CN111775517A - Light honeycomb sandwich structure integrating structure and biological safety and preparation method thereof - Google Patents

Light honeycomb sandwich structure integrating structure and biological safety and preparation method thereof Download PDF

Info

Publication number
CN111775517A
CN111775517A CN202010495942.7A CN202010495942A CN111775517A CN 111775517 A CN111775517 A CN 111775517A CN 202010495942 A CN202010495942 A CN 202010495942A CN 111775517 A CN111775517 A CN 111775517A
Authority
CN
China
Prior art keywords
honeycomb
layer
resin
structural
sandwich structure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010495942.7A
Other languages
Chinese (zh)
Inventor
孙建波
杨智勇
易凯
杨昆晓
孙宝岗
左小彪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Academy of Launch Vehicle Technology CALT
Aerospace Research Institute of Materials and Processing Technology
Original Assignee
China Academy of Launch Vehicle Technology CALT
Aerospace Research Institute of Materials and Processing Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Academy of Launch Vehicle Technology CALT, Aerospace Research Institute of Materials and Processing Technology filed Critical China Academy of Launch Vehicle Technology CALT
Priority to CN202010495942.7A priority Critical patent/CN111775517A/en
Publication of CN111775517A publication Critical patent/CN111775517A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/02—Layered products comprising a layer of paper or cardboard next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/021—Fibrous or filamentary layer
    • B32B2260/023—Two or more layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/028—Paper layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/04—Impregnation, embedding, or binder material
    • B32B2260/046—Synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/106—Carbon fibres, e.g. graphite fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • B32B2307/7145—Rot proof, resistant to bacteria, mildew, mould, fungi

Abstract

The invention provides a structure and biosafety integrated light honeycomb sandwich structure and a preparation method thereof, wherein the structure comprises two functional layers, two structural layers and a honeycomb layer, wherein the two structural layers are symmetrically arranged at two sides of the honeycomb layer, the 0-degree direction of the structural layers is consistent with the L direction of the honeycomb stretching direction, and the two functional layers are symmetrically arranged at the outer sides of the two structural layers; the functional layer is formed by curing a prepreg compounded by a resin adhesive film containing inorganic antibacterial master batches and a reinforcing material; the structural layer is formed by curing a prepreg compounded by a resin adhesive film and a reinforcing material; the honeycomb layer is a paper honeycomb structure impregnated with phenolic resin added with an antibacterial agent and/or a mildew preventive. The honeycomb sandwich structure has the antibacterial rate of more than or equal to 99 percent on staphylococcus aureus and escherichia coli, the antibacterial rate of more than or equal to 80 percent on candida albicans, the mildew-proof grade of 0 grade and good mechanical property retentivity.

Description

Light honeycomb sandwich structure integrating structure and biological safety and preparation method thereof
Technical Field
The invention belongs to the technical field of composite material manufacturing, and particularly relates to a light honeycomb sandwich structure integrating structure and biological safety and a preparation method thereof.
Background
The honeycomb sandwich structure material is an efficient material with light weight, high specific strength and high specific rigidity, can be used for manufacturing structural members and functional members for heat insulation, noise reduction and the like, and is one of main materials for manufacturing advanced aircrafts in the future. Among various existing honeycombs, metal honeycombs have a large specific gravity, and with the rapid development of composite material science and the increasing urgent weight reduction requirements, structural parts such as aerospace stations and aircrafts are gradually updated from metals to resin-based composite materials. However, if the non-metallic resin-based composite material is in a closed or humid environment for a long time, the propagation problem of mold is easily caused, so the indexes of the non-metallic material under the working condition, such as antibiosis and mildew prevention, need to be controlled.
Strategic tactical weapons have a long storage and transportation period between manufacture and use, and mold propagation and other problems are easy to occur in the process, so that the potential problem of structural performance reduction is brought. The aeroengine acoustic lining component is in a wet environment for a long time due to a weather environment, and although the design of the drainage channel exists, water accumulation inevitably exists in the honeycomb, and the potential performance reduction problem is also caused. The sealed and unsealed compartments of the space station, both inside and outside the compartments, also use a large amount of resin-based composite material. Compared with metal materials, the resin-based composite material in the sealed cabin can become a mould breeding place and the like. In order to control the microorganisms in the sealed cabin, the biological safety indexes of the resin-based composite material in the cabin, such as antibiosis, mildew prevention and the like, need to be controlled. Meanwhile, the main functions of the space station interior decoration system are to provide hard support for the cabin, so that the space station interior decoration system is convenient for the astronaut to support by means of force and simultaneously realizes the overall architecture of the cabin, thereby having strict requirements on the mechanical properties of the used resin matrix composite material.
Based on the above problems, there is a need for a complete material design basis and a preparation technology for performing structural biosafety integrated composite design and preparation on a resin-based composite material member to realize a structure.
Disclosure of Invention
In order to overcome the defects in the prior art, the inventor of the invention carries out intensive research, provides a light honeycomb sandwich structure integrating structure and biological safety and a preparation method thereof, and solves the problem of the biological safety performance of a panel by introducing high-concentration inorganic antibacterial masterbatch RHA-TA adaptive to the process; the liquid inorganic antibacterial agent CAG6000 and the mildew preventive A02 are introduced in the gum dipping process of honeycomb preparation, the biological safety performance of the honeycomb is realized, the panel with higher content is laid on the surface layer, the panel without the antibacterial mildew preventive is used as the middle layer, the biological safety performance can be realized, and the structural performance is ensured, so that the invention is completed.
The technical scheme provided by the invention is as follows:
in a first aspect, the structure and biosafety integrated light honeycomb sandwich structure comprises two functional layers, two structural layers and a honeycomb layer, wherein the two structural layers are symmetrically arranged on two sides of the honeycomb layer, the 0-degree direction of the structural layers is consistent with the L direction of a honeycomb, and the two functional layers are symmetrically arranged on the outer sides of the two structural layers; the functional layer is formed by curing a prepreg compounded by a resin adhesive film containing inorganic antibacterial master batches and a reinforcing material; the structural layer is formed by curing a prepreg compounded by a resin adhesive film and a reinforcing material; the honeycomb layer is a paper honeycomb structure impregnated with phenolic resin added with an antibacterial agent and/or a mildew preventive.
In a second aspect, a method for preparing a structure and biosafety integrated lightweight honeycomb sandwich structure is used for preparing the structure and biosafety integrated lightweight honeycomb sandwich structure of the first aspect, and comprises the following steps:
step 1, preparing a functional layer raw material: selecting inorganic antibacterial master batches as additives, fully mixing the additives with resin, coating the mixture to form a film, and preparing the film and a reinforcing material into uniform dry prepreg;
step 2, preparing raw materials of a structural layer: selecting a resin system and a reinforcing material which are the same as those of the functional layer, and compounding the resin system and the reinforcing material into a dry prepreg, wherein the structural layer does not contain inorganic antibacterial master batches;
step 3, preparing a honeycomb layer raw material: in the gum dipping process of the paper honeycomb preparation, adding an antibacterial agent and/or a mildew preventive into phenolic resin, dipping gum, and preparing semi-cured or cured honeycomb according to the final molding requirement;
step 4, forming: designing the proportion of the functional layer and the structural layer according to the actual working condition requirements, then sequentially paving the functional layer and the structural layer on a panel mould, and curing and molding the autoclave to form an integrated panel;
and then sequentially placing the panel with the functional layer on the outer side, the glue film, the honeycomb layer, the glue film and the panel with the functional layer on the outer side in an assembly mold, and curing and molding the panel by using an autoclave.
According to the structure and biosafety integrated light honeycomb sandwich structure and the preparation method thereof provided by the invention, the following beneficial effects are achieved:
(1) according to the honeycomb sandwich structure, the material-grade biological safety performance of the panel (the functional layer and the structural layer) and the aramid paper honeycomb is realized, the antibacterial rate to staphylococcus aureus and escherichia coli is more than or equal to 99%, the antibacterial rate to candida albicans is more than or equal to 80%, and the mildew-proof grade is 0;
(2) according to the honeycomb sandwich structure, the functional layer with high antibacterial agent content is used as the surface layer, and the structural layer without the antibacterial agent is used as the middle layer, so that the mechanical property of the structure is ensured while the biological safety performance is realized; compared with a system in which inorganic antibacterial master batches are uniformly distributed in a functional layer and a structural layer, the mechanical property retention rate is 10% -20% higher than that of a system with equivalent antibacterial property, and the killing capacity to candida albicans is more than 30% higher than that of a system with the same average content.
Drawings
Fig. 1 shows a schematic structural view of a honeycomb sandwich structure in the present invention;
fig. 2 shows the results of the antibacterial performance of the honeycomb layer, the first column for each item being the antibacterial rate of staphylococcus aureus, the second column for escherichia coli, and the third column for the antibacterial rate of candida albicans;
fig. 3 shows the results of the antibacterial performance of the honeycomb sandwich structure, the first column for each item is the antibacterial rate of staphylococcus aureus, the second column for escherichia coli, and the third column for candida albicans.
Detailed Description
The features and advantages of the present invention will become more apparent and appreciated from the following detailed description of the invention.
According to a first aspect of the present invention, as shown in fig. 1, there is provided a structure and biosafety integrated light honeycomb sandwich structure, the structure comprises two functional layers 1, two structural layers 2 and a honeycomb layer 3, wherein the two structural layers 2 are symmetrically arranged at two sides of the honeycomb layer 3, the 0 ° direction of the structural layers is consistent with the L direction of the honeycomb, and the two functional layers 1 are symmetrically arranged at the outer sides of the two structural layers 2; the functional layer is formed by curing a prepreg compounded by a resin adhesive film containing inorganic antibacterial master batches and a reinforcing material; the structural layer is formed by curing a prepreg compounded by a resin adhesive film and a reinforcing material; the honeycomb layer is a paper honeycomb structure impregnated with phenolic resin added with an antibacterial agent and/or a mildew preventive. Wherein, the honeycomb L direction refers to the honeycomb cell stretching direction.
In the present invention, the honeycomb layer 3 is selected from any one of aramid paper honeycomb or glass fiber reinforced plastic honeycomb. The honeycomb layer 3 can be a plurality of specifications of honeycombs with or without grooves.
Furthermore, antibacterial agents and mildew preventive agents are added into the phenolic resin impregnated in the honeycomb layer 3 forming process, so that the honeycomb structure with biosafety is obtained, wherein the antibacterial agents are liquid inorganic antibacterial agents CAG6000, and the mildew preventive agents are mildew preventive agents A02. Wherein CAG6000 is a pure inorganic nano-silver antibacterial agent, is a nano-silver solution, and has a silver content of more than 6000 ppm; the mildew preventive A02 is a high-efficiency liquid antibacterial mildew preventive, is a nonionic system, adopts an organic-inorganic composite mildew preventive, and has broad-spectrum antibacterial mildew preventive performance. .
The addition amount of the antibacterial agent is 5-45 wt% of the phenolic resin dry glue, and the addition amount of the mildew preventive is 5-10 wt% of the phenolic resin dry glue. To impregnate the honeycomb or to coat the film, a solvent is added to the resin, wherein the resin without solvent is known as a dry glue. The antibacterial agent and the mildew preventive in the addition range have the antibacterial rate of more than or equal to 99 percent on staphylococcus aureus and escherichia coli, the antibacterial rate of more than or equal to 80 percent on candida albicans and the mildew-proof grade of 0.
In the functional layer, the inorganic antibacterial master batch is the inorganic antibacterial master batch RHA-TA which is an inorganic antibacterial mildew preventive with silver and zinc as active components, the content of the active components is more than or equal to 93 percent, the temperature resistance reaches 500 ℃, and the functional layer is suitable for injection molding and other processes. The inventor adopts the antibacterial agent in the form of master batch in the functional layer instead of selecting the liquid antibacterial agent, because the viscosity of the resin needs to be ensured in the glue film making stage of the resin, if the liquid antibacterial agent is used, the viscosity of the system is reduced, and the prepreg preparation process is influenced; the reason for selecting the RHA-TA is that the inorganic antibacterial mildew preventive has good heat resistance, good process adaptability, slow release antibacterial property and long antibacterial property aging. Silver-based antibiotics have a contact reaction with bacterial and fungal cell membranes, and can cause the destruction or dysfunction of inherent components of bacteria, thereby causing the death of the bacteria.
In the functional layer, the addition amount of the inorganic antibacterial master batch is 2 wt% -20 wt% of the dry resin glue. Tests show that when the addition amount is more than 2 wt%, the antibacterial rate to staphylococcus aureus and escherichia coli is more than or equal to 99%, the antibacterial rate to candida albicans is more than or equal to 80%, and the mildew-proof grade is 0 grade; when the amount exceeds 20 wt%, the coating film formed by resin coating is not uniform in quality and cannot be uniformly coated to form a film.
In the functional layer, the reinforcing material can be selected from one or a combination of T300, T700, T800, M40J high-performance carbon fiber, glass fiber, aramid fiber unidirectional tape or two-dimensional fabric.
In the functional layer, the resin may be selected from one or a combination of epoxy resin, bismaleimide resin, cyanate resin, polyimide resin, or phthalonitrile resin system.
In the invention, in the structural layer, the reinforcing material can be selected from one or a combination of T300, T700, T800, M40J high-performance carbon fiber, glass fiber, aramid fiber unidirectional tape or two-dimensional fabric.
In the structural layer, the resin can be selected from one or a combination of epoxy resin, bismaleimide resin, cyanate resin, polyimide resin or phthalonitrile resin system.
In the structural layer, the resin does not contain an antibacterial agent so as to ensure the mechanical property of the structural layer, thereby realizing the mechanical property of the whole structure. In the invention, the functional layer mainly provides a biological safety function of the honeycomb sandwich structure panel, the structural layer mainly provides a mechanical function of the honeycomb sandwich structure panel, the number of the structural layer is far greater than that of the functional layer, and the number of the functional layer is controlled to be below 4 as much as possible. Functional layer and structural layer set up respectively, compare in homogenization functional layer and structural layer, when improving inside and outside antibacterial property, do benefit to the mechanical strength who guarantees honeycomb sandwich structure.
The honeycomb sandwich structure ensures that the antibacterial rate to staphylococcus aureus and escherichia coli is more than or equal to 99 percent, the antibacterial rate to candida albicans is more than or equal to 80 percent, and the mildew-proof grade is 0 grade; the antibacterial rate of the honeycomb layer in the honeycomb sandwich structure to staphylococcus aureus and escherichia coli is more than or equal to 99%, the antibacterial rate to candida albicans is more than or equal to 80%, the mildew-proof grade is 0 grade, the test standards of the panel and the sandwich structure are GJB150.10A-2009 and QB/T2591-2003, and the test standard of the honeycomb is GB/T20944.3.
Compared with a system in which inorganic antibacterial master batches are uniformly distributed in the functional layer and the structural layer, the functional layer and the structural layer of the honeycomb sandwich structure have the advantages that the mechanical property retention rate is 10-20% higher than that of the system with equivalent antibacterial property, and the killing capacity to candida albicans is more than 30% higher than that of the system with the same average content.
According to a second aspect of the present invention, there is provided a method for preparing a light honeycomb sandwich structure integrated with biosafety, which is used for preparing the light honeycomb sandwich structure integrated with biosafety, and comprises the following steps:
step 1, preparing a functional layer raw material: selecting inorganic antibacterial master batches as additives, fully mixing the additives with resin, coating the mixture to form a film, and preparing the film and a reinforcing material into uniform dry prepreg;
step 2, preparing raw materials of a structural layer: selecting a resin system and a reinforcing material which are the same as those of the functional layer, and compounding the resin system and the reinforcing material into a dry prepreg, wherein the structural layer does not contain inorganic antibacterial master batches;
step 3, preparing a honeycomb layer raw material: in the gum dipping process of the paper honeycomb preparation, adding a proper amount of an antibacterial agent and/or a mildew preventive into phenolic resin, dipping, and preparing a semi-cured or cured honeycomb according to the final forming requirement;
step 4, forming: designing the proportion of the functional layer and the structural layer according to the actual working condition requirements, then sequentially paving the functional layer and the structural layer on a panel mould, and curing and molding the functional layer and the structural layer in an autoclave;
and then sequentially placing a panel with a functional layer on the outer side, a glue film, a honeycomb layer (judging whether the honeycomb needs to be shaped or not according to different structures), the glue film and the panel with the functional layer on the outer side in an assembly mold, and curing and molding by using an autoclave.
In the invention, in the step 1, the inorganic antibacterial master batch is the inorganic antibacterial master batch RHA-TA. The addition amount of the inorganic antibacterial master batch is 2 to 20 weight percent of the dry resin adhesive.
The reinforcing material may be selected from one or a combination of T300, T700, T800, M40J high performance carbon fibers, glass fibers, aramid fiber unidirectional tapes or two-dimensional fabrics thereof. The resin may be selected from one or a combination of epoxy, bismaleimide, cyanate ester, polyimide, or phthalonitrile resin systems.
The thickness of the single-layer function layer after the prepreg is cured is controlled within the range of 0.05-0.3 mm.
In the present invention, in step 2, the reinforcing material may be selected from one or a combination of T300, T700, T800, M40J high performance carbon fiber, glass fiber, aramid fiber unidirectional tape or two-dimensional fabric thereof. The resin may be selected from one or a combination of epoxy, bismaleimide, cyanate ester, polyimide, or phthalonitrile resin systems.
The prepreg does not contain an antimicrobial agent.
The thickness of the single-layer structure layer after prepreg curing is controlled within the range of 0.05-0.3 mm.
In the invention, in the step 3, the honeycomb layer is selected from any one of aramid paper honeycomb or glass fiber reinforced plastic honeycomb. The honeycomb layer can be a plurality of specifications of honeycombs which are grooved or not grooved.
Furthermore, the phenolic resin impregnated in the honeycomb layer is added with an antibacterial agent and a mildew preventive to obtain a honeycomb structure with biosafety, wherein the antibacterial agent is a liquid inorganic antibacterial agent CAG6000, and the mildew preventive is a mildew preventive A02. The addition amount of the antibacterial agent is 5-45 wt% of the phenolic resin dry glue, and the addition amount of the mildew preventive is 5-10 wt% of the phenolic resin dry glue.
In the invention, in step 4, the number of prepreg layers in the structural layer is far larger than that in the functional layer, and the number of functional layer layers is controlled to be less than 4.
In step 4, the adhesive film is selected from any one or combination of J-47C adhesive film, J-116A, SJ-2C and the like.
Examples example 1
A structure and biosafety integrated light honeycomb sandwich structure is shown in figure 1 and comprises a functional layer 1, a structural layer 2 and aramid paper honeycombs 3. The reinforcing material of the functional layer/the structural layer is carbon fiber unidirectional tape T700 (Nippon Tokory), the resin is toughened 604 epoxy resin (aerospace materials and process research institute), the inorganic antibacterial master batch RHA-TA (Shanghai Runhe nanometer materials science and technology Co., Ltd.), the aramid paper honeycomb NH-2.75-32-10mm (Suzhou aromatic Lei honeycomb composite Co., Ltd.), the liquid inorganic antibacterial agent CAG6000 (Beijing Chonggao nanometer technology Co., Ltd.), and the mildew preventive agent is mildew preventive A02 (Beijing Chonggao nanometer technology Co., Ltd.); J-47C glue film (petrochemical research institute of academy of sciences of Heilongjiang province).
A method of making a honeycomb sandwich structure comprising the steps of:
selecting inorganic antibacterial masterbatch RHA-TA as an additive, wherein the addition proportion is 7.5 percent of the mass fraction of resin dry glue, fully mixing the additive with 604 epoxy resin, coating the mixture to form a film, and preparing the film and a reinforcing material into uniform dry prepreg; the thickness of the single layer after curing is 0.05 mm;
an additive-free T700/604 prepreg was prepared by the same process, with a 0.05mm monolayer thickness after curing. The functional layer is 2 layers, the structural layer is 8 layers, and the average content of the final panel RHA-TA additive is 1.5 wt% (resin dry glue);
in the gum dipping process of preparing the honeycomb layer, adding a liquid inorganic antibacterial agent CAG6000 and a mildew preventive A02 into the phenolic resin, dipping the phenolic resin in the gum, and drying, wherein the adding amount of A02 is 10 wt% of the dry phenolic resin, and the adding amount of CAG6000 is 20 wt% of the dry phenolic resin;
laying 2 functional layers and 8 structural layers in sequence, and curing and molding the panel by using an autoclave;
and then sequentially placing the formed panel, the J-47C adhesive film, the aramid paper honeycomb, the J-47C adhesive film and the formed panel in an assembly die, paying attention to the asymmetry of the panel, controlling the functional layer to be exposed on the outer surface, and curing and forming by using an autoclave.
Example 2
A structure and biosafety integrated light honeycomb sandwich structure is shown in figure 1 and comprises a functional layer 1, a structural layer 2 and aramid paper honeycombs 3. The antibacterial reinforced cloth/reinforced cloth base material of the functional layer/the structural layer is aramid fiber forged fabric, eight three-flyaway forged patterns F-8H3 (Yixing Tianqi), the resin is toughened 602 epoxy resin (aerospace materials and process research institute), inorganic antibacterial master batch RHA-TA (Shanghai Runhe nanometer materials science and technology Co., Ltd.), aramid paper honeycomb NH-5.5-48-20mm (Suzhou aromatic Lei honeycomb composite Co., Ltd.), liquid inorganic antibacterial agent CAG6000 (Beijing Chonggao nanometer technology Co., Ltd.), and the mildew preventive is mildew preventive A02 (Beijing Chonggao nanometer technology Co., Ltd.); J-47C glue film (petrochemical research institute of academy of sciences of Heilongjiang province).
A method of making a honeycomb sandwich structure comprising the steps of:
selecting inorganic antibacterial masterbatch RHA-TA as an additive, wherein the addition proportion is 6 percent of the mass fraction of resin dry glue, fully mixing the additive with 602 epoxy resin, coating the mixture to form a film, and preparing the film and a reinforcing material into uniform dry prepreg; the thickness of the single layer after curing is 0.12 mm;
F-8H3/602 prepreg containing no RHA-TA additive was prepared by the same procedure with a 0.12mm monolayer thickness after curing. The functional layer and the structural layer are respectively 3 layers, and the average content of the final panel additive is 3 wt% (resin dry glue);
in the gum dipping process of preparing the honeycomb layer, adding a liquid inorganic antibacterial agent CAG6000 and a mildew preventive A02 into the phenolic resin, dipping the phenolic resin in the gum, and drying, wherein the adding amount of A02 is 10 wt% of the dry phenolic resin, and the adding amount of CAG6000 is 30 wt% of the dry phenolic resin;
sequentially laying 3 functional layers and 3 structural layers, and curing and molding the panel by using an autoclave;
and then sequentially placing the formed panel, the J-47C adhesive film, the aramid paper honeycomb, the J-47C adhesive film and the formed panel in an assembly die, paying attention to the asymmetry of the panel, controlling the functional layer to be exposed on the outer surface, and curing and forming by using an autoclave.
Examples of the experiments
Experimental example 1
For the honeycomb layer material of the honeycomb sandwich structure, the evaluation of the antibacterial performance of the textile is carried out according to the following part 3: the material antibacterial performance test is carried out by a method specified in the oscillation method (GB/T20944.3-2008), and the mildew-proof performance is carried out according to GJB150.10A-2009 standard. The honeycomb layer was prepared in the manner of example 1, and in the preparation process of the honeycomb layer, 10%, 30%, and 40% of additives (the addition amount of the mildewcide a02 was 5%, and the rest was the antibacterial agent CAG6000) were added, respectively, and the prepared honeycomb layer was subjected to antibacterial ability test.
The results of the tests on the antibacterial performance of the honeycomb layer are shown in fig. 2, and it can be seen from fig. 2 that the antibacterial rate of the honeycomb layer in the traditional mode to staphylococcus aureus, escherichia coli and candida albicans is lower than 70%, and the antibacterial rate of the honeycomb layer with the additives added is greater than 90% in 10%, 30% and 40%. On the other hand, the mildew-proof performance grade is that the honeycomb in the traditional mode is 2-grade light, the mildew on the surface of the material continuously spreads, and the surface below the mildew is still visible; and other samples are all grade 0, and the material has no mould growth.
Experimental example 2
For the panel material of the honeycomb sandwich structure, a material antibacterial performance test is carried out according to a method specified in appendix A of antibacterial plastic antibacterial performance test method and antibacterial effect (QB/T2591-. The antibacterial performance test result of the panel material is shown in table 1, wherein 0% in table 1 is a structural layer; 1.0%, 1.5%, 2.0%, 3.0%, 6.0%, 10.0%, 20.0% refers to the addition amount of the pure functional layer; 1.5A%, 3.0A%, 1.5B%, 3.0B% refer to the panels of examples 1 and 2, A representing the experimental plane as the functional plane and B representing the experimental plane as the structural plane.
As can be seen from Table 1, the structural layer corresponds to the test result of 0%, and the antibacterial rate of the structural layer to the three bacteria is lower than 50%; when the content of the additive is 1.5%, the antibacterial rate of the additive to candida albicans is only 49%, and is far lower than 80%.
1.5A% and 3.0A% respectively correspond to the panel antibacterial performance (experimental surface is functional surface) of examples 1 and 2, the antibacterial rate to the three kinds of bacteria is higher than 90%, and 1.5B% and 3.0B% compared with the three kinds of bacteria are panels with the same structure, but the experimental surface is changed from the functional layer to the structural layer, and the antibacterial rate is seen to be reduced sharply; by comparing the results of 1.5% and 1.5A%, the method can improve the antibacterial rate of Candida albicans by 30%.
TABLE 1
Figure BDA0002522815150000101
Experimental example 3
For the whole honeycomb sandwich structure, the evaluation of the antibacterial performance of the textile is carried out according to the following part 3: the material antibacterial performance test is carried out by a method specified in the oscillation method (GB/T20944.3-2008), and the mildew-proof performance is carried out according to GJB150.10A-2009 standard.
The results of the tests on the antibacterial performance of the honeycomb sandwich structures of examples 1 and 2 are shown in fig. 3, and it can be seen from fig. 3 that the antibacterial rate of the sandwich structure of the conventional mode to staphylococcus aureus, escherichia coli and candida albicans is less than 60%, and the antibacterial rate of the sandwich structure of examples 1 and 2 is more than 90%. And the mildew-proof performance grade is 0 grade in the traditional mode and the two embodiments, and the material has no mildew growth.
Experimental example 4
The mechanical properties of the pure functional layer, the pure structural layer and the hybrid structure of both (panel) of example 1 were systematically studied and the test results are listed in table 2. The structural layer has a corresponding mechanical property of 0 percent, the functional layer has a corresponding mechanical property of 7.5 percent, and the mixture has a corresponding mechanical property of 1.5A percent. It can be seen from table 2 that, with the addition of the antibacterial and antifungal agent, the overall mechanical properties show a decreasing trend, but the mechanical properties of the panel hybrid structure of the final product are generally higher than those of the pure functional layer by more than 10-20%, which not only realizes higher biological safety performance, but also is higher than that of a system with equivalent antibacterial performance by 10-20%.
TABLE 2
Parameter(s) 0％ 7.50％ 1.50A
Longitudinal tensile strength/MPa 793 530 605
Tensile modulus in the machine direction/GPa 49.5 30.2 34.5
Transverse tensile strength/MPa 798 515 654
Transverse tensile modulus/GPa 51.1 30.6 37.5
Longitudinal compressive strength/MPa 635 415 473
Modulus of longitudinal compression/GPa 63.3 33.6 40.1
Transverse compressive strength/MPa 644 398 455
Transverse compressive modulus/GPa 69.4 31.1 38.3
Longitudinal bending strength/MPa 906 661 767
Flexural modulus in the machine direction/GPa 44.5 32.1 35.6
Transverse bending strength/MPa 901 559 668
Transverse flexural modulus/GPa 42.8 30.4 33.9
Longitudinal layer shear strength/MPa 59.0 56.1 69
Transverse layer shear strength/MPa 56.0 54.0 59.9
The invention has been described in detail with reference to specific embodiments and illustrative examples, but the description is not intended to be construed in a limiting sense. Those skilled in the art will appreciate that various equivalent substitutions, modifications or improvements may be made to the technical solution of the present invention and its embodiments without departing from the spirit and scope of the present invention, which fall within the scope of the present invention. The scope of the invention is defined by the appended claims.
Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.

Claims (9)

1. A structure and biosafety integrated light honeycomb sandwich structure is characterized by comprising two functional layers, two structural layers and a honeycomb layer, wherein the two structural layers are symmetrically arranged on two sides of the honeycomb layer, the 0-degree direction of the tensile structural layer is consistent with the L direction of a honeycomb, and the two functional layers are symmetrically arranged on the outer sides of the two structural layers; the functional layer is formed by curing a prepreg compounded by a resin adhesive film containing inorganic antibacterial master batches and a reinforcing material; the structural layer is formed by curing a prepreg compounded by a resin adhesive film and a reinforcing material; the honeycomb layer is a paper honeycomb structure impregnated with phenolic resin added with an antibacterial agent and/or a mildew preventive.
2. The honeycomb sandwich structure according to claim 1, wherein an antibacterial agent and a mildew preventive are added into the phenolic resin impregnated in the honeycomb layer forming process, the antibacterial agent is a liquid inorganic antibacterial agent CAG6000, and the mildew preventive is mildew preventive A02.
3. The honeycomb sandwich structure according to claim 2, wherein the antibacterial agent is added in an amount of 5-45 wt% of the phenolic resin dry glue, and the mildewproof agent is added in an amount of 5-10 wt% of the phenolic resin dry glue.
4. The honeycomb sandwich structure of claim 1, wherein the inorganic antibacterial masterbatch is the inorganic antibacterial masterbatch RHA-TA in the functional layer.
5. The honeycomb sandwich structure according to claim 4, wherein the inorganic antibacterial masterbatch is added in the functional layer in an amount of 2-20 wt% of the dry resin adhesive.
6. The honeycomb sandwich structure according to claim 1, wherein in the functional layer, the reinforcing material may be selected from one or a combination of T300, T700, T800, M40J high performance carbon fiber, glass fiber, aramid fiber unidirectional tape or two-dimensional fabric thereof;
the resin may be selected from one or a combination of epoxy, bismaleimide, cyanate ester, polyimide, or phthalonitrile resin systems.
7. The honeycomb sandwich structure of claim 1, wherein in the structural layer, the reinforcing material can be selected from one or a combination of T300, T700, T800, M40J high-performance carbon fiber, glass fiber, aramid fiber unidirectional tape or two-dimensional fabric thereof;
the resin may be selected from one or a combination of epoxy, bismaleimide, cyanate ester, polyimide, or phthalonitrile resin systems.
8. A method for preparing a light honeycomb sandwich structure with integrated structure and biosafety, which is used for preparing the light honeycomb sandwich structure with integrated structure and biosafety of any one of claims 1 to 7, and comprises the following steps:
step 1, preparing a functional layer raw material: selecting inorganic antibacterial master batches as additives, fully mixing the additives with resin, coating the mixture to form a film, and preparing the film and a reinforcing material into uniform dry prepreg;
step 2, preparing raw materials of a structural layer: selecting a resin system and a reinforcing material which are the same as those of the functional layer, and compounding the resin system and the reinforcing material into a dry prepreg, wherein the structural layer does not contain inorganic antibacterial master batches;
step 3, preparing a honeycomb layer raw material: in the gum dipping process of the paper honeycomb preparation, adding an antibacterial agent and/or a mildew preventive into phenolic resin, dipping gum, and preparing semi-cured or cured honeycomb according to the final molding requirement;
step 4, forming: designing the proportion of the functional layer and the structural layer according to the actual working condition requirements, then sequentially paving the functional layer and the structural layer on a panel mould, and curing and molding the autoclave to form an integrated panel;
and then sequentially placing the panel with the functional layer on the outer side, the glue film, the honeycomb layer, the glue film and the panel with the functional layer on the outer side in an assembly mold, and curing and molding the panel by using an autoclave.
9. The method according to claim 8, wherein in step 4, the number of structural layers is much greater than that of functional layers, and the number of functional layers is controlled to be 4 or less.
CN202010495942.7A 2020-06-03 2020-06-03 Light honeycomb sandwich structure integrating structure and biological safety and preparation method thereof Pending CN111775517A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010495942.7A CN111775517A (en) 2020-06-03 2020-06-03 Light honeycomb sandwich structure integrating structure and biological safety and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010495942.7A CN111775517A (en) 2020-06-03 2020-06-03 Light honeycomb sandwich structure integrating structure and biological safety and preparation method thereof

Publications (1)

Publication Number Publication Date
CN111775517A true CN111775517A (en) 2020-10-16

Family

ID=72753307

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010495942.7A Pending CN111775517A (en) 2020-06-03 2020-06-03 Light honeycomb sandwich structure integrating structure and biological safety and preparation method thereof

Country Status (1)

Country Link
CN (1) CN111775517A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114438821A (en) * 2021-12-30 2022-05-06 四川大学 Preparation method of antibacterial and mildewproof aramid paper or cloth

Citations (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0675796A1 (en) * 1992-12-23 1995-10-11 United Technologies Corporation A composite molding apparatus and method for high pressure co-cure molding of lightweight honeycomb core composite articles having ramped surfaces utilizing low density, stabilized ramped honeycomb cores and product formed thereby
CN2873482Y (en) * 2006-01-13 2007-02-28 许刚 Fire-proof type high strength heat insulation multilayer honeycomb corrugate board
CN100999147A (en) * 2006-01-11 2007-07-18 许刚 Production technology of fire-proof high strength heat insulating corrugated paper cellular composite material
CN101073933A (en) * 2006-05-19 2007-11-21 许刚 Production of engineering corrugated honeycomb with fire-retarding and mould-proof functions
CN203623070U (en) * 2013-12-25 2014-06-04 东北林业大学 Environment improvement functional type tripolycyanamide impregnated paper veneer
CN103862764A (en) * 2013-12-23 2014-06-18 中航复合材料有限责任公司 Method for preparing honeycomb interlayer structure composite material by adopting liquid formation technology
CN104018387A (en) * 2014-04-25 2014-09-03 江阴比图特种纸板有限公司 Manufacturing method of mould-proof packaging lining paperboard
CN104527145A (en) * 2015-01-13 2015-04-22 正业包装（中山）有限公司 High-strength and high-pressure-resistance composite paperboard
CN104693594A (en) * 2013-12-05 2015-06-10 辽宁辽杰科技有限公司 Two-way continuous fiber reinforced polypropylene antibacterial composite material and preparation method thereof
CN106183230A (en) * 2016-07-18 2016-12-07 刘世超 A kind of antibacterial high-frequency copper-clad plate
CN106364071A (en) * 2016-08-31 2017-02-01 河南永威安防股份有限公司 Antibacterial, mould proof, corrosion-resistant and fireproof high pressure decorative sheet and production method thereof
CN206201613U (en) * 2016-08-31 2017-05-31 河南永威安防股份有限公司 A kind of corrosion-resistant fireproof high-pressure decorating plate of antibacterial and mouldproof
WO2017132729A1 (en) * 2016-02-02 2017-08-10 Thermasorb Pty Ltd Longlife packaging
CN206653701U (en) * 2017-01-27 2017-11-21 江门盈骅光电科技有限公司 A kind of Carbon fiber laminated board of high intensity
CN107399110A (en) * 2017-07-31 2017-11-28 青岛长木科技有限公司 A kind of winged flying vehicle compartment board
CN107571577A (en) * 2016-07-04 2018-01-12 广州金发碳纤维新材料发展有限公司 A kind of composite panel and preparation method thereof
CN207128349U (en) * 2017-06-08 2018-03-23 汕头市柏瑞纸品包装厂有限公司 One kind is packed for the multi-functional composite honeycomb cardboard of environment protection type high-strength
CN108026300A (en) * 2015-12-21 2018-05-11 Dic株式会社 Prepreg and products formed
CN108202511A (en) * 2016-12-19 2018-06-26 比亚迪股份有限公司 A kind of composite material for preparing battery tray, battery tray and preparation method thereof
CN109849479A (en) * 2019-01-29 2019-06-07 连云港市工业投资集团有限公司 A kind of honeycomb type carbon fibre composite trim panel and preparation method thereof
CN111040302A (en) * 2019-12-27 2020-04-21 王圭平 Box for preventing acarid, bacteria and mould

Patent Citations (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0675796A1 (en) * 1992-12-23 1995-10-11 United Technologies Corporation A composite molding apparatus and method for high pressure co-cure molding of lightweight honeycomb core composite articles having ramped surfaces utilizing low density, stabilized ramped honeycomb cores and product formed thereby
CN100999147A (en) * 2006-01-11 2007-07-18 许刚 Production technology of fire-proof high strength heat insulating corrugated paper cellular composite material
CN2873482Y (en) * 2006-01-13 2007-02-28 许刚 Fire-proof type high strength heat insulation multilayer honeycomb corrugate board
CN101073933A (en) * 2006-05-19 2007-11-21 许刚 Production of engineering corrugated honeycomb with fire-retarding and mould-proof functions
CN104693594A (en) * 2013-12-05 2015-06-10 辽宁辽杰科技有限公司 Two-way continuous fiber reinforced polypropylene antibacterial composite material and preparation method thereof
CN103862764A (en) * 2013-12-23 2014-06-18 中航复合材料有限责任公司 Method for preparing honeycomb interlayer structure composite material by adopting liquid formation technology
CN203623070U (en) * 2013-12-25 2014-06-04 东北林业大学 Environment improvement functional type tripolycyanamide impregnated paper veneer
CN104018387A (en) * 2014-04-25 2014-09-03 江阴比图特种纸板有限公司 Manufacturing method of mould-proof packaging lining paperboard
CN104527145A (en) * 2015-01-13 2015-04-22 正业包装（中山）有限公司 High-strength and high-pressure-resistance composite paperboard
CN108026300A (en) * 2015-12-21 2018-05-11 Dic株式会社 Prepreg and products formed
WO2017132729A1 (en) * 2016-02-02 2017-08-10 Thermasorb Pty Ltd Longlife packaging
CN107571577A (en) * 2016-07-04 2018-01-12 广州金发碳纤维新材料发展有限公司 A kind of composite panel and preparation method thereof
CN106183230A (en) * 2016-07-18 2016-12-07 刘世超 A kind of antibacterial high-frequency copper-clad plate
CN206201613U (en) * 2016-08-31 2017-05-31 河南永威安防股份有限公司 A kind of corrosion-resistant fireproof high-pressure decorating plate of antibacterial and mouldproof
CN106364071A (en) * 2016-08-31 2017-02-01 河南永威安防股份有限公司 Antibacterial, mould proof, corrosion-resistant and fireproof high pressure decorative sheet and production method thereof
CN108202511A (en) * 2016-12-19 2018-06-26 比亚迪股份有限公司 A kind of composite material for preparing battery tray, battery tray and preparation method thereof
CN206653701U (en) * 2017-01-27 2017-11-21 江门盈骅光电科技有限公司 A kind of Carbon fiber laminated board of high intensity
CN207128349U (en) * 2017-06-08 2018-03-23 汕头市柏瑞纸品包装厂有限公司 One kind is packed for the multi-functional composite honeycomb cardboard of environment protection type high-strength
CN107399110A (en) * 2017-07-31 2017-11-28 青岛长木科技有限公司 A kind of winged flying vehicle compartment board
CN109849479A (en) * 2019-01-29 2019-06-07 连云港市工业投资集团有限公司 A kind of honeycomb type carbon fibre composite trim panel and preparation method thereof
CN111040302A (en) * 2019-12-27 2020-04-21 王圭平 Box for preventing acarid, bacteria and mould

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114438821A (en) * 2021-12-30 2022-05-06 四川大学 Preparation method of antibacterial and mildewproof aramid paper or cloth

Similar Documents

Publication Publication Date Title
Nagavally Composite materials-history, types, fabrication techniques, advantages, and applications
CN107118437B (en) Lower shrinkage, Long Glass Fiber Reinforced PP Composite of low warpage and its preparation method and application
EP2990185B1 (en) Composite material including unidirectional continuous fibers and thermoplastic resin
EP2889438A1 (en) Core material for sandwich panel and method for manufacturing same, and sandwich panel comprising core material
EP3395530B1 (en) Methods for producing structure
JPWO2018079475A1 (en) Prepreg laminate, fiber reinforced composite material, and method for producing fiber reinforced composite material
Ren et al. Hybrid effect on mechanical properties of M40‐T300 carbon fiber reinforced Bisphenol A Dicyanate ester composites
CN109867916A (en) Plant fiber reinforced resin based composites and preparation method thereof
CN111775517A (en) Light honeycomb sandwich structure integrating structure and biological safety and preparation method thereof
CN102683850B (en) Fiberglass radome and preparation method thereof
CN112961464A (en) High-performance large-tow carbon fiber composite material and preparation method thereof
EP0326409A1 (en) Hybrid yarn, unidirectional hybrid prepreg and laminated material thereof
EP4112794A1 (en) Stitched reinforcing fiber base material, preform material, fiber reinforced composite material, and manufacturing methods for same
CN110791053A (en) Epoxy resin composition containing microcapsule curing agent, and prepreg and composite material thereof
EP2732946B1 (en) Composite, component therefrom and method for producing the same
US20030211792A1 (en) Continuous filament mat binder system
CN107415285B (en) Melt impregnation preparation method of continuous fiber reinforced thermoplastic resin prepreg tape with low porosity
WO2021172247A1 (en) Stitched reinforcing fiber base material, preform material, fiber reinforced composite material, and manufacturing methods for same
Sellamuthu et al. Water absorption behavior of kenaf/areca reinforced hybrid composites
McCrary-Dennis et al. Development of the displaced foam dispersion technique for the manufacture of multiscale composites
CN112677602A (en) Toughening material for prepreg, high-toughness composite material and preparation method of high-toughness composite material
CN112679908A (en) Prepreg toughening material, high-toughness prepreg and preparation method thereof
Prabu et al. A review on mechanical properties of intra-layer palm fiber (palmyra spout)–flax–s-glass fiber reinforced composite
KR101925222B1 (en) Electro Magnetic Shielding Materials Using Chop of Metal Foil and Process for Producing The Same
US20240026108A1 (en) Plastic composite with improved physical properties

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20201016

RJ01 Rejection of invention patent application after publication