A kind of dioxaborane group modified barium titanate with reversible crosslinking structure and preparation method thereof

Abstract

The invention discloses a dioxaborane group-modified barium titanate with a reversible crosslinking structure and a preparation method thereof. In the method, firstly, 4-carboxyphenylboronic acid and propylene glycol are reacted to obtain a dioxaborane derivative. Then the dioxaborane derivatives and KH550 grafted barium titanate were acylated to obtain barium titanate A containing dioxaborane groups; secondly, the KH560 grafted barium titanate was reacted with phenylboronic acid to obtain Barium titanate B containing dioxaborane groups; finally, using the metathesis reaction principle of dioxaborane groups, barium titanate A and barium titanate B were reacted to obtain dioxa Borane group modified barium titanate. The dioxaborane group-modified barium titanate with a reversible crosslinking structure involved in the present invention can be used as a high-dielectric filler for a new type of Vitrimer material, thereby making up for the blank of such functional fillers at home and abroad.

Description

technical field [0001] The invention relates to the technical field of high dielectric resin fillers, in particular to a dioxaborane group modified barium titanate with a reversible cross-linking structure and a preparation method thereof. Background technique [0002] Dielectric material is a kind of insulating material with excellent dielectric ability. Due to the phenomenon of polarization, conductance, loss and breakdown under the action of electric field, dielectric material is a frontier research hotspot in the field of contemporary energy storage devices and new energy. One (QiL, Lei C, Gadinski MR, et al. Flexible high-temperature dielectric materials from polymer nanocomposites[J]. Nature, 2015, 523: 576~579; Kumar S, SupriyaS, Kar M. Enhancement of dielectric constant in polymer -ceramic nanocomposite for flexible electronics and energy storage applications[J]. CompositesScience and Technology, 2018, 157: 48~56). Barium titanate is a high-dielectric inorganic comp...

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Problems solved by technology

[0007] (1) Most of the modification methods of barium titanate are to improve the polarity of the particle surface through organic modification to improve the compatibility with polymers, but such modified barium titanate usually cannot form chemical bonds with polymer molecular chains, The binding ability of barium pertitanate and polymer is not strong enough

[0008] (2) The traditional modified barium titanate for the new Vitrimer material with dioxaborane groups may destroy the cross-linking structure inside the polymer due to the lack of bonding after filling, resulting in the self-healing of the Vitrimer material and other functions disappear

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