Browsing by Author "Dr. Peter Hauser, Committee Member"

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    Electrostatic Self-assembled Nanolayers on Textile Fibers
    (2006-04-19) Hyde, Gary Kevin; Dr. Lei Qian, Committee Member; Dr. Juan Hinestroza, Committee Chair; Dr. William Oxenham, Committee Member; Dr. Peter Hauser, Committee Member
    This project reports the deposition of nanolayers of poly(sodium 4-styrene sulfonate) (PSS) and poly(allylamine hydrochloride) (PAH) over cotton fibers using the electrostatic self-assembly method (ESA). While glass, silicon wafers, gold coated particles, quartz and mica have dominated the choice of substrates for ESA, the use of textile fibers has been rarely considered. Cotton, in particular, offers a unique challenge to the deposition of nanolayers because of its unique cross section as well as the chemical heterogeneity of its surface. The deposition of the nanolayers involved the preparation of cotton substrates via immersion in 2,3-epoxypropyltrimethylammonium chloride solutions to produce cotton with a high density of cationic groups. The cationic cotton was processed further by repeated sequential dipping into aqueous solutions of PSS and PAH with rinsing between each deposition step. Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy (FTIR), X-ray Photoelectron Spectroscopy (XPS), and Transmission Electron Microscopy (TEM) were used to verify the presence of deposited nanolayers. This research work demonstrates the possibility of using the ESA method to tailor the surface of textile fibers at the molecular level by depositing nanolayers of biocidal, charged nanoparticles, non-reactive dyes, and polyelectrolytes in a controlled manner. Preliminary results indicate that the thickness and sequence of the nanolayers can be controlled to tailor and enhance the selectivity, diffusivity, and permeability of the textile fibers while maintaining their comfort and physical properties.
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    Textile Design Engineering within the Product Shape
    (2008-12-04) Parrillo-Chapman, Lisa; Dr. Traci Lamar, Committee Member; Dr. Trevor J. Little, Committee Chair; Nancy Powell, Committee Member; Dr. Peter Hauser, Committee Member
    This body of research seeks to improve the design and development of a class of products referred to as engineered designs. Specifically, the process for textile design engineering within the shape of a product. Textile Design Engineering within the Product Shape is an iterative and often highly collaborative design process. The purpose of this type of engineered design is to i) improve the performance of the product and/or, ii) to improve the aesthetics of the design. Products engineered for aesthetic purposes can create a seamless design by continuing a motif or fabric structure across a seam, dart or closure, and accentuate shape or movement. Products engineered for functional purposes can improve performance, comfort, fit, and movement, reduce waste, and reinforce areas of high wear. Expert practitioners from industry, academia, and research institutes were surveyed on their use of engineered design. In addition, case study analysis was conducted on the engineered design process. Results from the survey and case study analysis assisted with building a four stage process model. The research uncovered a need for increased input from designers and the need for improved communication and collaboration between members of design and product development teams. New and emerging technologies such as digital printing, integral knitting, and 2D and 3D simulation software facilitate the engineered design process; however, these technologies are underutilized.