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Improving the DIMP Sorption Capacity Durability of Zirconium Based Metal-Organic Frameworks Coated with Polydimethylsiloxane at High Humidity (PDMS 코팅을 통한 지르코늄 기반 금속유기골격체의 고습 환경에서 DIMP 흡착 성능 지속성 개선)

  • Jang, Wonhyeong;Jeong, Sangjo
    • Applied Chemistry for Engineering
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    • v.33 no.3
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    • pp.296-301
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    • 2022

  • Due to the fact that zirconium based metal-organic frameworks (Zr-MOFs), such as UiO-66, have a large specific surface area and excellent selective adsorption capacity, Zr-MOFs are gaining attention as materials that can provide protection from the attack of chemical warfare agents in battleground. However, most of the metal-organic frameworks have an issue of selective adsorption capacity degraded by water molecules when exposed to the atmosphere, because of the weak metal-organic ligand bonds and the presence of voids. Therefore, polydimethylsiloxane (PDMS), a representative hydrophobic polymer material, was coated on the surface of UiO-66 to enhance the sustainability of the diisopropyl methylphosphonate (DIMP) sorption capacity in the battleground condition. Through the analysis of surface structure and organic functional group distribution of PDMS coated UiO-66, silicon was confirmed to be evenly coated. The contact angle increased by over 30° for the PDMS coated UiO-66, indicating that the hydrophobicity was improved. In addition, both the UiO-66 and PDMS coated UiO-66 were used as adsorbents for DIMP, a similar chemical warfare agent, to investigate the durability of adsorption capacity in a high humidity environment. The PDMS coated UiO-66 showed higher durability of adsorption capacity for 20 days than that of pristine UiO-66.

  • https://doi.org/10.14478/ace.2022.1028 인용 PDF KSCI

The Characteristics of Diisopropyl Methylphosphonate Adsorption on Zirconium-based Metal Organic Frameworks Manufactured by using Different Acids as Modulators (서로 다른 산을 조절인자로 활용하여 제조한 지르코늄 기반 금속유기골격체의 Diisopropyl Methylphosphonate 흡착 특성)

  • Jang, Wonhyeong;Kim, Honghyun;Jeong, Sangjo
    • Applied Chemistry for Engineering
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    • v.32 no.5
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    • pp.524-531
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    • 2021

  • Depending on the type and amount of acid used as a modulator in the manufacturing process, the structural properties of UiO-66 can be modified and the adsorbability of chemical warfare agents can be enhanced. In this study, several acids as a modulator were used to synthesize UiO-66. Their properties were analyzed with FT-IR, XRD, titrator, and adsorption isotherms using chemical warfare agent simulant, DIMP. The UiO-66, structurally damaged by hydrochloric acid as a modulator, showed lower crystallinity and DIMP adsorption capacity and also smaller specific surface area and volume of voids compared to those of UiO-66, which was manufactured using acetic acid, and formic acid as a modulator. Additionally, UiO-66 which was synthesized by adding formic acid and hydrochloric acid as a modulator, showed the highest DIMP adsorption capacity and is likely to be used as an adsorbent for chemical warfare agent in the future.

  • https://doi.org/10.14478/ace.2021.1061 인용 PDF KSCI

A Study on Gwan-Rye Costumes (관예복식고 -사영과 라장을 중심으로-)

  • Lee Kyung Ja
    • Journal of the Korean Society of Clothing and Textiles
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    • v.2 no.2
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    • pp.269-276
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    • 1978

  • This thesis studied the costumes of Gwan-Rye(관예). the lowest ranking officials of Yi-Dynasty. It researched the written materials and compared it with relics of Gwan-Rye costumes. The gists of the result are; 1) The Koryo tradition of Gwan-Rye costumes continued until the early days of Yi-Dynasty. 2) The Gwan-Rye costumes can be classified into two styles. One is Sa-Ryung(사영) style, which consisted of Dan-Ryung(단령) robe and Jo-Geon(조시) as head gear. Na-Jang(라장) style. the another, consisted of Dan-Ryung. Ban-Bi-Ui(반비의) and Jo-Geon. 3) These styles changed around the days of Yeon-San(연산), the 10th King of the Dynasty. The Na-Jang of later days wore Cheop-Ri(첩리) robe instead of Dan-Ryung. And the Sa-Ryung costume was devided into three different styles. They are (1) Gat(립)- Cheop-Ri (2) Bung-Geo-Ji(단립)-Chang-Ui(창의) (3) Gat- Kwoe-Ja(쾌자) styles.

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Developed Type in the Managed Structured System Programming of Hybrid Web in .NET Framework Environment-Centric of Smart Web (.net Framework 환경에서 하이브리드 웹 기반의 매니지드 구조화 시스템 프로그래밍 개발방식-스마트 웹 중심으로)

  • Jang, Seung-Young
    • Journal of the Korea Society of Computer and Information
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    • v.18 no.4
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    • pp.141-152
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    • 2013

  • The current web implementation largely falls into process-oriented and object-oriented methods. Both ways implement the programs to be used for simple design of external outfit and auxiliary function of hybrid webs and it might lead to cost problems arising from waste of time and man-power to develop with it. Therefore, managed structural system programming which can be applied under .NET framework is suggested in a bid to solve these problems. The structural system design method under .NET environment by applying CS concept prefers to adopting the optimized design configuration suited to proper interfaces of UI configuration, which offers the environment to maintain the inheritance relationship by taking form of the balanced class allotment by domain, and continue to keep the connectivity between UX and UI which leads to application of interface of UX objects as form of objects through connection with objects in class design process. This development method enables programs to be implemented focused on representation methods of UI and UX, and helps relieve much of the burden on development costs.

  • https://doi.org/10.9708/jksci.2013.18.4.141 인용 PDF KSCI