Cyclohexanediamine gel factor, hydrocarbon fuel gel, and preparation method and application thereof

Abstract

The present invention provides a cyclohexanediamine gel factor, a hydrocarbon fuel gel, and a preparation method and application thereof. The cyclohexanediamine gel factor provided by the present invention is a cyclohexanediamine derivative with a specific structure, has excellent gelling properties, can be gelled by adding a small amount, and can be used for the preparation of hydrocarbon fuel gel; its synthesis steps are simple, the conditions are mild, and large-scale production can be achieved. The hydrocarbon fuel gel provided by the present invention includes 94-99.5wt% of hydrocarbon fuel and 0.5-6wt% of the cyclohexanediamine gel factor. The hydrocarbon fuel gel using the cyclohexanediamine gel factor shows excellent properties in terms of storage and safety of use, and can be widely used in the field of gel propellants.

Description

Technical Field

[0001] The invention relates to the technical field of hydrocarbon materials, and in particular to a cyclohexanediamine gel factor, a hydrocarbon fuel gel, and a preparation method and application thereof. Background Art

[0002] Propellant is a key core technology in the field of aerospace and national defense. Conventional propellants are usually divided into solid propellants and liquid propellants. The advantage of solid propellants is that they have a high safety factor, but their energy content is low and the fuel is difficult to refuel. In comparison, liquid propellants have excellent overall specific impulse and are easy to refuel. Among them, liquid hydrocarbon fuel is the main power source of current aerospace propulsion systems, but liquid hydrocarbon fuel is very easy to leak during storage and refueling, causing corrosion, poisoning, combustion and explosion and other major safety accidents. In order to further improve the safety of hydrocarbon fuel use and expand the scope of use of hydrocarbon fuel, researchers have tried many methods, among which the use of gel factors to prepare liquid hydrocarbon fuel into gel is one of the important development directions at present.

[0003] Hydrocarbon fuel gel is a semi-solid with a three-dimensional network structure formed by adding gel factors to its solution through physical or chemical cross-linking. The hydrocarbon fuel solution will be confined in the three-dimensional network gaps formed by the gel factors as a dispersion medium, and has a special solid-liquid form. It exhibits solid properties when standing still and liquid properties after being subjected to shear force. It has the advantages of both solid and liquid propellants. The performance and storage performance of gel hydrocarbon fuel are basically the same as its liquid matrix, and its gel state can be maintained for a long time. It can effectively reduce the fluidity of hydrocarbon fuel without affecting the performance, reduce the risk of leakage, and improve the safety of use.

[0004] Hydrocarbon fuel is an important component of propellant. The safer and more efficient use of liquid hydrocarbon fuel is crucial to the development of future high-performance propulsion systems and high-performance aircraft. Different types of gel factors have a huge impact on the performance of hydrocarbon fuel gel.

[0005] Existing gelling factors have problems such as complex synthesis routes, high process costs, high amounts of gelling factors required for gelling, and only being able to gel specific hydrocarbon fuels. Therefore, it is very necessary to develop new hydrocarbon fuel gelling factors. Summary of the invention

[0006] In order to solve the problems existing in the prior art, the first aspect of the present invention provides a cyclohexanediamine gel factor having one of the molecular structures shown in Formula I to Formula III:

[0007] ,

[0008] Wherein R is an alkyl group having 4 to 20 carbon atoms.

[0009] The cyclohexanediamine gel factor provided by the present invention has a simple preparation process and can be prepared on a large scale; it has excellent gelling performance and can be gelled by adding a small amount, and has obvious economic benefits; it has a wide range of applications and can be used to prepare various hydrocarbon fuels into gels.

[0010] In some embodiments, R is an alkyl group having 6 to 18 carbon atoms.

[0011] In some embodiments, R is an alkyl group having 6, 8, 10, 12, 14, 16, or 18 carbon atoms.

[0012] In some embodiments, the cyclohexanediamine gel factor has one of the following structures:

[0013] .

[0014] In a second aspect, a method for preparing the cyclohexanediamine gel factor is provided, wherein: a. The method for preparing the cyclohexanediamine gel factor of the structure shown in Formula I comprises: adding trans-cyclohexanediamine to a solvent, dropping the corresponding isocyanate, stirring and mixing at room temperature, and then heating under reflux for reaction;

[0015] and / or, b. A method for preparing a cyclohexanediamine gel factor having a structure shown in formula II comprises: adding trans-cyclohexanediamine, 1-(3-dimethylaminopropyl)-3-ethylcarbamimidohydrochloride, 1-hydroxybenzotriazole, triethylamine and a corresponding alkyl acid to a solvent, and heating under reflux for reaction;

[0016] And / or, c. The preparation method of the cyclohexanediamine gel factor of the structure shown in formula III comprises: adding N-BOC-trans-1,2-diaminocyclohexane and the corresponding isocyanate to the solvent for reaction, adjusting the pH to acidic with acid, removing BOC, and then condensing with the corresponding alkyl acid.

[0017] The preparation method of the cyclohexanediamine gel factor provided by the present invention has simple synthesis steps, mild conditions, can be prepared on a large scale, and the reaction process does not require nitrogen protection; the synthesized gel factor has excellent gelling performance, can be used for the preparation of hydrocarbon fuel gel, and has good application prospects in the field of gel propellants.

[0018] In some embodiments, the reaction temperature in a is 50-100° C., and the time is 6-12 h; and / or the reaction temperature in b is 50-100° C., and the time is 1-3 d.

[0019] In some embodiments, the acid used to adjust the pH in c is at least one of hydrochloric acid, sulfuric acid, acetic acid and trifluoroacetic acid.

[0020] In some embodiments, in b and c, the alkyl acid is selected from at least one of hexanoic acid, heptanoic acid, octanoic acid, nonanoic acid, decanoic acid, undecanoic acid, dodecanoic acid, tridecanoic acid, tetradecanoic acid, pentadecanoic acid, hexadecanoic acid, heptadecanoic acid, octadecanoic acid or nonadecanoic acid.

[0021] In some embodiments, in ac, the solvent is selected from at least one of toluene, tetrahydrofuran, dichloromethane, chloroform, ethyl acetate, acetonitrile or acetone.

[0022] In a third aspect, a hydrocarbon fuel gel is provided, comprising 94-99.5wt% of hydrocarbon fuel and 0.5-6wt% of a gel factor, wherein the gel factor is the cyclohexanediamine gel factor and / or the cyclohexanediamine gel factor obtained by the preparation method.

[0023] The hydrocarbon fuel gel provided by the present invention exhibits excellent properties in terms of storage and use safety, and can be widely used in the field of gel propellants.

[0024] Preferably, the hydrocarbon fuel gel comprises 97-99.5wt% of hydrocarbon fuel and 0.5-3wt% of cyclohexanediamine gel factor.

[0025] In some embodiments, the hydrocarbon fuel is selected from at least one of kerosene, aviation kerosene, tetrahydrodicyclopentadiene, alkane compounds, cyclohexane compounds, benzene compounds or naphthalene compounds.

[0026] In some embodiments, the aviation kerosene is selected from at least one of RP-1 to RP-3.

[0027] In some embodiments, the alkane compound is selected from n-octane, n-nonane, n-decane, n-undecane, n-dodecane, n-tridecane, n-tetradecane, n-pentadecane or n-hexadecane, or the corresponding isomers of the alkane compound.

[0028] In some embodiments, the cyclohexane compound is selected from cyclohexane or alkyl-substituted cyclohexane; the alkyl-substituted cyclohexane includes methylcyclohexane, ethylcyclohexane, propylcyclohexane, isopropylcyclohexane, butylcyclohexane or cyclohexylcyclohexane.

[0029] In some embodiments, the benzene compound is selected from benzene or alkyl-substituted benzene; the alkyl-substituted benzene includes toluene or ethylbenzene.

[0030] In some embodiments, the naphthalene compound is selected from tetralin, decalin, alkyl-substituted tetralin or alkyl-substituted decalin.

[0031] In a fourth aspect, a method for preparing the hydrocarbon fuel gel is provided, comprising the following steps: adding the cyclohexanediamine gel factor and / or the cyclohexanediamine gel factor obtained by the preparation method to a hydrocarbon fuel, heating until dissolved, standing and cooling to room temperature, to obtain the hydrocarbon fuel gel.

[0032] In some embodiments, the heating temperature is 80-120° C. and the heating time is 5-10 min.

[0033] In a fifth aspect, there is provided application of the hydrocarbon fuel gel and / or the hydrocarbon fuel gel obtained by the preparation method in propellants.

[0034] Compared with the prior art, the present invention has the following beneficial effects: the synthesis steps of the gel factor are simple, the conditions are mild, and it can be prepared on a large scale. The synthesized gel factor has excellent gelling properties and can be used for the preparation of hydrocarbon fuel gel. The amount of the required gel factor is low, the economic benefits are obvious, and it has good application prospects in the field of gel propellants. The hydrocarbon fuel gel using the cyclohexanediamine gel factor exhibits excellent properties in terms of storage and use safety, and can be widely used in the field of gel propellants. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 It is one of the mass spectra of the cyclohexanediamine gel factor provided by the present invention.

[0037] Figure 2 This is one of the nuclear magnetic spectra of the cyclohexanediamine gel factor provided by the present invention.

[0038] Figure 3 This is one of the physical images and scanning electron microscope (SEM) images of the hydrocarbon fuel gel provided by the present invention.

[0039] Figure 4 This is the second of the physical pictures and scanning electron microscope (SEM) pictures of the hydrocarbon fuel gel provided by the present invention.

[0040] Figure 5 This is the third physical image and scanning electron microscope (SEM) image of the hydrocarbon fuel gel provided by the present invention.

[0041] Figure 6 This is the fourth physical image and scanning electron microscope (SEM) image of the hydrocarbon fuel gel provided by the present invention. DETAILED DESCRIPTION

[0042] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0043] In the prior art, the existing gel factor synthesis route is complex and the process cost is high; in the preparation process of hydrocarbon fuel gel, 3-8wt% of the gel factor needs to be added, which causes a certain degree of cost increase economically; the scope of application is limited, and only specific hydrocarbon fuels can be made into gel.

[0044] Based on this, in the first aspect of the present invention, a cyclohexanediamine gel factor is provided, characterized in that at least one of the molecular structures shown in Formula I to Formula III is:

[0045] ,

[0046] Wherein R is an alkyl group having 4 to 20 carbon atoms.

[0047] R can be an alkyl group with any integer number of carbon atoms from 4 to 20, such as R is an alkyl group with 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, or 18 carbon atoms; it can also be an alkyl group with a number of carbon atoms within a numerical range formed by these integers, such as an alkyl group with 10 to 16 carbon atoms, an alkyl group with 6 to 10 carbon atoms, an alkyl group with 12 to 18 carbon atoms, an alkyl group with 12 to 16 carbon atoms, etc. For the sake of brevity, they are not listed one by one.

[0048] In a second aspect, a method for preparing the cyclohexanediamine gel factor is provided, which is specifically as follows.

[0049] The preparation method of the cyclohexanediamine gel factor of the molecular structure shown in formula I is as follows: 1 eq of trans-cyclohexanediamine is added to a reactor filled with a solvent, and (2.0-2.2) eq of the corresponding isocyanate is added dropwise, and the mixture is stirred at room temperature and then heated and refluxed for reaction; the synthesis route is as follows:

[0050] .

[0051] Wherein, the reaction temperature is 50~100℃, preferably 60-100℃, for example 60℃, 70℃, 80℃, 90℃, 100℃, and can also be a range composed of these point values, such as 60-90℃, 70-90℃, 80-90℃, 80-100℃, 85-95℃, etc.; the reaction time is 6-12h, preferably 8-10h, for example 8h, 9h, 10h, etc., and can also be a range composed of these time point values, such as 8-9h, 9-10h, etc.

[0052] The preparation method of the cyclohexanediamine gel factor of the molecular structure shown in formula II is as follows: 1 eq of trans-cyclohexanediamine, (2.1-2.3) eq of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDCI), (2.1-2.3) eq of 1-hydroxybenzotriazole (HOBT), an appropriate amount of triethylamine and (2.1-2.3) eq of the corresponding alkyl acid are added to a reactor filled with a solvent, and the mixture is heated and refluxed for reaction. The synthesis route is as follows:

[0053] .

[0054] Wherein, the reaction temperature is 50~100°C, preferably 80~100°C, for example 80°C, 90°C, 100°C, and can also be a range composed of these point values, such as 80-90°C, 80-100°C, 85-95°C, etc.; the reaction time is 1~3d, preferably 2~3d, such as 48h, 50h, 52h, 55h, 60h, 65h, 70h, 72h, etc., and can also be a range composed of these time point values, such as 50-60h, 48-60h, 50-72h, etc., which are not listed one by one here.

[0055] The preparation method of the cyclohexanediamine gel factor of the molecular structure shown in Formula III is as follows: 1 eq of N-BOC-trans-1,2-diaminocyclohexane and (1.1-1.3) eq of the corresponding isocyanate are added to a reactor filled with a solvent for reaction, the pH is adjusted to acidity with an acid, the BOC (tert-butyloxycarbonyl) is removed, and then condensed with (1.1-1.3) eq of the corresponding alkyl acid; the synthesis route is as follows:

[0056] .

[0057] The acid used to adjust the pH is selected from at least one of hydrochloric acid, sulfuric acid, acetic acid and trifluoroacetic acid. Preferably, the acid is hydrochloric acid and / or trifluoroacetic acid.

[0058] The isocyanate mentioned above can be selected from at least one of hexyl isocyanate, heptyl isocyanate, octyl isocyanate, nonyl isocyanate, decyl isocyanate, dodecyl isocyanate, tetradecyl isocyanate, hexadecyl isocyanate and octadecyl isocyanate.

[0059] The alkyl acid mentioned above can be selected from at least one of hexanoic acid, heptanoic acid, octanoic acid, nonanoic acid, decanoic acid, undecanoic acid, dodecanoic acid, tridecanoic acid, tetradecanoic acid, pentadecanoic acid, hexadecanoic acid, heptadecanoic acid, octadecanoic acid or nonadecanoic acid.

[0060] The solvent mentioned above can be selected from at least one of toluene, tetrahydrofuran, dichloromethane, chloroform, ethyl acetate, acetonitrile or acetone.

[0061] The unit of dosage mentioned above, eq, means equivalent. For example, in the preparation of the structure shown in Formula I, when the dosage of trans-cyclohexylene diamine is 1 mol, the dosage of isocyanate is 2.0-2.2 mol, that is, the above dosage can be understood as a molar ratio.

[0062] In a third aspect, a hydrocarbon fuel gel is provided, comprising 94-99.5wt% of hydrocarbon fuel and 0.5-10wt% of a gel factor, wherein the gel factor is the cyclohexanediamine gel factor and / or the cyclohexanediamine gel factor obtained by the preparation method.

[0063] In some embodiments, the hydrocarbon fuel gel includes 97-99.5 wt % of the hydrocarbon fuel and 0.5-3 wt % of a gel factor.

[0064] In some embodiments, the hydrocarbon fuel gel comprises 98-99 wt% of the hydrocarbon fuel and 1-2 wt% of a gelling factor, for example, the amount of the gelling factor is 1 wt%, 1.5 wt%, 2 wt%, or 1-1.5 wt%.

[0065] In some embodiments, the hydrocarbon fuel is selected from at least one of kerosene, aviation kerosene, tetrahydrodicyclopentadiene, alkane compounds, cyclohexane compounds, benzene compounds or naphthalene compounds.

[0066] In some embodiments, the aviation kerosene is selected from at least one of RP-1 to RP-3.

[0067] In some embodiments, the alkane compound is selected from n-octane, n-nonane, n-decane, n-undecane, n-dodecane, n-tridecane, n-tetradecane, n-pentadecane or n-hexadecane, or the corresponding isomers of the alkane compound.

[0068] In some embodiments, the cyclohexane compound is selected from cyclohexane or alkyl-substituted cyclohexane; the alkyl-substituted cyclohexane includes methylcyclohexane, ethylcyclohexane, propylcyclohexane, isopropylcyclohexane, butylcyclohexane or cyclohexylcyclohexane.

[0069] In some embodiments, the benzene compound is selected from benzene or alkyl-substituted benzene; the alkyl-substituted benzene includes toluene or ethylbenzene.

[0070] In some embodiments, the naphthalene compound is selected from tetralin, decalin, alkyl-substituted tetralin or alkyl-substituted decalin.

[0071] In some embodiments, the hydrocarbon fuel is JP-10 or the alkane compound.

[0072] In a fourth aspect, a method for preparing the hydrocarbon fuel gel is provided, comprising: adding cyclohexanediamine gelling factor to hydrocarbon fuel, heating until dissolved, standing and cooling to room temperature, to obtain the hydrocarbon fuel gel.

[0073] Among them, the heating temperature is 80~120℃, preferably 80~110℃, for example 80℃, 90℃, 100℃, 110℃, and can also be a range composed of these point values, such as 80-100℃, etc.; the heating time is 5~10min, preferably 5~8min, for example 5min, 6min, 7min, 8min, etc., and can also be a range composed of these time point values, such as 5-7min, 6-7min, etc.

[0074] A fifth aspect provides the use of the hydrocarbon fuel gel in a propellant.

[0075] If no specific techniques or conditions are specified in the examples, the techniques or conditions described in the literature in the field or the product instructions are used. If no manufacturer is specified for the reagents or instruments used, they are all conventional products that can be purchased commercially.

[0076] The present invention is described below with reference to specific embodiments. It should be noted that these embodiments are merely illustrative and do not limit the present invention in any way.

[0077] Example 1

[0078] This embodiment provides a cyclohexanediamine gel factor, which is a cyclohexanediamine derivative of formula I (R is a straight-chain alkyl group with 6 carbon atoms) having the following structure:

[0079] .

[0080] This embodiment also provides a method for preparing the cyclohexanediamine gel factor: weigh 5g of trans-cyclohexanediamine and add it into a round-bottom flask filled with 100ml of tetrahydrofuran, and drop 11.7g of isocyanate in the stirring process. During this process, white solid precipitation can be observed. After the dropwise addition is completed, the reaction system is heated to reflux at 90°C and stirred for reaction for 8h. After the reaction is completed, it is filtered with a Buchner funnel, and the filter cake is washed twice with tetrahydrofuran and dried to obtain a white solid.

[0081] The cyclohexanediamine derivative of formula I (R is a straight-chain alkyl group with 6 carbon atoms) has a mass spectrum and a nuclear magnetic resonance spectrum as shown in Figure 1 and Figure 2 As shown, from Figure 1 (ESI-MS) shows that the structural formula of the cyclohexanediamine gel factor provided in Example 1 is C 20 H 40N4O2, molecular weight 369.3224 [M+H]+; found: 369.3219 [M+H]+; from Figure 2 From the nuclear magnetic resonance hydrogen spectrum (1H NMR (400 MHz, CDCl3)), it can be seen that the nuclear magnetic information of the cyclohexanediamine gel factor is as follows: δ 5.70 (s, 2H), 5.04 (s, 2H), 3.44 – 3.27 (m, 2H), 3.21 – 2.97 (m, 4H), 2.10 – 1.93 (m, 2H), 1.69 (s, 2H), 1.54 – 1.38 (m, 4H), 1.37 – 1.09 (m, 16H), 0.87 (t, J= 8.0 Hz, 6H).

[0082] Combination Figure 1 and Figure 2 It can be determined that the cyclohexanediamine gel factor shown in formula (1) was successfully prepared in this embodiment.

[0083] Example 2

[0084] This embodiment provides a hydrocarbon fuel gel, which is composed of 99wt% of hydrocarbon fuel and 1wt% of the cyclohexanediamine gel factor provided in Example 1. The hydrocarbon fuel is tetrahydrodicyclopentadiene JP-10.

[0085] This embodiment also provides a method for preparing the hydrocarbon fuel gel: 0.01 g of cyclohexanediamine gel factor is added to 0.99 g of tetrahydrodicyclopentadiene JP-10, the system is heated to 110° C., heated for 6 minutes until the gel factor is completely dissolved, and allowed to stand and cool to room temperature to form an invertible translucent gel.

[0086] Example 3

[0087] This embodiment provides a cyclohexanediamine gel factor, a cyclohexanediamine derivative of formula I (R is a straight-chain alkyl group with 18 carbon atoms), and the specific structure is as follows:

[0088] .

[0089] This embodiment also provides a method for preparing the cyclohexanediamine gel factor: 5 g of trans-cyclohexanediamine is weighed and added into a round-bottom flask containing 200 ml of tetrahydrofuran, and 27.2 g of octadecyl isocyanate is added dropwise during stirring. During this process, white solid precipitation can be observed. After the addition is completed, the reaction system is heated to reflux at 90° C. and stirred for reaction for 10 hours. After the reaction is completed, it is filtered with a Buchner funnel, and the filter cake is washed twice with tetrahydrofuran and dried to obtain a white solid.

[0090] Example 4

[0091] This embodiment provides a hydrocarbon fuel gel, which is composed of 99wt% of hydrocarbon fuel and 1wt% of the cyclohexanediamine gel factor provided in Example 3. The hydrocarbon fuel is tetrahydrodicyclopentadiene JP-10.

[0092] This embodiment also provides a method for preparing the hydrocarbon fuel gel: 0.01 g of cyclohexanediamine gel factor is added to 0.99 g of tetrahydrodicyclopentadiene JP-10, the system is heated to 110° C., heated for 6 minutes until the gel factor is completely dissolved, and allowed to stand and cool to room temperature to form an invertible transparent gel.

[0093] Example 5

[0094] This embodiment provides a cyclohexanediamine gel factor, which is a cyclohexanediamine derivative of formula II (R is a straight-chain alkyl group with 6 carbon atoms), and the specific structure is as follows:

[0095] .

[0096] This example also provides a method for preparing the cyclohexanediamine gel factor: 5 g of trans-cyclohexanediamine, 18.5 g of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDCI), 13.1 g of 1-hydroxybenzotriazole (HOBT) and 12.5 g of heptanoic acid were weighed and added into a round-bottom flask containing 250 ml of tetrahydrofuran and 20 ml of triethylamine, and the reaction system was heated to reflux at 90° C. for 3 days. After the reaction was monitored, a white solid was obtained by column chromatography.

[0097] Example 6

[0098] This embodiment provides a hydrocarbon fuel gel, which is composed of 99wt% of hydrocarbon fuel and 1wt% of the cyclohexanediamine gel factor provided in Example 5. The hydrocarbon fuel is tetrahydrodicyclopentadiene JP-10.

[0099] This embodiment also provides a method for preparing the hydrocarbon fuel gel: 0.01 g of cyclohexanediamine gel factor is added to 0.99 g of tetrahydrodicyclopentadiene JP-10, the system is heated to 110° C., heated for 6 minutes until the gel factor is completely dissolved, and allowed to stand and cool to room temperature to form an invertible transparent gel.

[0100] Example 7

[0101] This embodiment provides a cyclohexanediamine gel factor, which is a cyclohexanediamine derivative of formula II (R is a straight-chain alkyl group of 18 carbon atoms), and the specific structure is as follows:

[0102] .

[0103] This example also provides a method for preparing the cyclohexanediamine gel factor: 5 g of trans-cyclohexanediamine, 18.5 g of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDCI), 13.1 g of 1-hydroxybenzotriazole (HOBT) and 27.4 g of nonadecanoic acid were weighed and added into a round-bottom flask containing 400 ml of tetrahydrofuran and 20 ml of triethylamine, and the reaction system was heated to reflux at 90° C. for 3 days. After the reaction was monitored, a white solid was obtained by column chromatography.

[0104] Example 8

[0105] This embodiment provides a hydrocarbon fuel gel, which is composed of 99wt% of hydrocarbon fuel and 1wt% of the cyclohexanediamine gel factor provided in Example 7. The hydrocarbon fuel is tetrahydrodicyclopentadiene JP-10.

[0106] This embodiment also provides a method for preparing the hydrocarbon fuel gel: 0.01 g of cyclohexanediamine gel factor is added to 0.99 g of tetrahydrodicyclopentadiene JP-10, the system is heated to 110° C., heated for 6 minutes until the gel factor is completely dissolved, and allowed to stand and cool to room temperature to form an invertible translucent gel.

[0107] Test Example 1 Analysis of Hydrocarbon Fuel Gel Structure

[0108] Test object: hydrocarbon fuel gel in Examples 2, 4, 6 and 8.

[0109] Test method: A cold field emission scanning electron microscope was used to perform morphological analysis on the gel samples prepared from the hydrocarbon fuel gels in Examples 2, 4, 6, and 8.

[0110] Test results: Figure 3-Figure 6 shown.

[0111] from Figure 3-Figure 6 It can be seen that the cyclohexanediamine gel factors provided in the examples all form nanofibers in the hydrocarbon fuel, and the fibers are entangled with each other to form a semi-solid with a three-dimensional network structure, forming a hydrocarbon fuel gel. Figure 3-6 The results in the figure show that the cyclohexanediamine gel factor provided by the present invention can effectively confine the hydrocarbon fuel solution in the three-dimensional network voids formed by the gel factor, thereby preparing the liquid hydrocarbon fuel into a hydrocarbon fuel gel.

[0112] In the above embodiments, R is an alkyl group having one or more branches, which can also achieve similar effects.

[0113] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hydrocarbon fuel gel, characterized in that: It comprises 98-99wt% of hydrocarbon fuel and 1-2wt% of gel factor, wherein the gel factor has one of the molecular structures shown in Formula I to Formula III: ， Wherein R is an alkyl group having 6 to 18 carbon atoms; and the hydrocarbon fuel is exo-tetrahydrodicyclopentadiene.

2. The hydrocarbon fuel gel according to claim 1, characterized in that: The R is an alkyl group having 6, 8, 10, 12, 14, 16 or 18 carbon atoms.

3. The method for preparing the hydrocarbon fuel gel according to claim 1 or 2, characterized in that: The method comprises the following steps: adding the gel factor described in claim 1 or 2 to a hydrocarbon fuel, heating until dissolved, standing and cooling to room temperature, to obtain the hydrocarbon fuel gel; the hydrocarbon fuel gel is exo-tetrahydrodicyclopentadiene; The heating temperature is 80-120°C and the heating time is 5-10 minutes.

4. The method for preparing the hydrocarbon fuel gel according to claim 3, characterized in that: a. The preparation method of the cyclohexanediamine gel factor of the structure shown in formula I comprises: adding trans-cyclohexanediamine to a solvent, dropping the corresponding isocyanate, stirring and mixing at room temperature, and then heating under reflux for reaction; and / or, b. A method for preparing a cyclohexanediamine gel factor having a structure shown in formula II comprises: adding trans-cyclohexanediamine, 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride, 1-hydroxybenzotriazole, triethylamine and a corresponding alkyl acid to a solvent, and heating under reflux to react; And / or, c. The preparation method of the cyclohexanediamine gel factor of the structure shown in formula III comprises: adding N-BOC-trans-1,2-diaminocyclohexane and the corresponding isocyanate to the solvent for reaction, adjusting the pH to acidic with acid, removing BOC, and then condensing with the corresponding alkyl acid.

5. The method for preparing the hydrocarbon fuel gel according to claim 4, characterized in that: The reaction temperature in a is 50-100°C and the reaction time is 6-12h; And / or, the reaction temperature in b is 50-100° C. and the reaction time is 1-3 days.

6. The method for preparing the hydrocarbon fuel gel according to claim 4, characterized in that: The acid used to adjust the pH in step c is at least one of hydrochloric acid, sulfuric acid, acetic acid and trifluoroacetic acid; and / or, in b and c, the alkyl acid is selected from at least one of heptanoic acid, octanoic acid, nonanoic acid, decanoic acid, undecanoic acid, dodecanoic acid, tridecanoic acid, tetradecanoic acid, pentadecanoic acid, hexadecanoic acid, heptadecanoic acid, octadecanoic acid or nonadecanoic acid; And / or, in ac, the solvent is selected from at least one of toluene, tetrahydrofuran, dichloromethane, chloroform, ethyl acetate, acetonitrile or acetone.

7. Use of the hydrocarbon fuel gel according to any one of claims 1 to 2 and / or the hydrocarbon fuel gel obtained by the preparation method according to any one of claims 3 to 6 in propellants.

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