• 한국염색가공학회지
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• 제32권1호
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• pp.51-56
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• 2020

This study aims to pursue the multi-functional textile finishing method to detoxify chemical warfare agent by simply treating the well-known antimicrobial agent, chitosan, to cotton fabric. For this purpose, DFP(diisopropylfluorophosphate) was sele cted as a chemical warfare agent simulant and cotton fabric was treated with 0.5, 1.0, and 2wt% chitosan solution in 1wt% acetic acid. DFP decontamination properties of the chitosan treated cotton fabrics were evaluated and compared with the untreated cotton fabric. The chitosan treated cotton fabrics showed better DFP decontamination than the untreated cotton. Decontamination properties of the chitosan treated cotton fabrics improved with the increased chitosan solution used. Especially, the cotton fabrics treated with 2wt% chitosan solution showed 5 times more DFP decontamina tion than the untreated cotton fabrics. This suggested that the chitosan treated fabric has potential to be used as a material for protective clothing with chemical warfare agent detoxifying and antimicrobial properties.

• 한국의류산업학회지
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• 제21권5호
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• pp.665-676
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• 2019

This study provides basic data for future design proposals aimed at improving the uniforms and bullet/stab proof garments of local police. An analysis was conducted on various aspects of the uniforms used until 2015 and those newly introduced in 2016. Current bullet/stab proof garments were compared with old stab proof garments; in addition, police force posting on the internal SNS were analyzed in regards to the improvement needs for uniforms. Analyses results are as follows. As for the uniforms, convenience was improved by eliminating the necktie, and the four trigrams embroidery was added to emphasize the Korean identity. Cargo-style pants were added for enhanced activity, and the color of the top was changed to turquoise to improve discrimination. In terms of material, durable polyester was used heavily in outside uniforms that were likely to be damaged during work; consequently, the percentage of elastic materials was increased for improved activity. The price showed a high increase rate due to inflation and the use of functional new materials. Complaints and demands for improvement continued despite various modifications made to uniforms and suggested a strong need for further improvements that reflected the opinions of wearers. As for the protective garments, there was a limit to reducing the final weight despite the use of lightweight material because of protection performance enhancements made from expanding the protection surface area. Also, considering further decrease in supply rate, it was deemed necessary to secure budget for full supply of bullet/stab proof garments.

• Safety and Health at Work
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• 제8권2호
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• pp.183-188
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• 2017

Background: Recommendations have been proposed for minimum aerobic fitness among firefighters but it is unclear if those criteria relate to performance on the fireground. Less fit individuals fatigue more quickly than fit individuals when working at comparable intensity and may have gait changes, increasing risk of falls. We evaluated the effect of fatigue during a live burn evolution on gait parameters and functional balance comparing them to aerobic fitness levels. Methods: A total of 24 firefighters had gait and balance tested before and after a live burn evolution. Data were stratified by aerobic fitness of greater/less than 14 metabolic equivalents (METs). Results: Analysis of gait cycles measurements before and after the live burn evolution revealed that single leg stance, cycle, and swing time decreased (p < 0.05) but there were no differences in the other measures. There were no differences in time to complete the functional balance test, or errors committed before or after a live burn evolution. When firefighters were sorted by fitness level of 14 METs, there were no differences for errors or time before or after the live burn evolution. Balance data were analyzed using a linear regression. Individuals with lower fitness levels required more time to complete the test. Conclusion: A 14-MET criterion failed to distinguish gait or balance characteristics in this group. However, less fit firefighters did require more time to complete the balance test (p = 0.003). Aerobic fitness alone does not predict gait changes among firefighters following a live burn evolution but does appear to influence functional balance.

• 한국염색가공학회지
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• 제29권4호
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• pp.247-255
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• 2017

Scutellaria Baicalensis(SB) is widely used in traditional and modern oriental medicine. It possesses several biology activities such as anti-oxidative, anti-inflammatory, antimicrobial and antiviral activities. In this study, a functional high density polyethylene (HDPE) fabric with antimicrobial properties was developed using zeolite microparticles as a SB extract delivery carrier. Zeolites loaded with SB extract were prepared by immersing in an SB extract aqueous solution. The average size of the SB extract-loaded zeolites was about 0.1 to $2.0{\mu}m$, and the morphology of the zeolites was not altered after SB extract binding. The resulting SB extract-loaded zeolites were then immobilized homogeneously onto the HDPE fabric using acrylic binder. The encapsulation efficiency of SB extract to the zeolite was more than 45%. The in vitro release test of SB extract-loaded zeolites containing HDPE fabrics showed release of 35% of the total SB extract by day 1 in a 24hours immersion study. Moreover, the SB extract-loaded zeolites containing HDPE fabrics showed effective antimicrobial activity against Streptococcus mutans, Staphylococcus aureus, and Klebsiella pneumoniae, indicating that this innovative delivery platform potently imparted antimicrobial activity to the HDPE fabric. In conclusion, the current study suggests that the HDPE fabric containing the SB extract-loaded zeolites microparticle carrier system has potential as an effective antimicrobial textile such as safety gloves, protective gloves etc.

• 생명과학회지
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• 제33권10호
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• pp.820-827
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• 2023

2019년 말 시작된 코로나바이러스감염증-19(COVID-19) 이후 병원성균과 바이러스 감염을 방지하기 위하여 사용한 방호복의 착용 시간이 길어지면서, 항균 및 항바이러스 기능에 인체 친환경적인 안전한 방호 소재 개발이 요구되었다. 본 연구에서는 약용식물인 Zanthoxylum piperitum DC의 에탄올 추출물을 이용하여 천연 항균 방호 소재 개발 가능성을 조사하였다. 초피잎 80% (w/v) 에탄올 추출물의 원내 감염균 9종에 대한 항균력을 디스크 확산법으로 측정한 결과, Staphylococcus aureus ATCC 25923, Klebsiella pneumoniae ATCC 13883, Salmonella typhimurium과 Aeromonas hydrophila에 항균력을 보였다. 초피잎 에탄올 추출물로부터 유기용매 분획을 실시하여 얻는 분획의 항균 활성을 비교하였을 때, EtOAc 분획이 S. aureus ATCC 25923, K. pneumoniae ATCC 13883, S. typhimurium과 A. hydrophila와 P. vulgaris KCTC 2433에 대해 항균력을 보였다. 초피잎 80% 에탄올 추출물의 S. aureus ATCC 25923, K. pneumoniae ATCC 13883, P. vulgaris과 A. hydrophila에 대한 IC₅₀은 각각 0.59 mg/ml, 0.50 mg/mL, 1.06 mg/ml 그리고 0.06 mg/ml 이었다. Z. piperitum DC 잎의 80% (w/v) 에탄올 추출물의 항균 보호 원단 개발에 적용 가능한지 알아보기 위해 초피잎 에탄올 추출물을 케이엠 헬스케어 사의 방호 원단에 처리한 후 방호원단에 부여된 항균활성을 JIS L1902-Absorption 방법으로 검정하였다. 초피잎 80% 에탄올 추출물을 1.0% (w/v) 농도로 처리하였을 때, S. aureus ATCC 25923와 K. pneumoniae ATCC 13883에 대해 정균 및 살균 활성치가 2.0이상으로 확인되었다. 이러한 결과는, 초피잎 에탄올 추출물을 천연 항균 기능성 방호 원단 개발에 활용할 수 있음을 시사한다.