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Dioxaborinane group modified barium titanate with reversible cross-linked structure and preparation method of dioxaborinane group modified barium titanate

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-linking structure of the polymer is destroyed, etc., to achieve the effect of clear reaction principle, novel synthesis route, and simple implementation of synthesis process.

Active Publication Date: 2021-09-28
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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  • Dioxaborinane group modified barium titanate with reversible cross-linked structure and preparation method of dioxaborinane group modified barium titanate
  • Dioxaborinane group modified barium titanate with reversible cross-linked structure and preparation method of dioxaborinane group modified barium titanate
  • Dioxaborinane group modified barium titanate with reversible cross-linked structure and preparation method of dioxaborinane group modified barium titanate

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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 Sarn Chemical Technology (Shanghai) Co., Ltd.

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

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Abstract

The invention discloses dioxaborinane group modified barium titanate with a reversible cross-linked structure and a preparation method of the dioxaborinane group modified barium titanate. The method comprises the steps: firstly, reacting 4-carboxyphenylboronic acid and propylene glycol to obtain a dioxaborinane derivative, and then carrying out acylation reaction on the dioxaborinane derivative and KH550 grafted barium titanate to obtain dioxaborinane group-containing barium titanate A; secondly, reacting KH560 grafted barium titanate with phenylboronic acid to obtain barium titanate B containing a dioxaborinane group; and finally, reacting the barium titanate A with the barium titanate B by utilizing a double decomposition reaction principle of the dioxaborinane group to obtain the dioxaborinane group modified barium titanate with the reversible cross-linked structure. The dioxaborinane group modified barium titanate with the reversible cross-linked structure can be used as a high-dielectric filler of a novel Vitrimer material, so that the blank of the functional filler at home and abroad is filled.

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 crosslinking structure and a preparation method thereof. Background technique [0002] Dielectric material is a kind of insulating material with excellent dielectric capacity. Due to the phenomenon of polarization, conduction, loss and breakdown under the action of electric field, dielectric material is the frontier hotspot in the field of contemporary energy storage devices and new energy research. One of (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 ...

Claims

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Application Information

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Patent Type & Authority Applications(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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