本文選題：LED封裝　切入點(diǎn)：苯基硅橡膠合成　出處：《上海應(yīng)用技術(shù)學(xué)院》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：功率型發(fā)光二極管(LED)以其高功效、快速響應(yīng)、節(jié)能、環(huán)保等優(yōu)良特性而得到人們廣泛地關(guān)注。而與普通LED相比較,大功率LED會(huì)產(chǎn)生更高的光強(qiáng)、從而發(fā)出更多的熱及更強(qiáng)的短波輻射,而過高的溫度會(huì)讓發(fā)光二極管加速失效,極大地降低了器件的使用壽命。所以迫切需要封裝材料具有保持可見光區(qū)高透明性的同時(shí)能夠?qū)ψ贤夤庥休^高的吸收率,以防止紫外線的泄露,并應(yīng)具有較強(qiáng)的耐紫外老化性能及高熱導(dǎo)率。有機(jī)硅具有優(yōu)異的耐候性、耐高低溫性、化學(xué)穩(wěn)定性等,并成為大功率LED封裝的首要選擇。然而,現(xiàn)有有機(jī)硅材料的光學(xué)性能及綜合性能有待進(jìn)一步提高,以滿足大功率LED封裝的需要。本文主要從兩個(gè)方面展開了研究工作。首先,為提高有機(jī)硅橡膠的光學(xué)性能,設(shè)計(jì)制備了高苯基硅橡膠及高苯基含氫硅油,并固化出高折射率的有機(jī)硅橡膠。以原料苯基三甲氧基硅烷(PTMS)、二苯基二甲氧基硅烷(DPDS)、二甲基二甲氧基硅烷(MSDS)、六甲基二硅氧烷(MM)、乙烯基三甲氧基硅烷(VTMO)口反應(yīng)工藝條件反應(yīng)溫度、反應(yīng)時(shí)間和催化劑用量因素設(shè)計(jì)正交實(shí)驗(yàn)合成高苯基硅橡膠,實(shí)驗(yàn)研究表明,高苯基硅橡膠對粘度和折射率影響最大的反應(yīng)配比為：PTMS:DPDS:MSDS:MM:VTMO=3:2:1.5:0.3:0.96(摩爾比),對所制得的硅橡膠具有較高的折射率(1.55)和粘度(18725/mPa·s)、以四甲基環(huán)四硅氧烷(D：)、甲基苯基硅氧烷環(huán)體(DMcPhn)、四甲基二硅氧烷(HMM)、反應(yīng)時(shí)間和反應(yīng)溫度為因素設(shè)計(jì)正交實(shí)驗(yàn)合成高苯基含氫硅油,實(shí)驗(yàn)研究表明,高苯基含氫硅油對粘度影響最大的條件為：DH4：DMcOhn：HMM=6：4：0(摩爾比),對所制得的硅橡膠具有較高的折射率(1.52)和粘度(1052/mPa·s)、其次,為提高所制備有機(jī)硅橡膠的綜合性能,采用具有不同功能的表面改性的納米粒子TiO2、SiO2、ZrO2和AlNaO6Si2與不同苯基含量的硅橡膠制備了納米復(fù)合材料,系統(tǒng)研究了納米粒子的種類及含量對高苯基硅橡膠和中苯基硅橡膠納米復(fù)合材料的機(jī)械性能、光學(xué)性能、介電性能、導(dǎo)熱性能的影響。研究表明：納米粒子經(jīng)KH550偶聯(lián)劑處理后,苯基硅橡膠納米復(fù)合材料的拉伸強(qiáng)度呈現(xiàn)先增大后減小的趨勢,當(dāng)納米Si02、Ti02和Zr02的含量為0.03wt%而A1Na06Si2含量為1wt%時(shí),所制得的納米復(fù)合材料具有較好的力學(xué)性能,分別為0.54MPa、059MPa、0.55MPa、0.54MPa。苯基硅橡膠納米復(fù)合材料的折射率隨著粒子添加量增加而增加,當(dāng)納米SiO2、TiO2、ZrO2和AlNaO6Si2含量為3wt%時(shí),所制得的納米復(fù)合材料具有較好的折射率,分別為1.587、1.573、1.571和1.566。在小添加量下(0.03wt%), AlNaO6Si2和納米Si02對高苯基硅橡膠折射率的提高更明顯,而對中苯基硅橡膠折射率起到平穩(wěn)提高的作用。苯基硅橡膠納米復(fù)合材料的介電常數(shù)隨著隨著粒子添加量增加而增加,且納米Si02和AlNaO6Si2對中苯基含量硅橡膠影響要大于高苯基硅橡膠。苯基硅橡膠納米復(fù)合材料的體積電阻率隨著粒子的添加量增加而增加,當(dāng)納米SiO2、TiO2、ZrO2和AlNaO6Si2的含量為3wt%時(shí),所制得的納米復(fù)合材料具有最高的體積電阻率,添加納米改性Zr02、Ti02的苯基硅橡膠復(fù)合材料的體積電阻率從2×1013Ω-cm分別增加到20×1013、40×1013Ω·2cm。而納米改性AlNaO6Si2、Si02的復(fù)合材料體積電阻率從2×1013Ω-cm分別增加到5×1013、6×1013Ω·cm。苯基硅橡膠納米復(fù)合材料的導(dǎo)熱率呈現(xiàn)先增加后減小的趨勢,當(dāng)納米ZrO2和AlNaO6Si2的含量為0.03wt%時(shí)而納米Ti02、Si02的含量分別為0.6 wt%,1%時(shí),所制得的納米復(fù)合材料具有最佳的導(dǎo)熱率,分別為0.306、0.436、0.339和0.464W.m-1.K-1。
[Abstract]:Power type light emitting diode (LED) with its high efficiency, fast response, energy saving, environmental protection and other excellent characteristics and get people's attention widely. Compared with ordinary LED, high power LED will produce a higher light intensity, thus make the shortwave radiation heat and more stronger, but too high temperature will make the light emitting diode accelerated failure, greatly reduce the service life of the device. So there is an urgent need to maintain and package materials with high visible light transparency to ultraviolet light has high absorption rate, to prevent the leakage of the UV, and should have strong ultraviolet aging resistance and high thermal conductivity. Silicone has excellent weatherability, high low temperature, chemical stability, and become the first choice for high power LED package. However, optical performance and comprehensive performance of the existing silicone materials needs to be further improved, to meet the needs of high power LED package . this article mainly from the two aspects of the research work. Firstly, in order to improve the optical properties of silicone rubber, preparation of high phenyl silicone rubber and phenyl hydrogen containing silicone oil, silicone rubber and curing a high refractive index material. With phenyltrimethoxysilane (PTMS), two two methoxy phenyl silane (DPDS), two methyl two methoxy silane (MSDS), six (MM), two methyl siloxane vinyl trimethoxysilane (VTMO) and reaction temperature, reaction time and catalyst dosage factors of orthogonal experimental design synthesis of phenyl silicone rubber. The experimental results show that the high rate of phenyl silicone rubber effects of composition on the viscosity and the maximum refraction was PTMS:DPDS:MSDS:MM:VTMO=3:2:1.5:0.3:0.96 (molar ratio), with high refraction of silicone rubber was prepared by the rate (1.55) and viscosity (18725/mPa - s), with four methyl siloxane ring four (D:), methyl phenyl silicone Siloxane ring (DMcPhn), two (HMM) four methyl siloxane, reaction temperature and reaction time for the synthesis of phenyl factors of orthogonal experimental design of silicone oil containing hydrogen, experimental results show that the high phenyl hydrogen containing silicone oil on the viscosity of the greatest impact conditions are as follows: DH4:DMcOhn:HMM=6:4:0 (molar ratio), with high refraction of silicone rubber prepared the rate (1.52) and viscosity (1052/mPa - s), secondly, in order to improve the overall performance of the preparation of silicone rubber, with different functions of surface modified nanoparticles TiO2, SiO2 nanocomposites were prepared by ZrO2 and AlNaO6Si2 with different content of phenyl silicone rubber system, studied the species and the content of nanoparticles of high mechanical properties, silicone rubber and silicone rubber nano composite material optical properties, dielectric properties, thermal conductivity effect. The study shows that nanoparticles by KH550 coupling agent, phenyl The tensile strength of silicone rubber nanocomposites increased first and then decreased, when the content of nano Si02, Ti02 and Zr02 for 0.03wt% and A1Na06Si2 content is 1wt%, the nano composite material with good mechanical properties, respectively 0.54MPa, 059MPa, 0.55MPa, 0.54MPa. index of phenyl silicone rubber nanocomposites the rate increases with the increase of nano particles, when SiO2, TiO2, ZrO2 and AlNaO6Si2 content is 3wt%, the nano composite material with good refractive index, respectively 1.587,1.573,1.571 and 1.566. in small amount (0.03wt%), AlNaO6Si2 and Si02 nanoparticles on phenyl silicone rubber to improve high refractive index more obviously, to improve the effect of smooth and in silicone rubber. The refractive index of phenyl silicone rubber nanocomposites with the dielectric constant increases with the increase of nano particles, and Si02 and AlNaO6Si2 The content of phenyl silicone rubber is greater than the impact of high phenyl silicone rubber. The volume resistivity of phenyl silicone rubber nanocomposites increased with the amount of particles increases, when the nano SiO2, TiO2, ZrO2 and AlNaO6Si2 content is 3wt%, the nano composite material with high volume resistivity, adding nano modified Zr02, volume resistivity of phenyl silicone rubber composite Ti02 from 2 * 1013 -cm were increased to 20 * 1013,40 * 1013. 2cm. and nano modified AlNaO6Si2, 2 * 1013 Omega -cm were increased to the thermal conductivity of 5 * 1013,6 * 1013. Cm. phenyl silicone rubber nanocomposites increased at first then decreases from the resistivity of Si02 composite material volume, when the content of nano ZrO2 and AlNaO6Si2 for 0.03wt% and Ti02 nanoparticles, the content of Si02 was 0.6 wt%, 1%, nano composites has the best thermal conductivity, respectively. 0.306,0.436,0.339 and 0.464W.m-1.K-1.

【學(xué)位授予單位】：上海應(yīng)用技術(shù)學(xué)院
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TQ333.93;TB33

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