In Situ Photo-chemically Assisted Fabrication of Nanosilver/Cresol Epoxy Acrylate Composite Film

• Main Authors: Pin-Jing Su, 蘇品境
• Other Authors: 鄭文桐
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/58286116784900521910

碩士 === 國立中興大學 === 化學工程學系所 === 101 === Environmental protection consciousness gains ground, it plays an important role that how to reduce energy consumption in all aspects. The UV curing method can be increased the heat dissipation with adding metal composite materials. It is an important issue that taking the UV curing and in situ method to synthesis the thin film of metal nanocomposite. The compositions in this study are resin, solvent, monomer, photoinitiator and AgNO3, which use in situ photo-chemically assisted fabrication of nanosilver/ cresol epoxy acrylate composite film, not adding additional silver. Ethylene glycol is not only as a solvent but also be a reducing agent to restore the silver ions to the silver nanoparticles without having to separately add the reducing agent and solvent. The experiments is using UV exposure to provide energy for initiator and ethylene glycol which produces the free radicals and promotes a monomer of trimethylolpropane triacrylate(TMPTA) to cross linked reaction and synthetic silver nanoparticles. First, we have used in-situ photochemical assisted preparation of composite films and used UV-visible, FESEM and XRD analysis, in order to inspect and verify formulation and validation the process conditions in this research, which has been succeed to synthesis the silver nanoparticles with photosensitive polymer film to form nanosilver/cresol epoxy acrylate composite film. Then use the static Taguchi method which is larger the better mechanism to experiment and draw out S/N ratio response graph of control factors. This article summarizes the following two important results: (1)In the case of different formulation conditions, the monomer and the resin content decreased, in order to get higher absorption value in the (UV-visible) of the wavelength characteristic in silver nano-particles, and increased the content of the silver nano-particle. On the contrary, the content of photo-initiator and the thickness are progressively decreasing. When the maximum UV absorption wavelength of the photo-initiator Irgacure500 is 250nm, which has been shown at larger energy wavelength for UV exposure machine, compared to the maximum UV absorption wavelength of the Darocur4265 is 240nm, it can obtain higher the characteristic wavelength absorption values of silver nanoparticles for UV-vis. (2)In the case of different process conditions, when the angular speed increased to 9000rpm, the average thickness value successfully reduced to 5μm, then in the same film thickness but different experiment conditions, which the silver nanoparticles UV-vis absorption value increased from the 1.325 to 2.188, the value of roughness enhanced from 0.2086nm to 0.2631nm. With the exposure energy raised from 0.6J/cm2 to 12J/cm2, the particle size of silver nanoparticles increased from 17nm to 23nm, which the composite film was observed in cross section by the FESEM. Then using EDS analyzes for the same samples, silver nanoparticles content increased from 2.45% to 3.82%. In addition to TGA showed that the pyrolysis temperature decreased from 227 ℃ to 207 ℃. Finally, the average grain size of the diffraction peaks (111) increased from 2.08nm to 4.88nm by X-ray diffraction.