Composite concrete release agent and preparation method thereof

Abstract

The invention discloses a composite concrete release agent and a preparation method thereof, and belongs to the technical field of concrete release agents, the concrete release agent comprises lubricating oil base oil, span-60, Tween-80, peregal O-20, dodecyl benzene sulfonic acid triethanolamine salt, xanthan gum, dimethyl silicone oil, triethanolamine and deionized water. Lubricating oil base oil and simethicone are used as a base system of a mixed emulsion, and span-60, tween-80, peregal O-20 and triethanolamine dodecylbenzene sulfonate are added to serve as main film forming substances of the release agent, so that the release agent has the environmental protection property; and the coating also has the advantages of good film-forming property, good demolding effect, no pollution to concrete members and the like. Therefore, according to the composite concrete release agent and the preparation method thereof, the technical problem that an existing release agent is prone to polluting the surface of a concrete member is solved.

Description

Technical Field

[0001] The invention relates to the technical field of concrete release agents, in particular to a composite concrete release agent and a preparation method thereof. Background Art

[0002] Concrete release agent is a substance applied to the construction formwork before pouring concrete. Its main function is to form a film between the formwork and the concrete surface to separate the two, prevent the formwork from sticking to the concrete surface, facilitate demoulding, and do not affect the finish of the concrete surface. Concrete release agent plays an important role in concrete construction. It can not only improve construction efficiency and quality, but also protect the formwork and concrete surface.

[0003] At present, there are many types of concrete release agents on the market, and different types of release agents have different characteristics and applicable scopes. With the improvement of environmental awareness and the advancement of technology, environmentally friendly and efficient release agents have gradually become the mainstream of the market. At the same time, with the continuous development of the construction industry, the performance requirements for concrete release agents are also getting higher and higher. In the future, release agents will develop in a more environmentally friendly, efficient and multifunctional direction.

[0004] Based on this, Chinese patent CN106113236A discloses a concrete component release agent, which includes 3-20 parts of phenylethanol, 20-70 parts of epoxy resin, 60-250 parts of diesel, 30-80 parts of vegetable oil, 10-50 parts of paraffin, 2-15 parts of benzoic acid, 10-25 parts of calcium sulfate, and 10-35 parts of diethanolamine. Therefore, after using the release agent, demoulding is easy, labor intensity is improved, pollution is avoided, product brightness is high, yield rate is improved, and cost is reduced.

[0005] However, the concrete component release agent disclosed in the aforementioned patent still has the technical problem of being easy to contaminate concrete components due to insufficient fluidity. Specifically, the fluidity of the release agent refers to its diffusibility and permeability when applied or sprayed, which is one of the key factors that determine the demoulding effect. A release agent with good fluidity can better cover the surface of the product, ensuring that every corner and tiny bumps can be fully lubricated, thereby reducing the amount of release agent used and reducing costs; while a release agent with poor fluidity is not easy to be evenly applied to the surface of the object, and is prone to uneven curing, bubbles or uneven bumps, and thus, it is easy to contaminate the surface of the final concrete component. Summary of the invention

[0006] Based on this, it is necessary to provide a composite concrete release agent and a preparation method thereof to address the technical problem of how to improve the flow properties of the release agent to avoid contamination of the surface of the concrete component.

[0007] A composite concrete release agent, comprising the following components in parts by weight:

[0008] Lubricating oil base oil: 10-20 parts;

[0009] Span-60: 2.1-5.5 copies;

[0010] Tween-80: 1.5-4.8 parts;

[0011] Pingpingjia O-20: 0.6-2.5 parts;

[0012] Dodecylbenzenesulfonic acid triethanolamine salt: 0.1-5 parts;

[0013] Xanthan gum: 0.001-0.004 parts;

[0014] Dimethyl silicone oil: 4.2-6.0 parts;

[0015] Triethanolamine: 0.005-0.010 parts;

[0016] Deionized water: 60-80 parts.

[0017] In a specific embodiment, it includes the following components by weight: lubricating oil base oil: 10 parts;

[0018] Span-60: 2.1 copies;

[0019] Tween-80: 1.5 parts;

[0020] Pingpingjia O-20: 0.6 parts;

[0021] Dodecylbenzenesulfonic acid triethanolamine salt: 0.1 part;

[0022] Xanthan gum: 0.001 parts;

[0023] Dimethyl silicone oil: 4.2 parts;

[0024] Triethanolamine: 0.005 parts;

[0025] Deionized water: 60 parts.

[0026] In another specific embodiment, the composition comprises the following components by weight:

[0027] Lubricating oil base oil: 20 parts;

[0028] Span-60: 5.5 parts;

[0029] Tween-80: 4.8 parts;

[0030] Pingpingjia O-20: 2.5 parts;

[0031] Dodecylbenzenesulfonic acid triethanolamine salt: 5 parts;

[0032] Xanthan gum: 0.004 parts;

[0033] Dimethyl silicone oil: 6.0 parts;

[0034] Triethanolamine: 0.010 parts;

[0035] Deionized water: 80 parts.

[0036] In another specific embodiment, the composition comprises the following components by weight:

[0037] Lubricating oil base oil: 15 parts;

[0038] Span-60: 4.2 copies;

[0039] Tween-80: 3.51 parts;

[0040] Pingpingjia O-20: 1.7 parts;

[0041] Dodecylbenzenesulfonic acid triethanolamine salt: 4.4 parts;

[0042] Xanthan gum: 0.002 parts;

[0043] Dimethyl silicone oil: 5.5 parts;

[0044] Triethanolamine: 0.006 parts;

[0045] Deionized water: 70 parts.

[0046] In another specific embodiment, the composition comprises the following components by weight:

[0047] Lubricating oil base oil: 18 parts;

[0048] Span-60: 5.2 copies;

[0049] Tween-80: 3.76 parts;

[0050] Pingpingjia O-20: 1.4 parts;

[0051] Dodecylbenzenesulfonic acid triethanolamine salt: 2 parts;

[0052] Xanthan gum: 0.002 parts;

[0053] Dimethyl silicone oil: 5.0 parts;

[0054] Triethanolamine: 0.008 parts;

[0055] Deionized water: 70 parts.

[0056] In another specific embodiment, the composition comprises the following components by weight:

[0057] Lubricating oil base oil: 18 parts;

[0058] Span-60: 4.95 copies;

[0059] Tween-80: 4.51 parts;

[0060] Pingpingjia O-20: 0.80 parts;

[0061] Dodecylbenzenesulfonic acid triethanolamine salt: 4 parts;

[0062] Xanthan gum: 0.003 parts;

[0063] Dimethyl silicone oil: 5.5 parts;

[0064] Triethanolamine: 0.008 parts;

[0065] Deionized water: 80 parts

[0066] A method for preparing the aforementioned composite concrete release agent comprises the following steps:

[0067] S1: First, prepare the materials according to the formula: lubricating oil base oil, Span-60, Tween-80, Peregal O-20, triethanolamine dodecylbenzenesulfonate, xanthan gum, dimethyl silicone oil, triethanolamine and deionized water;

[0068] S2: Add the prepared Span-60, Tween-80, Peregal O-20 and triethanolamine dodecylbenzenesulfonate into the reactor respectively, and raise the temperature in the reactor to 70° C. At the same time, start stirring at a rate of 800-1000 r / min in the reactor to fully mix the components;

[0069] S3: While stirring in step S2, maintain the stirring state of 800-1000 r / min and add 30% of the prepared dimethyl silicone oil, and continue stirring;

[0070] S4: heating the deionized water to 70°C and increasing the stirring speed to 1000-1200r / min; under high-speed dispersing stirring, first adding 15% of the pre-prepared heated deionized water into the reactor, and then slowly adding the pre-prepared lubricating base oil, xanthan gum, triethanolamine and 50% of the pre-prepared heated deionized water into the reactor; thereafter, maintaining stirring for 30 minutes;

[0071] S5: After increasing the dispersion speed to 1200-1500r / min, slowly add the remaining dimethyl silicone oil into the system;

[0072] S6: Increase the dispersion speed to 1500r / min, continue stirring for 20 minutes, quickly add all the remaining heated deionized water, and reduce the speed to 1200r / min, continue stirring for 60 minutes and then discharge.

[0073] In summary, the composite concrete release agent and its preparation method of the present invention use lubricating oil base oil as the basic system of the release agent emulsion, and respectively add Span-60, Tween-80, triethanolamine salt of dodecylbenzenesulfonic acid, peregal O-20 and dimethyl silicone oil as the main film-forming substances of the release agent, so that the release agent has the advantages of good film-forming property and good demoulding effect. At the same time, because the emulsion system of the lubricating oil base oil can make the concrete surface of the concrete component after demoulding smooth and reduce the honeycomb bubbles on its surface; so that the surface of the concrete component product will not have the defect of residual impregnation marks, so as not to affect the yield rate of secondary processing such as subsequent decoration of secondary concrete components. In addition, xanthan gum is used as a stabilizer of the emulsification system, dimethyl silicone oil is also used as a defoamer, and triethanolamine is used as a rust inhibitor. Moreover, calcium formate can also be added to balance the negative effect of the oil release agent on cement hydration, so that the release agent proposed by the present invention can be adapted to the concrete component forming process of the steel formwork. Therefore, the composite concrete release agent and the preparation method thereof of the present invention solve the technical problem of how to improve the flow performance of the release agent. DETAILED DESCRIPTION

[0074] In order to make the above-mentioned purpose, features and advantages of the present invention more obvious and easy to understand, the specific implementation mode of the present invention is described in detail below in conjunction with embodiments. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0075] The present invention discloses a composite concrete release agent, which comprises the following components in parts by weight:

[0076] Lubricating oil base oil: 10-20 parts;

[0077] Span-60: 2.1-5.5 copies;

[0078] Tween-80: 1.5-4.8 parts;

[0079] Pingpingjia O-20: 0.6-2.5 parts;

[0080] Dodecylbenzenesulfonic acid triethanolamine salt: 0.1-5 parts;

[0081] Xanthan gum: 0.001-0.004 parts;

[0082] Dimethyl silicone oil: 4.2-6.0 parts;

[0083] Triethanolamine: 0.005-0.010 parts;

[0084] Deionized water: 60-80 parts.

[0085] Furthermore, a method for preparing the aforementioned concrete release agent specifically comprises the following steps:

[0086] S1: First, prepare the materials according to the formula: lubricating base oil: 10-20 parts; Span-60: 2.1-5.5 parts; Tween-80: 1.5-4.8 parts; Peregal O-20: 0.6-2.5 parts; triethanolamine dodecylbenzenesulfonate: 0.1-5 parts; xanthan gum: 0.001-0.004 parts; dimethyl silicone oil: 4.2-6.0 parts; triethanolamine: 0.005-0.010 parts; deionized water: 60-80 parts;

[0087] S2: Add the prepared Span-60, Tween-80, Peregal O-20 and triethanolamine dodecylbenzenesulfonate into the reactor respectively, and raise the temperature in the reactor to 70° C. At the same time, start stirring at a rate of 800-1000 r / min in the reactor to fully mix the components;

[0088] S3: While stirring in step S2, maintain the stirring state of 800-1000 r / min and add 30% of the prepared dimethyl silicone oil, and continue stirring;

[0089] S4: heating the deionized water to 70°C and increasing the stirring speed to 1000-1200r / min; under high-speed dispersing stirring, first adding 15% of the pre-prepared heated deionized water into the reactor, and then slowly adding the pre-prepared lubricating base oil, xanthan gum, triethanolamine and 50% of the pre-prepared heated deionized water into the reactor; thereafter, maintaining stirring for 30 minutes;

[0090] S5: After increasing the dispersion speed to 1200-1500r / min, slowly add the remaining dimethyl silicone oil into the system;

[0091] S6: Increase the dispersion speed to 1500r / min, continue stirring for 20 minutes, quickly add all the remaining heated deionized water, and reduce the speed to 1200r / min, continue stirring for 60 minutes and then discharge.

[0092] Specifically, in a specific embodiment of a composite concrete release agent of the present invention, several embodiments of the composite concrete release agent are respectively:

[0093] Embodiment 1:

[0094] Lubricating oil base oil: 10 parts;

[0095] Span-60: 2.1 copies;

[0096] Tween-80: 1.5 parts;

[0097] Pingpingjia O-20: 0.6 parts;

[0098] Dodecylbenzenesulfonic acid triethanolamine salt: 0.1 part;

[0099] Xanthan gum: 0.001 parts;

[0100] Dimethyl silicone oil: 4.2 parts;

[0101] Triethanolamine: 0.005 parts;

[0102] Deionized water: 60 parts.

[0103] Embodiment 2:

[0104] Lubricating oil base oil: 20 parts;

[0105] Span-60: 5.5 parts;

[0106] Tween-80: 4.8 parts;

[0107] Pingpingjia O-20: 2.5 parts;

[0108] Dodecylbenzenesulfonic acid triethanolamine salt: 5 parts; Xanthan gum: 0.004 parts;

[0109] Dimethyl silicone oil: 6.0 parts;

[0110] Triethanolamine: 0.010 parts;

[0111] Deionized water: 80 parts.

[0112] Embodiment three:

[0113] Lubricating oil base oil: 15 parts;

[0114] Span-60: 4.2 copies;

[0115] Tween-80: 3.51 parts;

[0116] Pingpingjia O-20: 1.7 parts;

[0117] Dodecylbenzenesulfonic acid triethanolamine salt: 4.4 parts; Xanthan gum: 0.002 parts;

[0118] Dimethyl silicone oil: 5.5 parts;

[0119] Triethanolamine: 0.006 parts;

[0120] Deionized water: 70 parts.

[0121] Embodiment 4:

[0122] Lubricating oil base oil: 18 parts;

[0123] Span-60: 5.2 copies;

[0124] Tween-80: 3.76 parts;

[0125] Pingpingjia O-20: 1.4 parts;

[0126] Dodecylbenzenesulfonic acid triethanolamine salt: 2 parts; Xanthan gum: 0.002 parts;

[0127] Dimethyl silicone oil: 5.0 parts;

[0128] Triethanolamine: 0.008 parts;

[0129] Deionized water: 70 parts;

[0130] Embodiment five:

[0131] Lubricating oil base oil: 18 parts;

[0132] Span-60: 4.95 copies;

[0133] Tween-80: 4.51 parts;

[0134] Pingpingjia O-20: 0.80 parts;

[0135] Dodecylbenzenesulfonic acid triethanolamine salt: 4 parts;

[0136] Xanthan gum: 0.003 parts;

[0137] Dimethyl silicone oil: 5.5 parts;

[0138] Triethanolamine: 0.008 parts;

[0139] Deionized water: 80 parts.

[0140] Specifically, emulsifier is an important factor in preparing emulsion and determines the state of emulsion. A single type of emulsifier has poor emulsification effect, the formed interfacial film is easy to break, and the obtained emulsion has poor stability. However, the synergistic effect of a composite emulsifier formed by compounding multiple emulsifiers during the emulsification process can increase the mechanical strength of the interfacial film, reduce the critical micelle concentration, improve the emulsification effect, and obtain an emulsion with good stability.

[0141] More specifically, compound emulsifiers formed by two or more emulsifiers often have different carbon chain lengths and morphological structures. The mixed emulsifiers can be better dispersed at the oil-water interface, fully occupy the oil-water interface, and the emulsion is more stable. In order to make the compound emulsifier have a good affinity for both water and oil, an emulsifier with a smaller LB value and an emulsifier with a larger LB value are often selected to match, so that the properties of different emulsifiers gradually transition from lipophilic to hydrophilic, thereby enhancing the emulsification effect.

[0142] Moreover, in the selection of emulsifiers, non-ionic emulsifiers with low requirements on the use environment should be given priority. Non-ionic emulsifiers can dissolve and function well in water and solvents, have high stability, can be used in combination with ionic emulsifiers, and are not easily affected by strong acid and alkali environments. In order to adapt to the quality of tap water in the process of industrial expansion of production, the factors affecting the expansion of production can be reduced. At the same time, auxiliary agents are selected to adjust the HLB value of the emulsifier, enhance the emulsification effect of the emulsifier, increase the fluidity of the interfacial film, and help form smaller emulsion particles.

[0143] Therefore, in the technical solution proposed by the present invention, lubricating oil base oil and dimethyl silicone oil are used as the basic system of the release agent, and Span-60, Tween-80 and Peregal O-20 are used as surfactants to improve the stability of the emulsifier; thereafter, triethanolamine salt of dodecylbenzenesulfonate is used as an auxiliary agent so that the system of the composite emulsifier can be quickly dispersed to form a stable homogeneous. The present invention is also based on the principles of HLB and uniform design, selects a better composite non-ionic surfactant and auxiliary agent and optimizes the ratio thereof, thereby preparing a composite non-ionic surfactant required for emulsified silicone oil; and then, a composite concrete release agent product can be prepared. Specifically, stability is an important indicator of lubricating oil base oil emulsion release agent. After the emulsion release agent with poor stability is applied to the template, the film thickness will be uneven, which will seriously affect the demoulding effect and cause surface defects of the concrete specimen. The demoulding performance of the release agent is the most important indicator, which can be characterized by the force applied when demolding, the amount of concrete adhesion, and the appearance. Therefore, the key to the preparation of lubricating base oil emulsion lies in the selection of emulsifiers. Each emulsifier has a different hydrophilic-lipophilic balance value, that is, HLB value. If a stable emulsion is to be prepared, the HLB value of the selected emulsifier or emulsifiers should be as equal or close to that of the emulsified substance as possible to achieve the best effect.

[0144] Further, the lubricating base oil used in the composite concrete release agent of the present invention is the main component of the lubricating oil, accounting for about 85%-90% of the lubricating oil. When applied to the concrete release agent, it is necessary to first emulsify it according to the preset steps to obtain a stable emulsion system, and then use the system as the main body, and form a semi-emulsified mixed system by matching the composite emulsifier, and finally use it as the main film-forming substance of the release agent, so that the release agent has good film-forming properties and good demoulding effects. In the aforementioned composite emulsifier system, Span-60, Tween-80, Peregal O-20, triethanolamine salt of dodecylbenzenesulfonic acid and dimethyl silicone oil are mutually dispersed in the solvent system of deionized water to form a semi-emulsion system, and xanthan gum is used as a stabilizer of the semi-emulsified system. At the same time, the dimethyl silicone oil can also have the function of a defoamer. Finally, triethanolamine is used as a rust inhibitor to make it suitable for the concrete component forming process of the steel template.

[0145] Further, according to the method of the concrete release agent proposed by the present invention, experiments were conducted using the five embodiments respectively. The experiments were measured according to the relevant standards of the national standard GB / T11543-2008. The stability of the obtained different concrete release agents and the selection relationship of the compound emulsifier were measured as shown in Table 1:

[0146] Table 1: Stability of concrete release agents obtained with different emulsifier components

[0147] Serial number Stability of concrete release agent Embodiment 1 Level 3, very little stratification, not obvious Embodiment 2 Level 3, very little stratification, not obvious Embodiment 3 Level 2, relatively stable Embodiment 4 Level 2, relatively stable Embodiment 5 Level 2, relatively stable

[0148] As can be seen from the results of Table 1, when selecting Span-60, Tween-80, dodecylbenzenesulfonic acid triethanolamine salt and Peregal these several surfactants to be composited, emulsifying effect is all better, and the stability of emulsion is also higher. This is because several surfactants are composited, and the surface tension of emulsion can be reduced, thereby stabilizing the emulsion. When emulsifier is composited, these surfactants are ionized in water to produce electric charge, so that tiny oil droplets in the emulsion have the same electric charge, and by electrostatic action, the cohesion of droplets is prevented, which is conducive to emulsion stabilization. In addition, there is a stronger synergistic effect between Tween-80 and dodecylbenzenesulfonic acid triethanolamine salt, and they can also form stable film on the surface of emulsion droplets, thereby promoting the stability of emulsion.

[0149] Furthermore, the above-mentioned Examples 1 to 5 and a commercially available common mineral oil release agent were used as Comparative Example 1, and each example was subjected to a demoulding test on C30 common concrete according to the test method described in "Release Agent for Concrete Products" (JC / T949-2005). The detailed experimental results are shown in Table 1 below.

[0150] Table 2: Release agent performance test results

[0151]

[0152] Based on the release agent performance test results in Table 2, a horizontal comparison of the experimental results of Examples 1 to 5 with Comparative Example 1 shows that the release agent product prepared using the formula and preparation method of the composite concrete release agent of the present invention has significantly better release performance than the ordinary concrete release agent on the market.

[0153] Furthermore, the oil-containing release agent provides good reliability for the apparent quality of concrete, but the oil will reduce the degree of cement hydration and delay the hydration of C3A, thereby increasing the setting time and reducing the total amount of hydration products. Since the oil has a certain viscosity and affects the porosity of hardened concrete, it has a negative impact on the mechanical properties of concrete. Therefore, the present invention can also introduce calcium formate as an early strength agent into the composition of the concrete release agent. When the input amount reaches 1%, the negative impact of the release agent on cement hydration can be balanced. The optimal input amount is 3%, and the maximum input amount does not exceed 9%.

[0154] In summary, the composite concrete release agent and its preparation method of the present invention use lubricating oil base oil as the basic system of the release agent emulsion, and respectively add Span-60, Tween-80, triethanolamine salt of dodecylbenzenesulfonic acid, peregal O-20 and dimethyl silicone oil as the main film-forming substances of the release agent, so that the release agent has the advantages of good film-forming property and good demoulding effect. At the same time, because the emulsion system of the lubricating oil base oil can make the concrete surface of the concrete component after demoulding smooth and reduce the honeycomb bubbles on its surface; so that the surface of the concrete component product will not have the defect of residual impregnation marks, so as not to affect the yield rate of secondary processing such as subsequent decoration of secondary concrete components. In addition, xanthan gum is used as a stabilizer of the emulsification system, dimethyl silicone oil is also used as a defoamer, and triethanolamine is used as a rust inhibitor. Moreover, calcium formate can also be added to balance the negative effect of the oil release agent on cement hydration, so that the release agent proposed by the present invention can be adapted to the concrete component forming process of the steel formwork. Therefore, the composite concrete release agent and the preparation method thereof of the present invention solve the technical problem of how to improve the flow performance of the release agent.

[0155] The technical features of the above-described embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. The above-described embodiments only express several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, several variations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A composite concrete release agent, characterized in that: By weight, it includes the following components: Lubricating oil base oil: 10-20 parts; Span-60: 2.1-5.5 copies; Tween-80: 1.5-4.8 parts; Pingpingjia O-20: 0.6-2.5 parts; Dodecylbenzenesulfonic acid triethanolamine salt: 0.1-5 parts; Xanthan gum: 0.001-0.004 parts; Dimethyl silicone oil: 4.2-6.0 parts; Triethanolamine: 0.005-0.010 parts; Deionized water: 60-80 parts.

2. A composite concrete release agent according to claim 1, characterized in that: By weight, it includes the following components: Lubricating oil base oil: 10 parts; Span-60: 2.1 copies; Tween-80: 1.5 parts; Pingpingjia O-20: 0.6 parts; Dodecylbenzenesulfonic acid triethanolamine salt: 0.1 part; Xanthan gum: 0.001 parts; Dimethyl silicone oil: 4.2 parts; Triethanolamine: 0.005 parts; Deionized water: 60 parts.

3. A composite concrete release agent according to claim 1, characterized in that: By weight, it includes the following components: Lubricating oil base oil: 20 parts; Span-60: 5.5 parts; Tween-80: 4.8 parts; Pingpingjia O-20: 2.5 parts; Dodecylbenzenesulfonic acid triethanolamine salt: 5 parts; Xanthan gum: 0.004 parts; Dimethyl silicone oil: 6.0 parts; Triethanolamine: 0.010 parts; Deionized water: 80 parts.

4. A composite concrete release agent according to claim 1, characterized in that: By weight, it includes the following components: Lubricating oil base oil: 15 parts; Span-60: 4.2 copies; Tween-80: 3.51 parts; Pingpingjia O-20: 1.7 parts; Dodecylbenzenesulfonic acid triethanolamine salt: 4.4 parts; Xanthan gum: 0.002 parts; Dimethyl silicone oil: 5.5 parts; Triethanolamine: 0.006 parts; Deionized water: 70 parts.

5. A composite concrete release agent according to claim 1, characterized in that: By weight, it includes the following components: Lubricating oil base oil: 18 parts; Span-60: 5.2 copies; Tween-80: 3.76 parts; Pingpingjia O-20: 1.4 parts; Dodecylbenzenesulfonic acid triethanolamine salt: 2 parts; Xanthan gum: 0.002 parts; Dimethyl silicone oil: 5.0 parts; Triethanolamine: 0.008 parts; Deionized water: 70 parts.

6. A composite concrete release agent according to claim 1, characterized in that: By weight, it includes the following components: Lubricating oil base oil: 18 parts; Span-60: 4.95 copies; Tween-80: 4.51 parts; Pingpingjia O-20: 0.80 parts; Dodecylbenzenesulfonic acid triethanolamine salt: 4 parts; Xanthan gum: 0.003 parts; Dimethyl silicone oil: 5.5 parts; Triethanolamine: 0.008 parts; Deionized water: 80 parts 7. A method for preparing a composite concrete release agent as claimed in any one of claims 1 to 6, characterized in that: It includes the following steps: S1: First, prepare the materials according to the formula: lubricating oil base oil, Span-60, Tween-80, Peregal O-20, triethanolamine dodecylbenzenesulfonate, xanthan gum, dimethyl silicone oil, triethanolamine and deionized water; S2: Add the prepared Span-60, Tween-80, Peregal O-20 and triethanolamine dodecylbenzenesulfonate into the reactor respectively, and raise the temperature in the reactor to 70° C. At the same time, start stirring at a rate of 800-1000 r / min in the reactor to fully mix the components; S3: While stirring according to step S2, maintain the stirring state of 800-1000 r / min and add 30% of the prepared dimethyl silicone oil, and continue stirring; S4: heat the deionized water to 70°C and increase the stirring speed to 1000-1200r / min; under high-speed dispersing stirring, first add 15% of the pre-prepared heated deionized water into the reactor, and then slowly add the pre-prepared lubricating base oil, xanthan gum, triethanolamine and 50% of the pre-prepared heated deionized water into the reactor; thereafter, maintain stirring for 30 minutes; S5: After increasing the dispersion speed to 1200-1500r / min, slowly add the remaining dimethyl silicone oil into the system; S6: Increase the dispersion speed to 1500r / min, continue stirring for 20 minutes, quickly add all the remaining heated deionized water, and reduce the speed to 1200r / min, continue stirring for 60 minutes and then discharge.

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