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RISS 인기검색어
- 검색키워드
- 저자 : Ke Guizhen (검색결과 3 건)
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Tannic Acid and Ferrous Sulfate Modified Kapok Fiber for Oil-water Separation
Guizhen Ke,Shuhui Chen,Jiani Tang,Huanmin Li,Keshuai Liu 한국섬유공학회 2022 Fibers and polymers Vol.23 No.11
Biodegradable oil absorbing materials have attracted extensive attention in dealing with oil spill pollution. Todevelop more excellent oleophilic oil sorbent, the combination of tannic acid and ferrous sulfate was employed to treat therenewable and biodegradable natural kapok fiber. The as-prepared kapok showed superhydrophobic characteristics with highwater contact for the formation of tannic acid and ferrous ion complex on kapok surface, which was confirmed by scanningelectron microscopy observation and infrared spectroscopy and X-ray diffraction analysis. The preparation process of themodified kapok fiber was optimized. When the sodium chlorite pretreated kapok fiber was firstly treated with 4.25 g/l tannicacid and subsequently immersed in 4.25 g/l tannic acid and 6.25 g/l ferrous sulfate mixture at 60 °C for 15 min, the aspreparedkapok fiber presented the best oil absorption capacity and hydrophobicity (water contact angle 150.7 °). The treatedkapok had good adsorption capacity for oils and organic solvents, 48.2, 41.6, 53.4, 52.8, 49.2, 41.2 g/g for vegetable oil,diesel oil, silicone oil, carbon tetrachloride, DMF and n-hexane, respectively. In addition, the tannic acid and ferrous sulfatetreated kapok was recycled for six times through simple mechanical squeezing, and showed good oil-water separationperformance oil, indicating its potential application in the removal of spilled oil on water.
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Preparation and Dyeing of Superfine Down-powder/Viscose Blend Film
Wang Xin,Xu Weilin,Ke Guizhen The Korean Fiber Society 2006 Fibers and polymers Vol.7 No.3
Superfine down-powder/viscose blend films were prepared and characterized for their dyeing properties. Down-powder with average size of $2.56{\mu}m$ were suspended in viscose dope and blend films were obtained by solution casting. When the blend films were dyed with acid dye, the dye uptake and K/S values increased with the increase in down-powder content. Amino-acid analyses showed that amino acid component of the down were not affected during the film formation, which confirmed the changes of dye uptake and K/S value.
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Ultrasonic Effects on the Kinetics and Thermodynamics of Dyeing Wool Fiber with Reactive Dye
G. M. Nazmul Islam,Guizhen Ke 한국섬유공학회 2020 Fibers and polymers Vol.21 No.5
Decreasing the temperature for dyeing wool fiber with reactive dye using a laboratory based ultrasonic machinewas investigated as a way to obtain good quality dyed samples. Ultrasonic irradiation was used to reduce dyeing time andtemperature whilst increasing dye migration and fastness. The ultrasonic machine was set at a 40 kHz frequency level, witheffective power of 130 W and heating power of 350 W to carry out the dyeing process of the wool fiber within thetemperature range 60-80 °C. The dyeing processes used both ultrasonic dyeing and without ultrasonic dyeing to obtain thelaboratory results. At every dyeing stage from 60 °C to 80 °C, the exhaustion rate of dyeing was measured. Ultrasonic dyeingyielded better results compared to without ultrasonic dyeing. The diffusion coefficient, partition ratio, and standard affinityincreased with the increased dyeing temperature and the use of an ultrasonic bath. The efficiency of ultrasonic dyeing wasmeasured and the absorption rate constant was at least 55 % greater than without ultrasonic dyeing at every dyeingtemperature i.e. 60 °C, 70 °C, and 80 °C. The color fastness to washing and rubbing was better for samples dyed withultrasonic dyeing. Scanning electron microscopy (SEM) was used to measure the surface changes of the fiber. SEM analysisshowed no evidence of scale damage on the wool fiber surface.
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