Ministry of Science and Technology, Vietnam最新文献_第10页

Nutritional effects on biomass and metabolic products by Aurantiochytrium sp. 营养对 Aurantiochytrium sp.

Ministry of Science and Technology, Vietnam Pub Date : 2023-12-15 DOI: 10.31276/vjste.65(4).94-100

Pham Thi Hai Mien, Dao Viet Ha, Cornelis Verduyn

{"title":"Nutritional effects on biomass and metabolic products by Aurantiochytrium sp.","authors":"Pham Thi Hai Mien, Dao Viet Ha, Cornelis Verduyn","doi":"10.31276/vjste.65(4).94-100","DOIUrl":"https://doi.org/10.31276/vjste.65(4).94-100","url":null,"abstract":"Docosahexaenoic acid, or Docosahexaenoic acid (DHA), plays a pivotal role in biological functions and is beneficial for both humans and animals. Traditionally, DHA is sourced from fish and fish oil. Due to the disadvantages associated with these sources, such as marine pollution and variable composition, there is a pressing need to explore alternative, reliable sources for DHA. Aurantiochytrium sp. has been identified as a promising candidate for DHA production. The primary aim of this study was to cultivate three strains in previously published media and, subsequently, to develop defined or semi-defined media for Aurantiochytrium sp.. These strains were grown in the selected media, and the dry weight of the cells was measured. Total fatty acids were extracted and analysed using gas chromatography. All three strains demonstrated satisfactory growth in media that incorporated glucose as a carbon source and monosodium glutamate as a nitrogen source. Strain B072 achieved the highest DHA concentration, with a peak of 5.0 g/l, and could accumulate lipids up to 57.57% (w/w). The DHA content in the biomass was 21.43% (w/w), with a biomass yield of 23.35 g/l. Vitamins and trace elements positively influenced the growth and DHA production of Aurantiochytrium sp.. Furthermore, strain B072 efficiently utilised ammonium for growth and fatty acid production.","PeriodicalId":18650,"journal":{"name":"Ministry of Science and Technology, Vietnam","volume":"122 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138997513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Chitosan oligomer/silver nanoparticles/PCL composite electrospun membrane for severe burn wound healing 壳聚糖低聚物/银纳米粒子/PCL 复合电纺丝膜用于严重烧伤创面愈合

Ministry of Science and Technology, Vietnam Pub Date : 2023-12-15 DOI: 10.31276/vjste.65(4).62-70

Anh Mai Que, Tuan Ngan Tang, Tam Phan Thi Thanh, Thanh Tu Duong, Thanh Binh Vu, Van Khiem Nguyen, Hoan Ngoc Doan, Hiep Thi Nguyen

{"title":"Chitosan oligomer/silver nanoparticles/PCL composite electrospun membrane for severe burn wound healing","authors":"Anh Mai Que, Tuan Ngan Tang, Tam Phan Thi Thanh, Thanh Tu Duong, Thanh Binh Vu, Van Khiem Nguyen, Hoan Ngoc Doan, Hiep Thi Nguyen","doi":"10.31276/vjste.65(4).62-70","DOIUrl":"https://doi.org/10.31276/vjste.65(4).62-70","url":null,"abstract":"In the management of burn wounds, antimicrobial and wound healing properties are crucial. In this study, we prepared a three-layer electrospun poly(ε-caprolactone) (PCL) membrane for burn wound dressing. The hydrophobic electrospun PCL layer, embedded with silver nanoparticles (SNPs) (PCL-Ag), was coated with another layer of electrospun plasma-treated PCL-Ag to enhance the wettability of the membrane. This enhancement was to facilitate the absorption of the hydrophilic chitosan oligomer (COS) - the third layer of the dressing. The resultant membranes were characterised and tested for different properties to demonstrate their applicability as wound dressing materials. The combination of COS and SNPs of the fabricated membrane supports the healing process and reduces burn severity due to the healing capacity of COS and the antibacterial activity of SNPs, without compromising mechanical strength. We conducted several in vitro and in vivo experiments to evaluate its applicability for burn wound healing. The PCL-Ag/COS sample demonstrated outstanding in vitro biocompatibility and excellent antibacterial activity against Staphylococcus aureus strains. We used the membrane to treat burns on rabbits in the laboratory over 30 days, and consistently observed positive outcomes. This research offers insights into the development of bioactive dressings for wound healing and opens up opportunities for practical applications of COS-incorporated materials.","PeriodicalId":18650,"journal":{"name":"Ministry of Science and Technology, Vietnam","volume":"72 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138998070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrochemical synthesis of conjugated copolymer poly(3-hexylthiophene-co-dithenopyrrole): Stepwise approach to enhance electro-optical properties 共轭共聚物聚(3-己基噻吩-共二苯基吡咯)的电化学合成：逐步提高电光特性的方法

Ministry of Science and Technology, Vietnam Pub Date : 2023-12-15 DOI: 10.31276/vjste.65(4).29-35

Thao Phuong Le Nguyen, Cam Hong Thi Nguyen, T. H. Luu, T. Truong, B. Doan, T. Nguyen, H. T. Nguyen

{"title":"Electrochemical synthesis of conjugated copolymer poly(3-hexylthiophene-co-dithenopyrrole): Stepwise approach to enhance electro-optical properties","authors":"Thao Phuong Le Nguyen, Cam Hong Thi Nguyen, T. H. Luu, T. Truong, B. Doan, T. Nguyen, H. T. Nguyen","doi":"10.31276/vjste.65(4).29-35","DOIUrl":"https://doi.org/10.31276/vjste.65(4).29-35","url":null,"abstract":"Electrochemical polymerisation of 3-hexylthiophene (3HT) and electrochemical copolymerisation of 3HT and N-benzoyl dithienopyrrole (BDP) were performed to prepare polymer and copolymer films using a linear sweep voltammetry potentiostatic technique with a voltage range from 1.7-1.8 V and a scan rate of 0.1 mV/s. Cyclic voltammetry (CV) curves, Fourier-transform infrared (FTIR) spectra, scanning electron microscope (SEM) images, and UV-Vis absorption spectra of the polymer and copolymer were recorded for analysis and comparison of the electropolymerisation process and properties of the resultant films. The SEM photographs of the copolymer base on 3HT and BDP exhibited a rigid structure with large spherical aggregates with an average size around 200 nm. The copolymer of 3HT and BDP exhibited the band gaps of 2.25 eV which was determined via electrochemical measurement that is higher than of band gaps of homopolymer poly(3-hexylthiophene) (P3HT). The copolymer’s energy bandgap HOMO-LUMO was enhanced compared to polymer P3HT. Moreover, the increased conjugation length significantly improved the morphology structure as well as the electrochemical stability of the conjugated copolymer.","PeriodicalId":18650,"journal":{"name":"Ministry of Science and Technology, Vietnam","volume":"9 13","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138970642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Motion planning and control of an autonomous mobile robot 自主移动机器人的运动规划与控制

Ministry of Science and Technology, Vietnam Pub Date : 2023-12-15 DOI: 10.31276/vjste.65(4).03-10

To Xuan Dinh, Nguyen Thi Thu Huong, Nguyen Ngoc Tuan, Nguyen Thanh Tien

{"title":"Motion planning and control of an autonomous mobile robot","authors":"To Xuan Dinh, Nguyen Thi Thu Huong, Nguyen Ngoc Tuan, Nguyen Thanh Tien","doi":"10.31276/vjste.65(4).03-10","DOIUrl":"https://doi.org/10.31276/vjste.65(4).03-10","url":null,"abstract":"The application of autonomous mobile robots (AMRs) has gradually become crucial in smart factories due to the advantages of improving production efficiency and reducing labour costs. Motion planning has been a key part of AMR control development. This paper presents motion planning and position tracking control systems of an omnidirectional wheel AMR powered by a hybrid fuel cell and battery power source. First, the kinematical and dynamic models of the AMR are introduced. The navigation system comprises three loops, with the first loop being motor control, the second loop being position tracking control, and a motion planning layer. The position data of the AMR for feedback control is obtained through sensor fusion of data from the inertial measurement unit (IMU) sensor, encoder sensor, and ranging sensor with simultaneous localisation and mapping (SLAM) algorithm. The motion planning is then applied to obtain an optimal path with the shortest distance and collision-free movement. In addition, the tracking algorithm is designed to drive the AMR to follow the optimal path and achieve high accuracy. The experimental results show a 30% improvement in tracking accuracy compared to traditional approaches and 8 hours of continuous working, which is promising for industrial applications, and the results are satisfactory in terms of both accuracy and efficiency requirements.","PeriodicalId":18650,"journal":{"name":"Ministry of Science and Technology, Vietnam","volume":"82 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138996280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Advanced magnetocaloric microwires: What does the future hold? 先进的磁性微丝：未来会怎样？

Ministry of Science and Technology, Vietnam Pub Date : 2023-12-14 DOI: 10.31276/VJSTE.65(4).14-24

Hong-Xian Shen, N.T.M. Duc, H. Belliveau, Lin Luo, Yunfei Wang, Jian-Fei Sun, Faxiang Qin, M. Phan

{"title":"Advanced magnetocaloric microwires: What does the future hold?","authors":"Hong-Xian Shen, N.T.M. Duc, H. Belliveau, Lin Luo, Yunfei Wang, Jian-Fei Sun, Faxiang Qin, M. Phan","doi":"10.31276/VJSTE.65(4).14-24","DOIUrl":"https://doi.org/10.31276/VJSTE.65(4).14-24","url":null,"abstract":"Magnetic refrigeration (MR) based on the magnetocaloric effect (MCE) is a promising alternative to conventional vapor compression refrigeration techniques. The cooling efficiency of a magnetic refrigerator depends on its refrigeration capacity and operation frequency. Existing refrigerators possess limited cooling efficiency due to the low operating frequency (around tens of Hz). Theory predicts that reducing geometrical effects can increase the operation frequency by reducing the relaxation time of a magnetic material. As compared to other shapes, magnetocaloric wires transfer heat most effectively to a surrounding environment, due to their enhanced surface area. The wire shape also yields a good mechanical response, reducing the relaxation time and consequently increasing the operation frequency of the cooling device. Experiments have validated the theoretical predictions. By assembling microwires with different magnetocaloric properties and Curie temperatures into a laminate structure, a table-like magnetocaloric bed can be created and used as an active cooling device for micro-electro-mechanical system (MEMS) and nano-electro-mechanical system (NEMS). This paper assesses recent progress in the development of magnetocaloric microwires and sheds light on the important factors affecting the magnetocaloric behavior and cooling efficiency in microwire systems. Challenges, opportunities, and strategies regarding the development of advanced magnetocaloric microwires are also discussed.","PeriodicalId":18650,"journal":{"name":"Ministry of Science and Technology, Vietnam","volume":"13 17","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139001319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

One-dimensional numerical model of landslide over high-steep slopes: Theory and verification to the analytical solution 高陡边坡滑坡的一维数值模型：理论和对解析解的验证

Ministry of Science and Technology, Vietnam Pub Date : 2023-11-25 DOI: 10.31276/vjst.65(11).42-46

Van Khoi Pham, V. N. Vu

{"title":"One-dimensional numerical model of landslide over high-steep slopes: Theory and verification to the analytical solution","authors":"Van Khoi Pham, V. N. Vu","doi":"10.31276/vjst.65(11).42-46","DOIUrl":"https://doi.org/10.31276/vjst.65(11).42-46","url":null,"abstract":"At the steep slope areas, landslide events may suddenly occur due to prolonged heavy rain and seriously affect humans’ lives and their properties. Numerical models simulating landslides help us to predict the real landslide phenomenon effectively because they are not only time-saving compared to physical models but also acceptable accuracy. In this paper, the one-dimensional nonlinear shallow water equations using the global coordinate system are established as the proposed model governing equations. The hybrid finite difference-finite volume method, the implicit method and the automatical time step controlling technique are employed to stably simulate the landslide events over the high-steep slopes. To validate the proposed numerical model to the analytical solution, authors continuously derive the non-dimensional governing equations in one dimension as well as using the global coordinate system. The numerical results are in good agreement with the analytical solution. The proposed numerical model can be used to simulate the landslides and the landslide-induced tsunami events, especially for simulating the high-steep slope conditions.","PeriodicalId":18650,"journal":{"name":"Ministry of Science and Technology, Vietnam","volume":"42 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139238004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Graphene thermally modified with polyvinyl alcohol applied as conductive water-based paints based on polyurethane 聚乙烯醇热修饰石墨烯用作基于聚氨酯的导电水基涂料

Ministry of Science and Technology, Vietnam Pub Date : 2023-11-25 DOI: 10.31276/vjst.65(11).37-41

Ngoc Diep Le, Thi Kim Oanh Nguyen, Ho Phuong Thao Le, Duy Linh Nguyen, M. Dang, D. Doan

{"title":"Graphene thermally modified with polyvinyl alcohol applied as conductive water-based paints based on polyurethane","authors":"Ngoc Diep Le, Thi Kim Oanh Nguyen, Ho Phuong Thao Le, Duy Linh Nguyen, M. Dang, D. Doan","doi":"10.31276/vjst.65(11).37-41","DOIUrl":"https://doi.org/10.31276/vjst.65(11).37-41","url":null,"abstract":"This paper presents the fabrication of thermally reduced graphene modified with polyvinyl alcohol (PVA), which can be used as a conductive water-based paint based on polyurethane (PU). Graphite oxide (GO) was oxidised from graphite by the Hummer method, and then graphene was formed by the thermal-reducing GO method. The graphene was modified by dispersing it into a PVA solution with various concentrations and mass ratios to optimise the modification process. The graphene modified with PVA could be easily dispersed in water. Water-borne PU film-forming polymer was prepared by polymerisation reaction between isophorone diisocyanate with poly(tetramethylene glycol) and dimethylolpropionic acid. The carboxylate functional groups on the surface of the polymer particles make the polymer particles dispersed well and stable in water, so this polymerisation process does not use any surfactants. The characterisation methods included field emission scanning electron microscope with energy-dispersive X-ray spectroscopy (FESEM-EDX), specific surface area measurement, Raman microspectroscopy, resistance measurement... The graphene-based conductive paint has good adhesion, conductivity of the dry paint film was from 0.1-4 mS/cm with graphene content in the dry paint film was about 5-10 wt%.","PeriodicalId":18650,"journal":{"name":"Ministry of Science and Technology, Vietnam","volume":"394 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139236740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characteristics of iron-manganese nodules containing nickel and cobalt in chromite deposits in Co Dinh, Thanh Hoa province 清化省高定铬铁矿床中含镍和钴的铁锰结核的特征

Ministry of Science and Technology, Vietnam Pub Date : 2023-11-25 DOI: 10.31276/vjst.65(11).23-31

Tien Dung Le, Van Duc Tran, Huu Trong Nguyen, Khac Giang Nguyen, Xuan Ban To, Thi Ly Ly Nguyen

{"title":"Characteristics of iron-manganese nodules containing nickel and cobalt in chromite deposits in Co Dinh, Thanh Hoa province","authors":"Tien Dung Le, Van Duc Tran, Huu Trong Nguyen, Khac Giang Nguyen, Xuan Ban To, Thi Ly Ly Nguyen","doi":"10.31276/vjst.65(11).23-31","DOIUrl":"https://doi.org/10.31276/vjst.65(11).23-31","url":null,"abstract":"Along with the chromite ore bodies, very early on, geologists recorded the presence of cobalt (Co) and nickel (Ni) metal. The resource of cobalt and nickel is forecasted with over 3 million tons of Ni and over 260 thousand tons of Co metals. Until now, however, knowledge about the existence form and distribution of Ni and Co in chromite ore bodies is very limited. Researching the sludge in the chromite mines and in comparison with manganese nodules found in the ocean floor helps to detect the presence of particles of iron and manganese (Fe-Mn nodules) in granular sewage sludges and in primary chromite ore bodies. Fe-Mn hydroxides, including todorokite mineral, are believed to be the adsorption medium and forming of Ni and Co in the Co Dinh placer chromite. Determining the existence form and distribution of Ni and Co in chromite placer deposits has scientific and practical significance in sampling orientation, sample processing, geological exploration, and reserve and resource estimations, sorting and recovering technology of Co and Ni metals.","PeriodicalId":18650,"journal":{"name":"Ministry of Science and Technology, Vietnam","volume":"34 38","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139237120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of the Ce3+ concentration on the crystallite structure and optical properties of ZnO nanomaterials synthesised by sol-gel method Ce3+ 浓度对溶胶-凝胶法合成的氧化锌纳米材料晶粒结构和光学特性的影响

Ministry of Science and Technology, Vietnam Pub Date : 2023-11-25 DOI: 10.31276/vjst.65(11).63-68

Thi Bich Hop Dang, Van Cuong Nguyen, Quoc Thuan Hoang, Tien Ha Le, Van Quang Nguyen, Thi Lan Huong Pham

{"title":"Effect of the Ce3+ concentration on the crystallite structure and optical properties of ZnO nanomaterials synthesised by sol-gel method","authors":"Thi Bich Hop Dang, Van Cuong Nguyen, Quoc Thuan Hoang, Tien Ha Le, Van Quang Nguyen, Thi Lan Huong Pham","doi":"10.31276/vjst.65(11).63-68","DOIUrl":"https://doi.org/10.31276/vjst.65(11).63-68","url":null,"abstract":"In this study, Ce3+-doped ZnO nanomaterials (Zn1-xO:xCe3+ NPs) were synthesised using the sol-gel method. X-ray diffraction (XRD) pattern and Raman spectra analysis showed that at 1% doping concentration, Zn2+ ions were replaced with Ce3+ ions in the ZnO lattice. However, at higher concentrations (3 and 5%), the CeO2 phase was formed, preventing the diffusion process of Ce3+ ions into the lattice. Field emission scanning electron microscopy (FESEM) images showed that the obtained material had a particle size of several tens of nanometers. X-ray energy dispersive (EDS) spectroscopy and EDS mapping spectra revealed that the synthesised Zn1-xO:xCe3+ NPs had high purity and the Ce element was uniformly distributed in the sample. UV-Vis spectroscopy confirmed the strong interaction between Ce3+ ions and ZnO lattice, leading to increased light absorption in the visible region. The photoluminescence (PL) spectrum of ZnO showed two emission regions peaking at 389 and 650 nm, attributed to band to band recombination and defect types of ZnO such as oxygen vacancy (Vo) and/or oxygen interstitial (Oi), respectively. In comparison with ZnO, the PL spectrum of Zn1-xOx:Ce3+ (x=1-5) samples showed that the visible region emission appeared at new peak at 580 nm originating to the 3d → 4f transition of Ce3+ ions. As the doping concentration increased gradually from 1 to 5%, the 580 nm peak intensity increased, and the 389 peak intensity decreased significantly, indicating that Ce3+ ions inhibited the NBE recombination process of ZnO. This study suggested that Ce3+ doped ZnO NPs have a great potential for application in visible-light photocatalysis.","PeriodicalId":18650,"journal":{"name":"Ministry of Science and Technology, Vietnam","volume":"23 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139237906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on the influence of some factors on the high burning rate of energy-carrying materials based on acrylonitrile butadiene rubber with end-chain carboxyl group 研究某些因素对带有端链羧基的丙烯腈丁二烯橡胶载能材料高燃烧率的影响

Ministry of Science and Technology, Vietnam Pub Date : 2023-11-25 DOI: 10.31276/vjst.65(11).06-10

Duc-Long Nguyen, Van Hung Nguyen, Huu-Thanh Tran, Van Diep Doan, Van Hung Hoang

{"title":"Study on the influence of some factors on the high burning rate of energy-carrying materials based on acrylonitrile butadiene rubber with end-chain carboxyl group","authors":"Duc-Long Nguyen, Van Hung Nguyen, Huu-Thanh Tran, Van Diep Doan, Van Hung Hoang","doi":"10.31276/vjst.65(11).06-10","DOIUrl":"https://doi.org/10.31276/vjst.65(11).06-10","url":null,"abstract":"Heterogeneous energy-carrying materials possess outstanding advantages compared to other energy-carrying materials, therefore, research and development of this type of material to create propulsion for flying objects is an inevitable trend in the field of military science and space. This paper presents the results of research on the influence of a number of factors on the technological properties and combustion rate of heterogeneous energy-carrying materials based on acrylonitrile butadiene rubber CKH-10KTP and ammonium perchlorate (AP).The research results show that the combustion law depends on the pressure of heterogeneous energy-carrying materials based on CKH-10KTP and ultra-fine AP (specific surface area 2.61÷3.85 m2/g), using a combustion catalyst ferrocene derivative. The study also determined the optimal content of combustion catalyst - plasticiser to be 3.5÷3.8%. The research results are a solid scientific basis for optimally determining the parameters of radioactivity, energy of energy-carrying materials, supplementing the national data source in the design of aircraft engines, meeting requirements in the new context.","PeriodicalId":18650,"journal":{"name":"Ministry of Science and Technology, Vietnam","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139238241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0