Thionyl Chloride Corrodes Hexagonal Boron Nitride to Generate Reactive Functional Groups

Abstract

Two-dimensional hexagonal boron nitride (h-BN) has received much attention owing to its unique properties and wide range of applications. However, the lack of sufficient active functional groups on the surface coupled with the extremely stable structure restricts the wide application of h-BN. We find that thionyl chloride can corrode commercially available h-BN and generate many through-holes in the thickness direction. Both X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FT-IR) show that the corroded h-BN contains reactive hydroxyl and a lot of amino groups. The corrosion mechanism is proposed and we conclude that H+ and OH– will affect the defect structure of the corroded h-BN by affecting the generation of boric acid. The thionyl chloride corroded h-BN could improve the thermal conductivity and DC breakdown strength of the composites because of the improved interface. This novel method about corroding h-BN through thionyl chloride is promising for the modification research of h-BN due to its simplicity and efficiency.

Preparation and properties of branch‐leaf‐like polyimide composite films with high thermal conductivity and low dielectric loss

“…Further, the compositions of materials are determined in virtue of the flourier transformed infrared (Figure 3b). BN material has an obvious in‐plane BN stretching vibration peak and out‐of‐plane bending vibration peak at 1000–1500 cm −1 , the characteristic peak of the amino group at about 3400 cm −1 , and possibly the hydroxyl group characteristic peak of water in the air 61,62 . The absorption peak of CN material at 808 cm −1 is the characteristic peak of triazine ring respiratory vibration, the absorption peak at 1200–1700 cm −1 is the CN heterocyclic peak, and the absorption peak at 3000–3600 cm −1 is the characteristic peak of NH bond stretching vibration.…”

“…According to a previous study, 63 equal amounts of melamine and modified BN 61 were placed in a 250 mL beaker, followed by some ethanol added and stirred at room temperature for 2 h. After the evaporation of the solvent by a rotary evaporator, a white powder was obtained. The powder was milled and then calcined in a tube furnace at 550°C for 4 h to obtain a yellow‐green powder.…”

“…BN material has an obvious in-plane B N stretching vibration peak and out-of-plane bending vibration peak at 1000-1500 cm À1 , the characteristic peak of the amino group at about 3400 cm À1 , and possibly the hydroxyl group characteristic peak of water in the air. 61,62 The absorption peak of CN material at 808 cm À1 is the characteristic peak of triazine ring respiratory vibration, the absorption peak at 1200-1700 cm À1 is the CN heterocyclic peak, and the absorption peak at 3000-3600 cm À1 is the characteristic peak of N H bond stretching vibration. The insertion of CN into BN material may result in the distortion of layer symmetry, resulting in a slight shift in the characteristic peaks in the infrared spectral map of the final synthesized material, and the appearance of diffraction peaks is similar to BN and CN, which is attributed to the covalent interaction between the materials, confirming the successful synthesis of the sintered material.…”

Effects of modified hexagonal boron nitride on electrical insulation properties of LLDPE/EAA nanocomposites

“…T‐BN was prepared in the laboratory 22 . Firstly, chloroform and thionyl chloride were mixed at a ratio of 1:1 (v/v) to form a mixed solution (100 mL).…”

“…T-BN was prepared in the laboratory. 22 Firstly, chloroform and thionyl chloride were mixed at a ratio of 1:1 (v/v) to form a mixed solution (100 mL). Then under the action of ultrasound and stirring, h-BN (10.0 g) was added into the mixed solution to form a uniform suspension, followed by half-sealed stirring for 72 h at room temperature.…”