• 분석과학
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• 제17권1호
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• pp.60-68
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• 2004

폴리올레핀 부직포는 녹는점이 ${\sim}162^{\circ}C$며 구성비가 40%인 폴리프로필렌과 녹는점이 ${\sim}132^{\circ}C$며 구성비가 60%인 폴리에틸렌으로 구성된것을 이용하였다. 전지격막을 제조하기 위하여 방사선그래프트 법을 이용하여 이 폴리올레핀에 스틸렌을 그래프트 시킨 후 다음으로 술폰산기를 도입하였다. 술폰산기를 갖은 폴리올페핀 부직포를 XPS, SEM, DSC, TGA, 및 Porosimeter를 사용하여 특성 평가 하였다. 술폰화 반응후, 폴리올레핀 부직포에 대한 전해질 보존 (electrolyte retention), 전기저항 (electrical resistance) 및 $K^+$에 대한 운반율과 같은 전기화학적 특성을 조사하였다. 그 결과 술폰산기의 함량이 증가하면 할수록 전해질 보존율은 증가하였으며 반면에 전기저항은 감소하는 사실을 알았다. 또한 술폰산기의 함량이 0.22 ~ 3.60 mmol/g에서 $K^+$의 운반율은 0.90 ~ 0.93이었다.

• 한국막학회:학술대회논문집
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• 한국막학회 2004년도 추계 총회 및 학술발표회
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• pp.199-203
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• 2004

Fibrous arsenic (As) adsorbent was synthesized by loading zirconium (Zr) on fibrous phosphoric adsorbent that was directly synthesized by radiation-induced graft polymerization of 2-hydroxyethyl methacrylate phosphoric acid on polyethylene-coated polypropylene nonwoven fabric. Zirconium reacted with phosphoric acid grafted in the polyethylene layer. Zirconium density of the resulting adsorbent was 4.1 mmol/g. The breakthrough curve of As(V) adsorption was independent of the flow rate up to $1300\;h^{-1}$ in space velocity. The total capacity of As(V) was 2.0 mmol/g-adsorbent at pH of 2. The adsorbed Zr(IV) could be evaluated by 0.4 M sodium hydroxide solution because negligible Zr(IV) could be found in the eluted solution.

• 한국염색가공학회지
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• 제21권6호
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• pp.22-28
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• 2009

Oil-absorbable nonwovens were produced by melt-blown processing of polypropylene chips. The melt-blown processing conditions, such as air pressure, and gear pump speed, DCD. In this study, these three factors were chosen to produce samples. Experimental array and variance analysis of the design of experiment were used to increase the field repeatability and universality. The effect of the factors on oil absorption properties of melt-blown nonwoven fabric such as oil absorbency were evaluated. As a result, the fiber diameter decreased as gearpump speed decreased or air pressure increased. The oil absorbency increased as air pressure increased or gearpump speed decreased and with the DCD increasing the oil absorbency significantly increased.

• 패션비즈니스
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• 제6권1호
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• pp.20-30
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• 2002

The purpose of this study was to provide the basic informations of disposable medical clothes and develop new disposable medical clothes which are not caused environmental pollutions. The staffs of Yuhan-Kimberly and doctors, nurses and personnel of four general hospitals in Seoul were interviewed individually in order to collect useful data of disposable clothes. Also the samples of disposable medical clothes were examined. The materials, designs, size of potential market and actual consumption conditions of disposable medical clothes were found out. New disposable medical clothes were made after having considered all the aspects examined above. Two kind of medical gowns and caps, a kind of medical apron, three kinds of patient robes and a kind of patient cap were made of Korean traditional paper with specific functions instead of nonwoven polypropylene fabric.

• Current Research on Agriculture and Life Sciences
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• 제28권
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• pp.47-52
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• 2010

일반 시설재배에서 보온용으로 사용하는 보온덮개를 벼의 육묘에 이용가능한지를 검토하기 위하여 기존의 부직포와 비교 실험을 수행하여 얻어진 결과를 요약하면 다음과 같다. 4월 20일과 5월 3일에 파종하여 피복재의 종류에 따른 파종 후 8, 15, 25일모의 초장, 엽령 등을 조사하여 비교하였다. 4월 20일에 파종하여 보온덮개 못자리에서 8일간 자란 모의 초장은 부직포 못자리에 비해 초장이 2cm 정도 길었으나 묘소질은 불량하였고, 15일 모의 경우도 이와 유사한 경향이었다. 5월 3일 파종구에서도 8, 15, 25일모 모두 보온덮개 못자리에서 자란 모의 초장이 부직포 못자리에서 보다 컸지만, 모의 충실도는 부직포 못자리에서 높은 편이었다. 5월 3일 파종구의 경우 보온덮개 못자리에서 자란 모는 부직포 못자리에 비해 초장의 신장속도가 빠르고 건물중도 무거웠지만 엽령지수와 모의 충실도는 낮았다. 모의 충실도를 나타내는 묘소질은 육묘일수가 길어질수록 낮아졌는데, 5일간의 경화처리로 모의 충실도가 크게 회복되었다.

• 한국의류학회지
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• 제30권6호
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• pp.981-991
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• 2006

The purpose of this study was to determine the practicability of an experimental protective clothing by identifying the human body's physiological responses to it as well as the human body's comfort level when wearing it, particularly with the use of a processed charcoal material. The experimental protective clothing came in two types: one whose outer side made use of polypropylene film, and the inner side, a non-woven rayon fabric; and one whose inner side made use of a non-woven fabric processed with charcoal with a 10% density. Experiments were conducted on five healthy adult women whose average age was 21. These experiments were conducted at a climatic chamber, in which the temperature and relative humidity were set below $28{\pm}1^{\circ}C\;and\;50{\pm}10%$, respectively, and were measured within a period of 60min, consisting of a 20-min rest period, a 20-min exercise period, and a 20-min recovery period. Based on the results of this study, the efficiency of the processed charcoal material was reviewed, and a database requiring the production of more functional and comfortable protective clothing materials was established.

• Environmental Engineering Research
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• 제23권3호
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• pp.330-338
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• 2018

This study investigated the possibility of using potassium titanate oxide ($K_2Ti_4O_9$) and acrylic acid-grafted polypropylene fabric (PP-g-AA) as adsorbents capable of removing strontium from aqueous solutions. $K_2Ti_4O_9$ showed the highest rate of strontium removal in the weak alkaline range, while the PP-g-AA increased strontium removal in the neutral range. Moreover, the adsorption capacity of the $K_2Ti_4O_9$ was not affected by the coexistence of K and Na ions, while the adsorption capacity decreased when Ca and Mg ions were present at the same concentration as that of strontium. When coexisted at the same concentration as strontium, Na, K, Ca, and Mg ions strongly reduced the adsorption capacity of the PP-g-AA. The results also indicated that the adsorption of strontium on $K_2Ti_4O_9$ was consistent with both the Langmuir and Freundlich adsorption isotherms. In contrast, the adsorption of strontium on the PP-g-AA was more consistent with the Langmuir isotherm model. Moreover, the adsorption equilibrium time of $K_2Ti_4O_9$ was generally 12 h, while that of the PP-g-AA was 5 h, indicating that the adsorption rates were consistent with the pseudo-second order kinetics model. $K_2Ti_4O_9$ and the PP-g-AA could be regenerated by simple washing with 0.5 N HCl.

• 폴리머
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• 제32권6호
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• pp.509-515
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• 2008

Acrylic acid 단량체를 방사선 동시조사법으로 폴리프로필렌 멜트 블로운 섬유에 그래프트 반응시켜 PPmb-g-AAc 공중합체를 제조한 후 아민화 반응을 통하여 아민형 이온교환섬유를 합성하였다. 공중합체의 그래프트율은 acrylic acid 단량체의 농도와 총조사선량이 증가할수록 증가하였으며 acrylic acid 단량체의 농도와 총조사선량이 20 v/v%, 4 kGy일 때 140%로 최대치를 나타내었다. Mohr's salt의 최적농도는 $5.0\times10^{-3}$ M로 나타났다. 아민화율은 그래프트율이 증가할수록 증가하여 140%일 때 78.8%로 나타났다. 아민화한 PPmb-g-AAc 공중합체의 함수율은 기재보다 1.5배 정도 높게 나타났으며 이온교환용량은 7.3 meq/g으로 상용 이온교환섬유보다 2$\sim$3배 정도 높게 나타내었다. 합성한 APPmb-g-AAc의 BET 측정결과 PPmb, PPmb-g-AAc 및 APPmb-g-AAc 섬유의 경우 공극의 크기와 비표면적이 각각 $366.1\;{\AA},\;3.71m^2/g$와 $143.3\;{\AA},\;4.94m^2/g$ 및 $40.97\;{\AA},\;8.98m^2/g$로 공극의 크기는 감소하고 비 표면적이 증가하는 경향을 보였다.

• 한국의류학회지
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• 제24권8호
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• pp.1115-1124
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• 2000

The purpose of this study was 1) to determine physical properties, and subjective evaluation of sensation of sports socks with various type of fiber content and fabric structure, and 2) to develop regression equations for predicting each sensation from physical properties of socks. Thirty healthy male students participated in the wear test with ten replications. The ANOVA, Duncans multiple test, and multiple regression, and paired-t test were used in the statistical analysis, using an SAS package. The results of this study are as follows: 1. 100% cotton socks had higher absorbency and wickability among five different socks. Comfort sensation, tactile sensation and fit sensation of socks were significantly influenced by types of fiber content. People felt that polypropylene socks were less comfortable & slightly tighter, and cotton socks were drier than the other socks. Terry socks were warmer than single jersey socks. 2. The results of the regression analysis showed that tactile sensation of socks after exercise can be predicted from the cube of moisture permeability($R^2$=0.99), and fit sensation can be predicted from drop absorbency, moisture permeability, wickability in wale and weight($R^2$=-0.98).

• 한국염색가공학회지
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• 제30권2호
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• pp.90-97
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• 2018

Hydrophilic reactive hot-melt polyurethane adhesive(HRHA) using a hydrophilic polyol having different molecular weight and NCO index was synthesized. This HRHA was synthesized using Polyethylene glycol(PEG) as a hydrophilic polyol, Polypropylene glycol(PPG) and Polycaprolactone diol(PCL) as hydrophobic polyols, and Methylene diphenyl diisocyanate(MDI) as an isocyanate. The changes in IR spectrum, viscosity and thermal properties of HRHA with different PEG molecular weights and NCO index were investigated, and the tensile strength and elongation of the HRHA casting film and the peel strength, moisture permeability and water pressure of the HRHA coated fabric were confirmed. In this experiment, as the molecular weight of PEG and NCO index increased, the adhesive strength, tensile strength, elongation and moisture permeability was increased but viscosity and Tg was decreased.