CN108658710A - A method of improving castexplosive mechanical property - Google Patents
A method of improving castexplosive mechanical property Download PDFInfo
- Publication number
- CN108658710A CN108658710A CN201810426320.1A CN201810426320A CN108658710A CN 108658710 A CN108658710 A CN 108658710A CN 201810426320 A CN201810426320 A CN 201810426320A CN 108658710 A CN108658710 A CN 108658710A
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- CN
- China
- Prior art keywords
- explosive
- castexplosive
- carrier
- mechanical property
- dispersion liquid
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- C06B21/0033—Shaping the mixture
- C06B21/005—By a process involving melting at least part of the ingredients
-
- 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
- C06B21/0033—Shaping the mixture
- C06B21/0058—Shaping the mixture by casting a curable composition, e.g. of the plastisol type
-
- 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
- C06B21/0083—Treatment of solid structures, e.g. for coating or impregnating with a modifier
Abstract
The invention discloses a kind of methods improving castexplosive mechanical property, include the following steps：Step 1: carrying out surface modification to carrier explosive by dopamine auto polymerization method；Step 2: using modified explosive as carrier, suitable solid phase filler is added, castexplosive is made.In the present invention, the poly-dopamine for being coated on carrier explosive surface is uniformly distributed in explosive, can obtain the castexplosive that mechanical property significantly improves.The processing method provided by the present invention mild condition, it is simple and easy to do, can not only surface modification be carried out to simple substance carrier explosive, but also the mechanical property of castexplosive product can be improved.
Description
Technical field
The invention belongs to energetic material fields, and in particular to a method of castexplosive mechanical property being improved, in insensitiveness
There is preferable application prospect in the design of the formulas such as explosive, low Vulnerability Explosive.
Background technology
Castexplosive refers to forming suspension system in high energy solid phase particles addition melting carrier explosive to carry out the mixed of casting dress again
Explosive is closed, this explosive is to complete powder charge process using the phase transformation of carrier explosive, i.e., carrier explosive will be through in powder charge process
Go through the process that solid-state-molten state-solidifies again.Castexplosive makes its safety the problem of gradually being exposed in preparing and using
The technology requirement of insensitive munitions is not achieved in performance：It is that (its tensile strength is less than 2MPa to low-intensity fragile material, and elongation percentage is small
In 0.1%), elasticity and toughness are very poor.The small brittleness powder charge of elasticity is also easy to produce stress concentration when by outer force effect, and sends out
Raw unexpected reaction.The powder charge of poor toughness is durings manufacture, storage, transport etc., due to the effect of mechanical stress, thermal stress,
During ammunition penetration target, generated due to strong overload under strong friction, shearing iso-stress effect, it is easy to damage
Phenomena such as wound, crackle, embrittlement, the reaction center that these defects are exactly powder charge advanced ignition, even explode.
The high tenacity phase such as appropriate polymer is added, the interface interaction between enhancing continuous phase and filling phase, is the U.S. and its
Its country attempts the universal method for solving its brittleness problems, improving its toughness, but common polymer and carrier explosive are only simple
Physical mixed, it is difficult to be uniformly dispersed, or even be precipitated, modified effect is undesirable.For this purpose, there is researcher to be coated using in-situ polymerization
Solid phase explosive adds the method for melting carrier so that polymer uniform is distributed, but this method cannot be fried to the higher carrier of sensitivity
Medicine is effectively coated, and certainly will influence the sensitivity of explosive, and due to the special security requirement of explosive, significantly limit polymerization
The selectivity of monomer and polymerization.
There are the protein that mussel secretes in nature strong adhesion properties, researcher to find wherein to lead by studying in detail
Play adhesion is the pyrocatechol substance contained in protein, this substance may occur under the conditions of certain environment
Poly- reaction, close clad is formed on many kinds of substance surface.It therefore, can be in carrier explosive using this simple self-polymeric reaction
Surface forms the clad of one layer of even compact, during carrier explosive melting-solidification, due to containing in poly-dopamine molecule
Abundant amino, hydroxyl isoreactivity group generate stronger intermolecular force with explosive, so that poly-dopamine is uniformly distributed in molten
It casts in explosive, plays the role of improving mechanical property.
Invention content
The present invention solves common mechanics modifying agent and disperses unevenness in castexplosive, and in-situ polymerization coated explosive is pacified
The problem of full property limitation, provides one kind and can obtain good covered effect under mild reaction conditions and improve founding and fries
The method of medicine mechanical property.The clad even compact formed on carrier explosive surface by dopamine auto polymerization reaction, and
It remains to be uniformly distributed in system during carrier explosive melting-solidification.
The technical solution adopted by the present invention is as follows：
A method of castexplosive mechanical property is improved, is included the following steps：
Step 1: carrying out surface modification to carrier explosive by dopamine auto polymerization method；
Step 2: using modified explosive as carrier, suitable solid phase filler is added, castexplosive is made.
Further scheme is：
The carrier explosive is TNT, DNAN or DNTF.
Further scheme is：
In step 1, surface modification is carried out to carrier explosive, is as follows：
Step 1.1 configuration concentration is 0.1g/L~10g/L trishydroxymethylaminomethanes (Tris) alkaline buffer solution；
Carrier explosive is placed in the solution of above-mentioned configuration by step 1.2, make a concentration of 1g/L of the explosive in system~
100g/L is stirred dispersion liquid using blender with the rotating speed of 100r/min~1000r/min, mixing time be 5min~
30min；
Dopamine hydrochloride is placed in above-mentioned dispersion liquid by step 1.3, makes a concentration of 0.5g/ of the Dopamine hydrochloride in system
L~50g/L is completely dissolved rear solution ph and still needs to be more than 7, stirred with the rotating speed of 100r/min~1000r/min using blender
Mix mixed dispersion liquid, mixing time is 1h~for 24 hours；
The dispersion liquid that stirring is completed is carried out suction filtration cleaning by step 1.4, is made 2~5 times wash with distilled water；
Material after cleaning is placed in 1h in 50 DEG C~80 DEG C baking ovens~for 24 hours by step 1.5, and the carrier for obtaining surface modification is fried
Medicine.
Further scheme is：
The solid phase filler is RDX, HMX or NTO, and the mass ratio shared by castexplosive is 10%~80%.
In the present invention, the poly-dopamine for being coated on carrier explosive surface is uniformly distributed in explosive, and it is aobvious to obtain mechanical property
Write the castexplosive improved.The processing method provided by the present invention mild condition, it is simple and easy to do, both can to simple substance carrier explosive into
Row surface is modified, and the mechanical property of castexplosive product can be improved.
Description of the drawings
Fig. 1 be DNAN planes of crystal before modified after particle surface microscopic topographic.
Fig. 2 is the macro morphology of original DNA N powder columns (a) and modified DNAN powder columns (b)；And original DNA N powder columns fracture
The microscopic appearance in face (c) and the cladding DNAN powder column planes of disruption (d).
Specific implementation mode
The present invention is described in detail in the following with reference to the drawings and specific embodiments.
Embodiment 1
(1) configuration concentration is 1g/L trishydroxymethylaminomethanes (Tris) alkaline buffer solution；
(2) DNAN is placed in the solution of above-mentioned configuration, makes a concentration of 20g/L of the explosive in system, uses blender
It is stirred dispersion liquid, mixing time 5min with the rotating speed of 200r/min；
(3) Dopamine hydrochloride is placed in above-mentioned dispersion liquid, makes a concentration of 2g/L of the Dopamine hydrochloride in system, used
Blender is stirred dispersion liquid, mixing time 8h with the rotating speed of 300r/min；
(4) dispersion liquid that stirring is completed is subjected to suction filtration cleaning, made 3 times wash with distilled water；
(5) material after cleaning is placed in 3h in 80 DEG C of baking ovens, obtains the carrier explosive of surface modification；
(6) using above-mentioned modified DNAN as carrier, 60% RDX is added, castexplosive is made.
Embodiment 2
(1) configuration concentration is 1.5g/L trishydroxymethylaminomethanes (Tris) alkaline buffer solution；
(2) DNAN is placed in the solution of above-mentioned configuration, makes a concentration of 30g/L of the explosive in system, uses blender
It is stirred dispersion liquid, mixing time 8min with the rotating speed of 300r/min；
(3) Dopamine hydrochloride is placed in above-mentioned dispersion liquid, makes a concentration of 2.5g/L of the Dopamine hydrochloride in system, makes
Dispersion liquid, mixing time 12h are stirred with the rotating speed of 400r/min with blender；
(4) dispersion liquid that stirring is completed is subjected to suction filtration cleaning, made 3 times wash with distilled water；
(5) material after cleaning is placed in 3h in 80 DEG C of baking ovens, obtains the carrier explosive of surface modification；
(6) using above-mentioned modified DNAN as carrier, 50% NTO is added, castexplosive is made.
Embodiment 3
(1) configuration concentration is 1g/L trishydroxymethylaminomethanes (Tris) alkaline buffer solution；
(2) TNT is placed in the solution of above-mentioned configuration, makes a concentration of 20g/L of the explosive in system, using blender with
The rotating speed of 250r/min is stirred dispersion liquid, mixing time 5min；
(3) Dopamine hydrochloride is placed in above-mentioned dispersion liquid, makes a concentration of 3g/L of the Dopamine hydrochloride in system, used
Blender is stirred dispersion liquid, mixing time 12h with the rotating speed of 300r/min；
(4) dispersion liquid that stirring is completed is subjected to suction filtration cleaning, made 3 times wash with distilled water；
(5) material after cleaning is placed in 4h in 60 DEG C of baking ovens, obtains the carrier explosive of surface modification；
(6) using above-mentioned modified TNT as carrier, 60% RDX is added, castexplosive is made.
Embodiment 4
(1) configuration concentration is 1.5g/L trishydroxymethylaminomethanes (Tris) alkaline buffer solution；
(2) DNTF is placed in the solution of above-mentioned configuration, makes a concentration of 20g/L of the explosive in system, uses blender
It is stirred dispersion liquid, mixing time 5min with the rotating speed of 200r/min；
(3) Dopamine hydrochloride is placed in above-mentioned dispersion liquid, makes a concentration of 2.5g/L of the Dopamine hydrochloride in system, makes
Dispersion liquid, mixing time 8h are stirred with the rotating speed of 300r/min with blender；
(4) dispersion liquid that stirring is completed is subjected to suction filtration cleaning, made 3 times wash with distilled water；
(5) material after cleaning is placed in 4h in 60 DEG C of baking ovens, obtains the carrier explosive of surface modification；
(6) using above-mentioned modified DNTF as carrier, 60% HMX is added, castexplosive is made.
The mechanical property of the modification DNAN powder columns obtained in the specific embodiment of the invention 1 and 2 and original DNA N powder columns compares
As shown in table 1.
The mechanical property comparison of 1 original DNA N powder columns of table and modified DNAN powder columns
| Compressive strength/MPa | Brazilian cleavage strength/MPa | |
| Original DNA N powder columns | 4.78 | (too crisp, not obtain data) |
| Modified DNAN powder columns | 8.14 | 0.38 |
As can be seen that the compressive strength of original DNA N powder columns and cladding DNAN powder columns is respectively 4.78MPa, 8.14Mpa, packet
It covers DNAN powder columns and improves 70% than original DNA N powder columns；Original DNA N powder columns can not be processed to obtain Brazilian test sample due to too crisp
Product, cladding DNAN powder columns obtain Brazilian test sample since toughness improves processing, and it is 0.38MPa to measure its cleavage strength, with
Upper data illustrate that the cladding of PDA can significantly improve the mechanical property of DNAN base castexplosives.
Fig. 1 be DNAN planes of crystal before modified after particle surface microscopic topographic, modified DNAN crystal table as seen from the figure
Face has been uniformly distributed one layer of coating.
From Figure 2 it can be seen that powder column made of modified DNAN melting-solidifications is macroscopically still visibly homogeneous, show to wrap
Object is covered to be evenly distributed in explosive；Smooth layer structure is presented in the plane of disruption of original DNA N powder columns, and coats DNAN powder columns
The profile of the visible blasting explosive granules of the plane of disruption illustrates that the introducing of PDA makes the interfacial structure of explosive be changed.
Although reference be made herein to invention has been described for explanatory embodiment of the invention, and above-described embodiment is only this hair
Bright preferable embodiment, embodiment of the present invention are not limited by the above embodiments, it should be appreciated that people in the art
Member can be designed that a lot of other modification and implementations, these modifications and implementations will be fallen in principle disclosed in the present application
Within scope and spirit.
Claims (4)
1. a kind of method improving castexplosive mechanical property, it is characterised in that include the following steps：
Step 1: carrying out surface modification to carrier explosive by dopamine auto polymerization method；
Step 2: using modified explosive as carrier, suitable solid phase filler is added, castexplosive is made.
2. the method for improving castexplosive mechanical property according to claim 1, it is characterised in that：
The carrier explosive is TNT, DNAN or DNTF.
3. the method for improving castexplosive mechanical property according to claim 1, it is characterised in that：
In step 1, surface modification is carried out to carrier explosive, is as follows：
Step 1.1 configuration concentration is 0.1g/L~10g/L trishydroxymethylaminomethane alkaline buffer solutions；
Carrier explosive is placed in the solution of above-mentioned configuration by step 1.2, makes a concentration of 1g/L~100g/L of the explosive in system,
Dispersion liquid is stirred with the rotating speed of 100r/min~1000r/min using blender, mixing time is 5min~30min；
Dopamine hydrochloride is placed in above-mentioned dispersion liquid by step 1.3, make a concentration of 0.5g/L of the Dopamine hydrochloride in system~
50g/L is completely dissolved rear solution ph and still needs to be more than 7, stirred and mixed with the rotating speed of 100r/min~1000r/min using blender
Dispersion liquid is closed, mixing time is 1h~for 24 hours；
The dispersion liquid that stirring is completed is carried out suction filtration cleaning by step 1.4, is made 2~5 times wash with distilled water；
Material after cleaning is placed in 1h in 50 DEG C~80 DEG C baking ovens~for 24 hours by step 1.5, obtains the carrier explosive of surface modification.
4. the method for improving castexplosive mechanical property according to claim 1, it is characterised in that：
The solid phase filler is RDX, HMX or NTO, and the mass ratio shared by castexplosive is 10%~80%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810426320.1A CN108658710A (en) | 2018-05-07 | 2018-05-07 | A method of improving castexplosive mechanical property |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810426320.1A CN108658710A (en) | 2018-05-07 | 2018-05-07 | A method of improving castexplosive mechanical property |
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| CN108658710A true CN108658710A (en) | 2018-10-16 |
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| CN201810426320.1A Pending CN108658710A (en) | 2018-05-07 | 2018-05-07 | A method of improving castexplosive mechanical property |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109369315A (en) * | 2018-10-31 | 2019-02-22 | 中国工程物理研究院化工材料研究所 | A kind of hyperbranched high-intensitive compound containing energy |
| CN112110781A (en) * | 2020-09-22 | 2020-12-22 | 中国工程物理研究院化工材料研究所 | Method for enhancing mechanical property of fusion-cast explosive |
| CN113378250A (en) * | 2021-04-23 | 2021-09-10 | 中国兵器装备集团自动化研究所有限公司 | Parameter adaptation system for solidification molding of projectile fusion cast explosive and generation method |
| CN113666793A (en) * | 2021-07-28 | 2021-11-19 | 西安近代化学研究所 | Binary fusion cast explosive and additive preparation process |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996039122A1 (en) * | 1995-06-06 | 1996-12-12 | Marine Polymer Technologies, Inc. | POLY-β-1→4-N-ACETYLGLUCOSAMINE |
| 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 |
-
2018
- 2018-05-07 CN CN201810426320.1A patent/CN108658710A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996039122A1 (en) * | 1995-06-06 | 1996-12-12 | Marine Polymer Technologies, Inc. | POLY-β-1→4-N-ACETYLGLUCOSAMINE |
| 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 (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109369315A (en) * | 2018-10-31 | 2019-02-22 | 中国工程物理研究院化工材料研究所 | A kind of hyperbranched high-intensitive compound containing energy |
| CN109369315B (en) * | 2018-10-31 | 2020-08-14 | 中国工程物理研究院化工材料研究所 | Hyperbranched high-strength energetic compound |
| CN112110781A (en) * | 2020-09-22 | 2020-12-22 | 中国工程物理研究院化工材料研究所 | Method for enhancing mechanical property of fusion-cast explosive |
| CN113378250A (en) * | 2021-04-23 | 2021-09-10 | 中国兵器装备集团自动化研究所有限公司 | Parameter adaptation system for solidification molding of projectile fusion cast explosive and generation method |
| CN113378250B (en) * | 2021-04-23 | 2022-11-08 | 中国兵器装备集团自动化研究所有限公司 | Parameter adaptation system for solidification molding of projectile fusion cast explosive and generation method |
| CN113666793A (en) * | 2021-07-28 | 2021-11-19 | 西安近代化学研究所 | Binary fusion cast explosive and additive preparation process |
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Application publication date: 20181016 |
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