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TiO2 필러를 포함하는 PEO/PMMA 고분자 복합체 전해질의 이온전도도 및 결정화도
이륜규 ( Lyung Yu Lee ),박수진 ( Soo Jin Park ),김석 ( Seok Kim ) 한국화학공학회 2011 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.49 No.6
In this work, polymer composite electrolytes were prepared by a blend of pol (methyl methacrylate)(PMMA) and poly(ethylene oxide) (PEO) as a polymer matrix, propylene carbonate as a plasticizer, LiClO4 as a salt, and by containing a different content of TiO2, by using the solution casting method. The crystallinity and ionic conductivity of the polymer electrolytes was evaluated using X-ray diffraction(XRD) and AC impedance method, respectively. The morphology of composite electrolyte film was analyzed by SEM method. From the experimental results, by increasing the TiO2 content, crystallinity of PEO was reduced, and ionic conductivity was increased. In particular, the ionic conductivity was dependent on the content of TiO2 and showed the highest value 15 wt%. However, when TiO2 content exceeds 15 wt%, the ionic conductivity was decreased. According to the surface morphology, the ionic conductivity was decreased because the polymer composite electrolytes showed a heterogenous morphology of fillers due to immiscibility or aggregation of the filler within the polymer matrix.
혈액투석 환자의 동정맥루 천자 시 통증완화를 위한 온요법과 냉요법의 효과
최송희,백경희,이정영,임현빈,김현정,김윤수,이륜규,권용은 병원간호사회 2006 임상간호연구 Vol.12 No.1
Purpose: The purpose of this study is to examine the effect of warm and ice application verified to reduce the pain caused by arteriovenous fistula needling under hemodialysis. Method: This study was performed with the one group pretest-posttest design from pre-experimental design. A total of 34 patients who have matured arteriovenous fistula were given an objective pain score, subjective pain score(VAS) and physiologic index respectively 5 times pre-experiment, post warm application and post ice application. The data were analyzed with SPSS win 12.0 program by using descriptive statistics, a repeated measure ANOVA and a paired t-test. Result: The post treatment of warm and ice application reduced the subjective and objective pain rather than pre-treatment when they experienced arteriovenous fistula needling. Concerning the effect of warm and ice application, there turned out to be no significant difference in pain score. Regarding warm and ice application, the hypothesis that physiologic index, such as blood pressure and pulse, was not significantly different between pre needling and post needling and it was partially verified. Conclusion: The findings suggest that both of warm and ice application were effective ways to relieve pain. Therefore, according to characteristic and tendency of patients, it can be recommended to choose warm or ice application