The objective of this present study is to manufacture a new silicone-based adhesive which is used for gluing and bonding the second optical elements (SOE) with Concentrating Photovoltaic solar cell (CPV) in order to g...The objective of this present study is to manufacture a new silicone-based adhesive which is used for gluing and bonding the second optical elements (SOE) with Concentrating Photovoltaic solar cell (CPV) in order to guarantee a thickness that can provide a good silicone adherence to obtain long term stability and keeping a good solar transmittance performance, too. This new adhesive is made up of a mixture of silicone and transparent glass balls. The experimental part consists of the choice of the best size of glass balls with the suitable proportion of the glass balls weight in the mixture. For this purpose, ten samples were manufactured for every category of glass balls and weight ratio. Glass ball sizes between 100 and 1100 μm, and weight ratios between 1 and 10% were analyzed. For each category of glass balls, four proportions were mixed with the silicone. The thicknesses and transmittance of every sample were measured with appropriate instruments. The experimental results illustrate that the mixture containing balls with sizes inferior to 106 μm, is the best mixture which assures adhesive minimum thickness value necessary for an efficient mechanical bond and preserves also a good transmittance of solar irradiance.展开更多
目的研究IPS e.max二矽酸锂基铸瓷厚度与延长光照对自粘接双固化树脂水门汀Rely X U200聚合程度的影响。方法制备Rely X U200树脂试件50个,随机分为10组。分别透过盖玻片(对照组)及厚度为1、2、3、4 mm的IPS e.max瓷片(实验组)接受LED...目的研究IPS e.max二矽酸锂基铸瓷厚度与延长光照对自粘接双固化树脂水门汀Rely X U200聚合程度的影响。方法制备Rely X U200树脂试件50个,随机分为10组。分别透过盖玻片(对照组)及厚度为1、2、3、4 mm的IPS e.max瓷片(实验组)接受LED光固化灯传统光照(20 s)及延长光照(40 s)2种模式固化,红外光谱法测算聚合转化率(DC),对统计数据行双因素方差分析。结果随着IPS e.max瓷片厚度的增加,两种光照模式下Rely X U200 DC%均呈下降趋势(P<0.001)。相同厚度时,延长光照组DC%高于传统光照组(P<0.001)。结论随着铸瓷厚度增加,自粘接树脂水门汀的聚合程度降低,适当延长光照有助于聚合程度的提升。展开更多
目的:比较3种自酸蚀粘结剂在不同剩余牙本质厚度的粘结强度。方法:选取新鲜拔除的第一前磨牙24个,磨除冠部釉质,显露浅层牙本质后,随机分3组(n=8),分别使用Opti Bond Versa(OV)、Clearfil SE Bond(SE)、G Bond(GB)粘结剂,然后用P60复合...目的:比较3种自酸蚀粘结剂在不同剩余牙本质厚度的粘结强度。方法:选取新鲜拔除的第一前磨牙24个,磨除冠部釉质,显露浅层牙本质后,随机分3组(n=8),分别使用Opti Bond Versa(OV)、Clearfil SE Bond(SE)、G Bond(GB)粘结剂,然后用P60复合树脂修复堆塑,作截面积约为1.0 mm×1.0 mm的柱形试件。测量样本粘结界面与髓室顶部之间距离即为剩余牙本质厚度(RDT)(≤2 mm为深层牙本质,≥3 mm为浅层牙本质),进行微拉伸试验测试粘结强度并在体视显微镜下观察试件断裂面。结果:OV、SE、GB在浅层牙本质的粘接强度(MPa)分别为44.96±2.05,29.40±1.77和16.38±1.34(P<0.05);在深层分别为32.60±1.58,22.79±1.19和11.98±0.91(P<0.05)。3种自酸蚀粘结剂在浅层牙本质的粘结强度均高于深层(P<0.05),在浅层和深层牙本质的粘结强度比较均为OV最高,SE次之,GB最低(P<0.05);3组样本的断裂多发生在粘结界面。结论:OV对牙本质的粘结强度最高,SE次之,GB最低;3种自酸蚀粘结剂在浅层牙本质的粘结强度均高于深层牙本质。展开更多
文摘The objective of this present study is to manufacture a new silicone-based adhesive which is used for gluing and bonding the second optical elements (SOE) with Concentrating Photovoltaic solar cell (CPV) in order to guarantee a thickness that can provide a good silicone adherence to obtain long term stability and keeping a good solar transmittance performance, too. This new adhesive is made up of a mixture of silicone and transparent glass balls. The experimental part consists of the choice of the best size of glass balls with the suitable proportion of the glass balls weight in the mixture. For this purpose, ten samples were manufactured for every category of glass balls and weight ratio. Glass ball sizes between 100 and 1100 μm, and weight ratios between 1 and 10% were analyzed. For each category of glass balls, four proportions were mixed with the silicone. The thicknesses and transmittance of every sample were measured with appropriate instruments. The experimental results illustrate that the mixture containing balls with sizes inferior to 106 μm, is the best mixture which assures adhesive minimum thickness value necessary for an efficient mechanical bond and preserves also a good transmittance of solar irradiance.
文摘目的研究IPS e.max二矽酸锂基铸瓷厚度与延长光照对自粘接双固化树脂水门汀Rely X U200聚合程度的影响。方法制备Rely X U200树脂试件50个,随机分为10组。分别透过盖玻片(对照组)及厚度为1、2、3、4 mm的IPS e.max瓷片(实验组)接受LED光固化灯传统光照(20 s)及延长光照(40 s)2种模式固化,红外光谱法测算聚合转化率(DC),对统计数据行双因素方差分析。结果随着IPS e.max瓷片厚度的增加,两种光照模式下Rely X U200 DC%均呈下降趋势(P<0.001)。相同厚度时,延长光照组DC%高于传统光照组(P<0.001)。结论随着铸瓷厚度增加,自粘接树脂水门汀的聚合程度降低,适当延长光照有助于聚合程度的提升。
文摘目的:比较3种自酸蚀粘结剂在不同剩余牙本质厚度的粘结强度。方法:选取新鲜拔除的第一前磨牙24个,磨除冠部釉质,显露浅层牙本质后,随机分3组(n=8),分别使用Opti Bond Versa(OV)、Clearfil SE Bond(SE)、G Bond(GB)粘结剂,然后用P60复合树脂修复堆塑,作截面积约为1.0 mm×1.0 mm的柱形试件。测量样本粘结界面与髓室顶部之间距离即为剩余牙本质厚度(RDT)(≤2 mm为深层牙本质,≥3 mm为浅层牙本质),进行微拉伸试验测试粘结强度并在体视显微镜下观察试件断裂面。结果:OV、SE、GB在浅层牙本质的粘接强度(MPa)分别为44.96±2.05,29.40±1.77和16.38±1.34(P<0.05);在深层分别为32.60±1.58,22.79±1.19和11.98±0.91(P<0.05)。3种自酸蚀粘结剂在浅层牙本质的粘结强度均高于深层(P<0.05),在浅层和深层牙本质的粘结强度比较均为OV最高,SE次之,GB最低(P<0.05);3组样本的断裂多发生在粘结界面。结论:OV对牙本质的粘结强度最高,SE次之,GB最低;3种自酸蚀粘结剂在浅层牙本质的粘结强度均高于深层牙本质。
