Adhesives and Adhesive Joints in Industry Applications

The choice of materials used in the chip fabrication is crucial in microfluidics. They are selected and adapted depending on the available production techniques and associated processes, the involved characterization and measurement methods, the physical and chemical experimental conditions, and the cost. Here, we propose a versatile approach using a combination of epoxy materials to fabricate manually resealable and reusable (>40 times) microfluidic chips which demonstrate numerous potentialities: good chemical resistance, optical (visible and X-ray) transparency, biocompatibility, capability to undergo in average 2.9 bar of liquid pressure, or integration of high aspect ratio (>1500) channels. It thus represents a promising alternative for prototyping in a large panel of applications and fundamental studies.

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How Water Content Can Influence the Chemomechanical Properties and Physical Degradation under Aging of Experimental Adhesives

Esteves

Barcellos

Silva

et al. 2022

International Journal of Dentistry

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Objective. To evaluate the physicochemical (sorption (SOR), solubility (SOL), and degree of conversion (DC)) and mechanical (flexural strength (FS), modulus of elasticity (ME), and compressive strength (CS)) properties of adhesives with different water contents (D2O). Materials and Methods. An adhesive was formulated: 55 wt% BisGMA, 45 wt% HEMA, 0.5 wt% camphorquinone, 0.5 wt% EDMAB, and 1.0 wt% DPIHP. D2O was added into the adhesives (0 wt%, 10 wt%, and 16 wt%). DC was monitored through the FTIR. FS, ME, CS, SOR, and SOL were tested. The adhesive samples were aged in deionized water, ethanol, and acetone. Data were submitted to ANOVA and Tukey’s tests (5%). Results. For DC, the 0 wt% group showed a significant reduction (68.09 ± 0.14A) compared with the 10 wt% (87.07 ± 0.81B) and 16 wt% groups (89.87 ± 0.24B); 10 wt% showed the highest FS (MPa) mean values (141.6 ± 6.71B) compared with the 0 wt% (109.4 ± 20.5A) and 16 wt% (107.8 ± 15.8A). For the CS (MPa) and ME (GPa), the 16 wt% showed the lowest mean values (98.8 ± 18.0B and 2.2 ± 0.3B, respectively) compared with the 10 wt% and 0 wt%. For the SOR, 16 wt% of water showed the highest mean values and the ethanol showed the lowest mean values of SOL regardless of water content. Conclusion. The amount of water content and the types of aging solvents significantly affect the adhesive properties.

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Adhesives and Adhesive Joints in Industry Applications

Cited by 8 publications

References 2 publications

Influence of fillers on epoxy resins properties: a review

Influence of fillers on epoxy resins properties: a review

“All in One” Epoxy-Based Microfluidic Chips at Your Fingertips

How Water Content Can Influence the Chemomechanical Properties and Physical Degradation under Aging of Experimental Adhesives

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