CN116285816A - Engineering reinforcing structure adhesive - Google Patents

Engineering reinforcing structure adhesive Download PDF

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Publication number
CN116285816A
CN116285816A CN202310313761.1A CN202310313761A CN116285816A CN 116285816 A CN116285816 A CN 116285816A CN 202310313761 A CN202310313761 A CN 202310313761A CN 116285816 A CN116285816 A CN 116285816A
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component
epoxy resin
parts
agent
calcium carbonate
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施政
刘波
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Guabang Shanghai New Material Technology Co ltd
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Guabang Shanghai New Material Technology Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/04—Non-macromolecular additives inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/08—Macromolecular additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C08K2003/265—Calcium, strontium or barium carbonate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/04—Polymer mixtures characterised by other features containing interpenetrating networks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

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  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

The invention discloses an engineering reinforcing structure adhesive which comprises a component A and a component B, wherein the weight part ratio of the component A to the component B is 2:1, the components in the component A are prepared from the following components in parts by weight: 60-100 parts of epoxy resin; 8-15 parts of toughening agent; 1-5 parts of reactive diluent; 1-3 parts of thixotropic agent A; 0.5-1 part of surfactant; the component B comprises the following components in parts by weight: 50-80 parts of curing agent; 1-2 parts of a promoter; 0.1 to 1 part of thixotropic agent B; 1-3 parts of silane coupling agent. The engineering reinforcing structure adhesive provided by the invention has good strength, better toughness, no cracking sagging phenomenon, good durability and high temperature resistance, obviously improved comprehensive performance and capability of better meeting reinforcing requirements in various engineering environments.

Description

Engineering reinforcing structure adhesive
Technical Field
The invention relates to a structural adhesive, in particular to an engineering reinforcing structural adhesive.
Background
Structural adhesives are commonly used for bonding engineering structural members, also known as engineering/structural adhesives, and are a class of adhesives that can withstand many stress environments within a nominal time without being damaged. The structural adhesive is mainly used for bonding stress structural members, can bear larger load, has better mechanical strength at the working temperature above normal temperature, has the characteristics of chemical resistance, other mediums, aging resistance and the like, and is an adhesive variety used in industry. The structural adhesive has high strength, stripping resistance, impact resistance and simple construction process, is used for bonding the same material or different materials, and can partially replace the traditional connection modes such as welding, riveting, bolting and the like.
The carbon fiber glue is a structural glue widely applied in engineering, can be applied to effective penetration adhesion between a base material and a carbon fiber fabric, and can be suitable for a plurality of base materials and fabrics. The carbon fiber has low adhesiveness, good wettability and certain thixotropic property; the carbon fiber glue completely permeates the fiber products and effectively adheres the fiber products to the surface of the structural member, so that the structural member is reinforced.
The existing carbon fiber adhesive can basically meet the requirements of house reinforcement, bridge reinforcement, chimney reinforcement, crack repair and water leakage maintenance, but the problems of insufficient permeability, poor compressive strength and toughness and the like still exist, and sagging phenomenon caused by uneven surface tension still occurs. In addition, the high temperature resistance and durability of the existing carbon fiber adhesive are still to be improved, and the stress distribution of the bonding surface is also to be further improved, so that no thermal influence and deformation influence on parts are ensured. Accordingly, there is a need for continued improvement over existing engineering reinforced structural adhesives to further enhance their overall performance.
Disclosure of Invention
The technical problem to be solved by the invention is to provide the engineering reinforcing structure adhesive which has good strength, better toughness, no cracking sagging phenomenon, good durability and high temperature resistance, obviously improved comprehensive performance and capability of better meeting the reinforcing requirements in various engineering environments.
The technical scheme adopted by the invention for solving the technical problems is to provide an engineering reinforcing structure adhesive, which comprises a component A and a component B, wherein the weight ratio of the component A to the component B is 2:1, the components in the component A are prepared from the following components in parts by weight:
Figure BDA0004149463200000021
the component B comprises the following components in parts by weight:
Figure BDA0004149463200000022
further, the epoxy resin in the component A is one or more of bisphenol A epoxy resin, bisphenol F epoxy resin, o-cresol epoxy resin, p-aminophenol epoxy resin, rubber modified epoxy resin and polyurethane modified epoxy resin, and the epoxy value is 0.45-0.55 eq/100g.
Further, the toughening agent in the component A is prepared from carboxyl-terminated liquid nitrile rubber, polyimide resin and nano calcium carbonate according to the mass ratio of 1:0.2 to 0.3:0.1 to 0.2.
Further, the polyimide resin is prepared by dissolving dialkyl ester of aromatic tetracarboxylic acid, aromatic diamine and monoalkyl ester monomer of 5-norbornene-2, 3-dicarboxylic acid in alkyl alcohol, performing low-temperature polycondensation to obtain soluble polyamic acid, converting the polyamic acid into polyisoimide, and converting the polyisoimide into polyimide.
Further, the nano calcium carbonate is modified by long-chain fatty acid, and the mass ratio of the long-chain fatty acid to the dodecanoic acid to the hexadecanoic acid to the octadecanoic acid is 1: 2-3: 5-10.
Further, the thixotropic agent A in the component A is fumed silica, the particle size of the fumed silica aggregate is 200-500nm, and the specific surface area is 100-400 m 2 /g; after the component A and the component B are mixed, the dispersion particle size of the nano calcium carbonate is controlled to be tens of micrometers through mechanical stirring, then the dispersion particle size of the nano calcium carbonate is controlled to be a few micrometers through ultrasonic vibration, and finally the dispersion particle size of the silicon dioxide and the nano calcium carbonate is controlled to be 80-120nm under the action of a silane coupling agent.
Further, the active diluent in the component A is one or two of benzyl glycidyl ether, butyl glycidyl ether and butanediol diglycidyl ether, and the surfactant in the component A is an ethoxy nonionic fluorocarbon surfactant.
Further, the curing agent in the component B comprises the following components in percentage by mass: 0.1 to 0.2 of polyamide curing agent and m-phenylenediamine curing agent.
Further, the thixotropic agent B in the component B is polyamide wax, and the average particle diameter D50 of the polyamide wax is 5-8um.
Further, the accelerator in the component B is 2, 4, 6-tri (dimethylaminomethyl) phenol, and the silane coupling agent in the component B is gamma-aminopropyl triethoxysilane.
Compared with the prior art, the invention has the following beneficial effects: according to the engineering reinforcing structure adhesive provided by the invention, the toughening agent continuously penetrates through the epoxy resin network to form a semi-interpenetrating network type polymer, so that the toughness of an epoxy resin cured product is improved; the epoxy groups form a function far greater than Van der Waals force with the nano particles on the interface, so that microcracks can be well initiated, and energy is absorbed. The nano particles have good compatibility with resin, so that the dispersion capacity and the absorption capacity of the matrix to impact energy are improved, and the toughness is increased. In addition, the invention optimizes the granularity, the content and the preparation process of each component based on the close packing theory, and finally obtains the engineering reinforcing structure adhesive with excellent comprehensive performance; the composite material has good strength, better toughness, no cracking sagging phenomenon, good durability and high temperature resistance, obviously improved comprehensive performance and capability of better meeting the reinforcement requirements in various engineering environments.
Detailed Description
The invention is further described below with reference to examples.
The invention provides an engineering reinforcing structure adhesive, which comprises a component A and a component B, wherein the weight part ratio of the component A to the component B is 2:1, a step of;
the component A comprises the following components in parts by weight:
Figure BDA0004149463200000031
the component B comprises the following components in parts by weight:
Figure BDA0004149463200000032
the reaction of the epoxy resin and the curing agent used is carried out by direct addition reaction or ring-opening polymerization of the epoxy groups in the resin molecule, without the evolution of water or other volatile byproducts. Epoxy resins exhibit very low shrinkage (less than 2%) during curing compared to unsaturated polyester resins, phenolic resins; therefore, the epoxy resin in the component A is one or more of bisphenol A type epoxy resin, bisphenol F type epoxy resin, o-cresol type epoxy resin, p-aminophenol epoxy resin, rubber modified epoxy resin and polyurethane modified epoxy resin, and the epoxy value is 0.45-0.55 eq/100g. The higher the epoxy value, the higher the degree of crosslinking, but the more brittle the cured product.
The toughening agent generally contains active groups, can chemically react with the resin, is not completely compatible after curing, and sometimes needs to be split in phase, so that a relatively ideal toughening effect can be obtained, the thermal deformation temperature is unchanged or is reduced slightly, and the impact resistance is obviously improved. For epoxy adhesives, optional toughening agents include carboxyl liquid nitrile rubber, carboxyl-terminated liquid nitrile rubber, polysulfide rubber, liquid silicone rubber, polyether, polysulfone, polyimide, nano calcium carbonate, nano titanium dioxide, and the like. Some toughening agents can reduce brittleness, but the rigidity, strength and heat distortion temperature are greatly reduced. Some of the modified epoxy resin is miscible with resin, contains active groups, can participate in the curing reaction of the resin, and improves the elongation at break and the impact strength, but reduces the heat distortion temperature. It can be seen that different types of toughening agents have different toughening mechanisms, and how to select the proper toughening agent is particularly important in order to obtain good comprehensive properties.
Preferably, the toughening agent in the component A comprises carboxyl-terminated liquid nitrile rubber, polyimide resin and nano calcium carbonate according to the mass ratio of 1:0.2 to 0.3:0.1 to 0.2. The carboxyl-terminated liquid nitrile rubber toughened epoxy resin is compatible before curing, and phase separates after curing to form a sea-island structure, so that impact energy can be absorbed, and heat resistance is not reduced basically. The epoxy resin curing agent is not softened integrally, but a homogeneous phase system of an epoxy resin curing agent is changed into a heterogeneous system, namely, a toughening agent is aggregated into spherical particles to form a disperse phase in a continuous phase formed by a crosslinked network of the epoxy resin, the cracking resistance is suddenly changed, the fracture toughness is obviously improved, but the mechanical property and the heat resistance are less lost.
Polyimide (abbreviated as PI) contains an unsaturated group imide ring (-CO-NR-CO-) on a main chain, and is one of organic high polymer materials with optimal comprehensive performance when in use. The high temperature resistance reaches more than 400 ℃, and the long-term use temperature range is-200-300 ℃; tensile strength is 190MPa, bending strength is 250MPa, and thermal deformation temperature is up to 274 ℃ under the load of 1.8 MPa; has excellent high-temperature mechanical property, dielectric property and radiation resistance, and solves the difficult problems of lower upper limit heat-resistant temperature of other organic adhesives. The polyimide resin is prepared by dissolving dialkyl ester of aromatic tetracarboxylic acid, aromatic diamine and monoalkyl ester monomer of 5-norbornene-2, 3-dicarboxylic acid in alkyl alcohol (such as methanol or ethanol) to perform low-temperature polycondensation to obtain soluble polyamic acid, converting the polyamic acid into polyisoimide, and converting the polyisoimide into polyimide, so that the solubility is improved, and the polyimide resin is better used for impregnating fibers.
The non-polar material has poor coating property as the filler, so that the filler is subjected to surface treatment, and if the surface treating agent is improperly selected, the treating agent may not be completely coated on the surface of the filler, so that the filler and the resin are not well combined to lose the modifying effect, or the treating agent forms a layer of bilayer membrane on the surface of the filler, and the treating effect is also deteriorated. Preferably, the reactive diluent in the component A is one or two of benzyl glycidyl ether, butyl glycidyl ether and butanediol diglycidyl ether, and the surfactant in the component A is an ethoxy nonionic fluorocarbon surfactant.
Nano calcium carbonate is an inorganic material with hydrophilic and oleophobic surface, has poor affinity with organisms, and is easy to form agglomerates to cause the performance of the material to be reduced; in addition, the nano calcium carbonate has small particle size, strong phase action force among the particles with multiple surface atoms, and easy formation of agglomeration of nano calcium carbonate powder. Therefore, the invention carries out modification treatment on the surface of superfine calcium carbonate, and the nano calcium carbonate is modified by long-chain fatty acid. As a result, it was found that the addition of long chain fatty acids did not affect the crystalline form of calcium carbonate, but did affect the morphology of the calcium carbonate particles produced. A certain amount of lauric acid is added, so that the dispersibility of calcium carbonate particles can be improved; when the addition amount of palmitic acid and stearic acid reaches a certain level, a micro rod-like structure and a spindle-like structure are formed. Preferably, the long-chain fatty acid consists of dodecanoic acid (lauric acid), hexadecanoic acid (palmitic acid) and octadecanoic acid (stearic acid) according to a mass ratio of 1: 2-3: 5-10, thereby well avoiding agglomeration of calcium carbonate powder, further improving the filling density of particles and having the characteristics of high strength and high toughness. The result shows that the nano calcium carbonate after the surface modification of the long-chain fatty acid eliminates the hydrophilicity of the nano calcium carbonate, greatly increases the compatibility with a polymer matrix, and the nano calcium carbonate after the surface modification can greatly improve the mechanical properties and thermodynamic properties of the composite material such as tensile strength, elongation, wear resistance, flame retardance and the like. The surface modification can also generate strong adhesive force, so that the polymer chain is firmer, the thermal stability of the polymer is improved, and the polymer toughening agent can be coupled with the polymer toughening agent.
The thixotropic agent is added into the epoxy resin, so that the resin glue solution has higher consistency when the epoxy resin is static, and becomes a substance of low-consistency fluid under the action of external force. Preferably, the thixotropic agent A in the component A is fumed silica, and the surface untreated fumed silica aggregate contains various silicon hydroxyl groups, is bonded in an epoxy resin network, is extremely easy to form a three-dimensional network structure, and can be destroyed when being influenced by mechanical force so as to reduce viscosity, and the liquid phase system recovers good fluidity, thereby being beneficial to the flowing of the coating and easy to construct; when the shearing force is eliminated, the three-dimensional structure can recover by itself, the viscosity rises, and pigment sedimentation and wet film sagging can be prevented.
In addition, generally in the construction process, the solvent at the edge of the coating volatilizes fast, so that the surface tension is uneven, the liquid is easy to move towards the edge, and the silica network can effectively prevent the liquid from moving to form thick edges, thereby better preventing the sagging phenomenon of the liquid in the curing process and ensuring the coating to be uniform.
The smaller the particle size of the toughening agent is generally required to be, the better the smaller the particle size is, the higher the dispersion effect of the elastomer is, the larger the specific surface area is, the better the silver streak inducing and stopping effects are, and the better the impact toughness of the material is. The primary particle diameter of the fumed silica is between 7 and 80nm, and the specific surface area is generally more than 100m 2 /g; but the aggregate grain diameter is 200-500nm, the specific surface area is 100-400 m 2 /g; the nano particles greatly improve the toughness, strength, rigidity and other properties of the epoxy resin.
The key to toughening epoxy resins is the uniform dispersion of the components, particularly the thixotropic agent and curing agent, as uniformly as possible in the epoxy resin network. Therefore, the invention optimizes the granularity, the content and the preparation process of each component based on the close packing theory.
Preferably, after the component A and the component B are mixed, the dispersion particle size of the nano calcium carbonate is controlled to be tens of micrometers through mechanical stirring, then the nano calcium carbonate is enabled to be dispersed to be a plurality of micrometers through ultrasonic vibration, and finally under the action of a silane coupling agent, KH-550 silane coupling agent (gamma-aminopropyl triethoxysilane) is preferably selected; so that the dispersion particle size of the silicon dioxide and the nano calcium carbonate reaches 80-120nm.
The stress field around the large particles is larger than that of the small particles, and the stress fields of adjacent large particles can be overlapped with each other under the condition of the same inter-particle distance so as to achieve the brittle-ductile transition. Therefore, the thixotropic agent B in the component B is polyamide wax, the addition amount of polyamide compounds (polyamide wax) is small, the effect is obvious, and the average particle diameter D50 of the polyamide wax is 5-8um; the larger particles of the thixotropic polyamide wax are dispersed in the epoxy resin network, and the smaller particles of the thixotropic silica are dispersed and filled in the gaps among the polyamide wax particles, so that the toughness of the material is more outstanding. Meanwhile, epoxy groups and nano particles form a function far greater than Van der Waals force on an interface, microcracks can be well initiated, and energy is absorbed. The nano particles can initiate silver lines and terminate cracks; when the crack propagates, it encounters the nano particle to generate the sheath direction or deflection, and absorbs the energy to reach the toughening purpose.
The curing agents are classified according to chemical composition: 1. aliphatic amines, such as vinyltriamine DETA aminoethylpiperazine AE; 2. aromatic amines, such as m-phenylenediamine m-PDA MPD diaminodiphenylmethane DDM HT-972DEH-50; 3. amidoamines; 4. latent curing amines; 5. urea substitutes. The main properties of each curing agent are as follows:
pot life: (long) aromatic- & gt amide- & gt alicyclic- & gt aliphatic (short)
Softness: (Soft) Polyamide → aliphatic → alicyclic → aromatic (rigid)
Adhesion: (preferred) polyamides → cycloaliphatic → aliphatic → aromatic (good)
Acid resistance: aromatic- & gt alicyclic- & gt aliphatic- & gt polyamide (inferior)
Water resistance: (preferred) polyamides → aliphatic amines → alicyclic amines → aromatic amines (good)
From the above, it is seen that polyamide curing agents have excellent properties in terms of flexibility, adhesion, water resistance, while m-phenylenediamine curing agents are aromatic amines and have excellent properties in terms of pot life and acid resistance. For this purpose, the curing agent in the component B of the invention comprises the following components in mass ratio of 1:0.1 to 0.2 of polyamide curing agent and m-phenylenediamine curing agent to improve the comprehensive curing performance; can be cured at room temperature, and can further improve heat resistance while increasing toughness of the cured product.
The accelerator in component B of the present invention is 2, 4, 6-tris (dimethylaminomethyl) phenol (DMP-30), which is an amine-based trimerization catalyst having a delayed reaction rigid polyisocyanurate.
The present invention will be described in detail and in detail by way of the following examples, which are not intended to limit the scope of the invention, for better understanding of the invention.
Example 1
The engineering reinforcing structure adhesive of the embodiment comprises a first component and a second component, wherein the weight part ratio of the first component to the second component is 2:1, a step of;
the component A comprises the following components in parts by weight:
Figure BDA0004149463200000071
the component B comprises the following components in parts by weight:
Figure BDA0004149463200000072
the construction operation flow comprises the steps of glue preparation, stirring, brushing, secondary brushing and solidification, and comprises the following specific steps:
and (3) glue preparation: during construction, the component A and the component B of the carbon fiber glue are prepared according to the following weight ratio of 2:1, weighing the proportion of the raw materials;
stirring: pouring the mixture into a clean container for uniform stirring, firstly adopting a mechanical stirring mode to stir along the same direction, avoiding air mixing to the greatest extent to form bubbles, and then carrying out ultrasonic vibration to uniformly disperse all the components;
and (3) brushing: uniformly smearing the carbon fiber glue on the stuck part, and properly smearing a plurality of corner parts;
and (3) secondary brushing: coating glue on the outer surface of the carbon fiber cloth uniformly, and repeatedly rolling to enable the carbon glue to fully clean the carbon fiber cloth in two directions;
curing: after the glue is solidified, the solidifying time is determined according to the field temperature, and the glue is suitable for drying by touching, and the next working procedure is generally carried out for not less than 2 hours.
Example 2
The engineering reinforcing structure adhesive of the embodiment comprises a first component and a second component, wherein the weight part ratio of the first component to the second component is 2:1, a step of;
the component A comprises the following components in parts by weight:
Figure BDA0004149463200000081
the component B comprises the following components in parts by weight:
Figure BDA0004149463200000082
the toughening agent in the component A is prepared from carboxyl-terminated liquid nitrile rubber, polyimide resin and nano calcium carbonate according to the mass ratio of 1:0.2 to 0.3:0.1 to 0.2; the curing agent in the component B comprises the following components in percentage by mass: 0.1 to 0.2 of polyamide curing agent and m-phenylenediamine curing agent; the construction operation procedure was the same as in example 1.
Example 3
The engineering reinforcing structure adhesive of the embodiment comprises a first component and a second component, wherein the weight part ratio of the first component to the second component is 2:1, a step of;
the component A comprises the following components in parts by weight:
Figure BDA0004149463200000083
the component B comprises the following components in parts by weight:
Figure BDA0004149463200000084
Figure BDA0004149463200000091
the construction operation procedure was the same as in example 1.
According to the engineering reinforced structure adhesive prepared by the embodiment of the invention, the toughening agent continuously penetrates through the epoxy resin network to form a semi-interpenetrating network type polymer, so that the toughness of the epoxy resin cured product is improved; the epoxy groups and the nano particles form a function far greater than Van der Waals force on the interface, so that microcracks can be well initiated, and energy is absorbed; the composite material has good strength, better toughness, no cracking sagging phenomenon, good durability and high temperature resistance, obviously improved comprehensive performance, and can better meet the reinforcement requirements under various engineering environments, such as important tunnels, subways, airports, elevated road beds, spillways, explosion-proof and shock-proof engineering and the like. The comprehensive performance of the engineering reinforced structure adhesive and the common structure adhesive of the invention are compared as follows by referring to the standards of resin casting body performance test method (GB/T2567-2008), engineering structure reinforced material safety identification technical specification (GB 50728-2011) and the like:
Figure BDA0004149463200000092
Figure BDA0004149463200000101
the test condition of the wet heat aging resistance is 50 ℃ and RH is 98%, after aging for 90d, the steel is cooled to room temperature to carry out steel-to-steel tensile shear test, and compared with the short-term test result at room temperature, the shear strength reduction rate (%);
after aging for 30d at (80+ -2) deg.C, the tensile shear strength test of steel to steel was performed at the same temperature, and the shear strength decrease (%) was compared with the short-term test result at the same temperature for 10 min;
the test condition of freeze thawing resistance is that the steel-to-steel tensile shear test is carried out at room temperature after each cycle for 8 hours at the freeze thawing cycle temperature of-25 ℃ to 35 ℃ and 50 cycles, and compared with the short-term test result at room temperature, the shear strength reduction rate (%);
the test condition of the long-term stress resistance is (23+/-2) DEGC, (50+/-5)% RH environment, and the test condition is that the test condition bears the continuous action 210d, mm of the shearing stress of 4.0 MPa;
the test condition of fatigue stress resistance is that at room temperature, the frequency is 20Hz, and the stress ratio is 5:1.5, carrying out a steel-to-steel tensile shear test under a fatigue load with a maximum stress of 4.0 MPa;
salt spray resistance: 5% NaCl solution, spraying pressure of 0.08MPa and test temperature (35+/-2) DEG C; spraying every 0.5h, wherein the salt mist is freely settled on a test piece every 0.5h, the action duration is 90d, and the tensile shear strength test of steel to steel is carried out due to the expiration;
alkali-resistant medium action: ca (OH) 2 Saturated solution, test temperature (35+/-2) DEG C; soaking for 60d, and performing a steel-to-concrete forward-pulling bonding strength test after expiration;
acid-resistant medium action: 5% H 2 SO 4 Solution, test temperature (35+ -2) deg.C; and soaking for 30d, and performing a steel-to-concrete forward-pulling bonding strength test after expiration.
In summary, the engineering reinforcing structure adhesive provided by the invention has excellent comprehensive properties and is mainly characterized in that:
1. the suitability is good: the fiber has good adaptability with carbon fiber cloth and other base materials; 2. the osmotic force is strong: can well penetrate into the concrete surface layer and other base materials; 3. durability: aging resistance, water resistance and chemical corrosion resistance, and has excellent performance; 4. high strength and high toughness: the cured adhesive layer has excellent physical and mechanical properties, and has certain elasticity.
While the invention has been described with reference to the preferred embodiments, it is not intended to limit the invention thereto, and it is to be understood that other modifications and improvements may be made by those skilled in the art without departing from the spirit and scope of the invention, which is therefore defined by the appended claims.

Claims (10)

1. The engineering reinforcing structure adhesive is characterized by comprising a component A and a component B, wherein the weight part ratio of the component A to the component B is 2:1, the components in the component A are prepared from the following components in parts by weight:
Figure FDA0004149463190000011
the component B comprises the following components in parts by weight:
Figure FDA0004149463190000012
2. the engineered reinforcement structure adhesive of claim 1, wherein the epoxy resin in the component a is one or more of bisphenol a type epoxy resin, bisphenol F type epoxy resin, o-cresol type epoxy resin, p-aminophenol epoxy resin, rubber modified epoxy resin, and polyurethane modified epoxy resin, having an epoxy value of 0.45 to 0.55eq/100g.
3. The engineering reinforced structural adhesive according to claim 1, wherein the toughening agent in the component A comprises carboxyl-terminated liquid nitrile rubber, polyimide resin and nano calcium carbonate according to the mass ratio of 1:0.2 to 0.3:0.1 to 0.2.
4. The engineered cementitious reinforcing structure as set forth in claim 3, wherein the polyimide resin is prepared by dissolving dialkyl esters of aromatic tetracarboxylic acids, aromatic diamines and monoalkyl ester monomers of 5-norbornene-2, 3-dicarboxylic acids in alkyl alcohol, performing low temperature polycondensation to obtain soluble polyamic acid, converting the polyamic acid into polyisoimide, and then converting the polyisoimide into polyimide.
5. The engineering reinforced structural adhesive according to claim 3, wherein the nano calcium carbonate is modified by long-chain fatty acid, and the mass ratio of the long-chain fatty acid to the dodecanoic acid, the hexadecanoic acid and the octadecanoic acid is 1: 2-3: 5-10.
6. An engineered reinforced structural adhesive as in claim 3, wherein thixotropic agent a in the component a is fumed silica having an aggregate particle size of 200-500nm and a specific surface area of 100-400 m 2 /g; after the component A and the component B are mixed, the dispersion particle size of the nano calcium carbonate is controlled to be tens of micrometers through mechanical stirring, and then ultrasonic waves are carried outThe vibration makes the dispersed particle size of nano calcium carbonate reach several microns, and finally makes the dispersed particle size of silicon dioxide and nano calcium carbonate reach 80-120nm under the action of silane coupling agent.
7. The engineered reinforcement structure adhesive of claim 1, wherein the reactive diluent in the component a is one or both of benzyl glycidyl ether, butyl glycidyl ether, and butylene glycol diglycidyl ether, and the surfactant in the component a is an ethoxy nonionic fluorocarbon surfactant.
8. The engineered cementitious reinforcing structure as set forth in claim 1, wherein the curing agent in the b component consists of, by mass, 1:0.1 to 0.2 of polyamide curing agent and m-phenylenediamine curing agent.
9. The engineered reinforcement structure adhesive of claim 1, wherein thixotropic agent B in the B component is a polyamide wax having an average particle size D50 of 5-8um.
10. The engineered cementitious reinforcing structure of claim 1 wherein the accelerator in the b component is 2, 4, 6-tris (dimethylaminomethyl) phenol and the silane coupling agent in the b component is gamma-aminopropyl triethoxysilane.
CN202310313761.1A 2023-03-28 2023-03-28 Engineering reinforcing structure adhesive Pending CN116285816A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1570010A (en) * 2004-04-23 2005-01-26 阚小勇 Making method of epoxy resin adhesive for building
CN105969283A (en) * 2016-06-02 2016-09-28 北京中德新亚建筑技术有限公司 High-permeability anti-sagging modified epoxy resin carbon fiber adhesive
CN108929645A (en) * 2017-05-22 2018-12-04 卡本复合材料（天津）有限公司 Epoxy structural rubber is used in a kind of bridge subsection splicing of high thixotropic
CN114907802A (en) * 2022-06-09 2022-08-16 中交元洋(大连)桥梁水下检测有限公司 Carbon fiber impregnating adhesive for maintaining underwater concrete member and preparation method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1570010A (en) * 2004-04-23 2005-01-26 阚小勇 Making method of epoxy resin adhesive for building
CN105969283A (en) * 2016-06-02 2016-09-28 北京中德新亚建筑技术有限公司 High-permeability anti-sagging modified epoxy resin carbon fiber adhesive
CN108929645A (en) * 2017-05-22 2018-12-04 卡本复合材料（天津）有限公司 Epoxy structural rubber is used in a kind of bridge subsection splicing of high thixotropic
CN114907802A (en) * 2022-06-09 2022-08-16 中交元洋(大连)桥梁水下检测有限公司 Carbon fiber impregnating adhesive for maintaining underwater concrete member and preparation method thereof

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
吴培熙 等: "《碳纤维/环氧树脂复合材料改性处理》", vol. 1, 30 June 2001, 中国轻工业出版社, pages: 380 - 382 *
李晓俊 等: "《纳米材料的制备及应用研究》", vol. 1, 31 July 2006, 山东大学出版社, pages: 183 - 186 *
柴春鹏 等: "《高分子合成材料学》", vol. 1, 31 January 2019, 北京理工大学出版社 *

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