Durable Non-Fluorine Water-Repellent Fabric Finishing: Surface Treatment Using Silica Nanoparticulates and Mixed Silanes

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dc.contributor.advisor Peter Hauser, Ph.D., Committee Member en_US
dc.contributor.advisor Richard Kotek, Ph.D., Committee Co-Chair en_US
dc.contributor.advisor Stephen Michielsen, Ph.D., Committee Co-Chair en_US
dc.contributor.advisor Xiangwu Zhang, Ph.D., Committee Chair en_US
dc.contributor.advisor Henry Boyter, Jr., Ph.D., Committee Member en_US
dc.contributor.author Roe, Barry Gordon en_US
dc.date.accessioned 2010-04-02T18:17:47Z
dc.date.available 2010-04-02T18:17:47Z
dc.date.issued 2009-04-07 en_US
dc.identifier.other etd-03272008-133830 en_US
dc.identifier.uri http://www.lib.ncsu.edu/resolver/1840.16/2835
dc.description.abstract Due to the cost of processing, materials, and environmental and human hazards, alternatives to fluorine-containing water-repellent finishes have begun to be heavily investigated. One type of chemistry, i.e. surface modification using silica nanoparticles and mixed silanes has recently become of particular interest in the scientific community. 100% cotton fabrics were treated with a combination of silica nanoparticles, silane hydrophobes (such as alkyltrialkoxysilanes), and silane crosslinkers (such as tetraethoxysilane). Fabric samples were prepared using a laboratory-scale dip-dry-cure process. After coating, the performance of the samples was evaluated using a contact angle goniometer. A number of the best performing samples were selected for further investigation, involving durability to laundering and crocking. Results of the work show that surface modification using silica nanoparticles (both hydrophilic and hydrophobic) and mixed silanes was successful; the contact angle values of finished but unwashed samples ranged between 129° and 144°. Fabric samples made using the silane crosslinker tetramethoxysilane, silane hydrophobe ndecyltriethoxysilane, and silica nanoparticles had the highest water contact angle of all samples tested before laundering and crocking. Fabric samples had varying levels of performance after being subjected to laundering and crocking. There was a very notable difference in samples after laundering that were allowed to air dry at laboratory conditions to those that was heat dried at the temperature at which the samples were cured. All samples prepared with the crosslinker bis(triethoxysilyl)ethane showed the best durability to laundering, especially those using solutions that were prepared using an ultrasonic probe. The most durable sample was prepared with an ultrasonicated solution of bis(triethoxysilyl)ethane, noctyltrimethoxysilane, and Aerosil® 90 fumed silica. These samples had an average contact angle of 129.7° before washing (AATCC-type accelerated laundering) and heatdrying and a contact angle of 123.1° after washing and heat-drying. This 94.9% recovery in contact angle shows a lot of promise in the technology that is the focus of this research. en_US
dc.rights I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dis sertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to NC State University or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. en_US
dc.subject fabric finishing en_US
dc.subject nanoparticles en_US
dc.subject silanes en_US
dc.subject silica en_US
dc.subject water repellent en_US
dc.title Durable Non-Fluorine Water-Repellent Fabric Finishing: Surface Treatment Using Silica Nanoparticulates and Mixed Silanes en_US
dc.degree.name MS en_US
dc.degree.level thesis en_US
dc.degree.discipline Textile and Apparel, Technology and Management en_US

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