CN-122011644-A - PMMA composite material with integrated structure and function, and preparation method and application thereof

CN122011644ACN 122011644 ACN122011644 ACN 122011644ACN-122011644-A

Abstract

The invention provides a PMMA composite material with integrated structure and function, a preparation method and application thereof, and belongs to the technical field of thermoplastic composite materials. The preparation method comprises the steps of mixing acrylic ester core-shell copolymer and methyl methacrylate according to the mass ratio of (1-20) to 100 to obtain a resin solution, adding functional filler and initiator accounting for 0.1-20% of the mass ratio of the resin solution into the resin solution respectively, mixing to obtain a stable resin solution, and initiating in-situ bulk polymerization reaction after the reinforced fiber material and the stable resin solution are compounded to prepare the PMMA composite material with integrated structure and function. After the resin liquid added with the functional filler is compounded with the reinforcing material to form the composite material, the PMMA composite material is subjected to in-situ bulk polymerization reaction, and the obtained composite material has excellent mechanical properties and functionality, and finally the structural-functional integrated PMMA thermoplastic composite material is formed.

Inventors

LIN ZHITAO
MA JINPING
ZHAO SHENGYAO
LIU YULAN
GAO ZHONGXING
GUO ZIFENG
ZHU BO

Assignees

山东省惠鲁碳材料科技有限公司
山东理工大学
山东宽原新材料科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260209

Claims (10)

1. The preparation method of the PMMA composite material with integrated structure and function is characterized by comprising the following steps of: S1, mixing an acrylic ester core-shell copolymer with a weight average molecular weight of 500000-2500000 g/mol and methyl methacrylate according to a mass ratio of (1-20): 100 to obtain a resin solution; S2, respectively adding a functional filler and an initiator accounting for 0.1-10% of the resin solution into the resin solution, and mixing to obtain a stable resin solution; S3, after the reinforced fiber material is compounded with the stable resin liquid, initiating an in-situ bulk polymerization reaction to prepare the structural-functional integrated PMMA composite material.
2. The preparation method of the structural-functional-integrated PMMA composite material according to claim 1, wherein in S1, the weight average molecular weight of the acrylic ester core-shell copolymer is 500000-2500000 g/mol.
3. The method for preparing the PMMA composite material with integrated structural and functional functions according to claim 1, wherein in S1, the viscosity of the resin solution is 50-1000 mPa.s at 25 ℃.
4. The method for preparing a structural-functional integrated PMMA composite material according to claim 1, wherein in S2, the functional filler comprises one or more of photochromic filler, thermochromic filler, electromagnetic wave-proof, ray-proof filler and conductive filler; or the functional filler is subjected to surface treatment, wherein the surface treatment method comprises coupling agent modification, polymer coating modification or surfactant modification; or the initiator is a free radical initiator, and comprises one or more of azo initiators, organic peroxide initiators and redox system initiators.
5. The method for preparing a structurally functional integrated PMMA composite of claim 1, wherein the type of the reinforcing fiber material comprises one or more of glass fiber, carbon fiber, basalt fiber and plant fiber.
6. The method for preparing a structurally functional integrated PMMA composite of claim 1, wherein in S3 the reinforcing fiber material is a chopped fiber or a continuous fiber cloth; Or the continuous fiber cloth is one or more of unidirectional continuous fiber fabric, two-dimensional laminated structure fabric or three-dimensional woven structure fabric, wherein a single layer in the two-dimensional laminated structure fabric is one of plain weave, twill weave or satin weave, and the three-dimensional woven structure fabric is one of three-dimensional four-way, three-dimensional five-way, three-dimensional six-way and three-dimensional seven-way.
7. The method for preparing a PMMA composite material with integrated structural and functional functions according to claim 1, wherein in S3, the method for compounding comprises one of casting molding, vacuum infusion molding, hand lay-up molding, winding molding or pultrusion molding.
8. The method for preparing a structurally functional integrated PMMA composite according to claim 1, wherein in S3, the initiation method of the in situ bulk polymerization reaction comprises thermal initiation.
9. A structurally functional integrated PMMA composite prepared by the method for preparing a structurally functional integrated PMMA composite according to any one of claims 1 to 8.
10. Use of a structurally functionally integrated PMMA composite according to claim 9.

Description

PMMA composite material with integrated structure and function, and preparation method and application thereof Technical Field The invention belongs to the technical field of thermoplastic composite materials, and particularly relates to a structural-functional integrated PMMA composite material, and a preparation method and application thereof. Background The disclosure of this background section is only intended to increase the understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art already known to those of ordinary skill in the art. The structure and function integrated composite material is one kind of material or material formed structure with one or several specific physical, chemical or biological functions while bearing mechanical load. For example, in the wind power field, the main bearing structural member of the wind turbine generator system is required to have lightning protection, electric conduction, weather resistance and other performances while bearing mechanical load. At present, thermosetting composite materials are mainly adopted in the fields with extremely high requirements on structural function integration such as wind power, traffic and the like, and have excellent comprehensive performance, but are difficult to recycle and reprocess and bring pressure to the environment. Thermoplastic composite materials, particularly composite materials based on polymethyl methacrylate (PMMA), have excellent weather resistance, processability and environmental protection characteristics that can be recycled. However, its inherent brittleness and functional singleness limit its application in high-end structural members that are required to have both load-bearing capacity and special functions (such as heat conduction, electric conduction, intelligent color change, etc.). The added filler or other components are added to endow the PMMA resin with functionality or improve the toughness of the PMMA resin, however, in the traditional melt blending method, the high melt viscosity of the PMMA resin prevents other components from being uniformly dispersed in the PMMA, and defects are easily formed in the PMMA resin due to agglomeration, so that the mechanical property is reduced and the functionality is unstable. In addition, when the PMMA resin needs to be compounded with fiber reinforcements (such as carbon fibers and glass fibers) to prepare a high-strength structural member, the high melt viscosity of the PMMA resin also seriously hinders the sufficient infiltration of fiber bundles, and the poor interface bonding of the composite material is easily caused, so that the composite material becomes a final failure source. In order to solve the problems of filler dispersion and poor thermoplastic resin wettability, the prior art usually adopts an in-situ bulk polymerization method, so that MMA monomer is partially polymerized to form a prepolymer with certain viscosity, and then the filler or fiber is added for compounding, so that the dispersion stability of the filler is improved, and the necessary viscosity requirement of the resin during compounding with the fiber is met. The method has the defects of difficult process control, poor repeatability, narrow operation window, low production efficiency, affected final material performance and the like, and is a technical problem which needs to be solved by the technicians in the field. Disclosure of Invention The invention aims to solve the defects of the prior art, and provides a structural-function integrated PMMA composite material, a preparation method and application thereof, and aims to overcome the defects of difficult process control, poor repeatability and the like in the preparation of a filled or fiber reinforced thermoplastic resin composite material by the existing in-situ prepolymerization method, and the method abandons the traditional path for partially polymerizing an MMA monomer and adopts a technical route for directly dissolving a pre-synthesized copolymer in the MMA monomer. In order to achieve the above purpose, the technical scheme of the invention is as follows: in a first aspect of the present invention, a method for preparing a PMMA composite material with integrated structural function is provided, comprising the steps of: S1, mixing an acrylic ester core-shell copolymer with a weight average molecular weight of 500000-2500000 g/mol and methyl methacrylate according to a mass ratio of (1-20): 100 to obtain a resin solution; S2, respectively adding a functional filler and an initiator accounting for 0.1-10% of the resin solution into the resin solution, and mixing to obtain a stable resin solution; S3, after the reinforced fiber material is compounded with the stable resin liquid, initiating an in-situ bulk polymerization reaction to prepare the structural-functional integrated PMMA composite material. In t