Quartz Microcrystal-Hybridized Organosilicone Encapsulant with Enhanced Optical and Thermal Performances

Abstract

Encapsulant is one determining factor underpinning the device lifetimes of organic optoelectronics. However, encapsulant seriously needs improvement in optical, thermal, and mechanical properties, especially to develop organic light emitting diodes. In this study, we prepared an in situ crosslinked organosilane composite containing benzyloxy and glycidyl-modified quartz microcrystal (mQMC) as high performance encapsulant. In the present work, methylphenylsilanediol (MPSD) was introduced as a novel crosslinker to impart appropriate structural strength. Along with increasing mQMC fillers, this organosilane system shows improved properties, such as refractive index, thermal stability, and storage modulus. Specifically, these hybridized mQMCs in the organosilane framework may facilitate an approximate two-fold increase (0.238 W/(m·K)) in overall thermal conductivity at the determined concentration.

Comparison with Experiment, Model, and Simulation for Thermal Conductive Mechanism of Polymer Composites without Particle Network

“…Finally, the SiO 2based polymer composites with 3D crosslinked organosilicone www.advancedsciencenews.com www.mcp-journal.de network were synthesized by hydrosilylation of VMPS and MPS using Pt Karstedt's catalyst, which was certificated in our previous work. [24] In this matrix, multiple polymerizations, including ring-opening polymerization of glycidyl groups, thermopolymerization of vinyl groups, and hydrosilylation between vinyl groups and active hydrogens in polysiloxane chain, greatly improved the crosslinking density, curing properties, and mechanical strength of the resulting organosilicone elastomer. It distinctly provided a promising technology for high performance encapsulant.…”

Intrinsic High Refractive Index Siloxane–Sulfide Polymer Networks Having High Thermostability and Transmittance via Thiol–Ene Cross-Linking Reaction

“…Among these intrinsic HRIPs, silicon-containing HRIPs have attracted great research attention due to their exceptional stability and good adhesion to glass or organic polymer substrates. ,,− According to the reported research, most silicon-containing HRIPs were polysiloxanes prepared by the sol–gel process with RIs about 1.6. ,,,,− Usually, polysiloxane films prepared from sol–gel solution are porous and rough, and those porous centers can trap air, leading to a decrease in RI . Therefore, developing some other preparation methods for network formation is important for polysiloxane films.…”