Polycondensation catalyst for polyester synthesis as well as preparation method and application of polycondensation catalyst

The technology of a polycondensation catalyst and a synthesis method, applied in the field of materials, can solve the problems of insufficient heat and humidity resistance to meet demand, antimony heavy metal pollution, unfavorable recycling of waste polyester, etc., and achieve the effects of imparting antistatic properties, increasing crystallization rate, and shortening polycondensation time.

Active Publication Date: 2021-10-26
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Similarly, for applications that require certain antistatic performance, such as capacitor packaging materials, only resistance to humidity and heat cannot meet the demand
[0006] In addition, some R&D personnel in the industry currently use antimony-based catalysts, but the antimony remaining in polyester products will cause heavy metal pollution, which limits its application in the food field and is not conducive to the recycling of waste polyester

Method used

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  • Polycondensation catalyst for polyester synthesis as well as preparation method and application of polycondensation catalyst
  • Polycondensation catalyst for polyester synthesis as well as preparation method and application of polycondensation catalyst
  • Polycondensation catalyst for polyester synthesis as well as preparation method and application of polycondensation catalyst

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preparation example Construction

[0045] Specifically, as an aspect of the technical solution of the present invention, what it relates to is a kind of preparation method for the polycondensation catalyst of polyester synthesis, and it comprises:

[0046] Provide Ti 3 C 2 T x Mxene material;

[0047] the Ti 3 C 2 T x Mxene materials are homogeneously blended with benzoxazine monomers to obtain blends,

[0048] The blend is heated for curing to obtain Ti 3 C 2 T x MXene / benzoxazine resin composites;

[0049] laser on the Ti 3 C 2 T x MXene / benzoxazine resin composites were irradiated to prepare titanium-supported laser-induced graphene composites, which are polycondensation catalysts for polyester synthesis.

[0050] In some embodiments, the preparation method comprises: adopting strong acid to Ti x al y C z MAX phase material is chemically etched to produce Ti 3 C 2 T x Mxene material.

[0051] In some embodiments, the preparation method comprises: the Ti 3 C 2 T x Mxene materials...

Embodiment 1

[0095] (1) Put Ti 3 AlC 2 The MAX phase powder was added to the 10% HF solution at a mass ratio of 1:10, stirred for 24 hours, the bottom sediment was collected by centrifugation, and dried in vacuum to obtain Ti 3 C 2 T x Mxene powder. Ti 3 C 2 T x Mxene and benzoxazine monomers (the monomer structure is shown in the figure below) were weighed at a mass ratio of 2:25, blended, heated to 120°C to make the two evenly mixed, and then heated to 150°C, and at this temperature Cured for 6 hours to obtain Ti 3 C 2 T x MXene / poly(PBz) composites;

[0096]

[0097] (2) Use a CW laser with a wavelength of 10.6 microns to Ti 3 C 2 T x The MXene / poly(PBz) composite was irradiated with laser, and the size of the laser irradiated area was set to 20mm×10mm. Under the photothermal action of the laser, Ti 3 C 2 T x The MXene / poly(PBz) composite was directly converted into a titanium-supported LIG polycondensation catalyst with a laser power of 3 W and a laser speed of...

Embodiment 2

[0101] (1) Put Ti 3 AlC 2 The MAX phase powder was added to the 10% HF solution at a mass ratio of 1:10, stirred for 24 hours, the bottom sediment was collected by centrifugation, and dried in vacuum to obtain Ti 3 C 2 T x Mxene powder. Ti 3 C 2 T x Mxene and benzoxazine monomers (monomer structure shown in the figure below) were weighed at a mass ratio of 4:25, blended, heated to 120°C to make the two evenly mixed, and then heated to 150°C, and at this temperature Cured for 6 hours to obtain Ti 3 C 2 T x MXene / poly(PBz) composites;

[0102]

[0103] (2) Using CO with a wavelength of 10.6 microns 2 Laser on Ti 3 C 2 T x MXene / poly(PBz) composites were irradiated with laser, and Ti 3 C 2 T xThe MXene / poly(PBz) composite was directly transformed into a titanium-supported LIG polycondensation catalyst with a laser power of 50 W and a laser speed of 1.27 m / s.

[0104] (3) Add dimethyl furandicarboxylate, glycerol and anhydrous zinc acetate into the reacti...

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Abstract

The invention discloses a polycondensation catalyst for polyester synthesis and a preparation method and application thereof. The preparation method comprises the following steps: carrying out homogeneous blending on a Ti<3>C<2>T<x>MXene material and a benzoxazine monomer to obtain a blend, then carrying out heating for curing treatment to obtain a Ti<3>C<2>T<x>MXene/benzoxazine resin composite material, and finally, irradiating the Ti<3>C<2>T<x>MXene/benzoxazine resin composite material with laser to prepare the polycondensation catalyst for polyester synthesis. The prepared polycondensation catalyst for polyester synthesis has high catalytic activity, and polyester with higher molecular weight can be obtained through polycondensation polymerization within shorter time, so the tensile modulus, tensile strength and other mechanical properties of polyester are improved. In addition, side reactions such as raw material diacid decarboxylation and thermal degradation of polyester can be inhibited by shorter polymerization time, so the obtained polyester has better hue. Moreover, LIG in the polyester can increase the crystallization rate of the polyester and enhance the conductivity of the polyester, so a polyester product is endowed with antistatic performance.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a titanium-supported LIG (laser-induced graphene) composite polycondensation catalyst for polyester synthesis, a preparation method thereof, and an application in polyester synthesis. Background technique [0002] Polyester is an important engineering plastic and fiber raw material, with friction resistance, good dimensional stability, solvent resistance and excellent thermomechanical properties. Catalysts have a great influence in polyester production, so research on catalysts has always been a hot spot in the polyester industry. Antimony-based catalysts, which are widely used at present, will cause heavy metal pollution and have adverse effects on human health, and are destined to be gradually eliminated by the market. Titanium-based catalysts are moderately priced, have high activity and good safety, and are strong competitors of antimony-based catalysts. However, there ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/85C08G63/87C08G63/183C08G63/668C08G63/127C08G63/676
CPCC08G63/85C08G63/87C08G63/183C08G63/127C08G63/668C08G63/676
Inventor 刘小青费璇刘敬楷江艳华
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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