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- 주제어 : PVC gel (검색결과 8 건)
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아세틸 트라이뷰틸 구연산 가소제를 이용한 PVC 겔 기반 마찰전기 나노발전기 개발
박도혜,박효식,이주혁 한국전기전자재료학회 2023 전기전자재료학회논문지 Vol.36 No.1
A triboelectric nanogenerator (TENG) is a device that converts mechanical energy into electrical energy, and has been considered as a substitute for continuous power supply due to its high performance, simple structure and eco-friendliness. Recently, it is important to develop a TENG using a non-toxic material in order to use it as a power source for wearable, attachable, and body-embeddable electronics. Here, we developed a human friendly TENG using polyvinyl chloride (PVC) gel containing acetyl tributyl citrate (ATBC), a non-toxic plasticizer. PVC gels were fabricated using various ratios of PVC and ATBC, and optimized by investigating dielectric properties, surface potential, output performance, and durability. The PVC gel based TENG generates output signals of 73 V and 4.3 μA, i.e., a 5-fold enhancement in the output power compared to pristine PVC-based TENG. In addition, the PVC gel can be stretched over 500% of strain. This study is expected to be helpful in the future development of non-toxic wearable TENG.
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Alaa Mohammed,Mohammed Kadhom,Marwa Fadhil,Alhamzah D. Hameed,Ahmed Imad,Ahmed Alamiery,Muna Bufaroosha,Rahimi M. Yusop,Ali Jawad,Emad Yousif 한국분석과학회 2024 분석과학 Vol.37 No.4
As polymers became very important in our lives, their negative impact on general health and the environment raised a serious issue. Here, enhancing their life term is presented as a compromise solution between the need and harm. In the study, six PVC films, the plain and five filled with improvers, underwent radiation exposure for 300 hours at room temperature to investigate their photodegradation rates. The modified films were embedded with organotin(IV) complex derivatives (Ph3SnL, Ph2SnL2, Bu3SnL, Bu2SnL2, and Me2SnL2 (where L is levofloxacin)), and their effectiveness was evaluated. The PVC films were compared before and after exposure to various tests including UV-Vis spectroscopy, gel content analysis, theoretical calculations, and EDX microscopy. Findings indicated that the presence of organotin(IV) complex derivatives, particularly Ph3SnL, notably decreased UV light absorbance and the amount of gel content in PVC sheets in comparison to untreated PVC. Furthermore, EDX analysis showed that the PVC-Ph3SnL blend exposed to radiation exhibited the highest chlorine content, reaching 30 %. This blend demonstrated superior efficacy in stabilizing the polymeric materials.
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정은진(Eun-Jin Jung),허용해(Yong Hae Heo),정용주(Yongju Jung),김상연(Sang-Youn Kim),진경복(Kyoungbog Jin) 한국디지털콘텐츠학회 2024 한국디지털콘텐츠학회논문지 Vol.25 No.3
This study proposes a compact landscape illumination consisting of an electro-active varifocal lens, a laser, and a housing. The varifocal lens was developed using a polyvinyl chloride (PVC) gel-based electroactive polymer and a printed circuit board having a central hole, the perimeter of which was coated with copper. Depending on the applied voltage, the shape of the varifocal lens changed from convex to planar, which determined whether the light generated by the laser was collected or spread. Experiments were conducted to verify the mechanical, optical, and dielectric properties of the PVC gel. Another experiment investigated whether the shape of the PVC gel-based proposed lens changed from convex to planar, observing that the amount of convergence (or dispersion) of the light from the compact landscape illumination can be controlled by applying a voltage.
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Sol-Gel Transition in Di-(2-ethylhexyl) phthalate-Plasticized Poly(vinyl chloride)
Lee, Chang-Hyung,Nah, Jae-Woon,Cho, Kil-Won,Kim, Seong-Hun,Hahn, Ai-Ran Korean Chemical Society 2003 Bulletin of the Korean Chemical Society Vol.24 No.10
The gelation for di-(2-ethylhexyl) phthalate (DEHP)-plasticized poly(vinyl chloride) was studied by measuring time-resolved small-angle X-ray scattering (SAXS) and a flow of the solutions in test tube. It was found that for the gelation there were three regimes. At Regime I, the solution rapidly changed to a gel, and the SAXS intensity showed a peak and the peak intensity increased, keeping the peak angle constant. Applying the SAXS intensity to the kinetic analysis of the liquid-liquid phase separation, it was revealed that the spinodal decomposition proceeded to develop a periodic length of 29.9 nanometer in size, a hydrogen-bonding-type association in polymer rich phase followed, and then it induced fast gelation rate. At Regime II, the gelation slowly occurred and the SAXS intensity was not observed, suggesting that a homogeneous gel network was formed by a hydrogen-bonding. At regime III, the solution was a homogeneous sol.
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Drying Characteristics of Particles using Thermogravimetric Analyzer
Park, Yeong-Sung,Shin, Hyun Nam,Lee, Dong Hyun,Kim, Duk Joon,Kim, Ji-Heung,Lee, Young Kwan,Sim, Sang Jun,Choi, Kyong-Bin 한국화학공학회 2003 Korean Journal of Chemical Engineering Vol.20 No.6
The drying characteristics (critical moisture content, equilibrium moisture content, constant drying rate and effective diffsivity) of various particles (gypsum, millet, polyvinyl chloride and silica gel) using a thermogravimetric analyzer were measured. The experiments were performed in the gas temperature range of 40 to 100 ℃ under isothermal conditions. The drying rate curve was mainly dependent on the moisture content, particle size, gas temperature and the internal structure of the solid particles. The equilibrium moisture content of solid particles decreased with increasing gas temperature, while the critical moisture content and the effective dispersion coefficient increased with increasing gas temperature. The effective diffusion coefficients of both PVC and gypsum particles were not able to be determined by Fick's law since the experimental data were not well matched with the model predicted values, which consisted of the drying time in the falling-rate drying period.
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