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CN-122011575-A - MXene/polypropylene composite material and preparation method and application thereof

CN122011575ACN 122011575 ACN122011575 ACN 122011575ACN-122011575-A

Abstract

An MXene/polypropylene composite material, a preparation method and application thereof relate to the technical field of high polymer materials; the MXene/polypropylene composite material comprises 100 parts of polypropylene, 4-10 parts of MXene, 0.1-3 parts of SiO 2 nano-particles and 2-10 parts of piperazine modified ammonium polyphosphate; the MXene/polypropylene composite material is compounded by adopting a specific amount of Mxene and piperazine modified ammonium polyphosphate, and when the MXene/polypropylene composite material is subjected to processing shearing force or interfacial tension, the piperazine modified ammonium polyphosphate anchored MXene nano-sheets are more easily and orderly arranged along the force field direction, so that the barrier property to gas molecules is greatly enhanced, and the oxygen permeation rate is obviously reduced. SiO 2 nano particles can be filled in gaps of the MXene sheet layers, so that the barrier permeation path is prolonged, and meanwhile, the rigidity and the stability of the material are enhanced, and therefore, the oxygen permeation rate is obviously reduced and the mechanical property is improved under the synergistic effect of the components.

Inventors

  • CHEN YAO
  • FU WEI
  • REN SIHUA
  • ZHU XIANGYU
  • LIU LEWEN
  • LI WENZHAO
  • XIONG ZHI

Assignees

  • 武汉金发科技有限公司
  • 武汉金发科技企业技术中心有限公司

Dates

Publication Date
20260512
Application Date
20260130

Claims (10)

  1. 1. The MXene/polypropylene composite material is characterized by comprising, by mass, 100 parts of polypropylene, 4-10 parts of MXene, 0.1-3 parts of SiO 2 nano-particles and 2-10 parts of piperazine modified ammonium polyphosphate.
  2. 2. The MXene/polypropylene composite material according to claim 1, comprising the following components, by mass, 5-8 parts of MXene and 3-6 parts of piperazine modified ammonium polyphosphate.
  3. 3. The MXene/polypropylene composite material according to claim 1, characterized in that the SiO 2 nano-particles have a D50 particle size of 1-40nm, preferably a D50 particle size of 5-20nm.
  4. 4. The MXene/polypropylene composite of claim 1, wherein the polypropylene is homo-or co-polypropylene.
  5. 5. The MXene/polypropylene composite according to claim 1 or 4, wherein the polypropylene has a melt mass flow rate of 5-40g/10min at 230 ℃ and 2.16 Kg.
  6. 6. The MXene/polypropylene composite material according to claim 1, wherein the MXene has a structural formula M n+ 1 X n T x , wherein M is at least one of Ti, zr and Cr, X is at least one of F, cl, O and-OH, N is 1-3, X is 1-15, preferably the MXene has a structural formula Ti 3 C 2 T x , T is at least one of F, cl, O and-OH, and X is 1-15.
  7. 7. The MXene/polypropylene composite material according to any one of claims 1 to 6, wherein the modification method of piperazine modified ammonium polyphosphate comprises the following steps of uniformly mixing and dispersing piperazine, ammonium polyphosphate and an alcohol solvent, and reacting at 80-100 ℃ to obtain the piperazine modified ammonium polyphosphate.
  8. 8. The MXene/polypropylene composite material according to claim 1, wherein the mass ratio of piperazine to ammonium polyphosphate in the piperazine modified ammonium polyphosphate is (0.2-0.6): 1.
  9. 9. A method for preparing the MXene/polypropylene composite material according to any one of claims 1 to 8, which is characterized by comprising the following steps of uniformly mixing the components, banburying, melt blending and compression molding.
  10. 10. Use of an MXene/polypropylene composite material according to any one of claims 1-8 for flame retardant plastics.

Description

MXene/polypropylene composite material and preparation method and application thereof Technical Field The application relates to the field of high polymer materials, in particular to an MXene/polypropylene composite material, and a preparation method and application thereof. Background Polypropylene (PP) is one of five general-purpose plastics, and is widely used because of its simple processing method, wide sources, high chemical resistance, excellent heat resistance, excellent acid and alkali resistance, and the like. But the PP has higher oxygen and water vapor transmittance and poor flame retardant property, and limits the application of the PP in the fields of electronic and electrical appliance packaging and the like. MXene is receiving great attention as an emerging 2D nanomaterial because of its good electrical conductivity, thermal conductivity, mechanical properties, and abundant surface groups. The MXene has a layered structure, and the MXene contains transition metal oxide, so that the MXene can play a role in catalyzing, reducing and burning some NOx toxic gases, thereby reducing smoke release, and has great application potential in the field of low-smoke halogen-free flame retardance. However, PP is a nonpolar material, its surface energy is low, and MXene is liable to generate serious re-stacking and overlapping problems during the processing of the system, so that a large amount of MXene needs to be added to meet the requirement of flame retardant property, resulting in a great reduction of mechanical properties. In order to enhance the flame retardant property and mechanical property of the MXene/polypropylene composite material, the patent CN116656046A provides a flame retardant anti-ultraviolet modified lignin hybridized MXene/polypropylene composite material and a preparation method thereof, wherein phosphorus-nitrogen modified lignin hybridized MXene is adopted to obtain an MX@LNP flame retardant, and then the MX@LNP flame retardant is compounded with ammonium polyphosphate APP to obtain a flame retardant MA, and the flame retardant MA is fused and compounded with polypropylene to obtain the composite material with good flame retardant, anti-ultraviolet and mechanical properties. However, the technology of the method needs to carry out MXene modification treatment, is complex, is difficult to ensure the stability of an MXene modified structure, is not suitable for large-scale production and manufacture, and can not improve the gas barrier property of the MXene/polypropylene composite material. Disclosure of Invention The invention aims to overcome the defects and the shortcomings of the prior art and provide an MXene/polypropylene composite material which has good mechanical property and gas barrier property when guaranteeing the flame retardant grade. Another object of the invention is to provide a method for preparing an MXene/polypropylene composite material. Another object of the invention is to provide the use of an MXene/polypropylene composite in flame retardant plastics. The above object of the present invention is achieved by the following technical scheme: The invention provides an MXene/polypropylene composite material, which comprises, by mass, 100 parts of polypropylene, 4-10 parts of MXene, 0.1-3 parts of SiO 2 nano-particles and 2-10 parts of piperazine modified ammonium polyphosphate (PAPP). According to the MXene/polypropylene composite material, a specific amount of Mxene and piperazine modified ammonium polyphosphate are adopted to be compounded, when the piperazine modified ammonium polyphosphate is subjected to processing shearing force or interfacial tension, the piperazine modified ammonium polyphosphate anchored MXene nano-sheets are more easily orderly arranged along the force field direction, so that the barrier property to gas molecules can be greatly enhanced, siO 2 nano-particles can be filled in gaps of MXene sheets, the barrier permeation path is prolonged, and meanwhile, the rigidity and the stability of the material are enhanced, so that the oxygen permeation rate is obviously reduced and the mechanical property is improved under the synergistic effect of all components. In addition, the layered structure of Mxene has a smoke blocking effect, and the transition metal oxide can play a role in catalyzing, reducing and burning some NOx toxic gases, so that the release of smoke is reduced, and in the burning process, the MXene has acid sites thereon which can catalyze the acid sites and also can catalyze the crosslinking and carbonization of molecular chain segments. Meanwhile, the piperazine modified ammonium polyphosphate has the intrinsic characteristics of an acid source and an air source, promotes a matrix to form a carbon layer structure in the combustion process, can be cooperated with an MXene sheet layer to construct a denser, continuous and high-strength barrier network structure, and improves the flame-retardant and smoke-suppressing effects. In s