초록

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Abstract ▼ AI-Helper

In this study, we prepared silica nanoparticles with methacrylate groups on the silica surface using a two-step modification process. First, silica particles were silanized with (3-trimethoxysilylpropyl)diethylenetriamine(TPDT), and then a Michael addition reaction was performed between the N-H grou...

In this study, we prepared silica nanoparticles with methacrylate groups on the silica surface using a two-step modification process. First, silica particles were silanized with (3-trimethoxysilylpropyl)diethylenetriamine(TPDT), and then a Michael addition reaction was performed between the N-H groups from the TPDT modified silica surface and the acrylate groups of 3-(acryloyloxy)-2-hydroxypropylmethacrylate(AHM). UV-curable urethane acrylate nanocomposites were subsequently prepared by incorporating (0-5 wt%) pristine silica, TPDT modified silica or TPDT/AHM modified silica as fillers. The incorporation of only 3.0 wt% of TPDT/AHM modified silica particles increased Young's modulus to 333.1 MPa which represents a 30.8% improvement over UV-cured urethane acrylates and the best performance of all three fillers.

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