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고분자 분쇄 기술을 활용한 고체 알칼리연료전지용 이오노머 바인더 용액 개발
신문식,김도형,강문성,박진수,Shin, Mun-Sik,Kim, Do-Hyeong,Kang, Moon-Sung,Park, Jin-Soo 한국전기화학회 2016 한국전기화학회지 Vol.19 No.3
본 연구에서는 고체알칼리 연료전지용 이오노머 바인더 용액 제조를 위하여 poly(2,6-dimethyl-1,4-phenylene oxide)(PPO)를 동결 분쇄하고 4급 암모늄화 반응을 진행하여 음이온 전도성 이오노머(quaternized PPO, QPPO) 용액을 제조하였다. QPPO 이오노머 바인더 용액의 종류를 고분자의 분쇄 시간을 통하여 제조하였고, 이에 따른 분산도, 입자의 크기 및 전기화학적 성능 등을 분석하였다. 이를 통해 기존의 비 분쇄 고분자를 활용하여 제조한 이오노머 바인더 용액보다 분쇄 고분자를 활용한 이오노머 바인더 용액이 높은 고분자 분산도와 낮은 입자 크기를 확보하였다. 제조한 이오노머 바인더 용액(BPPO-G120s)의 최대 이온전도도는 $0.025S\;cm^{-1}$이었으며, 이온교환용량은 $1.26meq\;g^{-1}$을 보였다. In this study, an anion-exchange ionomer solution was prepared by grinding poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) in liquid nitrogen for solid alkaline fuel cells (SAFCs). Type of quaternized PPO (QPPO) solutions was controlled by grinding time. The ionomer binder solutions were characterized in terms of dispersity, particle size, and electrochemical properties. As a result, ionomer binder solutions using grinded polymer showed higher dispersion and smaller particle size distribution than that using non-grinded polymer. The highest ionic conductivity and IEC of the membrane recast by using BPPO-G120s were $0.025S\;cm^{-1}$ and $1.26meq\;g^{-1}$, respectively.
탄화수소계 전해질막 기반 막-전극접합체 제조를 위한 전사 기술
신문식 ( Mun-sik Shin ),송찬호 ( Chan-ho Song ),강문성 ( Moon-sung Kang ),박진수 ( Jin-soo Park ) 한국신·재생에너지학회 2017 신재생에너지 Vol.13 No.3
This study investigated the effects of the proton-exchanging conditions of the sulfonated poly (ether ether ketone) (sPEEK) membranes on the decal transfer rate. Various pre-treatment conditions of proton-exchanging the sPEEK membranes were used in terms of the acid concentration, temperature and time. The sPEEK membranes were analyzed to examine the effects of the acid concentration, temperature, and immersion time. The proton conductivities of the membranes were evaluated. The membrane electrode assembly, (MEA) of sPEEK membranes were fabricated by the decal transfer method. As a result, the pre-treated sPEEK membranes showed the highest proton conductivity (0.044 S cm<sup> -1</sup> , 0.16 meq g<sup> -1</sup> ) immersed in 0.5 M H<sub>2</sub>SO<sub>4</sub> for 2h, and it brought about the highest cell performance (0.39 A cm <sup>-2</sup> @ 0.6 V, 0.269 W cm <sup>-2</sup> ) due to a decrease in Ohmic resistance. Among the conditions for pre-treatment, the concentration of the pre-treatment acid solutions was found to be the most significant factor determining the proton conductivity of the membranes.
이종희,여운상,곽도연,김준환,송유천,김춘송,신문식,Lee, Jong-Hee,Yeo, Un-Sang,Kwak, Do-Yeon,Kim, Joon-Hwan,Song, Yu-Cheon,Kim, Choon-Song,Shin, Moon-Sik 한국작물학회 2006 Korean journal of crop science Vol.51 No.suppl1
화영벼와 일품벼를 이용하여 벼멸구에 피해에 따른 농업적 특성, 수량 및 품질에 미치는 영향을 검토한 결과는 다음과 같다. 1. 벼멸구 피해지에서 간장 수장 및 수당립수는 차이가 없었으나, 등숙율 및 쌀수량은 무피해구에 비해 감소되어 출수기 이후의 피해가 큰 것으로 나타났다. 2. 현미의 외관품질 분석 결과 벼멸구 피해지의 정상립 비율은 감소하였고, 미숙립, 피해립 및 사미의 발생은 증가되었다. 3. 벼멸구 피해지의 쌀의 이화학적 특성 분석 결과 아밀로스 함량은 차이가 없었으나, 단백질 함량은 높았다. 최고 점도는 낮고 치반점도는 높았으며 취반시 호화특성이 불량한 것으로 나타났으며, 식미치는 낮아졌다. This study was carried out to investigate the change yield and grain quality in rice caused by damages of brown planthopper (Bph) on major agronomic traits at the ripening stage. A major agronomic traits such as culm length, panicle length, number of panicle and number of grain per panicles was no-significant difference compared hopperburn area (HBA) and moderately damaged area (MDA) by brown planthopper with non-damaged area (NDA). but, the ripeing ratio and yield in HBA and MDA was significantly decreased. The perfect rice of brown rice in HBA and MDA was also lowered than the NDA and the immatured grain among imperfect rice in damaged area by BPH was significantly increased than in the NDA. Among the traits related with palatability of cooked rice, the amylose content was not affected by damage of brown planthopper, whereas, the protein content was significantly increased in the HBA and MDA. additionally, Peak viscosity in HBA and MDA is lower than the NDA, and setback was increased. In most cases, there was negative on yield and grain quality by the damage of brown planthopper at the ripening stage. Thus, the rice product harvested in damaged area should be separated with that in non damaged area for grain market quality of milled rice.
연구보문 : 벼 직파 품종육성을 위한 기존 품종의 저온발아성 분석
고종철 ( Jong Cheol Ko ),김우재 ( Woo Jae Kim ),백만기 ( Man Kee Baek ),손지영 ( Ji Young Shon ),하기용 ( Ki Yong Ha ),강현중 ( Hyeon-jung Kang ),신문식 ( Moon Sik Shin ),고재권 ( Jae Kwon Ko ) 한국국제농업개발학회 2011 韓國國際農業開發學會誌 Vol.23 No.1
This study was carried out for breeding of direct seeding cultuvars. In direct seeding cultivation, low temperature germination rate is very important character for stable emerge of early seedlings. In this study low temperature germination rate(LTGR) were tested using 89 rice cultivars breeded from 1994 to 2008 year. The results are summarized as follows. Rice cultivars were breeded after 2004 year LTGR was higher than before 2003 year breeded cultivars. In med-late maturity cultivars LTGR was slightly higher than early or medium maturity cultivars, but there was no significance. Premium quality or high quality cultivars showed more high LTGR than superyield or stability cultivars. The LTGR of rice cultivars breeded in Iksan(NICS department of rice and winter cereal crops) were higher than other institutes breeded cultivars.