CN108117470A - A kind of method that CL-20 mechanical sensitivities are reduced using poly-dopamine - Google Patents
A kind of method that CL-20 mechanical sensitivities are reduced using poly-dopamine Download PDFInfo
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- CN108117470A CN108117470A CN201711382071.2A CN201711382071A CN108117470A CN 108117470 A CN108117470 A CN 108117470A CN 201711382071 A CN201711382071 A CN 201711382071A CN 108117470 A CN108117470 A CN 108117470A
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- Prior art keywords
- dopamine
- poly
- cladding
- reduces
- mechanical
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Classifications
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- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B45/00—Compositions or products which are defined by structure or arrangement of component of product
- C06B45/18—Compositions or products which are defined by structure or arrangement of component of product comprising a coated component
- C06B45/20—Compositions or products which are defined by structure or arrangement of component of product comprising a coated component the component base containing an organic explosive or an organic thermic component
- C06B45/22—Compositions or products which are defined by structure or arrangement of component of product comprising a coated component the component base containing an organic explosive or an organic thermic component the coating containing an organic compound
- C06B45/24—Compositions or products which are defined by structure or arrangement of component of product comprising a coated component the component base containing an organic explosive or an organic thermic component the coating containing an organic compound the compound being an organic explosive or an organic thermic component
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B21/00—Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
- C06B21/0008—Compounding the ingredient
- C06B21/0016—Compounding the ingredient the ingredient being nitrocellulose or oranitro cellulose based propellant; Working up; gelatinising; stabilising
Abstract
A kind of method for reducing its mechanical sensitivity using poly-dopamine cladding CL 20 provided by the invention.The present invention selects covering material poly-dopamine that can form uniformly complete cladding shell on 20 surfaces of CL, and the surface of CL 20 is made to be coated completely.The CL 20 being prepared using this method, mechanical sensitivity have the reduction of obvious degree compared with uncoated CL 20, improve the security performance of CL 20, promote practical applications of the CL 20 in explosive wastewater.
Description
Technical field
The present invention relates to a kind of CL-20 method for coating, particularly a kind of method of poly-dopamine cladding CL-20.
Background technology
Hexanitrohexaazaisowurtzitane (CL-20) is a kind of more nitroamino-compounds of cage type, energy and density ratio other
Monocyclic nitramine is high, and theoretical explosion velocity reaches 9550rn/s, is the heretofore known highest single chmical compound explosive of the explosion velocity with application value.
CL-20 is once appearance, just as the research hotspot in each field of explosive wastewater.CL-20 is applied to all kinds of explosive wastewater products, and (a small number of fire are fried
Except medicine product), all possible war skill index for improving related weaponry.Therefore, the extensive use of CL-20 is promoted, is to develop
The important technology approach that new-type weapon and equipment and weaponry and equipment in active service update.But the mechanical sensitivity of CL-20 itself is higher, is
It can more safely be used in high performance solid propellants and high explosive etc., it is necessary to carry out to it drop sense processing.
In recent years, domestic and international researcher has done substantial amounts of research in terms of CL-20 mechanical sensitivities are reduced, and occurs very
It drops sensing methods more, such as improves CL-20 grain shapes, inhibits turn crystalline substance of CL-20 and surface cladding and modification are carried out to CL-20
Deng wherein it is that a kind of method is relatively easy and compare effective way that coating modification is carried out to CL-20 surfaces.Beijing Institute of Technology's gold
Beautiful spring-time et al., the mixing using CL-20 as base being prepared by water suspension method technique was fried using fluorubber F-5 as binding agent
The mechanical impacting sensitivity of medicine is minimum, and characteristic drop height value is 42.5cm.Silver-colored photoinitiator chemical group Wang Xiaojun etc. disperses to wrap by aqueous suspension
4,5-MDNI is coated on the surface of CL-20 particles by coating process, and impact sensitivity test shows：After cladding content be 6% 4,5-
MDNI can make CL-20 impact sensitivities (2.5kg drops hammer) explosion percentage be reduced to 8% by 100%.Although pass through above method pair
CL-20 can obtain certain drop sense effect, but above-mentioned method for coating usually using high molecular material as covering, pass through
The method of physical absorption realizes the cladding on CL-20 surfaces.But the characteristics of due to this body structure of high molecular material and molecularly oriented,
It is difficult to realize the accurate control to CL-20 surface coating layers, the integrality of cladding, lack of homogeneity.Therefore, it is guarantee clad structure
Integrality, generally require to increase the dosage of covering, additive amount often reaches more than 5%, in turn results in material after cladding
In CL-20 content it is relatively low, cause hydraulic performance decline.In addition, utilize the side such as vapor deposition, atomic layer deposition or ion beam depositing
Method can be in uniform, the fine and close clad of CL-20 Surface Creations, and can realize the regulation and control to coating thickness.It is but this kind of
Method is more demanding to instrument and equipment, complex process and yield is very low, it is difficult to large-scale promotion application.
The content of the invention
Insufficient the technical problem to be solved by the present invention is to be directed to present in background technology, providing a kind of can make CL-20's
The method that mechanical sensitivity is lower and performance is not decreased obviously.
The thinking of the present invention：Poly-dopamine (PDA) molecule has extremely strong adsorptivity and autohemagglutination can occur in a solvent
Collection acts on, and the controllable thin polymer film of thickness can be formed in matrix surface.The present invention is using the CL-20 of poly-dopamine processing, profit
Its uniform adsorption on CL-20 surfaces is realized with the amino and hydroxyl structure enriched on dopamine molecule, using dopamine molten
Distinctive self aggregation characteristic under agent environment makes it that self aggregation effect in situ occur on CL-20 surfaces, and then in the table of CL-20
Face forms uniform and complete PDA shells.It, can since the effect of this self aggregation is that original position is happened at CL-20 surfaces
The surface of CL-20 is coated within the shell of PDA completely, can realize being greatly reduced for mechanical sensitivity, security performance is notable
It improves.Further, since this shell generated based on self aggregation effect in situ is uniformly and complete, in the bag that CL-20 surfaces are formed
Coating thickness is usually no more than 50nm, and the usage amount of covering material PDA can be greatly decreased, and is not generated after coating and turn brilliant existing
As that can ensure that the CL-20 performances of cladding are not decreased obviously, and operating method is simple, is conducive to large-scale promotion.
In order to solve the above technical problems, the present invention provides a kind of method that poly-dopamine reduces CL-20 mechanical sensitivities, step
It is as follows：
(1) dopamine is dissolved in solvent, being aided with ultrasonic wave is completely dissolved it, is made into the dopamine that concentration is 1~4g/L
Solution；The quality of dopamine is 0.2%~0.5% of CL-20 mass after pretreatment；Dopamine can be dopamine, dopamine
One kind in the catechols such as hydrochloride, levodopa；The solvent is water, ethyl alcohol, methanol, formic acid, Tris
One kind in buffer buffer solvents；
(2) raw material CL-20 (average grain diameter is 10nm~200 μm) is added in aqueous dopamine solution, be dispersed with stirring at room temperature
After 20min, be added dropwise aqueous slkali into solution, lye can be ammonium hydroxide, sodium hydroxide solution, one kind in potassium hydroxide solution or
Several, rate of addition is preferably 1~2 drop/s, adjusts the scope of pH to 7~9, and 4~6h is stirred by ultrasonic, when standing 8~16 is small, from
The heart, washing are put into vacuum drying chamber drying, obtain the CL-20 of poly-dopamine cladding.
Beneficial effects of the present invention：
(1) poly-dopamine considerably reduces the mechanical sensitivity of CL-20, under same experimental conditions to the cladding of CL-20
The characteristic drop height of the CL-20 compounds of poly-dopamine cladding is measured up to 23.50cm (5kg drops hammer), improves 270%.
(2) usage amount of covering material poly-dopamine is extremely low, the quality of DOPA amine monomers be raw material CL-20 0.5%~
2%.
Description of the drawings
Fig. 1 is the TEM photos of the CL-20 compounds of poly-dopamine obtained cladding.
Fig. 2 is the SEM photograph of the CL-20 compounds of poly-dopamine obtained cladding.
Fig. 3 is the infrared spectrum of CL-20 compounds before and after cladding
Specific embodiment
With reference to embodiment, the present invention is described further.
Embodiment 1
It weighs 0.05g Dopamine hydrochlorides to add in 50mL ethyl alcohol, being aided with ultrasonic wave is completely dissolved it, is made into 1.0g/L's
Dopamine hydrochloride solution.
It weighs the raw material CL-20 that 10g average grain diameters are 500nm to add in above-mentioned Dopamine hydrochloride solution, ultrasonic agitation
Until after being uniformly dispersed, sodium hydroxide ethanol solution is slowly dropped into molten with constant pressure funnel with the speed of 1~2 drop/s by 20min
Liquid pH value reaches 8.5, continues to stir 6h at room temperature after completion of dropwise addition.When standing 12 is small after stirring.Then centrifugation, with distillation
Water washing 3 times places dry 12h in vacuum drying chamber, obtains the CL-20 compounds of poly-dopamine cladding.
Embodiment 2
It weighs 0.1g levodopas to add in 50mL distilled water, being aided with ultrasonic wave is completely dissolved it, is made into the salt of 2g/L
Sour dopamine solution.
It weighs the raw material CL-20 that 10g average grain diameters are 500nm to add in above-mentioned levodopa solution, ultrasonic agitation
20min until after being uniformly dispersed, is slowly dropped into ammonium hydroxide to solution ph with the speed of 1~2 drop/s with constant pressure funnel and reaches
8.5, continue to stir 6h at room temperature after completion of dropwise addition.When standing 12 is small after stirring.Then centrifugation, is washed with distilled water 3 times,
Dry 12h in vacuum drying chamber is placed, obtains the CL-20 compounds of poly-dopamine cladding.
Embodiment 3
It weighs 0.2g Dopamine hydrochlorides to add in the Tris buffer buffer solvents of 50ml, being aided with ultrasonic wave makes it completely
Dissolving is made into the Dopamine hydrochloride solution of 4g/L.
The raw material CL-20 that 10g average grain diameters are 500nm is weighed to add in above-mentioned Dopamine hydrochloride solution, it is ultrasonic at room temperature
4h is stirred, when standing 12 is small after stirring.Then centrifugation, is washed with distilled water 3 times, places dry 12h in vacuum drying chamber,
Obtain the CL-20 compounds of poly-dopamine cladding.
The structural characterization of poly-dopamine cladding CL-20 prepared by the present invention and performance test：
(1) structural characterization of poly-dopamine cladding CL-20
Fig. 1 a are the SEM photograph of raw material CL-20 compounds, and Fig. 1 b are the SEM photograph of CL-20 compounds after cladding.From Fig. 1
In it can be seen that, the CL-20 particle surfaces after cladding cover one layer of uniform film, and CL-20 surfaces are completely covered film.
Due to being not added with other compounds in sample preparation procedure, it is known that surface coated to should be poly-dopamine film.After Fig. 2 is cladding
The TEM photos of CL-20 compounds, from the figure, it can be seen that the thickness of CL-20 surface films is 10nm or so.Before Fig. 3 is cladding
The infrared spectrum of CL-20 compounds afterwards.Wherein a is the infrared spectrum of raw material CL-20, and b is that poly-dopamine coats the infrared of CL-20
Spectrogram, as seen from the figure, the crystal form of CL-20 does not change before and after cladding, i.e., will not be generated and turned using poly-dopamine cladding CL-20
The phenomenon that brilliant.
(2) the impact sensitivity test of poly-dopamine cladding CL-20
The test method of mechanical sensitivity tests impact sensitivity according to GJB772-1997.601 in the present invention, and KAST types are hit
Sensibility instrument, quality of dropping hammer 5kg, sample once used amount be 50mg, every group 30 times experiment.According to this method, institute in embodiment is measured
It is as shown in table 1 to obtain zirconium compound particle mechanical sensitivity data：
1 characteristic drop height H of table50(cm)
| Sample | Raw material CL-20 | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| CL-20 after poly-dopamine cladding | 6.53 | 15.20 | 19.10 | 23.50 |
It can be seen that the CL-20 impact sensitivities after cladding are greatly lowered by data, characteristic drop height is used with dopamine
The increase of amount and improve.This method can enhance CL-20 safety in utilization, and covering dosage is seldom, and CL-20 performances are influenced
It is smaller.
Claims (5)
- A kind of 1. method that CL-20 mechanical sensitivities are reduced using poly-dopamine, it is characterised in that comprise the following steps：(1) DOPA amine monomers are dissolved in solvent, are made into the dopamine monomer solution that concentration is 1~4g/L；(2) raw material CL-20 is added in dopamine monomer solution, after being dispersed with stirring 20min at room temperature, alkali soluble is added dropwise into solution Liquid adjusts pH to 7~9, and 4~6h is stirred by ultrasonic, and when standing 8~16 is small, centrifuges, washs, and drying obtains poly-dopamine cladding CL-20 compounds；The quality of wherein described dopamine monomer is the 0.5%~2% of raw material CL-20.
- 2. the method that poly-dopamine according to claim 1 reduces CL-20 mechanical sensitivities, it is characterised in that the raw material The average grain diameter of CL-20 is 10nm~200 μm.
- 3. the method that poly-dopamine according to claim 1 reduces CL-20 mechanical sensitivities, it is characterised in that the aqueous slkali Rate of addition is 1~2 drop/s.
- 4. the method that poly-dopamine according to claim 1 reduces CL-20 mechanical sensitivities, it is characterised in that the DOPA Amine monomers are dopamine, one kind in dopamine hydrochloride, levodopa.
- 5. the method that poly-dopamine according to claim 1 reduces CL-20 mechanical sensitivities, it is characterised in that the solvent is One kind in distilled water, ethyl alcohol, methanol, acetic acid, Tris buffer buffer solvents.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711382071.2A CN108117470A (en) | 2017-12-20 | 2017-12-20 | A kind of method that CL-20 mechanical sensitivities are reduced using poly-dopamine |
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| CN201711382071.2A CN108117470A (en) | 2017-12-20 | 2017-12-20 | A kind of method that CL-20 mechanical sensitivities are reduced using poly-dopamine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110066210A (en) * | 2019-04-25 | 2019-07-30 | 中国工程物理研究院化工材料研究所 | A kind of hud typed nanometer metallic silver and explosive compound preparation method |
| CN111441088A (en) * | 2020-04-03 | 2020-07-24 | 北京理工大学 | Method for inhibiting-C L-20 crystal transformation by catecholamine polymer and high crystal transformation resistance-C L-20 crystal |
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| CN105801324A (en) * | 2016-03-04 | 2016-07-27 | 中国工程物理研究院化工材料研究所 | Preparation method for reducing mechanical sensitivity of HMX |
| CN106518582A (en) * | 2016-11-03 | 2017-03-22 | 中国工程物理研究院化工材料研究所 | Preparation method of energetic material with controllable interface infiltration performance |
| CN106631638A (en) * | 2017-01-06 | 2017-05-10 | 中国工程物理研究院化工材料研究所 | Method for improving radiation resistance and ageing of explosive part |
| CN106631639A (en) * | 2017-01-06 | 2017-05-10 | 中国工程物理研究院化工材料研究所 | Method for improving the surface wettability of energetic material and the mechanical property of explosive |
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2017
- 2017-12-20 CN CN201711382071.2A patent/CN108117470A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105801324A (en) * | 2016-03-04 | 2016-07-27 | 中国工程物理研究院化工材料研究所 | Preparation method for reducing mechanical sensitivity of HMX |
| CN106518582A (en) * | 2016-11-03 | 2017-03-22 | 中国工程物理研究院化工材料研究所 | Preparation method of energetic material with controllable interface infiltration performance |
| CN106631638A (en) * | 2017-01-06 | 2017-05-10 | 中国工程物理研究院化工材料研究所 | Method for improving radiation resistance and ageing of explosive part |
| CN106631639A (en) * | 2017-01-06 | 2017-05-10 | 中国工程物理研究院化工材料研究所 | Method for improving the surface wettability of energetic material and the mechanical property of explosive |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110066210A (en) * | 2019-04-25 | 2019-07-30 | 中国工程物理研究院化工材料研究所 | A kind of hud typed nanometer metallic silver and explosive compound preparation method |
| CN110066210B (en) * | 2019-04-25 | 2021-06-22 | 中国工程物理研究院化工材料研究所 | Preparation method of core-shell type nano metal silver and explosive compound |
| CN111441088A (en) * | 2020-04-03 | 2020-07-24 | 北京理工大学 | Method for inhibiting-C L-20 crystal transformation by catecholamine polymer and high crystal transformation resistance-C L-20 crystal |
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Application publication date: 20180605 |