• 한국의류학회지
• /
• 제25권3호
• /
• pp.577-585
• /
• 2001

Dyeing properties of the colorants extracted from pomegranate hull on cotton fabric were investigated. Effects of dyeing conditions and mordanting on dye uptake, color change and colorfastness were explored. Cationic agent treatment was done for cotton to improve low dyeability in natural dyeing. In addition antimicrobial activity of the cotton fabrics dyed with pomegranate colorants was examined by the shake flask method. Pomegranate colorants showed low affinity to cotton fiber and its adsorption isotherm was Freundlich type. Therefore, hydrogen bonding was involved in the adsorption of pomegranate colorants onto cotton fiber. Mordants did not significantly increase dye adsorption. Pomegranate colorants produced mainly yellow color on cotton fabric. In order to improve dye uptake, cotton was cationized by treating with Cationon UK(quarterly ammonium salt) and chitosan. The cationized cotton with Cationon UK showed higher dye uptake and shorter dyeing time, compared with the untreated cotton. Chitosan treated cotton also showed high dye uptake, but chitosan was less effective compared with Cationon UK. Fastness to washing, perspiration, and rubbing was not improved by mordanting and cationizing treatment, but light fastness was increased by all mordants and cationic agent. As dye concentration increased, bacterial reduction rate was increased and mordants did not significantly increase bacterial reduction rate.

• 패션비즈니스
• /
• 제13권1호
• /
• pp.115-124
• /
• 2009

Chitosan and CA/BTCA were employed in order to induce crosslinking in the fiber for the improvement of wrinkle recovery of the cotton fabrics and the endowment of anti-microbial functions to the fabric. The treated fabrics were dyed by using reactive dyestuff and their dyeing behaviors were investigated. As a result, the fabric treated with chitosan only exhibited more dye-uptake amount than the untreated fabric, and the treated and untreated fabrics together showed excellent light-fastness and wash-fastness. In the cases that CA or BTCA was added to the chitosan, the CA-treated showed better dye-uptake and dyeing properties as light-fastness than the BTCA-treated. In conclusion, it is possible to maintain the dye-uptake level at reduced treatment cost when the CA is employed as a substitute cross-linking agent for BTCA.

• 패션비즈니스
• /
• 제9권1호
• /
• pp.113-119
• /
• 2005

In our previous study, the color development characteristics in the dyeing of silk fibers and PET fibers using Rhusjara ica and related properties were meticulously reviewed. At the same time, the fabric specimens were endowed with chitosan treatment prior to the dyeing procedure in order to investigate the effect of chitosan on the dyeing behavior. The analysis of the colors only, however, would not give us complete elucidation of the effect of fiber characteristics and the mordanting characteristics. In this study, the effect of chitosan and metal mordant treatment in dyeing of silk and PET fabrics using Rhusjara ica has been studied. The change of air-permeability, wash fastness, and light fastness were also investigated.

• The Journal of Korean Physical Therapy
• /
• 제16권3호
• /
• pp.50-64
• /
• 2004

The studies have been designed to evaluate the effect of wound healing of pulsed ultrasound and chitosan application in diabetic incisive wound of rats. Mild diabetes mellitus was induced in rat used 30 mg/kg streptozotocin. Full thickness skin incision was made on the backs of Sprague-Dawley rats. We used 72 Sprague-Dawley rats which were divided into 4 groups; the subjects were divided into group of 6 rats each 3, 6, and 15 days. The results were summarized as follows; The rate of wound length of pulsed ultrasound with chitosan application groups more decreased than only pulsed ultrasound treatment group. The density of inflammatory cells in the experimental groups was more significantly decreased than diabetic control group(p<0.05). Historically, in the ultrasound with chitosan application groups, reepithelized epithelium was thicker and the collagen fiber were organized in a liner manner and connective tissue was matured faster those of the diabetic control group(p<0.05). From the conclusions above, in this study application of pulsed ultrasound and chitosan can be an effective way of promotion of wound healing in diabetic model.

• 한국섬유공학회:학술대회논문집
• /
• 한국섬유공학회 2003년도 봄 학술발표회 논문집
• /
• pp.321-322
• /
• 2003

Poly(vinyl alcohol) (PVA) is a polymeric biomaterial that obtained by the saponification of poly(vinyl acetate) (PVAc). It has a nontoxic and water-soluble synthetic polymer, and has excellent biodegradability, biocompatibility, ability of film forming, and hydrophilic property, which is widely used in biochemical and biomedical applications.$\^$1)/ Chitosan is one of a few natural cationic polysaccharides that can be obtaiend by alkaline deacetylation of chitin which is the second most abundant polymeric material in the earth.$\^$2)/ (omitted)

• 한국섬유공학회:학술대회논문집
• /
• 한국섬유공학회 2003년도 봄 학술발표회 논문집
• /
• pp.179-182
• /
• 2003

Chitin is the most abundant natural amino polysaccharide and is estimated to be produced annually almost as much as cellulose. It has become of great interest not only as an under utilized resource, but also as a new functional material of high potential in various fields. In addition, chitin and chitosan are recommended as suitable functional materials, because these natural polymers have excellent properties such as biocompatibility, biodegradability, non-toxicity and adsorption properties, etc. (omitted)

• 한국의류학회지
• /
• 제31권12호
• /
• pp.1672-1681
• /
• 2007

텐셀 혼방직물의 단점을 보완하면서 새로운 관능기를 도입하기 위해서는 캐티온화가 효과적이다. 이를 위해 인체 친화성이 있고 공해를 유발하지 않으며 반응이 용이한 키토산을 처리하였으며, 이에 의한 캐티 온화를 확인하기 위하여 음이온성 염료에 대한 염색성 변화를 살펴보았다. 먼저, 반응성 염료와의 염색성은 낮은 중성염의 농도에서도 키토산 처리 시료의 염색성이 우수하게 나타나 반응성 염료에 대한 염색 효율이 증대되었다. 이는 키토산의 아민기 도입으로 텐셀 혼방직물이 캐터온화되어 섬유에 치환된 친핵성기에 의해 반응성 염료에 대한 친화력이 향상됨으로서 중성이하의 조건에서도 염색성이 우수하게 나타난 것이다. 한편, 키토산 처리로 도입된 아민기의 작용으로 산성 염료와 친화력이 거의 없는 텐셀 혼방직물의 산성 염료에 대한 염색성이 크게 향상되었다. 또한 키토산 처리로 인하여 텐셀 혼방직물은 반응성 염료와의 친화력이 더 좋아졌고, 텐셀 단일직물의 경우 산성 염료와의 친화력이 더 좋아졌으며, 산성 염료보다 반응성 염료로 염색시 세탁견뢰도가 더 우수하였다.

• 원예과학기술지
• /
• 제30권2호
• /
• pp.137-143
• /
• 2012

Chinese cabbage plant was grown hydroponically for 4 weeks in order to examine the temporal relationship of calcium concentration of the nutrient solution with calcium content in the leaf tissue and susceptibility of the tissue to soft rot disease by $Pectobacterium$ $carotovorum$ ssp. $carotovorum$ (Pcc). Calcium concentration from 0.5 to 32.0 mM was maintained for 1 week using Hoagland & Arnon solution. The calcium content of the leaf was proportionally increased to the concentration of the nutrient in the solution (r = 0.912). In contrast, the severity of soft rot symptom in the young leaves was inversely related with the amount of calcium supplied to the nutrient solution (r = 0.899). Water-soluble chitosan, prepared by hollow fiber filtration (> 100 kDa) was applied into the nutrient solution from 0.0 to 5,000 ppm. The chitosan of 10 ppm was the most effective to promote calcium uptake of the leaf, showing 155% of the control. The same chitosan solution prohibited most soft rot development of the leaf by Pcc, exhibiting only 53% of the control. Among different molecular weight fractions, chitosan fraction obtained from 30-100 kDa molecular weight cut-off promoted calcium uptake the most up to 163% of the control, and reduced the development of soft rot disease recording merely 36% of the control of the leaf tissue. The results obtained in the present study suggest that large scale production of water-soluble chitosan with an optimum molecular weight and its commercial application to Chinese cabbage production will be important to improve yield and quality of the crop.

• Fibers and Polymers
• /
• 제2권2호
• /
• pp.64-70
• /
• 2001

A three-dimensional, porous collagen/chitosan complex sponge was prepared to closely simulate basic extracellular matrix (ECM) constitutes, collagen and glycosaminoglycan. The complex sponge was prepared by a lyophilization method and had the regular network with highly porous structure, suitable for cell adhesion and growth. The pores were well interconnected, and their distribution was fairly homogeneous. The complex sponge was crosslinked using 1-ethyl-3-(3-dimethyl aminopropyl) carbodiimide (EDC) and N-hydroxysuccinimide (NHS) to increase its boilogical stability and enhance its mechanical properties. The crosslinking medium has a great effect on the inner structure of the sponge. The homogeneous, porous structure of the sponge was remarkably collapsed in an aqueous crosslinking medium. However, the morphology of the sponge remained almost intact in a water/ethanol mixture crosslinking milieu. Mechanical properties of the collagen/chitosan sponge were significantly enhanced by EDC-mediated crosslinking. The potential of the sponge as a scaffold for tissue engineering was investigated using a Chinese hamster ovary cell (CHO-K1) line.

• 패션비즈니스
• /
• 제11권1호
• /
• pp.136-148
• /
• 2007

African marigold is a common plant easily available in many flower beds. It has been reported as a practical and prospective resource of dyes since the dyes can be extracted from their bodies as well as petals. In this research, cotton and ramie fabrics which are made from natural cellulose were dyed using the extract of the African Marigold which is a variety of marigold. Dyeing tests were carried out under different pH of the dye solution and mordants. Dyeability was evaluated by examining and measuring surface color, K/S value, and the changes in the maximum absorption wavelength. The probability of improving dyeability was investigated by pre-mordanting with pre-treated chitosan. For the dyeing with marigold extract, the color tone did not differ by pre-mordanting and non-mordanting. Reaction with post-mordanting was excellent, which was colored in various yellow series. The best dyeability was achieved in dye solution of pH 6.5-7.0 which is not conditioned. The largest K/S value and color difference were obtained in tin mordanting. The dye uptake was greatly increased in chitosan pre-treated mordanting compared with the post-mordanting without chitosan pre-treatment. Due to its high heat resistance, African Marigold extract is easy for dye extraction and dyeing, and its dyeability is excellent for natural cellulose fibers. Also, colorfastness was proved to be practically usable.