阅读说明：本技术 基于动态交联体系的自润滑防结冰材料及其制备方法 (Self-lubricating anti-icing material based on dynamic cross-linking system and preparation method thereof ) 是由 温世峰 陈光孟 冯涛 岳珠峰 于 2019-10-22 设计创作，主要内容包括：本发明涉及防结冰技术领域,尤其涉及一种基于动态交联体系的自润滑防结冰材料和基于动态交联体系的自润滑防结冰材料的制备方法。该基于动态交联体系的自润滑防结冰材料可以包括主料、有机溶剂和防冰物质；主料包括双氨基封端的聚二甲基硅氧烷、二环己基甲烷二异氰酸酯和间苯二甲醛；双氨基封端的聚二甲基硅氧烷的分子数量是二环己基甲烷二异氰酸酯的分子数量和间苯二甲醛的分子数量之和；双氨基封端的聚二甲基硅氧烷与有机溶剂的质量比大于等于0.2且小于等于0.25；防冰物质的质量为主料质量的20％～50％。相较于现有技术,本发明基于动态交联体系的自润滑防结冰材料稳定新较好、且使用寿命较长。(The invention relates to the technical field of anti-icing, in particular to a self-lubricating anti-icing material based on a dynamic crosslinking system and a preparation method of the self-lubricating anti-icing material based on the dynamic crosslinking system. The self-lubricating anti-icing material based on the dynamic crosslinking system can comprise a main material, an organic solvent and an anti-icing substance; the main materials comprise dimethylamino terminated polydimethylsiloxane, dicyclohexyl methane diisocyanate and m-phthalaldehyde; the molecular number of the diamino terminated polydimethylsiloxane is the sum of the molecular number of dicyclohexylmethane diisocyanate and the molecular number of m-phthalaldehyde; the mass ratio of the diamino-terminated polydimethylsiloxane to the organic solvent is more than or equal to 0.2 and less than or equal to 0.25; the mass of the anti-icing substance is 20-50% of the mass of the main material. Compared with the prior art, the self-lubricating anti-icing material based on the dynamic crosslinking system is good in stability and durability.)

1. A self-lubricating anti-icing material based on a dynamic cross-linking system is characterized by comprising a main material, an organic solvent and an anti-icing substance;

the main material comprises diamino terminated polydimethylsiloxane, dicyclohexyl methane diisocyanate and m-phthalaldehyde; the molecular number of the diamino terminated polydimethylsiloxane is the sum of the molecular number of dicyclohexylmethane diisocyanate and the molecular number of m-phthalaldehyde;

the mass ratio of the diamino-terminated polydimethylsiloxane to the organic solvent is more than or equal to 0.2 and less than or equal to 0.25;

the mass of the anti-icing substance is 20-50% of the mass of the main material.

2. Self-lubricating ice-protective material based on a dynamic cross-linking system according to claim 1, characterised in that the molar mass of the bis-amino-terminated polydimethylsiloxane is 860 g/mol.

3. The self-lubricating ice-protective material based on a dynamic cross-linking system according to claim 1, wherein the organic solvent comprises tetrahydrofuran or chloroform.

4. Self-lubricating ice-protection material based on a dynamic cross-linking system according to claim 1, characterized in that the ice-protection substance comprises one or more of dimethicone, polyethylene glycol, polyether polyol and liquid paraffin.

5. The self-lubricating anti-icing material based on the dynamic crosslinking system comprises a main material, an organic solvent and an anti-icing substance, and is characterized in that the main material comprises diamino terminated polydimethylsiloxane, dicyclohexyl methane diisocyanate and m-phthalaldehyde, and the mass ratio of the diamino terminated polydimethylsiloxane to the organic solvent is more than or equal to 0.2 and less than or equal to 0.25; the molecular number of the diamino terminated polydimethylsiloxane is the sum of the molecular number of dicyclohexylmethane diisocyanate and the molecular number of m-phthalaldehyde; the mass of the anti-icing substance is 20-50% of that of the main material, and the preparation method comprises the following steps:

mixing the diamino-terminated polydimethylsiloxane in the main material with an organic solvent and dicyclohexylmethane diisocyanate, and stirring for the first time to obtain a first mixture;

adding m-phthalaldehyde into the first mixture, and stirring for the second time to obtain a second mixture;

adding the anti-icing substance into the second mixture, and stirring for the third time to obtain a target mixture;

and pouring the target mixture into a mold for cooling to obtain the self-lubricating anti-icing material based on the dynamic crosslinking system.

6. The method for preparing the self-lubricating anti-icing material based on the dynamic crosslinking system according to claim 5, wherein the diamino terminated polydimethylsiloxane in the main material is mixed with the organic solvent and stirred for the first time to obtain a first mixture, and the first mixture comprises:

the bisamino-terminated polydimethylsiloxane with the molar mass of 860g/mol is mixed with the organic solvent and dicyclohexylmethane diisocyanate and stirred for the first time to obtain a first mixture.

7. The method for preparing self-lubricating anti-icing material based on a dynamic cross-linking system according to claim 6, characterised in that the organic solvent comprises tetrahydrofuran or trichloromethane.

8. The method for preparing the self-lubricating anti-icing material based on the dynamic cross-linking system according to claim 5, wherein the stirring time of the first stirring and the second stirring is 6 hours, the stirring environment temperature is 60 ℃, and nitrogen protection is provided.

9. The method for preparing self-lubricating anti-icing material based on a dynamic cross-linking system according to claim 5, characterized in that the anti-icing substance is added to the second mixture for a third stirring comprising:

and stirring the second mixture and one or more of simethicone, polyethylene glycol, polyether polyol and liquid paraffin for the third time to obtain the self-lubricating anti-icing material based on the dynamic crosslinking system.

10. The method for preparing the self-lubricating anti-icing material based on the dynamic crosslinking system according to the claim 5, wherein the self-lubricating anti-icing material based on the dynamic crosslinking system is obtained by pouring the target mixture into a mold for cooling, and comprises the following steps:

and pouring the target mixture into a polytetrafluoroethylene mold to be cooled for 72 hours to obtain the self-lubricating anti-icing material based on the dynamic crosslinking system.

Technical Field

The invention relates to the technical field of anti-icing, in particular to a self-lubricating anti-icing material based on a dynamic crosslinking system and a preparation method of the self-lubricating anti-icing material based on the dynamic crosslinking system.

Background

The ice coating phenomenon of aviation, communication, electric power and transportation equipment brings inconvenience to production and life of people and even causes great economic loss. So that the application of the anti-icing material becomes widespread.

However, the anti-icing material in the prior art has poor stability and short service life.

Therefore, there is a need for a new self-lubricating anti-icing material based on a dynamic crosslinking system and a method for preparing the same

The above information disclosed in this background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not constitute prior art that is already known to a person of ordinary skill in the art.

Disclosure of Invention

The invention aims to overcome the defects of poor stability and short service life of the anti-icing material in the prior art, and provides a self-lubricating anti-icing material based on a dynamic crosslinking system and a preparation method of the self-lubricating anti-icing material based on the dynamic crosslinking system, which are good in stability and long in service life.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

According to one aspect of the invention, the self-lubricating anti-icing material based on the dynamic crosslinking system comprises a main material, an organic solvent and an anti-icing substance;

the main material comprises diamino terminated polydimethylsiloxane, dicyclohexyl methane diisocyanate and m-phthalaldehyde; the molecular number of the diamino terminated polydimethylsiloxane is the sum of the molecular number of dicyclohexylmethane diisocyanate and the molecular number of m-phthalaldehyde;

the mass ratio of the diamino-terminated polydimethylsiloxane to the organic solvent is more than or equal to 0.2 and less than or equal to 0.25;

the mass of the anti-icing substance is 20-50% of the mass of the main material.

In one exemplary embodiment of the present disclosure, the diamino terminated polydimethylsiloxane has a molar mass of 860 g/mol.

In an exemplary embodiment of the present disclosure, the organic solvent includes tetrahydrofuran or chloroform.

In an exemplary embodiment of the present disclosure, the anti-icing material includes one or more of dimethicone, polyethylene glycol, polyether polyol, and liquid paraffin.

According to one aspect of the present disclosure, a preparation method of a self-lubricating anti-icing material based on a dynamic crosslinking system is provided, the self-lubricating anti-icing material based on the dynamic crosslinking system comprises a main material, an organic solvent and an anti-icing substance, the main material comprises diamino terminated polydimethylsiloxane, dicyclohexyl methane diisocyanate and m-phthalaldehyde, and the mass ratio of the diamino terminated polydimethylsiloxane to the organic solvent is greater than or equal to 0.2 and less than or equal to 0.25; the molecular number of the diamino terminated polydimethylsiloxane is the sum of the molecular number of dicyclohexylmethane diisocyanate and the molecular number of m-phthalaldehyde; the mass of the anti-icing substance is 20-50% of that of the main material, and the preparation method comprises the following steps:

mixing the diamino-terminated polydimethylsiloxane in the main material with an organic solvent and dicyclohexylmethane diisocyanate, and stirring for the first time to obtain a first mixture;

adding m-phthalaldehyde into the first mixture, and stirring for the second time to obtain a second mixture;

adding the anti-icing substance into the second mixture, and stirring for the third time to obtain a target mixture;

and pouring the target mixture into a mold for cooling to obtain the self-lubricating anti-icing material based on the dynamic crosslinking system.

In an exemplary embodiment of the present disclosure, the bis-amino-terminated polydimethylsiloxane in the main material is mixed with the organic solvent and stirred for the first time to obtain a first mixture, including:

the bisamino-terminated polydimethylsiloxane with the molar mass of 860g/mol and the organic solvent are mixed and stirred for the first time to obtain a first mixture.

In an exemplary embodiment of the present disclosure, the organic solvent includes tetrahydrofuran or chloroform.

In an exemplary embodiment of the present disclosure, the stirring time of the first stirring and the second stirring is 6 hours, the stirring environment temperature is 60 degrees celsius, and the nitrogen protection is provided.

In an exemplary embodiment of the present disclosure, adding the anti-icing substance to the second mixture for a third stirring includes:

and stirring the second mixture and one or more of simethicone, polyethylene glycol, polyether polyol and liquid paraffin for the third time to obtain the self-lubricating anti-icing material based on the dynamic crosslinking system.

In an exemplary embodiment of the present disclosure, the self-lubricating anti-icing material based on a dynamic cross-linking system is obtained by pouring the target mixture into a mold for cooling, and comprises:

and pouring the target mixture into a polytetrafluoroethylene mold to be cooled for 72 hours to obtain the self-lubricating anti-icing material based on the dynamic crosslinking system.

According to the technical scheme, the invention has at least one of the following advantages and positive effects:

the invention relates to a self-lubricating anti-icing material based on a dynamic crosslinking system, which comprises main materials of dimethylamino-terminated polydimethylsiloxane, dicyclohexylmethane diisocyanate and m-phthalaldehyde; the molecular number of the diamino terminated polydimethylsiloxane is the sum of the molecular number of dicyclohexylmethane diisocyanate and the molecular number of m-phthalaldehyde; the mass ratio of the diamino-terminated polydimethylsiloxane to the organic solvent is more than or equal to 0.2 and less than or equal to 0.25; the mass of the anti-icing substance is 20-50% of the mass of the main material. Compared with the prior art, the self-repairing elastomer material with the dynamic cross-linking structure is formed by adopting the main material and the organic solvent, then the anti-icing substance is added into the material, when the solvent in the system volatilizes, the liquid anti-icing substance can be separated from the cross-linking system, and thus the liquid substance can be uniformly dispersed in the material system in a small liquid drop form. Under the combined action of liquid surface energy and dynamic reconstruction of the material, the liquid can be uniformly spread on the surface of the material to play a role in anti-icing. When the surface substance is lost, the internal liquid can be continuously secreted and timely supplemented, thereby achieving the long-acting anti-icing effect.

Drawings

The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

FIG. 1 is a flow chart of a preparation method of the self-lubricating anti-icing material based on a dynamic crosslinking system.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.

The ice coating phenomenon of aviation, communication, electric power and transportation equipment brings inconvenience to production and life of people and even causes great economic loss. The ice coating prevention technology has attracted extensive attention of global researchers, and some countries with a lot of ice disasters have established special research institutions to carry out a great deal of scientific research on the ice coating principle. Most of the traditional deicing methods are based on the ideas of deicing and deicing, the common methods mainly comprise mechanical deicing, thermal deicing and the like, and the method is at the cost of large energy consumption and has poor deicing effect. The ice accretion on the surface of the coating can not be eliminated in time, and can bring disastrous results to the flight safety of airplanes and the like. Therefore, the development of a novel anti-icing coating with low energy consumption and good deicing effect becomes the research focus in the field.

The novel anti-icing coating achieves the effect of preventing icing on the surface mainly through three aspects of drainage, anti-icing and ice thinning. First, the hydrophobic nature of the coating minimizes the amount of water that collects on the surface of the coating, thereby reducing the amount of ice that forms. Secondly, the anti-icing performance means that the icing time of the supercooled water on the surface of the coating is prolonged as much as possible, and the supercooled water has enough time to be separated from the surface of the coating under the action of wind power, gravity, centrifugal force and the like before being solidified, so that the anti-icing effect is achieved. The ice-thinning is to reduce the binding force between the ice layer and the coating, so as to achieve the purpose of easy deicing.

Inspired by lotus leaves, the application of the super-hydrophobic surface with excellent hydrophobic property in the aspect of anti-icing is widely researched. Due to the excellent hydrophobicity, the aggregation of surface supercooled water is greatly reduced. Meanwhile, due to the air cushion effect between the water drops and the coating, the icing process of the supercooled water is effectively slowed down. However, the anti-icing performance of the superhydrophobic coating is significantly degraded under a high humidity environment, and in addition, the adhesion of the ice layer on the coating surface may be increased due to a mechanical interlocking effect between the ice layer and the superhydrophobic surface. In addition, since the microstructure thereof is easily broken, the mechanical durability thereof is poor. Therefore, the application of the super-hydrophobic surface to the ice prevention has many problems to be solved. The appearance of the liquid lubricating surface provides a new direction for the development of the anti-icing coating, and the surface liquid lubricating layer greatly reduces the binding force between the ice layer and the coating. Therefore, it has stable anti-icing performance in both high humidity and ultra-low temperature environments. But with the loss of the surface lubricant layer, the coating loses anti-icing properties. How to prolong the service life of the anti-icing lubricant becomes the key of the application of the body fluid lubrication surface in the anti-icing field.

Therefore, the invention firstly provides a self-lubricating anti-icing material based on a dynamic crosslinking system, which can comprise a main material, an organic solvent and an anti-icing substance; the main materials comprise dimethylamino terminated polydimethylsiloxane, dicyclohexyl methane diisocyanate and m-phthalaldehyde; the molecular number of the diamino terminated polydimethylsiloxane is the sum of the molecular number of dicyclohexylmethane diisocyanate and the molecular number of m-phthalaldehyde; the mass ratio of the diamino-terminated polydimethylsiloxane to the organic solvent is more than or equal to 0.2 and less than or equal to 0.25; the mass of the anti-icing substance is 20-50% of the mass of the main material.

Compared with the prior art, the self-repairing elastomer material with the dynamic cross-linking structure is formed by adopting the main material and the organic solvent, then the anti-icing substance is added into the material, when the solvent in the system volatilizes, the liquid anti-icing substance can be separated from the cross-linking system, and thus the liquid substance can be uniformly dispersed in the material system in a small liquid drop form. Under the combined action of liquid surface energy and dynamic reconstruction of the material, the liquid can be uniformly spread on the surface of the material to play a role in anti-icing. When the surface substance is lost, the internal liquid can be continuously secreted and timely supplemented, thereby achieving the long-acting anti-icing effect.

The main materials comprise dimethylamino terminated polydimethylsiloxane, dicyclohexyl methane diisocyanate and m-phthalaldehyde; the molecular number of the diamino terminated polydimethylsiloxane is the sum of the molecular number of dicyclohexylmethane diisocyanate and the molecular number of m-phthalaldehyde; for example, a bisamino-terminated polydimethylsiloxane having x mol, dicyclohexylmethane diisocyanate having y mol, and m-phthalaldehyde having z mol, in which case x ═ y + z, where x, y, z are all positive numbers. For example, x is 2, y is 1, z is 1; x is 0.0232, y is 0.0116, and z is 0.0116; x is 3, y is 1, z is 2; x is 3, y is 2, z is 1, etc. The molecular number of the bisamino-terminated polydimethylsiloxane is not particularly limited, again, as long as it is the sum of the molecular number of dicyclohexylmethane diisocyanate and the molecular number of isophthalaldehyde.

The molar mass of the bisamino-terminated polydimethylsiloxane may be 860 g/mol.

The organic solvent is used for diluting the diamino terminated polydimethylsiloxane, and can be tetrahydrofuran or trichloromethane.

The anti-icing substance can also be one or more of simethicone, polyethylene glycol, polyether polyol and liquid paraffin.

The invention further provides a preparation method of the self-lubricating anti-icing material based on the dynamic crosslinking system, which comprises a main material, an organic solvent and an anti-icing substance, and is characterized in that the main material comprises diamino terminated polydimethylsiloxane, dicyclohexylmethane diisocyanate and m-phthalaldehyde, and the mass ratio of the diamino terminated polydimethylsiloxane to the organic solvent is more than or equal to 0.2 and less than or equal to 0.25; the molecular number of the diamino terminated polydimethylsiloxane is the sum of the molecular number of dicyclohexylmethane diisocyanate and the molecular number of m-phthalaldehyde; the mass of the anti-icing material is 20-50% of the mass of the main material, and referring to fig. 1, the preparation method of the self-lubricating anti-icing material based on the dynamic cross-linking system can comprise the following steps:

step S110, mixing the diamino-terminated polydimethylsiloxane in the main material with the organic solvent and dicyclohexylmethane diisocyanate, and stirring for the first time to obtain a first mixture.

And step S120, adding m-phthalaldehyde into the first mixture, and stirring for the first time to obtain a second mixture.

And S130, adding the anti-icing substance into the second mixture, and stirring for the second time to obtain a target mixture.

And S140, pouring the target mixture into a mold for cooling to obtain the self-lubricating anti-icing material based on the dynamic crosslinking system.

Wherein the mass ratio of the diamino terminated polydimethylsiloxane to the organic solvent is more than or equal to 0.2 and less than or equal to 0.25; the molecular number of the diamino terminated polydimethylsiloxane is the sum of the molecular number of dicyclohexylmethane diisocyanate and the molecular number of m-phthalaldehyde; the mass of the anti-icing substance is 20-50% of the mass of the main material.

Wherein the stirring time of the first stirring and the second stirring can be 6 hours, the temperature during stirring can be 60 ℃, and the nitrogen protection is provided.

The following describes the detailed machine preparation method of the self-lubricating anti-icing material based on the dynamic cross-linking system when x is 0.0232, y is 0.0116 and z is 0.0116 by using an embodiment.

Main materials: 20g of a bisamino-terminated polydimethylsiloxane having a molar mass of 860g/mol, about 0.0232 mol; 3.05g of dicyclohexylmethane diisocyanate (molar mass 262.35g/mol), approx.0.0116 mol; 1.56g of isophthalaldehyde (134.12 g/mol, molar mass) and about 0.0116 mol. That is, the molecular number of the bisamino-terminated polydimethylsiloxane is the sum of the molecular numbers of dicyclohexylmethane diisocyanate and isophthalaldehyde.

When the main material is the above, the mass of the organic solvent may be 80g or 100g, or may be any weight more than 80g and less than 100g, for example, 88.92g, 88g, 90g, or the like.

The mass of the anti-icing substance can be 4.992g or 12.305g, or any weight more than 4.992g and less than 12.305g, such as 7.38g, 8.8g, 9.0g, etc