CN108727779B - Insulating and heat-conducting fiber composite material for recyclable prestressed anchor cable and preparation method thereof - Google Patents
Insulating and heat-conducting fiber composite material for recyclable prestressed anchor cable and preparation method thereof Download PDFInfo
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- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
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- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
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- C08J2361/00—Characterised by the use of condensation polymers of aldehydes or ketones; Derivatives of such polymers
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- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
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- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- C08K3/20—Oxides; Hydroxides
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- C08K3/00—Use of inorganic substances as compounding ingredients
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- C08K2003/385—Binary compounds of nitrogen with boron
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- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
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- C08K7/00—Use of ingredients characterised by shape
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- C08K7/06—Elements
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- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/14—Glass
Abstract
The invention discloses an insulating heat-conducting fiber composite material for a recyclable prestressed anchor cable and a preparation method thereof, wherein the insulating heat-conducting fiber composite material comprises the following components in parts by weight: 100 parts of matrix resin, 5-30 parts of curing agent, 10-40 parts of flame retardant, 20-50 parts of heat conducting agent, 1-10 parts of coupling agent and 30-60 parts of reinforcing fiber. The preparation method is a hand pasting method or a resin transfer molding method. The method provided by the invention is simple to operate, high in preparation success rate and low in cost. The prepared insulating and heat-conducting fiber composite material has the characteristics of high strength, good heat conductivity, good insulativity, easiness in heating and damage and the like. When the anchor is used, the anchoring section of the prestressed anchor cable can be fixed in a rock-soil body, and when the anchor is dismantled, the anchor section can be separated from the free section of the anchor cable only by heating the anchoring section, so that the partial recovery of the prestressed anchor cable is realized. Compared with the traditional mode, the construction difficulty is greatly reduced, the construction cost is low, and the follow-up construction hidden danger can not be brought.
Description
Technical Field
The invention relates to the field of polymer composite materials, in particular to an insulating heat-conducting fiber composite material for a recyclable prestressed anchor cable and a preparation method thereof.
Background
Prestressed anchoring is a measure for increasing the stability of a retaining structure or a rock-soil body by using an anchoring method. The method is that a drill hole is drilled to penetrate through a sliding surface which is possible to slide or has already slid, one end of a steel bar (or a steel cable) is fixed in a stable rock-soil body at the bottom of the hole, then the steel bar is tensioned to generate certain prestress, then the other end of the steel bar is fixed on the surface of the rock-soil body or a retaining structure, and the rock-soil body or the retaining structure which is possible to slide is pressed tightly by the resilience force of the steel bar so as to increase the shear strength on the sliding surface, thereby achieving the purpose of improving the stability of the rock-soil body or the retaining structure. The prestressed anchor cable consists of a free section and an anchoring section.
However, the traditional prestressed anchor cable is disposable and not recyclable, and can be left in the original soil layer after the function is completed, and sometimes can invade the red line of the building of the adjacent building, so that the material waste is caused, the development of the adjacent underground space is hindered, and the construction difficulty is increased.
In recent years, hot-melt type recoverable prestressed anchor cables have been developed rapidly (for example, CN206554390), and the key point of the hot-melt type recoverable prestressed anchor cables is the polymer composite material inside the anchor head. The polymer composite material in the anchor head can firmly anchor the anchor cable when the anchor cable is loaded; when the anchor cable is to be recovered, the high-molecular composite material with the anchoring effect in the anchor head can be quickly damaged after the anchor head is heated, so that the anchor cable can be conveniently recovered. This requires that the polymer composite material has good insulation and thermal conductivity, high strength and easy to be damaged by heating, which will be the focus of future research in this field, and there is no description on this kind of material.
Disclosure of Invention
The invention aims to provide an insulating and heat-conducting fiber composite material for a recyclable prestressed anchor cable and a preparation method thereof, which have the advantages of high preparation success rate, low cost and simple operation, and aims to solve the technical problems that the existing prestressed anchor cable cannot be used repeatedly, and the anchor cable is retained in an original soil layer or invades into a building red line of an adjacent building after being used, so that development of an adjacent underground space is hindered, the construction difficulty is high, the construction cost is high and the like.
The invention provides an insulating heat-conducting fiber composite material for a recyclable prestressed anchor cable, which comprises the following components in parts by weight:
100 parts by weight of a base resin,
5 to 30 parts by weight of a curing agent,
10-40 parts by weight of a flame retardant,
20-50 parts by weight of a heat-conducting agent,
1 to 10 parts by weight of a coupling agent,
30-60 parts by weight of reinforcing fibers.
Further, the matrix resin is one or more of epoxy resin, unsaturated polyester, phenolic resin and furan resin.
Further, the curing agent is one or more of aliphatic amine, alicyclic amine, aromatic amine, polyamide, methyl ethyl ketone peroxide, cyclohexanone peroxide, methyl isobutyl ketone peroxide, benzoyl peroxide, p-toluenesulfonyl chloride, cumene hydroperoxide, tert-butyl hydroperoxide, 2, 4-dichlorobenzoyl peroxide and lauroyl peroxide.
Further, the flame retardant is one or more of antimony trioxide, composite phosphorus flame retardants, aluminum hydroxide and magnesium hydroxide.
Further, the heat conducting agent is one or more of boron nitride, silicon nitride, aluminum nitride, silicon carbide, magnesium oxide and aluminum oxide.
Further, the coupling agent is one or more of gamma-aminopropyltriethoxysilane, gamma-glycidoxypropyltrimethoxysilane and gamma- (methacryloyloxy) propyltrimethoxysilane.
Further, the reinforcing fiber is one or more of glass fiber, carbon fiber and aramid fiber.
The invention also provides a preparation method of the above insulation heat-conducting fiber composite material for the recyclable prestressed anchor cable, wherein the preparation method is a hand lay-up method or a Resin Transfer Molding (RTM) method.
Further, the preparation process of the hand pasting method comprises the following steps:
preparing materials: taking 10-40 parts by weight of a flame retardant, 20-50 parts by weight of a heat conducting agent, 30-60 parts by weight of a reinforcing fiber, 1-10 parts by weight of a coupling agent, 100 parts by weight of a matrix resin and 5-30 parts by weight of a curing agent;
mixing and forming: and (2) treating the flame retardant, the heat conducting agent and the reinforcing fiber by using a coupling agent, drying, adding matrix resin and a curing agent, uniformly mixing, and manually adding the mixture into a prestressed anchor head die for curing and forming.
Further, the RTM method includes the steps of:
preparing materials, namely taking 10-40 parts by weight of a flame retardant, 20-50 parts by weight of a heat conducting agent, 30-60 parts by weight of a reinforcing fiber, 1-10 parts by weight of a coupling agent, 100 parts by weight of matrix resin and 5-30 parts by weight of a curing agent;
secondly, adding matrix resin into the flame retardant and the heat conducting agent, and uniformly mixing for later use;
and thirdly, laying the reinforcing fiber treated by the coupling agent in a prestressed anchor head mould, and then introducing the curing agent and the mixture obtained in the second step into the prestressed anchor head mould laid with the reinforcing fiber by adopting an RTM (resin transfer molding) forming method for curing and forming.
The invention has the beneficial effects that:
1. the invention relates to an insulating heat-conducting fiber composite material for a recyclable prestressed anchor cable and a preparation method thereof. The prepared insulating and heat-conducting fiber composite material has the characteristics of high strength, good heat conductivity, good insulativity, easiness in heating and damage and the like.
2. According to the insulating heat-conducting fiber composite material for the recyclable prestressed anchor cable and the preparation method thereof, the high-strength fibers are added into the insulating heat-conducting fiber composite material, so that the mechanical strength of the composite material is greatly improved; the insulating heat conducting agent is added, so that the heat transfer efficiency of the composite material is greatly improved, the composite material can be quickly damaged after being heated, and the anchor cable is convenient to recover.
3. The invention relates to an insulating heat-conducting fiber composite material for a recyclable prestressed anchor cable and a preparation method thereof, which solve the problem that the prestressed anchor cable cannot be used repeatedly. Compared with the traditional mode, the construction difficulty is greatly reduced, the construction cost is low, and the follow-up construction hidden danger can not be brought.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The primary objects and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof.
Detailed Description
As used herein, the terms "comprising," "including," "containing," "having," and "containing" are intended to be non-limiting, i.e., other steps and other ingredients can be added that do not affect the results. The above terms encompass the terms "consisting of … …" and "consisting essentially of … …". Materials, equipment and reagents are commercially available unless otherwise specified.
The invention provides an insulating heat-conducting fiber composite material for a recyclable prestressed anchor cable, which comprises the following components in parts by weight:
100 parts of matrix resin (which can be one or more of epoxy resin, unsaturated polyester, phenolic resin and furan resin);
5-30 parts by weight of a curing agent (one or more of aliphatic amine, alicyclic amine, aromatic amine, polyamide, methyl ethyl ketone peroxide, cyclohexanone peroxide, methyl isobutyl ketone peroxide, benzoyl peroxide, p-toluenesulfonyl chloride, cumene hydroperoxide, tert-butyl hydroperoxide, 2, 4-dichlorobenzoyl peroxide and lauroyl peroxide);
10-40 parts of flame retardant (one or more of antimony trioxide, composite phosphorus flame retardant, aluminum hydroxide and magnesium hydroxide);
20-50 parts by weight of a heat conducting agent (one or more of boron nitride, silicon nitride, aluminum nitride, silicon carbide, magnesium oxide and aluminum oxide);
1-10 parts by weight of a coupling agent (one or more of gamma-aminopropyltriethoxysilane, gamma-glycidoxypropyltrimethoxysilane and gamma- (methacryloyloxy) propyltrimethoxysilane);
30-60 parts of reinforcing fiber (one or more of glass fiber, carbon fiber and aramid fiber).
The invention also provides a preparation method of the insulating and heat-conducting fiber composite material for the recyclable prestressed anchor cable, and the preparation method is a hand lay-up method or a resin transfer molding method.
The hand pasting method comprises the following steps:
preparing materials: taking 10-40 parts by weight of a flame retardant, 20-50 parts by weight of a heat conducting agent, 30-60 parts by weight of a reinforcing fiber, 1-10 parts by weight of a coupling agent, 100 parts by weight of a matrix resin and 5-30 parts by weight of a curing agent;
mixing and forming: and (2) treating the flame retardant, the heat conducting agent and the reinforcing fiber by using a coupling agent, drying, adding matrix resin and a curing agent, uniformly mixing, and manually adding the mixture into a prestressed anchor head die for curing and forming.
The resin transfer molding method includes the steps of:
preparing materials, namely taking 10-40 parts by weight of a flame retardant, 20-50 parts by weight of a heat conducting agent, 30-60 parts by weight of a reinforcing fiber, 1-10 parts by weight of a coupling agent, 100 parts by weight of matrix resin and 5-30 parts by weight of a curing agent;
secondly, adding matrix resin into the flame retardant and the heat conducting agent, and uniformly mixing for later use;
and thirdly, laying the reinforcing fiber treated by the coupling agent in a prestressed anchor head mould, and then introducing the curing agent and the mixture obtained in the second step into the prestressed anchor head mould laid with the reinforcing fiber by adopting RTM (resin transfer molding) for curing and forming.
The preparation method and the specific preparation process of the insulating and heat conducting fiber composite material of the embodiments 1 to 7 in table 1 refer to the above steps.
TABLE 1 reactants and reaction conditions for examples 1-7
Table 2 performance test of the insulating and heat-conducting fiber composite materials of embodiments 1 to 7
As can be seen from the above table 2, the thermal conductivity coefficients of the insulating and heat-conducting fiber composite materials obtained in the embodiments 1 to 7 are all larger than 1.6W/m.K, the maximum loadable force of a single anchor cable is higher than 58KN, and the flame retardant grade reaches B1.
In conclusion, according to the insulating and heat-conducting fiber composite material for the recyclable prestressed anchor cable and the preparation method thereof, the obtained insulating and heat-conducting fiber composite material is high in preparation success rate and low in cost. Has the characteristics of high strength, good heat conductivity, good insulativity, easy heating damage and the like.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (4)
1. The insulating and heat-conducting fiber composite material for the recyclable prestressed anchor cable is characterized by comprising the following components in parts by weight:
100 parts by weight of a base resin,
5 to 30 parts by weight of a curing agent,
10-40 parts by weight of a flame retardant,
20-50 parts by weight of a heat-conducting agent,
1 to 10 parts by weight of a coupling agent,
30-60 parts by weight of reinforcing fibers;
the thermal conductivity coefficient of the insulating and heat-conducting fiber composite material is greater than 1.6W/m.K, and the loadable force of a single anchor cable is higher than 58 KN;
wherein the matrix resin is one of epoxy resin, unsaturated polyester and phenolic resin;
the curing agent is one of aromatic amine, benzoyl peroxide, p-toluenesulfonyl chloride, aliphatic amine and methyl isobutyl ketone peroxide;
the flame retardant is one of magnesium hydroxide, aluminum hydroxide, antimony trioxide and composite phosphorus flame retardants;
the heat conducting agent is one of boron nitride, silicon carbide, aluminum oxide and magnesium oxide;
one of coupling agent gamma-aminopropyl triethoxysilane, gamma-glycidoxypropyl trimethoxysilane and gamma- (methacryloyloxy) propyl trimethoxysilane;
the reinforcing fiber is glass fiber or carbon fiber.
2. The method for preparing the insulated heat-conducting fiber composite material for the recyclable prestressed anchor cable as claimed in claim 1, wherein the method is a hand lay-up method or a resin transfer molding method.
3. The method for preparing the insulated heat-conducting fiber composite material for the recyclable prestressed anchor cable as claimed in claim 2, wherein the hand lay-up process comprises the steps of:
1, preparing materials: taking 10-40 parts by weight of a flame retardant, 20-50 parts by weight of a heat conducting agent, 30-60 parts by weight of a reinforcing fiber, 1-10 parts by weight of a coupling agent, 100 parts by weight of a matrix resin and 5-30 parts by weight of a curing agent;
2, mixing and forming: and (2) treating the flame retardant, the heat conducting agent and the reinforcing fiber by using a coupling agent, drying, adding matrix resin and a curing agent, uniformly mixing, and manually adding the mixture into a prestressed anchor head die for curing and forming.
4. The method for preparing an insulated heat-conducting fiber composite material for a recyclable prestressed anchor cable as claimed in claim 2, wherein the resin transfer molding process comprises the steps of:
1, preparing materials, namely taking 10-40 parts by weight of a flame retardant, 20-50 parts by weight of a heat conducting agent, 30-60 parts by weight of a reinforcing fiber, 1-10 parts by weight of a coupling agent, 100 parts by weight of matrix resin and 5-30 parts by weight of a curing agent;
2, adding matrix resin into the flame retardant and the heat conducting agent, and uniformly mixing for later use;
3, laying the reinforcing fiber treated by the coupling agent in a prestressed anchor head mould, and then introducing the curing agent and the mixture obtained in the step 2 into the prestressed anchor head mould laid with the reinforcing fiber by adopting a resin transfer molding method for curing and forming.
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| CN201810304576.5A CN108727779B (en) | 2018-04-04 | 2018-04-04 | Insulating and heat-conducting fiber composite material for recyclable prestressed anchor cable and preparation method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226405A (en) * | 2011-05-25 | 2011-10-26 | 河北同成矿业科技有限公司 | Method for reinforcing working surface of loose and soft coal bed by utilizing nonmetal grouting anchor cable |
| CN103103983A (en) * | 2013-01-28 | 2013-05-15 | 江苏鼎达建筑新技术有限公司 | Recoverable combined type anchor device and construction method thereof |
| CN107057279A (en) * | 2016-12-23 | 2017-08-18 | 商丘国龙新材料有限公司 | A kind of assorted fibre reinforced resin based composites and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226405A (en) * | 2011-05-25 | 2011-10-26 | 河北同成矿业科技有限公司 | Method for reinforcing working surface of loose and soft coal bed by utilizing nonmetal grouting anchor cable |
| CN103103983A (en) * | 2013-01-28 | 2013-05-15 | 江苏鼎达建筑新技术有限公司 | Recoverable combined type anchor device and construction method thereof |
| CN107057279A (en) * | 2016-12-23 | 2017-08-18 | 商丘国龙新材料有限公司 | A kind of assorted fibre reinforced resin based composites and preparation method thereof |
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