| Main results | Scientific contribution:
- Researched and fabricated GND nanocomposite materials with special features (heat resistance, high mechanical strength) from polyamide resin and at the same time does not affect the quality of the barrel during use. The polymer is modified to increase the cross-links in the molecular structure, and at the same time increase the proportion of crystalline components in the polymer molecular chain, and the crystallization density increases. This material can be easily manufactured from 60, 82 and 100 caliber mortar seals on injection molding equipment. Mortar gaskets 60 and 82 from GND nanocomposite materials have been evaluated for their physical, mechanical and thermal properties and tested directly 03 times at the TB1 shooting range, Military Zone 1, Bac Giang with the Minutes of A specialized unit under the Ministry of National Defense certifies that it is qualified.
- Successfully researched and fabricated high-performance PA610/NS/GF nanocomposite materials based on polyamide 610 with glass fiber reinforcement (GF) and nanosilica (NS) to meet the requirements of the details and parts in LA AAM with the following specifications: Tensile strength: 151.3 MPa; Charpy impact toughness: 30.2 MPa; Viscosity index: 125cm3/g; humidity: 0.2%; electrical endurance: 26.5 kV/mm.
- Successfully researched and fabricated polyethylene terephthalate insulating thin films with the same technical criteria as PET-E with a thickness of 50 μm according to GOST 24234-80 with the following technical characteristics: Thickness: 51.0 μm; Width: 201 mm; Appearance: Surface free of punctures, wrinkles, foreign bodies or stains; Relative elongation: 88.2%; Tear resistance: 251 N; Film shrinkage: 0.28%; Volumetric resistivity: At room temperature: 1.32x1014 Ω.m., in dry environment, 155ºC: 13.6x1011 Ω.m., when tested at room temperature after keeping in a humid environment at room temperature. room for 24 hours: 2.95x1012 Ω.m; Electrical endurance under ac voltage frequency 50 Hz: At room temperature: 205.9 kV/mm, when tested at room temperature after keeping in a humid environment at room temperature for 24 h: 162.7 kV/mm.
- Successfully researched and fabricated polyester resin from dimethyl terephthalate (DMT), sebasic acid (SbA) and ethylene glycol (EG) with technical criteria equivalent to glue grade TФ-60 according to ТУ 6-05-211-895 -79 as follows: completely soluble in methylene chloride solvent, melting point 166°C, thermal stability of glue line 110ºC, strength of glue line when gluing PET film = 85% of strength of PET film.
- Establishment of technological processes to fabricate Alnico hard magnetic materials which meet the requirements of manufacturing hard magnetic details in short range air defense missiles.
- Establishment of technological processes to fabricate workpieces with the size and magnetic parameters as the standard samples, meeting the requirements for manufacturing magnets in short range air defense missiles.
- Published 03 scientific papers in the National Conference Procceedings; submited 02 patents; trained 01 Master and 01 Engineer.
- The scratch-resistant additives have been studied and the nano-silica dispersed in the organosilica matrix, PMHS was selected. Nano-silica was preferredly functionalized by CTMS 10% agent for 2 hours.
- The project has developed the technology process to manufacture scratch-resistant, hydrophobic materials and corresponding coatings for optical instruments. The resulting product was a mixed solution of nano-silica dispersed in PMHS/Petroleum ether.
- The project has developed the relevant coating technique applied for the nano-silica dispersed in PMHS/Petroleum ether solution. Those techniques can be categorized as manual coating (general optical glass) and spin coating (flat and optical glass).
- The product, nano-silica dispersed in PMHS/Petroleum ether solution, has been tested in the Z199 military factory. The test showed that the resulting coating on the optical glass had good quality in terms of scratch-resistant (8H on the pencil scale), hydrophobic (contact angle of 110°), and optical transmittance of 99%. The coated optical lenses functioned well, on par with the original lenses.
Applied results:
- Every year, the production units of the Ministry of Defense produce a large number of mortar shells of all kinds to supply to combat units. Mortar gaskets manufactured from GND composite resin have been through the process of testing, trial production, laboratory evaluation and actual test firing for good results. Currently, the production units of the Ministry of Defense have a high demand for this special material and there are new proposals on technical criteria according to the development trend of modern weapons. In 2022, the Center for High Technology Development has received official dispatches from specialized units under the Ministry of National Defense requesting coordination and supply of GND nanocomposite materials, the Center has signed a contract to supply this type of material. to manufacture mortar gaskets of caliber 60 and 82, and in the near future will provide materials to manufacture mortar gaskets 100.
- PA610/NS/GF nanocomposite material (PA610 composite plastic) can be used to manufacture some details in LA AAM such as launch tube sensor body, crank mechanism assembly, socket assembly, jack assembly, .. During the implementation of the project component, the composite PA610 plastic material was used to test launch tube sensor body products at Z129 Factory, General Department of Defense Industry. The launch tube sensor body product is made from 2 types of PA610 composite plastic M1 and M3, the technical specifications are checked (according to the technological process of manufacturing the sensor body, symbol 939.080.QT of the manufacturer. machine Z129) results are similar to products manufactured by Factory Z129 from imported materials.
- The polyethylene terephthalate insulating thin product of the Project Component was used to manufacture the dose shell (including the cap and the primer body) of the LA AAM cruise engine. The product meets the criteria of testing, inspecting and evaluating products according to the currently used plan of the General Department of Defense Industry. The product after being glued with Polyester plastic has been tested according to the process at Factory Z121/General Department of Defense Industry. The test results show that: after gluing the dose shell to the body of the cruise engine primer, the glue line is firm, there is no phenomenon of layer separation and air bubbles, the moisture resistance test, the thermal shock test is satisfactory, the quality is satisfactory. equivalent quantity to similar Russian products in use.
- The glue based on polyester resin is provided in the form of pellets, the melting point is usually around 170-190oC and the crystallization rate is very fast. Research shows that the adhesion quality is very good when gluing plastic to metal, metal to metal and plastic to plastic. Especially, the dose shell has been glued to the body of the polyester cruise engine primer in the quantity of 8 sets. Test results according to the process at Factory Z121/General Department of Defense Industry showed that: after gluing the dose shell to the body of the cruise engine primer, the glue line is firm, there is no phenomenon of layer separation and air bubbles. Heat and humidity test, thermal shock test meet the requirements, the quality istra similar Russian products in use.
- Using fabricated Alnico hard magnetic materials to produce hard magnetic components in self-guided head (magnetic mirror), detonator, turbine generator and angular speed sensor of short range air defense missiles.
- The project has manufactured the nano-silica dispersed in PMHS/Petroleum ether solution which can be able to coat optical glass in military optical instruments. The coating film enhances the scratch-resistant and hydrophobic capabilities and meets demanding standards in optics.
- The product can be widely applied to other glass products in civil industries. |
| Novelty and actuality and scientific meaningfulness of the results | - Researched the selection of the base resin, determined the main technical parameters affecting the thermal stability, mechanical strength and friction reduction for 82 screw and smooth barrel mortar gaskets. - Researched to modify the base resin using suitable additives to increase the cross-links in the structure of the molecule, and at the same time increase the proportion of components with crystalline structure in the polymer molecular chain. - Researched and developed technology to manufacture new materials with both high thermal stability and high mechanical properties. This is a hybrid composite material that attracts much scientific attention. This material will combine the advantages of reinforcing agents (fiberglass-GF, nannosilica-NS,...) in the PA610 resin. PA610/NS/GF materials have superior mechanical and thermal properties compared to PA610/NS materials. The glass fiber content suitable for reinforcing PA610/NS is 30%. At this content, the mechanical properties of the material reached the highest value (the breaking strength increased by about 91.57%) and the thermal stability of the material was significantly improved (the decomposition temperature increased by 38.29oC) compared with PA610/NS material. - The technological process for manufacturing polyethylene terephthalate insulating thin films has been developed in accordance with domestic equipment conditions. The polyethylene terephthalate insulating thin film manufactured by the process meets the specifications equivalent to PET-E 50 μm thick PET film according to GOST 24234-80. - For the first time, polyester resin can be manufactured (reaching the technical criteria equivalent to glue grade ТФ-60 according to TU 6-05-211-895-79) and being fully proactive in terms of polyester resin production technology. meeting the requirements of gluing the cap to the body of the cruise engine primer of LA AAM in Vietnamese conditions, replacing imported products of the same type. - Establishment of technological processes to fabricate Alnico hard magnetic materials with magnetic parameters meeting requirements for applications in short range air defense missiles. - Researched and developed a technological process to create scratch-resistant, hydrophobic coating materials for optical devices from precursor materials available on the market, especially successfully synthesized spherical nanosilica with with high uniform particle size, successfully modified spherical nanosilica system with dispersive ability, which is very compatible with the film coating system for glass. The conditions of composition have been optimized, including: ratio of PMHS: kerosene ether (mL) = 2.5:100, NaOH catalyst concentration suitable for the reaction is about 0.03 - 0.05 N, function the amount of spherical nanosilica added about 0.2 - 0.25 % by mass of PMHS; and material manufacturing technology conditions with stirring time of 60 minutes, stirring speed in the range of 500 ÷ 800 rpm. The obtained products have good technical specifications to ensure the application of scratch-resistant films for optical devices and other optical glasses. |
| Products of the project | Scientific papers in referred national journals (list):
- Nguyen Van Thao, Hoang Thi Thu Linh, Vu Ngoc Doan, Nguyen The Huu, Nguyen Minh Viet, Le Duy Binh, Research on synthesis of poly(ethylene terephthalate-co-ethylene sebacate) copolyester, Journal of Military Science and Technology Research, Numbers 71, 98-103, 2021.
- Vu Ngoc Duy, Nguyen Tuan Hong, Nguyen Van Thao, Nguyen Xuan Anh, Dao Van Chuong, Le Van Long, Nguyen Van Tu, Nguyen The Huu, Manufacturing glue based on poly(ethylene terephthalate-co-ethylene sebacat) copolyester, Journal of Military Science and Technology Research, No. 73, 138-144, 2021.
- Pham The Long, Le Hoang Thanh, Hoang Thi Huong Thuy, Le Thi Thuy Hang, Nguyen The Huu, Luong Nhu Hai, Research on the influence of nanosilica additives on the mechanical and thermal properties of PA610 resin, Science Journal and Technology, Hanoi University of Industry (Certificate of Acceptance).
- Hoang Thi Huong Thuy, Le Hoang Thanh, Le Thi Thuy Hang, Luong Nhu Hai, Nguyen Van Thao, Effect of glass fiber on some properties of PA610/nanosilica composite, Science Journal of Hong Duc University (Certificate of acceptance of posting).
- Le Minh Tri, Nguyen Dinh Dung, Vu Duy Dat, Nguyen The Huu, Vu Trong Phuc, Nguyen Van Tu, Phan Ngoc Hong, Nguyen Tuan Hong, Research and fabrication of spherical SiO2 nanoparticle applied in optical coating films, Journal Journal of Military Science and Technology Research, No. 77, 86 - 90, 2022.
- Pham Thi Mai Huong, Nguyen Van Manh, Dao Xuan Phuc, Nguyen Trung Toan, Do Nhat Minh, Nguyen Xuan Anh, Dang Thanh Binh, Nguyen Tuan Hong, Research on denaturing SiO2 nano with alkylsilane agent applied in coating film glass background, Military Science and Technology Research Journal, No. 78, 108 - 113, 2022.
Presentation (National conference)
- Pham Thi Thanh, Nguyen Huy Ngoc, Kieu Xuan Hau, Truong Viet Anh, Nguyen Hai Yen, Dao Son Lam, Pham Van Dai, Tran Dang Thanh, Luong Van Duong, Nguyen Van Thao, Phan Ngoc Hong, Nguyen Huy Dan, Research Fabrication of Alnico hard magnetic materials by powder metallurgy method, Collection of reports of 12th Conference of Solid State Physics and Materials Science 12th SPMS 2021, 36-39.
- Truong Viet Anh, Dang Quoc Khanh, Luong Van Duong, Tran Bao Trung, Le Danh Chung, Nguyen Van Toan, Nguyen Huy Ngoc, Pham Thi Thanh, Nguyen Hai Yen, Kieu Xuan Hau, Nguyen Huy Dan, Research and manufacture of materials Alnico hard magnetic data by SPS method, Proceedings of the 12th Conference on Solid State Physics and Materials Science, 2021 SPMS, 40-43.
- Nguyen Huy Ngoc, Pham Thi Thanh, Kieu Xuan Hau, Nguyen Hai Yen, Dao Son Lam, Pham Van Dai, Tran Dang Thanh, Luong Van Duong, Truong Viet Anh, Nguyen Van Thao, Phan Ngoc Hong, Nguyen Huy Dan, Research on fabrication of Alnico hard magnetic materials by casting method, Collection of reports from 12th SPMS Conference on Solid State Physics and Materials Science 2021, 44-48.
Patents (list):
- 01 patent registration: Method for making glue based on poly(ethylene terephthalate-co-ethylene sebacat) copolyester (A valid application has been accepted by the National Office of Intellectual Property under Decision No 11321w/QD-SHTT, 6/7/2022).
- 01 patent registration: Process of manufacturing anisotropic Alnico hard magnetic materials by casting method (A valid application has been accepted by the National Office of Intellectual Property under Decision No. 14800w/QD-SHTT, 24/9/2021).
- 01 patent registration: Alnico hard magnetic material with high residual magnetic induction and manufacturing method of this material, edited and sent back to the National Office of Intellectual Property.
- 01 patent registration: Method for making oil-loving SiO2 nanomaterials and lipophilic SiO2 nano-materials created by this method (A valid application has been accepted by the National Office of Intellectual Property under Decision No. 11560w/ QD-SHTT, 11/07/2022).
Technological products (describe in details: technical characteristics, place): 1. Composite materials based on polyamide 610 (Plastic HTD.QP3.1-TCB.M3)
2. Launch tube sensor body of LA AAM
3. Polyamide plastic materials meet the technical criteria used to manufacture mortar seals (Plastic HTD.QP3.1-GND11)
4. Mortar gasket
5. Polyethylene terephthalate insulating thin film (Film HTD.QP3.1-MPETE)
6. Dose shell of LA AAM cruise motor priming housing made from polyethylene terephthalate insulating thin film
7. Polyester resin (Keo HTD.QP3.1-KDVLM)
8. Attach the cap to the body of the polyester cruise engine primer shell
9. AlNiCo-X hard magnetic material in self-conducting head (HTD.QP3.2-Alnico-GT)
10. AlNiCo-X hard magnetic material applied in detonator sensor (HTD.QP3.2-Alnico-CBNN)
11. AlNiCo-X hard magnetic material used in cockpit turbine generator (HTD.QP3.2-Alnico-MPTBKL)
12. AlNiCo-X hard magnetic material applied in angular speed sensor (HTD.QP3.2-Alnico-CBTĐG)
13. Magnetic mirror embryos for self-guided heads
14. Hard magnetic detail workpiece for fuse sensor
15. Hard magnetic workpiece for cockpit turbine generator
16. Hard magnetic workpiece for angular speed sensor
17. Scratch-resistant, hydrophobic optical-glass coating solution (functioning in the visible light region) for optical instruments, applied in storage, training, and standby according to standard TU-224500-01-2000.
(HTD.QP3.3-CXKN)
18. Optical glass coated by the product solution; 3 sets:
+ Objective, eyepiece (8x30 mm binoculars)
+ Objectives, eyepieces (binoculars 15x50 mm)
+ Protective eyepiece, eyepiece (Viewfinder PGO-7V) Technological-process document:
- Technological process for manufacturing composite materials based on polyamide 610 (reaching technical criteria equivalent to PA610-L-SV30 according to TU 6-06-134-90).
- Technological process for manufacturing polyethylene terephthalate insulating thin film (reaching technical criteria equivalent to PET-E mark of 50 μm thickness according to GOST 24234-80).
- Technological process of manufacturing polyester resin (reaching technical criteria equivalent to glue grade ТФ-60 according to TU 6-05-211-895-79).
- The technological process of manufacturing polyamide plastic materials meets the technical criteria used to manufacture mortar seals.
- 04 technological processes for manufacturing materials: Technological process for manufacturing AlNiCo-X hard magnetic materials applied in the self-guided head of low-range anti-aircraft missiles; The technological process of making AlNiCo-X hard magnetic materials applied in the detonation sensor of low-range anti-aircraft missiles; Technological process for making AlNiCo-X hard magnetic materials applied in the cockpit turbine generator of low-altitude anti-aircraft missiles; The technological process of manufacturing AlNiCo-X hard magnetic materials applied in the angular speed sensor of low-range anti-aircraft missiles.
- 04 technological processes for making embryos: Technological process for manufacturing mirror embryos from the self-guided head of low-range anti-aircraft missiles; Technological process for making detailed hard magnetic workpieces in detonators of low-range anti-aircraft missiles; Technological process for making detailed hard-magnetic workpieces in the cockpit turbine generator of low-altitude anti-aircraft missiles; Technological process for making detailed hard magnetic workpieces in angular speed sensors of low-altitude anti-aircraft missiles.
- Technological process for manufacturing nano-silica dispersed in PMHS/Petroleum ether solution which produces scratch-resistant, hydrophobic coating for optical glass.
Technological process of coating optical glass using nano-silica dispersed in PMHS/Petroleum ether solution.
Testing report:
- Minutes of testing and evaluating technical features of materials and research products of the project component.
- Report on evaluation results of controlled trials of scratch-resistant, hydrophobic coating solutions and some commercial products.
Other products (if applicable): Contributing to training 04 masters and 01 engineer:
- Master Nguyen Thi Minh Nguyet defended her Master's Thesis in Analytical Chemistry "Analysis of physicochemical characteristics of polyethylene terephatalate and PET film" at the University of Science, Thai Nguyen University. Instructor: Assoc.Prof.Dr. Pham The Chinh, Dr. Dao The Nam.
- Master Le Hoang Thanh defended the Master's Thesis in Organic Chemistry "Research on improving thermal stability of polyamide resin-based polymer composite materials" at Hong Duc University. Instructor: Dr. Hoang Thi Huong Thuy, Dr. Luong Nhu Hai.
- Master Nguyen Huy Ngoc defended the Master's Thesis in Electronic Materials Science "Research on technology for manufacturing Alnico hard magnetic materials" at the Academy of Science and Technology. Instructor: Prof. Dr. Nguyen Huy Dan.
- Engineer Truong Viet Anh successfully defended the Graduation Project in Materials Engineering "Research and fabrication of Alnico hard magnetic materials by plasma electric pulse sintering method" at Hanoi University of Science and Technology. Instructor: Dr. Dang Quoc Khanh, Prof. Dr. Nguyen Huy Dan.
- Master Vu Trong Phuc defended the Master's Thesis in Chemical Engineering "Research on fabrication and modification of SiO2 nano in hydrophobic coating film on glass substrate" at Hanoi University of Industry. Instructor: Dr. Dang Huu Trung, Assoc.Prof.Dr. Nguyen The Huu. |
