섬광의 복사온도 측정 장치의 설계 및 제작

진정호,한승오,양희원,박승만,Jin, Jung-Ho,Han, Seungoh,Yang, Hee Won,Park, Seung-Man 한국광학회 2015 한국광학회지 Vol.26 No.1

섬광의 복사온도를 측정 할 수 있는 장치를 설계하고 제작하였다. 본 논문에서는 중 원적외선 영역에서 광원의 스펙트럼 복사휘도(spectral radiance)를 측정하여 두 영역의 복사휘도 비로부터 섬광의 복사온도를 구할 수 있는 장치를 설계 및 제작하였다. 중 원적외선 영역에서 파장에 따른 복사휘도를 측정하기 위하여 광학적 대역 투과필터로 입사광을 파장에 따라 분할하고 각각의 파장으로 분할된 광을 동시에 적외선 검출기로 검출하여 입력광의 파장에 따른 복사휘도를 측정하였다. 제작된 장비로 섬광의 온도를 측정한 결과 1393K와 1455K의 온도를 얻었다. 제작된 복사온도 측정 장치는 섬광의 광원 정보를 파악하는데 중요하게 활용될 수 있으며, 섬광의 효과를 위한 M&S에 활용될 수 있다. The design and implementation of a radiative temperature measurement system for a flash light are carried out. Since a massive amount of energy is emitted within a very short time, it is impossible to measure the temperature of a flash with a conventional method. It is also irrelevant to measure one with an optical noncontact method. In this paper, a radiative temperature measurement system using the ratio of spectral radiances over mid- and long-wavelength infrared (IR) is designed and implemented. The implemented system utilizes optical bandpass filters to divide the wavelengths within the mid- and long-wavelength IR ranges, and pyroelectric IR detectors to measure the incident optical power of each wavelength-divided channel. It is shown that the measured radiative temperature of a flash is in the range of 1393 to 1455 K. This temperature-measurement system can be utilized to obtain information about the spectral radiance of a flash as a light source, which is of crucial importance to approaching the modeling and simulation of the various effects of a flash.

Chitin Nanofibers: A Renewable Building-blocks for Green Electronics and Energy Applications

진정호 한국고분자학회 2018 한국고분자학회 학술대회 연구논문 초록집 Vol.43 No.1

테일러-쿠테 유동 및 유체충돌 분쇄시스템을 통한 누에고치 실크 나노섬유화

진정호,김지혜 한국키틴키토산학회 2023 한국키틴키토산학회지 Vol.28 No.2

In this work, we report on the preparation of silk nanofibers using a combination of two top-down nanofibrillation techniques, Taylor-Couette flow (TCF) and aqueous counter-collision (ACC). The ACC system was used for the main nanofibrillation of silk raw material (cocoon), and the TCF system was introduced as a pretreatment. The TCF treatment time and the number of ACC treatments were controlled as variables to increase the nanofibrillation efficiency. SEM analysis showed that the size and diameter of the silk nanofibers were effectively reduced as the TCF treatment time and the number of ACC passes increase. In particular, the TCF-based pretreatment enabled the direct processing of ACC with a concentrated silk suspension (0.3 w/v%), while only 0.1 w/v% was the highest condition possible without the TCF pre-treatment. This study suggests the possibility of improving the production efficiency of silk nanofibers by utilizing both TCF and ACC.

택배 브랜드 이미지 제고를 위한 패키지디자인 연구

진정호 한국브랜드디자인학회 2008 브랜드디자인학연구 Vol.6 No.1

TV 홈쇼핑, 인터넷 쇼핑을 통한 전자상거래가 확대됨에 따라 택배서비스에 대한 수요가 급신장하고 업체들 간의 경쟁은 치열하게 되었다. 택배 업체들은 치열한 경쟁 속에서 우위를 차지하기 위한 강력한 브랜드 이미지 구축전략이 필요하다. 상품을 선택하는데 있어 브랜드 이미지는 중요한 역할을 하며, 브랜드 이미지에 큰 영향을 주는 요소가 패키지디자인이라는 것은 주지의 사실이다. 따라서 본 연구는 택배 패키지디자인을 통해 택배회사의 이미지를 제고할 수 있는 방법과 함께 회사의 브랜드를 널리 알리는 홍보 효과를 극대화하는 관점에서 개선방안을 제시하고자 진행되었다. 1차적으로 문헌적 연구를 수행하였으며, 연구 범위는 국내 매출액기준 상위 3개사 현대택배, 한진택배, 대한통운택배로 하였다. 연구의 결과, 현대택배 패키지디자인의 색채와 타이포그래피는 주목성이 높았으나 일러스트레이션과 레이아웃에서는 주목성이 낮았다. 대한통운택배와 한진택배의 주목성이 타이포그래피에서 낮게 분석되었다. 따라서 현대택배는 주목성을 높이기 위하여 일러스트레이션과 레이아웃을 개선하여 야 하며, 대한통운택배와 한진택배는 주목성을 높이기 위하여 타이포그래피를 개선하여야 한다. 현대택배 패키지디자인에서 브랜드명과 슬로건은 홍보효과가 높았으나, 마크와 이미지, 레이아웃에서는 한진택배의 홍보효과가 높게 분석되었다. 따라서 홍보효과를 높이기 위하여 한진택배에서는 슬로건을, 대한통운택배에서는 마크, 이미지, 레이아웃을 개선하여야 할 필요성이 있다고 사료된다. 그리고 현대택배에서는 마크, 이미지, 색상에서 개선의 필요성이 제기된다. Successful results of selling product are dependent on the appealing brand image of individual products. The product with brand image power takes a role as a valuable property for a company. Creating unique and differentiated brand image can make the brand market leader. The purpose of this study is to increase the brand image and the advertising impact by package design of top 3 door-to-door delivery service company in Korea, HYUNDAI LOGISTICS CO. LTD(HYUNDAI), HANJIN EXPRESS(HANJIN), KOREA EXPRESS(KOREA). In the preliminary survey t-test of evidence was made use of to measure the propriety of the question contents, and cronbach's alpha coefficient was used to measure the trust degree. And in the principal survey the reexamination was made through mail delivery by using the question papers corrected and complemented by the outcome of the preliminary survey. And the computer program used for this analysis was SPSS/PC+. The results of this study were as follows. First, HYUNDAI have to improve the illustration and the lay-out of it's for increasing attention in package design, and HANJIN and KOREA have to make better the typography of there's for the better notice in package design. Second, for increasing the brand image and the advertising impact HANJIN have to modify the slogan and KOREA have to correct the mark, the image, the lay-out. Also HYUNDAI must to make better the mark, the image, the colour.

나노셀룰로스 기반 산소차단성 생분해 투명 필름

진정호 한국공업화학회 2021 공업화학전망 Vol.24 No.3

이축압출을 통한 베타-키틴나노섬유 강화 PLA 복합체 제조

진정호,송명오,김지혜,이진환 한국키틴키토산학회 2023 한국키틴키토산학회지 Vol.28 No.3

In this study, we report on the fabrication of PLA composites incorporating β–chitin nanofiber (ChNF) as nanofiller for improving mechanical ductility of PLA. Raw β–chitin powder was sourced from squid pen, and then chemically modified with succinyl anhydride followed by nanofibrillation to obtained succinylated ChNF (SChNF). After compounding PLA with SChNF at 1 wt%, 2 wt% and 3 wt% using TSE (twin screw extrusion), the mechanical properties of the specimens produced by injection molding are evaluated in tensile testing. As a result, at 1wt% loading of SChNF, the PLA/SChNF composite showed improved elongation at break (28.6 %) and toughness (8.97 MJ/m3 ), while not compromising its tensile strength compared to neat PLA (63.5 MPa). Tensilefractured surfaces were analyzed by SEM to determine the effect of SChNF filler on the improved mechanical properties

수중대향충돌 방식을 이용한 숙신산 무수물 개질 β-키틴 나노섬유의 제조

진정호,Lee Jongmin,Seo Wonjeong,Song Myeong-Oh,Oh Eunchan 한국키틴키토산학회 2022 한국키틴키토산학회지 Vol.27 No.2

In this study, we report on the production of succinylated β-chitin nanofibers (ChNF) via aqueous counter collision (ACC) method. Succinic anhydride (SA) mediated chemical modification is known as an effective nanofibrillation strategy for typical natural polysaccharides through the surface carboxylation, which has attracted attention due to its relatively mild characterisitics, such as non-toxicity. Using the combined physico-chemical treatment of SA and ACC, the succinylated β-chitin nanofiber (β-SChNF) was successfully prepared as a uniform hydrocolloidal suspension. The SEM and AFM analysis showed that the diameter of the SChNF ranged from 14 nm to 30 nm. The XRD and FT-IR analysis were used to confirm that the original crystal and chemical structure of chitin were maintained even after the physico-chemical nanofibrillation. We also fabricated a transparent film from the SChNF which showed a typical diameter-dependent optical transmittance; that is, the higher the number of ACC pass (i.e., smaller diameter of SChNF), the greater the optical transparency (80%). Our results show that SA chemical pre-treatment of β-chitin can boost successful nanofibrillation.

테일러-쿠테 유동 및 유체충돌 분쇄시스템을 이용한 α-키토산 나노섬유 제조

진정호 한국키틴키토산학회 2023 한국키틴키토산학회지 Vol.28 No.1

In this study, we report on the preparation of α-chitosan nanofibers using a combination of two different topdown nanofibrillation techniques based on Taylor-Couette flow (TCF) and aqueous counter collision (ACC) system. The TCF system harnesses a TCF-assisted turbulent flow of suspension for pre-treatment of the α-chitosan raw material, which is then further nanofibrilized using the ACC system. Both the processing duration time of the TCF along with the number of passes for ACC treatment were controlled as variables for optimal nanofibrillation degree and efficiency. In SEM analysis, it was confirmed that the size and the diameter of the α-chitosan aggregates and/or nanofibers were effectively reduced with the TCF processing time and ACC pass numbers. In particular, through the TCF-based pretreatment, the processing of ACC-based nanofibrillation was possible even with a high suspension concentration, which is task not readily achievable using the ACC method solely. This study proposes the possibility of improving the production efficiency of α-chitosan nanofibers by utilizing both TCF and ACC.

Rollable Transparent Glass-fabric Reinforced Hybrimer(GFRHybrimer) Sub-strate for Flexible Devices

진정호,고지훈,양승철,배병수 한국고분자학회 2010 한국고분자학회 학술대회 연구논문 초록집 Vol.2010 No.10

Functional materials & green electronics from natural biopolymers

진정호 한국공업화학회 2021 한국공업화학회 연구논문 초록집 Vol.2021 No.0