버진 폴리에스터 직물과 재생 폴리에스터 직물의 물리적 특성 및 시촉감 특성 비교

박천상,강용덕,김대운,이지현,조준영,홍예일,채영주 충북대학교 생활과학연구소 2022 생활과학연구논총 Vol.26 No.2

Background/Objectives: This study aims to evaluate the feasibility of substituting recycled polyester woven fabrics for virgin polyester woven fabrics. To this end, the various physical and visual-tactile properties of virgin and recycled polyester fabrics with similar structural properties were compared. Methods: As physical properties, the tensile strength, elongation, abrasion strength, flex stiffness, and crease resistance of the two types of polyester woven fabrics were measured five times under standard laboratory condition. The subjective visual-tactile assessments were also conducted by 40 male and female subjects with normal color vision using seven-point Likert scales. Results: In terms of tensile strength, elongation, and abrasion strength, virgin polyester woven fabric showed numerically better results than recycled polyester woven fabric, while recycled polyester fabric had higher values in flex stiffness and crease resistance. However, there was no statistically significant difference between the two polyester fabrics in all physical properties. In addition, recycled polyester woven fabric was found to have more positive visual-tactile properties than virgin polyester woven fabric in general. Conclusion/Implications: Since recycled polyester fabric was found to have similar or more positive physical and visual-tactile properties to virgin polyester fabric, it is envisaged that eco-friendly recycled polyester will be a successful alternative to virgin polyester.

Photooxidation Properties of Photosensitizer/Direct Dye Patterned Polyester/Cotton Fabrics

Wangbingfei Chen,Weiwei Wang,Xiaodong Ge,Qufu Wei,Reza Arman Ghiladi,Qingqing Wang 한국섬유공학회 2018 Fibers and polymers Vol.19 No.8

Towards the goal of developing anti-infective textiles based on a photodynamic inactivation mechanism, here we present the design, dyeing procedure, characterization, substrate photooxidation studies, and antibacterial efficacy of methylene blue-dyed polyester fabrics, termed MB-polyester. Dye-uptake and apparent K/S (absorption and scattering coefficient) values as a function of MB concentration % (o.w.f) were determined, and were found to correlate. Photooxidation studies employing the model substrate 1,5-dihydroxynaphthalene (1,5-DHN) revealed that the MB-polyester fabrics were able to generate singlet oxygen in an illumination time-dependent manner. Antibacterial efficacy was evaluated against Staphylococcus aureus (ATCC-29213), with our best results achieving a 99.89 % (~3 log units) reduction in Colony-Forming Units (CFU)/mL after only 30 min illumination (Xenon lamp, 3500 mW/cm2, 420-780 nm). On the basis of these results with MB-polyester, we subsequently designed patterned dual-dyed polyester/cotton fabrics, wherein an alternating pattern of MBdyed polyester was combined with direct dyes-dyed cotton, and showed that their ability to sensitize singlet oxygen (1O2) in the photooxidation reaction of 1,5-DHN was maintained. Taken together, these findings suggest that MB is a suitable photosensitizer (PS) against S. aureus for the practical development of low-cost polyester-based antimicrobial textiles, and can potentially be used in the production of diverse form-patterned textiles that possess a photodynamic antimicrobial inactivation mechanism.

분산염료에 의한 폴리에스터 편평사의 염착 특성. I.

이범훈,Lee, Bum Hoon 한국섬유공학회 2017 한국섬유공학회지 Vol.54 No.5

Dyeing properties of disperse dyes of different energy types were investigated for application with poly(ethylene terephthalate) flat yarn (FY). The maximum exhaustions of low-energy type disperse yellow 54, blue 56, and red 60 were 96%, 94%, and 99%, respectively, and high-energy type disperse orange 30, blue 79, and red 167 were 97%, 98% and 98%, respectively. The exhaustion values of high-energy type disperse dyes on flat polyester yarns were higher than those on normal polyester yarn, while the low-energy type disperse dyes showed no significant differences in dyeability between flat and regular yarns. The build-up properties of various disperse dyes on flat polyester yarn were superior to that of regular polyester. The K/S values of flat polyester yarn linearly increased with the increase in dye concentration in the range of 0.5-8.0 wt.%. The half dyeing times of the flat yarns were approximately 5 min shorter than those of general polyester due to their larger surface area and lower crystallinity. The surface area of flat polyester yarn is larger, which directly results in lower crystallinity. Uneven dyeing properties were observed in the same fabric due to cold crystallization, which was also confirmed using DSC.

Effect of Polymer Characteristics on the Thermal Stability of Retinol Encapsulated in Aliphatic Polyester Nanoparticles

조은철 대한화학회 2012 Bulletin of the Korean Chemical Society Vol.33 No.8

The present study investigates how the thermal stability of retinol (vitamin A) encapsulated in polyester nanoparticles is influenced by the types of polyester used for the nanoparticles. A variety of polyester-retinol nanoparticles were prepared with various polyesters like: poly(ethylene adipate), PEA; poly(butylene adipate), PBA; poly(hexamethylene adipate), PHMA; and three polycaprolactones, PCL, of different molecular weights (Mn ~10, 40, and 80K). The chemical stability of retinol in these nanoparticles, monitored in an aqueous solution at 25 oC and 40 oC for 4 weeks, was high in the following order of the nanoparticles prepared with PHMA > PCL 40K > PCL 10K > PCL 80K > PBA~PEA at 25 oC and PCL 10K > PCL 40K > PHMA > PCL 80K > PEA > PBA at 40 oC. More importantly, this study has also found that the thermal stability of the retinol in the nanoparticles was closely connected with the melting temperatures of polyesters and polyester nanoparticles. The results were further discussed with possible factors - such as sample preparation condition (or history) and miscibility between the polyesters and retinol - affecting Tm of the polyesters and the nanoparticles.

Corrosion Protection Performance of Polyester-Melamine Coating with Natural Wood Fiber Using EIS Analysis

( Pyonghwa Shin ),( Duhwan Jo ),( Minyoung Shon ) 한국부식방식학회 2016 Corrosion Science and Technology Vol.15 No.2

In the present study, polyester-melamine coating systems with natural wood fiber (NWF) were prepared and the effects of NWF on the corrosion protectiveness of the polyester-melamine coating were examined using EIS analysis. From the results, higher average surface roughness was observed with increase of NWF content. Water diffusivity and water uptake into the polyester-melamine coatings with NWF were much higher than that into the pure polyester-melamine coating. The decrease in the impedance modulus |Z| was associated with the localized corrosion on carbon steel, confirming that corrosion protection of the polyester-melamine coatings with NWF well agrees with its water transport behavior.

Effect of Polymer Characteristics on the Thermal Stability of Retinol Encapsulated in Aliphatic Polyester Nanoparticles

Cho, Eun-Chul Korean Chemical Society 2012 Bulletin of the Korean Chemical Society Vol.33 No.8

The present study investigates how the thermal stability of retinol (vitamin A) encapsulated in polyester nanoparticles is influenced by the types of polyester used for the nanoparticles. A variety of polyester-retinol nanoparticles were prepared with various polyesters like: poly(ethylene adipate), PEA; poly(butylene adipate), PBA; poly(hexamethylene adipate), PHMA; and three polycaprolactones, PCL, of different molecular weights ($M_n$ ~10, 40, and 80K). The chemical stability of retinol in these nanoparticles, monitored in an aqueous solution at $25^{\circ}C$ and $40^{\circ}C$ for 4 weeks, was high in the following order of the nanoparticles prepared with PHMA > PCL 40K > PCL 10K > PCL 80K > PBA~PEA at $25^{\circ}C$ and PCL 10K > PCL 40K > PHMA > PCL 80K > PEA > PBA at $40^{\circ}C$. More importantly, this study has also found that the thermal stability of the retinol in the nanoparticles was closely connected with the melting temperatures of polyesters and polyester nanoparticles. The results were further discussed with possible factors - such as sample preparation condition (or history) and miscibility between the polyesters and retinol - affecting $T_m$ of the polyesters and the nanoparticles.

PET, Tencel, Cotton MVS 혼방사의 섬도와 혼용률에 따른 물성 특성

사아나 ( A Na Sa ),이정순 ( Jung Soon Lee ) 한국의류산업학회 2015 한국의류산업학회지 Vol.17 No.2

This study investigates the physical properties of Murata Vortex Spinning (MVS) blended yarn with yarn count(20’s, 30’s, 40’s) and blend ratio(Polyester 100, Polyester70:Cotton30, Polyester50:Cotton50, Polyester30:Cotton70, and Polyester50:Tencel40:Cotton10). This study evaluated tenacity, elongation, bending rigidity, bending hysteresis, hairiness coefficient, irregularity and twist number. The structure of MVS blended yarninfluenced stress, strain, bending rigidity, bending hysteresis and the hairiness coefficient of MVS blended yarn decreased as the yarn count increased. MVS blended yarn consists of core and sheath. The core of MVS blended yarn is composed of a parallel fiber with a wrapping fiber that covers thecore fiber. This special structure of the MVS blended yarn effects the physical properties of the yarn; in addition, the mechanical properties of the component fibers influenced the stress, strain, bending rigidity, bending hysteresis and hairiness coefficient of MVS blended yarn with the blend ratio. Polyester decreases and cotton increases resulted in decreased physical properties. Asimilarpolyester content increased thetencel and physical properties. Appropriate physical properties and a variety of touch expression can be realized through a correct blend ratio.

비이온계 계면활성제 수용액에서 polyester/cotton(65/35) 혼방직물의 습윤특성

김천희 韓南大學校 2007 論文集 (인문·사회·자연과학·공학) Vol.37 No.-

Span 20, Tween 20, 40, 60, 80, 21, 61, 81, 65, 85 등 10종의 비이온계 계면활성제 O.lgpdl 수용액이 polyester/cotton(65/35) 혼방직물의 습윤특성에 미치는 영향을 연구하였다. 계면활성제 첨가시 접촉각(θ)은 현저히 감소하나 수분보유량(W)과 수분보유량비(W/H)는 큰 변화가 없었다. 이는 순수에서의 시료 W/H가 매우 커서 계면활성제 첨가에 따른 효과를 확인할 수 없기 때문이라 생각된다. 친수기 구조가 동일할 경우 친유기 tail의 탄소수가 증가하면 θ가 증가하고, 친유기가 불포화 구조가 되면 접촉각이 감소하였다. 따라서 계면활성제의 친수성이 증가하면 접촉각이 감소하여 시료의 wetting에 효과적이며 친유기 구조의 불포화성은 친수성 증가와 동일한 효과를 갖는다. 본 시료의 습윤특성 향상에는 Span 20과 Tween 81이 가장 효과적이었고 계면활성제 수용액의 표면장력이 낮고 HLB(hydrophile lipophile balance)가 커서 친수성이 클수록 Cosθ 값이 증가한다 polyester/cotton 혼방직물의 접촉각은 polyester 직물과 cotton 직물의 접촉각의 사이 값을 나타내며, 계면활성제에 따른 습윤특성 변화는 유사한 경향을 보여준다. The effects of O.lgpdl nonionic surfactant solutions on water wetting/retention properties of polyester/cotton(65/35) fabric are reported. The following nonionic surfactants; i.e., Span 20, Tween 20, 40, 60, 80, 21, 61, 81, 65, & 85, are used in the study. The contact angles(θ's) are greatly decreased, however, the water retention ratio (W/H) values are not changed much by adding surfactants into the system. Hydrophilic surfactants which have low number of carbon atoms or unsaturated hydrophobe structures are more effective in improving the wetting properties of the fabric. Span 20 and Tween 81 are most effective. In general, surfactant solutions having low surface tension and high HLB values give high Cosθ's. The θ’s of polyester/cotton fabric show in between values of cotton and polyester fabrics.

Photocuring of a thiol-ene system based on an unsaturated polyester

Kim, Y. B.,Kim, H. K.,Choi, H. C.,Hong, J. W. Wiley Subscription Services, Inc., A Wiley Company 2005 Journal of applied polymer science Vol.95 No.2

<P>To produce a photocurable thiol-ene system, unsaturated polyester was prepared from the condensation reaction of ethylene glycol, diethylene glycol, and fumaric acid. Diallyl groups were introduced into the ends of the unsaturated polyester by a sequential condensation reaction. The coating formulation studied contained an equimolar ratio of thiol and vinyl groups of the prepared unsaturated polyester, including 1 wt % Irgacure 184. The curing behaviors of the unsaturated polyester with multifunctional thiols were investigated using real-time FTIR spectroscopy. The rates of disappearance of thiol and vinyl groups of the unsaturated polyester were similar, demonstrating that there was little free-radical homopolymerization of the internal fumaric group or the end-capped vinyl ether group during the photocuring process and that the thiol-ene reaction is the dominant process. The kinetics of the model compounds demonstrated that the reaction of the terminal allyl double bond with the thiyl radical is faster than that of the internal fumaric double bond in the UV curing of the unsaturated polyester. The storage stability of the thiol-ene system based on unsaturated polyester was effectively increased by the addition of N-PAL. The Raman spectra revealed that the presence of a multifunctional thiol (penta 3-MP4) in the coating formulation increased the degree of surface curing due to the chain-transfer ability of the thiyl radical. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 95: 342–350, 2005</P>

Ethylene glycol을 사용한 폐지의 액화 및 액화물로부터 polyester 제조

이동헌(Dong Hun Lee),김창준(Chang-Joon Kim),김성배(Sung Bae Kim) 한국생물공학회 2010 KSBB Journal Vol.25 No.3

폐지를 사용하여 액화와 가교단계를 거쳐 polyester를 제조하였다. 첫 번째 단계에서는 EG를 사용하여 산 촉매하에서 폐지를 액화하였다. 폐지의 액화수율에 영향을 미치는 인자는 반응시간, 반응온도, 그리고 촉매농도이고 각각 60~120분, 150~170℃, 그리고 2~4% 범위 내에서 실험하였다. 최적조건은 100분, 160℃, 3%이었고 이 조건에서 액화수율은 67%이었다. 두 번째 단계에서는 최적조건에서 얻어진 폐지 액화물을 succinic anhydride와 반응시켜 polyester를 제조하였다. 반응시간과 carboxyl기/수산기의 비가 각각 35~50분, 1.5~2.5의 범위 내에서 가교도에 미치는 영향을 조사하였다. 제조된 polyester의 가교도는 80~90% 로 반응조건에 따라 큰 차이가 없었다. A novel method to prepare polyester from wastepaper through liquefaction and crosslinking stages was studied. At the first stage, the liquefaction of wastepaper was carried out in the presence of ethylene glycol under acidic conditions. The factors that affect on liquefaction yield were found to be reaction time, temperature, and acid concentration, and their ranges were 60~120 minutes, 150~170℃, and 2~4%, respectively. The optimum condition was found to be 100 minutes, 160℃, and 3% sulfuric acid concentration, and the liquefaction yield at this condition was 67%. At the second stage, polyester was prepared from the liquefied wastepaper obtained at the optimum liquefaction condition by crosslinking with succinic anhydride. The effect of reaction time and carboxylic group/hydroxyl group ratio on crosslinkage were investigated at conditions covering 30~50 minutes of reaction time and 1.5~2.5 of carboxylic group/hydroxyl group ratio. The crosslinkages of polyester prepared were 80~90%, which were almost same regardless of reaction conditions.