매트릭스가 폴리스티렌이고 분산상이 폴리부타디엔인 스타형 블록공중합체의 물성을 개선하고 고분자 전해질의 매트릭스로서의 사용 가능성을 확인하기 위하여 스타형 폴리스티렌-부타디엔 공중합체의 수소화/술폰화 개질 실험을 행하였고, 다음의 결과를 얻었다. 1. 수소화제로 p-toluenesulfonylhydrazide/tri-n-propyl amine을 사용하였으며, 온도에 따른 수소화 반응 속도의 변화로부터 구한 스타형 SB 공중합체의 수소화 반응 활성화 에너지는 89kJ/mol이었다. 2. 수소화 반응에 의해 부타디엔 단위가 지방족 탄화수소로 변화되어 분산상인 PB 영역의 유리전이온도가 $50^{\circ}C$ 정도 증가하였으나, 열안정성은 다소 감소하였다. 3. 수소화된 SB(H-SB)를 acetyl sulfate를 사용하여 술폰화한 결과, $65^{\circ}C$의 반응온도에서 60분 이상 반응시키면 한계 술폰화 정도에 도달하며, 술폰화제이 양이 증가할수록 술폰화 정도는 증가하였다. 그러나, 한계 술폰화제의 양을 넘어서면 불용의 전해질이 얻어진다. 4. 술폰화 정도가 증가함에 따라 포화함수율과 이온전도도 모두 증가하며, 23 mol% 정도 술폰화된 경우 함수율과 이온전도도는 각각 18%, $1.6{\times}10^{-3}S/cm$이었다.

Composite films consisting of two biocompatible natural polymers were prepared by incorporating bacterial cellulose into silk fibroin. The high crystalline cellulose hydrogel was synthesized by bacteria, Acetobacter xylinum. Silk fibroin was finely blended with the bacterial cellulose fibrils by adding aqueous silk fibroin solution into the bacterial cellulose hydrogel. We observed individual bacterial cellulose fibrils within a silk fibroin matrix by field emission scanning electron microscopy. The silk fibroin well penetrated between the individual fibrils of the bacterial cellulose. The silk fibroin/bacterial cellulose composite film did not dissolve in water without further crystallization process, whereas a pure silk fibroin film easily dissolved in water without crystallization process. The crystallization phenomenon of silk fibroin in the composite film was verified by X-ray diffraction and Fourier transform-infrared spectroscopy. Furthermore, the mechanical properties of the silk fibroin/bacterial cellulose composite film markedly increased when the composite film was hydrated. The silk fibroin/bacterial cellulose composite films became more flexible and tougher when they were hydrated, while it was very brittle in the dehydrated state.

Poly(N-isopropylacrylamide)(PNIPAAm) hydrogels were synthesized via radical polymerization of N-iso-propylacrylamide in aqueous medium using ammonium persulfate and N,N'-methylenebisacrylamide (MBA) as an initiator and a crosslinking agent, respectively. PNIPAAm hydrogels exhibited a critical gel transition temperature (CGTT) at $32{\sim}34^{\circ}C$. Swelling and deswelling behaviors of the hydrogels with different crosslinking densities were analyzed by measuring swelling ratio below and above CGTT. The swelling ratio of the hydrogel below CGTT decreased with increasing MBA concentration, while that above CGTT increased. As MBA concentration increased, the micropore size decreased, however, the number of micropore increased slightly in the freeze-dried hydrogels swollen in water at $25^{\circ}C$ (below CGTT) before drying. The micropore became smaller and denser in the des deswollen state. The swelling ratio of the hydrogels decreased slightly with the repeated swelling and deswelling treatment.

PET fabrics were irradiated by a UV irradiator containing a mercury lamp. The UV-irradiated PET was photo-oxidized by both UV light and ozone and nano-scale roughness was produced on the PET surface. The irradiated PET became less reflective in a visible wavelength region below 450 nm and the zeta potential of the irradiated PET fabric decreased to be more negative compared with that of the pristine PET. The surface modified PET fabric were colored with two cationic dyes. The dyeability of UV treated side increased proportionally with increasing UV energy in comparison with the unirradiated side. Various tone-on-tone patterns were obtained by one-bath dyeing based on the enhanced dyeability of UV-irradiated area on the PET, which is proportional to the UV energy.

pH responsive fibers were fabricated from a set of architecturally designed copolymers of acrylonitrile and acrylic acid derivatives. The copolymers, which were prepared in a block type structure using method of regulated dozing, were found to impart a domain morphology to the spun fibers [1,2]. This morphology, having separate domains of acrylonotrile and acrylic acid, was found to significantly enhance both the diffusion of water through the fiber for faster response and physical bonding of chains for better mechanical properties compared to fibers prepared from random copolymers. In this study, the responsive domains of acrylic acid were modified by replacing acrylic acid (AA) with methacrylic acid (MA) in the above copolymer system. The effect of bulky side group ($-CH_{3}$) on pH response and mechanical properties of the pH responsive fibers were investigated. Thus, pH sensitive block copolymers, poly(acrylonitrile-co-acrylic acid:58:42) (AA40B) and poly(acrylonitrile-co-methacrylic acid:57:43) (MA30B), were synthesized using regulated dosing of more reactive monomer-acrylic acid/methacrylic acid monomers by free radical polymerization. The copolymers were converted to fibers by solution spinning and annealed at $120^{\circ}C$ to get a stable morphology. The annealed fibers exhibited reversible response to changing pH and were stable to repeated cycling. Expectedly, the fibers from MA30B showed significantly higher volumetric swelling at 5010% compared to 3610% in AA40B. The results implied that the presence of bulky $-CH_{3}$ group in methacrylic acid, could open up the responsive domains of the fibers. However, the bulky group also affected the bonding in the acrylonitrile domains indicated by somewhat lower mechanical properties of the fibers.

Textile fabrics used for interior and home contact with the human body frequently, hence the importance of comfort including hand should be considered. The assessment methods of comfort for the interior textile materials have not been studied even though there are many previous researches in the field of wear comfort. The relationships between the mechanical properties and interior fabric hands through mechanical testing and statistical analysis tech niques were identified. In this study, 18 kinds of chenille and jacquard fabrics used for seat cover were selected. The Kawabata Evaluation System was used to measure the mechanical properties for 18 fabrics and THV(total hand value) determined by subjective evaluation of 10 participants of an expert panel was also utilized. We ran the stepwise regression analysis to select the most significant mechanical properties and to develop the prediction models for hands. The tensile properties, bending, thickness and the mean deviation of surface friction were selected as the significant mechanical properties affecting fabric hands. In addition, the interior fabrics were categorized into five groups through the cluster analysis using four mechanical properties. The THV, constituent yams, and such fabric structural factors as pile floating area and pattern showed significant differences among five groups. The interior fabric hands are expected to improve through controlling the four mechanical properties by applying the structural factors for fabric design and construction.

The efficiency and benefits of product information of products consisting of natural substances, such as bamboo, charcoal, green tea were explored. The underwear evaluation before/after getting product information was considered through questionnaire survey method. They were asked to guess the price and the natural substances before and after knowing the product information. The subjective responses of comfort and tactile sensation while subjects were exercising in a hot, dry environment were measured experimentally. Their preference and tactile sensations were different after the product information was told. In early running period, the subjects felt comfort mostly in the charcoal underwear, since it absorbed perspiration. In late recovery period, they felt comfort mostly in the bamboo underwear for its quick drying. New underwear products were assumed as higher price than controlled underwear, and after acquiring the product information they guessed much higher prices to the same product, answering the changes in the subjective sensation, too.

In order to provide prediction models for frictional sound of Korean traditional silk fabrics by mechanical properties, a number of traditional silk fabrics were selected and their sounds by back-and-forth friction were recorded and analyzed in terms of their sound spectral shapes by Fast Fourier Transform(FFT), some quantified physical sound characteristics. Compared to one-way friction sounds, back-and-forth ones of traditional silk fabrics seemed to be both less loud and less rougher and to be more sharper. The values for LPT, ${\Delta}L$, loudness(Z), roughness(Z), and fluctuation strength(Z) were varied among the fabrics while those of sharpness(Z) were similar. The traditional silk fabric groups such as Sa, Dan, Nobangju, and Shantung were significantly differentiated from one another in values of some sound characteristics including LPT, ${\Delta}L$, loudness(Z), roughness(Z), and fluctuation strength(Z). In prediction models by using mechanical properties, surface properties (SMD) and compression properties (RC) were closely related to both physical and psychoacoustic properties.