Adhesion micro-bonding

M. Sarr, A.W. Kane, M. Mine, J. Vreven, K.L. van Landuyt, M. Peumans, P. Lambrechts, B. van Meerbeek, J. De Munck, Micro tensile bond strength and interfacial characterization of 11 contemporary adhesive systems bonded to bur-cut dentin. Open Dent. 35 (2010) 94-104. 

Casein is the major component (80 per cent) of milk, with molecular weights between 1 and 20kDa and includes four distinct types a-sl, a-s2, (3, and k. Casein is the predominant phosphoprotein that precipitates at pH 4.6 (20°C) and is characterized by an open, random coil structure. By treating acid-precipitated caseins with alkali solution caseinates are produced. Both caseins and caseinates form transparent films from aqueous solutions without any treatment because of their random coil nature and numerous hydrogen bonds. Caseins have shown to be useful in adhesives, micro encapsulation, food ingredients, and pharmaceuticals [31]. 

The following techniques are useful for analysis and charaterization for the sizing on the fibres SEM, IR and 6PC of extracts, IGC and DMA (T ) for the fibre-matrix bond micro bond, micro failure with SEM [2], confocal laser scanning microscopy [3] DMA, flexural strength, ILSS and impact of the uni-directional composites (fixed fibre length, orientation and volume fraction distributions). After this detailed analysis, the fibres are tested in their application, which is an injection moulded compound for thermoplasts, where the microstructure (fibre length, fibre orientation and fibre-fibre distance distributions) as well as the fibre- matrix adhesion determine the mechanical properties. 

Fu C, Rummler Z, Schomburg W (2003) Magnetically driven micro ball valves fabricated by multilayer adhesive film bonding J Micromech Microeng 13 96-102... 

PhUlips RJ (1990) Micro-channel heat sinks. In Bar-Cohen A, Kraus AD (eds) Advances in thermal modeling of electronic components and systems, vol 2, pp 109-184 Plosl A, Krauter G (1999) Wafer direct bonding tailoring adhesion between brittle materials. Mater Sci Eng R25 92-98... 

This micro device consists of a round or square micro chamber machined in a bottom plate sealed by a cover slip with double-sided adhesive tape [23], Sound irradiation was achieved by a PZT disk below. The PZT disk was bonded by super glue to the surface of the micro chamber. The PZT disk was driven by an HP functional generator... 

Divakar, R., Butler, D., Papautsky, I., Room temperature low-cost UV-cured adhesive bonding for microfluidic biochips. Micro Total Analysis Systems, Proceedings 5th TTAS Symposium, Monterey, CA, Oct. 21-25, 2001. Kluwer Academic Publishers, Dordrecht, the Netherlands, 2001, 385-386. 

These surface modifications were performed in "pure" micro-wave (2.45 GHz, "single-mode") or in combined microwave/ radio frequency (2.45 GHz/13.56 MHz, "dual-frequency") plasma. Important systematic changes of the surface composition, wettability, and adhesion of thin metal films were observed for different substrate bias values, and for the different gases. The modified surface-chemical structure is correlated with contact angle hysteresis of water drops this helps to identify which surface characteristics are connected with the wettability heterogeneity and with adhesive bonding properties, and how they are influenced by plasma-surface interactions. 

Flow of the adhesive to fill the surface micro-roughness is important for all bonding, but adhesive penetration into the substrate is not a significant issue in most bonding applications. 

This company s new 2600-093 Micro-Kiss series mix-dispense valves are designed for the low-flow mixing and dispensing of two-component adhesives and sealants such as silicones, epoxies, urethanes, and acrylics. The valves can be used to apply two-part adhesives and sealants for bonding, gasketing, potting and filling processes in aerospace, appliance, contractor, defense, electronics, filters, marine. 

S. Inoue, B. Van Meerbeek, Y. Abe, Y. Yoshida, R Lambrechts, G. Vanherle, H. Sano, Effect of remaining dentin thickness and the use of conditioner on micro-tensile bond strength of a glass-ionomer adhesive. Dent. Mater. 17 (2001) 445 55. 

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