment procedure, i.e., first forming silica sol by hydrolysis and subsequent condensation of tetraethoxysilane under alkaline conditions, applying the sol to the surfaces of cotton and polyester fabrics, and then applying hydrolyzed hexadecyltrimethoxysilane on the treated fabrics to impart hydrophobicity to the surfaces of the fabrics. In this research, we developed a novel one-step procedure to form highly hydrophobic surfaces on cotton and polyester fabrics using different modified silica sols. The first series of modified silica sol ("sol A") was prepared by the reactions of a sol formed by alkaline hydrolysis of tetraethoxysilane and alkyltrialkoxysilanes in a NH4OH-ethanol solution. A second series ("sol B") was prepared by the reactions of a sol formed by the same method, followed by adding (3-glycidylosypropyl)trimethoaysilane and alkyltrialkoxysilanes to the sol. The cotton and polyester fabrics treated with the two modified silica sol systems showed excellent water repellency with the water contact angle above 150° on cotton and above 140° on polyester under the optimum treatment conditions. The treated cotton and polyester had significantly improved hydrolysis resistance and maintained high levels of hydrophobicity after 30 laundering cycles. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24158883 [article] Modified silica sol coatings for highly hydrophobic cotton and polyester fabrics using a one-step procedure [texte imprimé] / Quan Zhu, Auteur ; Qinwen Gao, Auteur ; Yuliang Guo, Auteur . - 2011 . - pp. 5881-5888. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 10 (Mai 2011) . - pp. 5881-5888 Mots-clés : Sol  coatings  Highly  hydrophobic  cotton  Polyester Résumé : The applications of water-resistant and stain-resistant finishes to apparel have become widespread in recent years due to high consumer demand. In our previous research, we studied the formation of highly hydrophobic surfaces on cotton and polyester fabrics using a two-step treatment procedure, i.e., first forming silica sol by hydrolysis and subsequent condensation of tetraethoxysilane under alkaline conditions, applying the sol to the surfaces of cotton and polyester fabrics, and then applying hydrolyzed hexadecyltrimethoxysilane on the treated fabrics to impart hydrophobicity to the surfaces of the fabrics. In this research, we developed a novel one-step procedure to form highly hydrophobic surfaces on cotton and polyester fabrics using different modified silica sols. The first series of modified silica sol ("sol A") was prepared by the reactions of a sol formed by alkaline hydrolysis of tetraethoxysilane and alkyltrialkoxysilanes in a NH4OH-ethanol solution. A second series ("sol B") was prepared by the reactions of a sol formed by the same method, followed by adding (3-glycidylosypropyl)trimethoaysilane and alkyltrialkoxysilanes to the sol. The cotton and polyester fabrics treated with the two modified silica sol systems showed excellent water repellency with the water contact angle above 150° on cotton and above 140° on polyester under the optimum treatment conditions. The treated cotton and polyester had significantly improved hydrolysis resistance and maintained high levels of hydrophobicity after 30 laundering cycles. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24158883