Enhanced thermal and mechanical properties of 3D-printed PEG containing acrylate composite with surface-treated BN via digital light processing
Youngsung Cho, Jooheon Kim
Abstract
The interest in additive manufacturing technology of 3D printed composite is increasing owing to its potential applications with a wide variety of shapes and properties. Through digital light processing (DLP), the polymer-based thermally conductive composites with phase change material for heat management were fabricated. Diethylene glycol diacrylate (DEGDA), polyethylene glycol (PEG), and phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide (BAPO) were selected as a monomer, oligomer, and photo-initiator for UV curable resins. Boron nitride was hydroxylated and grafted with PEG to improve the interfacial interaction between the filler and the matrix. Optimization of DLP parameters such as light intensity, exposure time, and operating temperature was performed to enhance the quality of the 3D-printed composite. The resulting composite exhibited a thermal conductivity of 0.916 W/(m·K) and mechanical strength of 7.36 MPa, which are 216% and 167% higher than those of the respective matrices. Moreover, the composite has a latent heat of 200.22 J/g. The advantages of the 3D-printed polymer-based phase change material composite for advanced electronic packaging were explored. This study opens a new era in the fabrication of organic PCMs with enhanced thermal conductivity via digital light processing.