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RISS 인기검색어
- 검색키워드
- 저자 : Dagang Miao (검색결과 2 건)
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Gelation Modification of Alginate Nonwoven Fabrics
Jie Liu,Yun Liu,Dagang Miao,Shuying Sui,Chuanjie Zhang,Ping Zhu 한국섬유공학회 2018 Fibers and polymers Vol.19 No.8
Calcium alginate nonwoven fabrics were gelation-modified by two-stage with aqueous HCl solution and then ethanolic NaOH solution. The structure and crystallinity properties of the samples were characterized by FT-IR, SEM, and XRD. The preparation conditions and modification mechanism were investigated. The results indicated that the crystal structure of calcium alginate fibers was destroyed; the crystallinity and calcium ion content decreased after HCl treatment. This resulted from the formation of ester bonds among the hydrolytic molecules after NaOH treatment. The best gel performance was obtained at the HCl concentration of 0.05-0.1 wt% with the NaOH concentration in ethanol of 2-4 mol/l. The liquid absorption of nonwoven alginate fabrics increased by 145 %. The water capability increased by 2673 % after modification, while the thickness, mass per unit area, permeability, and tensile strength of nonwoven alginate fabrics changed little.
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The Application of Atmospheric Plasma for Cotton Fabric Desizing
Xuemei Wang,Hongmei Zhao,Fuxing Chen,Xin Ning,Shaojuan Chen,Qunli Guan,Shouxiang Jiang,Dagang Miao 한국섬유공학회 2019 Fibers and polymers Vol.20 No.11
Production process of cotton fabric involves numerous water and chemical consumptions, causing serious energywaste and environmental problem. In this study, a waterless atmospheric plasma treatment (APT) was applied on cottonfabric to desize the starch coated in the weaving process. Plasma parameters, i.e., plasma voltage, plasma duty cycle andoxygen flow rate, are varied in order to systematically evaluate their influence on fabric physical properties such as theimpurity removal, whiteness, capillary effect, tensile strength and breaking elongation of fabric. Optimal plasma parametersfor oxygen APT were determined, with plasma voltage of 320 V, plasma duty cycle of 60 % and oxygen flow rate of 1000 l/h. The APT desizing method attained comparable fabric performances with the traditional amylase desizing method. The resultswere further supported by the scanning electron microscope (SEM) and Fourier transfer infrared spectroscopy (FTIR)investigations.
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