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

A technology of dioxaborane and cross-linked structure is applied in the field of dioxaborane group modification of barium titanate and its preparation, which can solve the problem of the disappearance of functions such as self-healing of Vitrimer materials and the combination of barium pertitanate and polymers. The problem is that the ability is not strong enough, the cross-linked structure of the polymer is destroyed, etc., to achieve the effect of a clear reaction principle, a novel synthesis route, and a simple implementation of the synthesis process.

Active Publication Date: 2022-06-07
NANCHANG INST OF TECH
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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

Method used

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

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Embodiment 1

[0035] Barium titanate (≥98%), silane coupling agent (KH550, ≥99.5%; KH560, ≥98%), ethanol (≥99.7), 4-carboxyphenylboronic acid (≥98%), Propylene glycol (≥99%), anhydrous magnesium sulfate (≥98%), tetrahydrofuran (≥99.9%), thionyl chloride (1mol / L), N,N-dimethylformamide (≥98%) and benzene Boric acid (≥98%) was purchased from Saen Chemical Technology (Shanghai) Co., Ltd.

[0036] like figure 1 As shown in this example, the dioxaborane group-modified barium titanate with a reversible cross-linking structure was prepared by a three-step method. Firstly, according to the coupling reaction principle of silane coupling agent to inorganic particles containing hydroxyl groups on the surface, two kinds of silane coupling agents, KH550 and KH560, were used to modify barium titanate particles, and two kinds of coupling agents modified barium titanate (KH550- barium titanate and KH560 - barium titanate). Secondly, the dioxaborane group is grafted onto the silane coupling agent molecul...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/06C08K3/24C08K9/04
CPCC08K9/06C08K3/24C08K9/04Y02E60/13
Inventor 戴欣王振希张尚玺江新德彭勇柳阳徐胜曹锰
Owner NANCHANG INST OF TECH
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