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Jhong J.-F.,Chung Yuan Christian University | Venault A.,Chung Yuan Christian University | Hou C.-C.,Chung Yuan Christian University | Chen S.-H.,Chung Yuan Christian University | And 4 more authors.
ACS Applied Materials and Interfaces | Year: 2013

Development of bioinert membranes to prevent blood clotting, tissue adhesion, and bacterial attachment is important for the wound healing process. In this work, two wound-contacting membranes of expanded poly(tetrafluoroethylene) (ePTFE) grafted with zwitterionic poly(sulfobetaine methacrylate) (PSBMA) and hydrophilic poly(ethylene glycol) methacrylate (PEGMA) via atmospheric plasma-induced surface copolymerization were studied. The surface grafting chemical structure, hydrophilicity, and hydration capability of the membranes were determined to illustrate the correlations between bioadhesive properties and wound recovery of PEGylated and zwitterionic ePTFE membranes. Bioadhesive properties of the membranes were evaluated by the plasma protein adsorption, platelet activation, blood cell hemolysis, tissue cell adhesion, and bacterial attachment. It was found that the zwitterionic PSBMA-grafted ePTFE membrane presented high hydration capability and exhibited the best nonbioadhesive character in contact with protein solution, human blood, tissue cells, and bacterial medium. This work shows that zwitterionic membrane dressing provides a moist environment, essential for "deep" skin wound healing observed from the animal rat model in vivo and permits a complete recovery after 14 days, with histology of repaired skin similar to that of normal skin tissue. This work suggests that the bioinert nature of grafted PSBMA polymers obtained by controlling grafting structures gives them great potential in the molecular design of antibioadhesive membranes for use in skin tissue regeneration. © 2013 American Chemical Society. Source


Chuang C.-J.,Chung Yuan Christian University | Tung K.-L.,Chung Yuan Christian University | Fan Y.-H.,Chung Yuan Christian University | Ho C.-D.,Tamkang University | Huang J.,Yeu Ming Tai Chemical Industrial Co.
Water Science and Technology | Year: 2010

This paper reports experiments using a flat-sheet module with 0.18 ∼ 0.45 μm ePTFE (expanded polytetrafluoroethylene) and PVDF (polyvinylidene fluoride) membranes to show the effects of membrane properties, salt concentration and fluid hydrodynamics on the permeate flux and salt rejection of DCMD (direct contact membrane distillation). A theoretical prediction of the permeate flux was carried out, and was in close agreement with the experimental results. In addition, the energy integration of the process was also analyzed in order to evaluate module design to increase energy efficiency. According to the simulated results of the energy integration design, a combination of simultaneous cooling of the permeate stream and an additional heat exchanger to lower the temperature of the permeate stream not only enhances the MD flux, but also reduces energy consumption. © IWA Publishing 2010. Source


Venault A.,Chung Yuan Christian University | Chang Y.,Chung Yuan Christian University | Hsu H.-H.,Chung Yuan Christian University | Jhong J.-F.,Chung Yuan Christian University | And 6 more authors.
Journal of Membrane Science | Year: 2013

In this work, the research focus is laid on the preparation of biofouling-resistant expanded poly(tetrafluoroethylene) (ePTFE) membranes via a facile process of atmospheric plasma-induced surface PEGylation. After surface coating of poly(ethylene glycol) methyl ether methacrylate (PEGMA), plasma-induced copolymerization was performed by a new atmospheric plasma treatment process over a short period ranging from 0 to 120s. Controllable grafting and growth of PEGylated copolymer segments with treatment time was ascertained by FT-IR, contact angle, surface roughness, and grafting yield analysis. The grafting yield was enhanced with the plasma treatment duration, evidencing a very good process control. The surface roughness increased until a 60s treatment time, before decreasing owed to saturation of surfaces with grafted copolymer and the obtaining of homogeneous PEGylated layer. The water contact angle dropped from 105±1° for the virgin membrane to 9±1° for the PEGylated ePTFE membrane obtained at a 120s plasma treatment, evidencing superhydrophilic surfaces. The PEGylated ePTFE membranes effectively reduced the adsorption of fibrinogen, a sticky protein, up to 18% the limitation of the virgin membrane. Bacterial attachment owed to Gram-positive bacteria (Staphylococcus epidermidis) and Gram-negative bacteria (Escherichia coli) was also effectively inhibited even after a 24h incubation time from a 60s treatment time, corresponding to a grafting yield of 0.10mg/cm2. This work suggests that the anti-baterial ePTFE membranes grafted with PEGylated layer in sufficient surface coverage, high hydration capability, and efficient grafting time via atmospheric plasma treatment present potential for use in membrane bioreactor applications, for which biofouling is a major issue. © 2013 Elsevier B.V. Source


Trademark
Yeu Ming Tai Chemical Industrial Co. | Date: 2006-09-05

YARN; STAPLE FIBER THREADS; SCRIM YARN; SEWING THREAD; TWISTED AND UNTWISTED YARN; FILAMENT YARN, NAMELY, SOFT PACKING YARN. WOVEN FABRICS MADE OF YARN AND NON-WOVEN FABRICS MADE OF STAPLE FIBERS; KNITTED FABRICS; FELTS; LAMINATED TEXTILE FABRICS FOR MANUFACTURE OF CLOTHING; CHEMICALLY TREATED FIBER FABRICS FOR MANUFACTURE OF CLOTHING, SOCKS AND HATS.


Trademark
Yeu Ming Tai Chemical Industrial Co. | Date: 2007-01-16

Yarn; Staple fiber threads; Scrim yarn; Sewing thread; Twisted and untwisted yarn; Filament yarn, namely, soft packing yarn. Woven fabrics made of yarn and non-woven fabrics made of staple fibers; Chemically treated fiber fabrics for manufacture of clothing, socks and hats; Knitted fabrics; Felts; Laminated textile fabrics for manufacture of clothing.

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