黑米色素的性质及光稳定化剂的研究

研究了黑米色素的性质和光降解动力学方程 ,以及黑米色素的光稳定化剂对色素的辅助成色和护色的影响。结果表明 ,黑米色素光降解服从零级反应动力学方程 ,添加黄酮化合物及改性黄酮化合物可使黑米色素对光稳定性有较大提高     

Plasma modification of diamond surfaces

Because of its extreme hardness, diamond is a very interesting material for many industrial applications. One way to extend the field of diamond application and optimize the process conditions in diamond tool production is to enhance its surface reactivity. Low-pressure oxygen-plasma treatments were applied to equip the diamond surfaces with chemically reactive groups to improve their adhesion properties. XPS and DRIFT spectroscopy investigations showed that oxygen plasmas were suitable to oxidize the diamond surface. Combining derivatization reactions and solvatochromic dye adsorption studies, the introduction of alcoholic groups was confirmed. Besides the surface oxidation, the plasma treatment initiates decomposition of the diamond lattice which is followed by a re-arrangement of the carbon atoms in a graphite-like structure. The planar graphite structure supports the formation of carbonyl groups.     

Modeling and Analysis of the Irradiance of Incipient Curing Light Reaching the Adhesive–Workpiece Interface Within a LAAG Joint

Light Activated Adhesive Gripper (LAAG) workholding is a technology used to hold workpieces for manufacturing processes. This paper presents a modeling technique for predicting the irradiance of incipient curing light reaching the adhesive–workpiece interface. It also describes an experimental methodology that can be used to derive the model coefficients for any arbitrary selection of curing lamp, gripper pin and adhesive. Lastly it provides experimental evidence that optical transmission loss increases dramatically during photo-polymerization. This increase is most likely due to increased ray scattering due to shrinkage void formation and densification of the adhesive matrix.