Fabric Magic

Fabric Magic

Date: unknown
Creator: Elwyn, Robert
Description: A short film examining the strengths of three Milliken-made fabric blends - nylon and wool, orlon and wool, and dacron and wool.
Contributing Partner: UNT Media Library
Effect of Retting on Surface Chemistry and Mechanical Performance Interactions in Natural Fibers for High Performance Polymer Composites

Effect of Retting on Surface Chemistry and Mechanical Performance Interactions in Natural Fibers for High Performance Polymer Composites

Access: Use of this item is restricted to the UNT Community.
Date: May 2013
Creator: Ramesh, Dinesh
Description: Sustainability through replacement of non-renewable fibers with renewable fibers is an ecological need. Impact of transportation costs from South-east Asia on the life cycle analysis of the composite is detrimental. Kenaf is an easily grown crop in America. Farm based processing involves placing the harvested crop in rivers and ponds, where retting of the fibers from the plant (separation into fibers) can take 2 weeks or more. The objective of this thesis is to analyze industrially viable processes for generating fibers and examine their synergistic impact on mechanical performance, surface topography and chemistry for functional composites. Comparison has been made with commercial and conventional retting process, including alkali retting, enzymatic retting, retting in river and pond water (retting occurs by natural microbial population) with controlled microbial retting. The resulting kenaf fibers were characterized by dynamic mechanical analysis (DMA), Raman spectroscopy (FT-Raman), Fourier transform infrared spectroscopy (FT-IR), polarized optical microscopy (POM), X-ray photoelectron spectroscopy (XPS), Scanning electron microscopy (SEM) optical fluorescence microscopy, atomic force microscopy (AFM) and carbohydrate analysis. DMA results showed that pectinase and microbe treated fibers have superior viscoelastic properties compared to alkali retting. XPS, Raman, FT-IR and biochemical analysis indicated that the controlled microbial and pectinase retting was ...
Contributing Partner: UNT Libraries
Tests on built-up airplane struts having initial tension in outside fibers

Tests on built-up airplane struts having initial tension in outside fibers

Date: August 1, 1923
Creator: Schwamb, T A
Description: The conventional airplane strut fails by buckling. The first signs of failure usually are compression cracks on the concave side of bending. It would therefore appear that if an initial tension could be introduced in the outside fibers, this tension would have to be relieved before the compression load could make itself felt.
Contributing Partner: UNT Libraries Government Documents Department
Military Uniforms: Issues Related to the Supply of Flame Resistant Fibers for the Production of Military Uniforms

Military Uniforms: Issues Related to the Supply of Flame Resistant Fibers for the Production of Military Uniforms

Date: June 30, 2011
Creator: United States. Government Accountability Office.
Description: Correspondence issued by the Government Accountability Office with an abstract that begins "Prior to Operation Enduring Freedom and Operation Iraqi Freedom, Department of Defense (DOD) personnel with flame resistant (FR) uniforms were mainly aviators, fuel handlers, and tank crews. With the growing prevalence of the improvised explosive device (IED) threat, all ground forces serving in Iraq and Afghanistan have been exposed to the possibility of fire-related injuries. The Ike Skelton National Defense Authorization Act for Fiscal Year 2011 extended to 2015 the authority to procure fire resistant rayon fiber for the production of uniforms from certain foreign countries, provided by section 829 of the National Defense Authorization Act for Fiscal Year 2008 and originally set to expire in 2013. This letter discusses the briefing developed in response to the requirement in the Ike Skelton National Defense Authorization Act for Fiscal Year 2011 to report on the supply chain for FR fiber for the production of military uniforms. Specifically, the act required GAO to analyze several elements of the supply chain, including the current and anticipated sources of FR rayon fiber; actions DOD has taken to identify alternatives to FR rayon fiber; impediments to the use of such alternatives; and the ...
Contributing Partner: UNT Libraries Government Documents Department
Hemp as an Agricultural Commodity

Hemp as an Agricultural Commodity

Date: July 8, 2005
Creator: Rawson, Jean M
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Hemp as an Agricultural Commodity

Hemp as an Agricultural Commodity

Date: January 5, 2005
Creator: Rawson, Jean M
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Identification and quantification of lipid metabolites in cotton fibers: Reconciliation with metabolic pathway predictions from DNA databases.

Identification and quantification of lipid metabolites in cotton fibers: Reconciliation with metabolic pathway predictions from DNA databases.

Date: May 2004
Creator: Wanjie, Sylvia W.
Description: The lipid composition of cotton (Gossypium hirsutum, L) fibers was determined. Fatty acid profiles revealed that linolenate and palmitate were the most abundant fatty acids present in fiber cells. Phosphatidylcholine was the predominant lipid class in fiber cells, while phosphatidylethanolamine, phosphatidylinositol and digalactosyldiacylglycerol were also prevalent. An unusually high amount of phosphatidic acid was observed in frozen cotton fibers. Phospholipase D activity assays revealed that this enzyme readily hydrolyzed radioactive phosphatidylcholine into phosphatidic acid. A profile of expressed sequence tags (ESTs) for genes involved in lipid metabolism in cotton fibers was also obtained. This EST profile along with our lipid metabolite data was used to predict lipid metabolic pathways in cotton fiber cells.
Contributing Partner: UNT Libraries
Roselle: Its Culture and Uses

Roselle: Its Culture and Uses

Date: 1907
Creator: Wester, P. J. (Peter Johnson), 1877-1931
Description: Report discussing and promoting the cultivation of the roselle plant -- a species of hibiscus -- in the United States. Topics discussed include varieties of roselle, helpful fertilizers, harvesting practices, uses, and common diseases and insect enemies.
Contributing Partner: UNT Libraries Government Documents Department
Applications of nanomanipulation coupled to nanospray mass spectrometry in trace fiber analysis and cellular lipid analysis.

Applications of nanomanipulation coupled to nanospray mass spectrometry in trace fiber analysis and cellular lipid analysis.

Date: December 2008
Creator: Ledbetter, Nicole
Description: The novel instrumentation of nanomanipulation coupled to nanospray mass spectrometry and its applications are presented. The nanomanipulator has the resolution of 10nm step sizes allowing for specific fine movement used to probe and characterize objects of interest. Nanospray mass spectrometry only needs a minimum sample volume of 300nl and a minimum sample size of 300attograms to analyze an analyte making it the ideal instrument to couple to nanomanipulation. The nanomanipulator is mounted to an inverted microscope and consists of 4 nano-positioners; these nano-positioners hold end-effectors and other tools used for manipulation. This original coupling has been used to enhance the current abilities of cellular probing and trace fiber analysis. Experiments have been performed to demonstrate the functionality of this instrument and its capabilities. Histidine and caffeine have been sampled directly from single fibers and analyzed. Lipid bodies from cotton seeds have been sampled indirectly and analyzed. The few applications demonstrated are only the beginning of nanomanipulation coupled to nanospray mass spectrometry and the possible applications are numerous especially with the ability to design and fabricate new end-effectors with unique abilities. Future study will be done to further the applications in direct cellular probing including toxicology studies and organelle analysis of ...
Contributing Partner: UNT Libraries
Optical Transparent Pmma Composite Reinforced By Coaxial Electrospun Pan Hollow Nanofibers

Optical Transparent Pmma Composite Reinforced By Coaxial Electrospun Pan Hollow Nanofibers

Date: May 2013
Creator: Antoine, Donley
Description: Electrospinning has been recognized as an efficient technique for the fabrication of polymer fibers. These electrospun fibers have many applications across a broad range of industries. In this research, optical transparent composites were successfully fabricated by embedding polyacrylonitrile (PAN) hollow nanofibers into poly (methyl methacrylate) (PMMA) matrix. The hollow PAN nanofibers were prepared by coaxial electrospinning. The PAN was used as the shell solution, and the mineral oil was used as the core solution. The resulting fibers were then etched with octane to remove the mineral oil from the core. The hollow PAN fibers were then homogeneously distributed in PMMA resins to fabricate the composite. The morphology, transmittance and mechanical properties of the PAN/PMMA composite were then characterized with an ESEM, TEM, tensile testing machine, UV-vis spectrometer and KD2 Pro Decagon device. The results indicated that the hollow nanofibers have relatively uniform size with one-dimensional texture at the walls. The embedded PAN hollow nanofibers significantly enhanced the tensile stress and the Young's modulus of the composite (increased by 58.3% and 50.4%, respectively), while having little influence on the light transmittance of the composite. The KD2 Pro device indicated that the thermal conductivity of the PMMA was marginally greater than the ...
Contributing Partner: UNT Libraries
FIRST PREV 1 2 3 4 5 NEXT LAST