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Improvement of Production Processes of Seamless Steel Pipes for Oil and Gas Production 改进石油和天然气生产用无缝钢管的生产工艺
Pub Date : 2024-04-05 DOI: 10.4028/p-i7keoa
Arif Mammadov, Aqil Babayev, Nizami Ismayilov, Muxtar Huseynov, Faiq Guliyev
The article discusses the features of improving the technological processes of electric smelting, out-of-furnace processing, continuous casting and heat treatment of steel pipe blanks used for oil and gas production. To this end, ways to improve steel processing processes in electric furnaces and non-furnaces were shown, processes for the production of continuous casting pipes with special properties for oil and gas production were studied, the design of an alloying-refining lance (LRF) was developed, refining processes by blowing magnesium-based powders were studied, heat treatment modes for continuously cast billets during pressure treatment of pipe billets have been developed. The conducted research created the basis for the development of measures to organize the production of high-quality pipes for oil and gas production in the conditions of Baku Steel Company LLC. It has been established that blowing liquid steel with inert gases (for example, argon) in an intermediate furnace or treating it with a special composition of synthetic slag, the use of LRF in an electric furnace, the correct setting of the cooling system on a continuous casting machine (CCM), the use of a vacuum system on a continuous caster, the process of refining steel by blowing Powders based on magnesium oxide instead of lime are considered more effective means of improving the quality of steel. Based on the application of these measures, low-carbon low-alloy steel 13HFA was developed and seamless pipes with a ferrite-pearlite structure were obtained from it using continuous casting technology. The strength characteristics of this steel after casting and heat treatment fully comply with the requirements of the European standard. After heat treatment (hardening and high-temperature tempering), the surface of the pipes becomes harder (troostite + sorbitol), and the core has a soft, i.e., viscous (perlite + sorbitol) structure. This “layered” structure allows the pipes to operate successfully in difficult oil and gas production conditions.
文章讨论了改进石油和天然气生产用钢管坯料的电炉冶炼、炉外加工、连铸和热处理技术工艺的特点。为此,介绍了改进电炉和非电炉钢材加工工艺的方法,研究了用于石油和天然气生产的具有特殊性能的连铸管生产工艺,开发了合金精炼喷枪(LRF)的设计,研究了吹炼镁基粉末的精炼工艺,开发了管坯压力处理期间连铸管坯的热处理模式。在巴库钢铁有限责任公司的条件下,所进行的研究为制定组织生产用于石油和天然气生产的高质量管材的措施奠定了基础。已经确定,在中间炉中用惰性气体(如氩气)吹炼钢液或用特殊成分的合成熔渣处理钢液、在电炉中使用 LRF、正确设置连铸机(CCM)的冷却系统、在连铸机上使用真空系统、通过吹炼以氧化镁为基础的粉末代替石灰来精炼钢材是提高钢材质量的更有效手段。在采用这些措施的基础上,开发了低碳低合金钢 13HFA,并利用连铸技术获得了具有铁素体-珠光体结构的无缝钢管。这种钢在铸造和热处理后的强度特性完全符合欧洲标准的要求。经过热处理(淬火和高温回火)后,钢管表面变得更加坚硬(铁素体+山梨醇),而芯部则具有柔软的粘性结构(珍珠岩+山梨醇)。这种 "分层 "结构使管道能够在困难的油气生产条件下成功运行。
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引用次数: 0
An Investigation about Microstructures, Mechanical Properties and Corrosion Behaviour of the TIG - MIG Hybrid Welded Dissimilar UNS 2205 and is 2062 Steels 关于 TIG - MIG 混合焊接异种 UNS 2205 和 is 2062 钢的微观结构、机械性能和腐蚀行为的研究
Pub Date : 2024-04-05 DOI: 10.4028/p-e6ojga
N. M. Raj, N. M. Kumar, S. Nagaraja, S. Paulsingarayar
The connecting of contrasting metals, namely double stainless steel to steel made of carbon, has taken place. performed using a hybrid welding system. A TIG and MIG welding joining based hybrid joining method was designed. The microstructures of the dissimilar metal joints were studied and the grains are coarser as contrast to the use of a single the welding process process by itself. With the addition of TIG welding to the process of MIG welding, the water-holding capacity of the metal in molten state pool is significantly improved. The nominal corrosion behaviour of the weldments was found better than the single arc welding system alone. The passivation behaviour of the joints was in the similar line to that of double stainless steel base metal. The pitting resistance of the joints in 1 M NaCl solution was inferior to the base metals.
使用混合焊接系统实现了对比金属的连接,即双层不锈钢与碳素钢的连接。设计了一种基于 TIG 和 MIG 焊接的混合连接方法。对异种金属接头的微观结构进行了研究,与使用单一焊接工艺相比,晶粒更粗。在 MIG 焊接工艺中加入氩弧焊后,熔池金属的保水能力显著提高。焊接件的名义腐蚀性能优于单独的单弧焊接系统。接头的钝化性能与双层不锈钢母材的钝化性能相似。接头在 1 M NaCl 溶液中的抗点蚀性能不如母材。
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引用次数: 0
An Analysis of the Amount of Energy Used during the Milling of Aluminum 6061 with Higher Performance 高性能铝 6061 铣削过程中的能耗分析
Pub Date : 2024-04-05 DOI: 10.4028/p-8qb0lf
K. H. Ram, R. R. Raj, D.S. Jenaris, P. Mohan, Manoj Abraham
Cutting down on energy usage while keeping the material removal rate (MRR) as high as possible is widely acknowledged to be one of the most important goals in the machining industry for a considerable amount of time. So that we can create a forecast model for side-milling machining that makes the most efficient use of the feasible amount of power, the response surface method was utilized. After that, this model was used to establish which parameters should be optimized for the machining process. The response surface approach was applied to investigate the effect that several distinct cutting elements, factors like radial slicing depth, feeding rate, and spindle rpm, all examples (RSM), had on the total power needed throughout the cutting process. The data indicate that the variable known as the feeding rate is the most important factor in the amount of energy consumed. Reduced power consumption is an unavoidable natural byproduct of accelerating cycle durations and increasing feed rates. A radial how deep the wound is in 0.3 millimetres, a feed rate of 6,000 millimetres per inch, and a spindle speed of 12,000 revolutions per minute can produce a minimum power usage of 82.38 kilowatts, as the optimization model indicates.Keywords: Material removal rate, Machining, Power consumption
在保持尽可能高的材料去除率(MRR)的同时降低能耗,是机械加工行业长期以来公认的最重要目标之一。为了创建一个侧铣加工预测模型,以便最有效地利用可行的功率,我们采用了响应面法。然后,利用该模型确定加工过程中应优化的参数。响应面法用于研究几个不同的切削要素,如径向切片深度、进给速度和主轴转速(均为实例),对整个切削过程中所需总功率的影响。数据表明,进给速度这一变量是影响能耗的最重要因素。降低能耗是加快循环持续时间和提高进给率不可避免的自然副产品。如优化模型所示,0.3 毫米的径向伤口深度、每英寸 6000 毫米的进给速度和每分钟 12000 转的主轴转速可产生 82.38 千瓦的最低耗电量:材料去除率 加工 功率消耗
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引用次数: 0
Effect of Recycled Waste PET Bottle Fibers on Mechanical Properties of Geopolymer Mixtures Containing Crushed Waste Glass Sands 回收的废 PET 瓶纤维对含有碎玻璃砂的土工聚合物混合物机械性能的影响
Pub Date : 2024-04-05 DOI: 10.4028/p-7qdqwk
Dulat Ualiyev, Anel Galymzhankyzy, Islambek Manap, Zhaniya Omarova, Doszhan Temirbekov, Aizhan Tukaziban, Zhanbolat Artyk, Chang Seon Shon, D. Zhang
This research focused on evaluating geopolymer mixture made of ASTM class F fly ash (FFA), ground granulated blast furnace slag (GGBFS), plastic fibers obtained from recycled waste pet bottles, and crushed waste glass bottle sand (WGS) from household waste. A total of 9 mixtures were designed: 3 mixtures with long fibers (5% of aggregate weight) and without WGS, 3 mixtures with shorter non-twisted fibers (2% of aggregate weight) and WGS, and 3 mixtures with shorter twisted fibers (2% of aggregate weight) and WGS. All geopolymer mixtures contained GGBFS, FFA, WGS, plastic fibers, and 10 M of alkali-activated solution. Mechanical properties of geopolymer mixtures were evaluated at 7, 14, and 28 days. Test results indicated that PET fiber-reinforced geopolymer mixtures have lower compressive strength than non-reinforced ones. The increased length of PET fiber and extended air-curing time also decrease compressive strength. Increasing WGS content generally tends to decrease the compressive strength, but 15% replacement shows improvement compared to the reference mixture. Adding PET fibers to the geopolymer mixtures significantly increases flexural strength due to better crack resistance and good strain-hardening effect. Non-twisted fibers concrete’s flexural strength was noticeably higher than that of twisted one, while the length of fibers did not have an impact. The introduction of fibers does not increase ultimate tensile strength. However, the strain coefficient was substantially increased. Non-twisted fibers geopolymer mixtures performed better than twisted ones in terms of tension resistance. The geopolymer mixture with 30% WGS showed the highest results.
本研究重点评估了由 ASTM F 级粉煤灰 (FFA)、磨碎的粒化高炉矿渣 (GGBFS)、从回收的废宠物瓶中获得的塑料纤维以及从生活垃圾中粉碎的废玻璃瓶砂 (WGS) 制成的土工聚合物混合物。共设计了 9 种混合物:其中 3 种混合物含有长纤维(占骨料重量的 5%)且不含 WGS;3 种混合物含有较短的非扭曲纤维(占骨料重量的 2%)且含有 WGS;3 种混合物含有较短的扭曲纤维(占骨料重量的 2%)且含有 WGS。所有土工聚合物混合物都含有 GGBFS、FFA、WGS、塑料纤维和 10 M 碱活性溶液。在 7、14 和 28 天时对土工聚合物混合物的机械性能进行了评估。测试结果表明,PET 纤维增强型土工聚合物混合物的抗压强度低于非增强型混合物。增加 PET 纤维的长度和延长空气固化时间也会降低抗压强度。增加 WGS 含量通常会降低抗压强度,但与参考混合物相比,15% 的替代率会提高抗压强度。在土工聚合物混合物中添加 PET 纤维可显著提高抗折强度,因为它具有更好的抗裂性和良好的应变硬化效果。无捻纤维混凝土的抗折强度明显高于有捻纤维混凝土,而纤维的长度没有影响。纤维的引入并没有提高极限抗拉强度。然而,应变系数却大幅提高。就抗拉强度而言,无捻纤维土工聚合物混合物的性能优于有捻纤维的混合物。含 30% WGS 的土工聚合物混合物的抗拉强度最高。
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引用次数: 0
Analysis of the Behavior of Bricks Using Finite Elements 使用有限元分析砖块的行为
Pub Date : 2024-04-05 DOI: 10.4028/p-geti4b
Alonso R Zúñiga-Suárez, Berenice C Zúñiga-Torres, Guido Giuliano Gualpa-Guzmán, F. Hernández-Olivares
The mechanical behavior of brick elements depends on the properties of its components. The same ones that can be obtained through experimental tests or with numerical methods, both methodologies provide excellent results. Consequently, the aims of this work to analyze the behavior of bricks by applying the finite element method. For this, a methodology based on the physical, mechanical, chemical properties of fired bricks and ecological was established, with which the mechanical behavior of different geometric sections of the bricks was calibrated and analyzed. As results, the numerical model was calibrated, obtaining maximum stresses and deformations at simple compression of 6.91 MPa, in the G5 form, defined by the Ecuadorian standard INEN 293 as solid brick in a mixture of soil-cement with gypsum; and the maximum flexural resistance is obtained at 1.65 MPa, in the same geometric section in the mix of Catamayo fired brick; concluding that exists a reliability in the results of the computational simulation analysis applied to different mixtures and geometries whose correlation is 0.99.
砖构件的机械性能取决于其组成部分的特性。同样的特性可以通过实验测试或数值方法获得,这两种方法都能提供出色的结果。因此,这项工作的目的是应用有限元方法分析砖块的行为。为此,建立了一种基于烧制砖块的物理、机械、化学特性和生态特性的方法,并以此校准和分析砖块不同几何截面的机械行为。结果表明,数值模型经过校准后,在简单压缩时获得了 6.91 兆帕的最大应力和变形,在厄瓜多尔标准 INEN 293 中将 G5 型定义为土壤-水泥-石膏混合物中的实心砖;在卡塔马约烧制砖混合物的相同几何截面上,获得了 1.65 兆帕的最大抗弯强度;结论是,应用于不同混合物和几何截面的计算模拟分析结果存在可靠性,其相关性为 0.99。
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引用次数: 0
Mechanical Behavior of Polymer Braided Stent at Rapid Radial Loading 快速径向加载时聚合物编织支架的机械行为
Pub Date : 2024-03-22 DOI: 10.4028/p-0xc6xg
Xue Hu, Chen Zhang, Bin Wang, Jin Bo Liu, Jie Cheng, Gu Tian Zhao, Zhong Hua Ni, Jue Kuan Yang
Stent implantation is the mainstream treatment for high-incidence vascular diseases. The stent is implanted into the blocked vessel with minimal trauma to restore blood flow. Polymer braided stents with superior biocompatibility and flexibility have broad application prospects in stent implantation. An ideal polymer stent should have suitable radial supporting capacity to withstand the cyclic radial load from vessels. Especially in the case of accelerated vasoconstriction caused by emotional excitement, drinking or fever, etc. However, there are currently limited studies on the mechanical properties of stent at rapid radial loading. In this work, the radial supporting capacity and fatigue properties of polymer stent at rapid loading rate were investigated by experiment and simulation. With the increase of radial loading rate, the stent has different deformation tendency and fatigue resistance. This study is helpful to study the structural changes of the polymer braided stent at different loading rates, and provide ideas for the evaluation and the optimization of the polymer braided stent.
支架植入术是治疗高发血管疾病的主流方法。将支架植入堵塞的血管中,以最小的创伤恢复血流。具有良好生物相容性和柔韧性的聚合物编织支架在支架植入中具有广阔的应用前景。理想的聚合物支架应具有适当的径向支撑能力,以承受来自血管的周期性径向负荷。尤其是在情绪激动、饮酒或发烧等导致血管加速收缩的情况下。然而,目前对支架在快速径向负荷下的机械性能的研究还很有限。本文通过实验和模拟研究了聚合物支架在快速加载速率下的径向支撑能力和疲劳特性。随着径向加载速率的增加,支架具有不同的变形趋势和抗疲劳性能。该研究有助于研究聚合物编织支架在不同加载速率下的结构变化,为聚合物编织支架的评估和优化提供思路。
{"title":"Mechanical Behavior of Polymer Braided Stent at Rapid Radial Loading","authors":"Xue Hu, Chen Zhang, Bin Wang, Jin Bo Liu, Jie Cheng, Gu Tian Zhao, Zhong Hua Ni, Jue Kuan Yang","doi":"10.4028/p-0xc6xg","DOIUrl":"https://doi.org/10.4028/p-0xc6xg","url":null,"abstract":"Stent implantation is the mainstream treatment for high-incidence vascular diseases. The stent is implanted into the blocked vessel with minimal trauma to restore blood flow. Polymer braided stents with superior biocompatibility and flexibility have broad application prospects in stent implantation. An ideal polymer stent should have suitable radial supporting capacity to withstand the cyclic radial load from vessels. Especially in the case of accelerated vasoconstriction caused by emotional excitement, drinking or fever, etc. However, there are currently limited studies on the mechanical properties of stent at rapid radial loading. In this work, the radial supporting capacity and fatigue properties of polymer stent at rapid loading rate were investigated by experiment and simulation. With the increase of radial loading rate, the stent has different deformation tendency and fatigue resistance. This study is helpful to study the structural changes of the polymer braided stent at different loading rates, and provide ideas for the evaluation and the optimization of the polymer braided stent.","PeriodicalId":17714,"journal":{"name":"Key Engineering Materials","volume":" 28","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140213694","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
Silver and Palladium-Embedded Acrylamide-Based Hybrid Cryogels as Antimicrobial Agents 银和钯嵌入丙烯酰胺基混合冷凝胶作为抗菌剂
Pub Date : 2024-03-22 DOI: 10.4028/p-vn7gub
Qamir Ullah, N. Kizilbash, J. Ambreen, Abdul Haleem, Mohamed Soliman, Mashael Alhumaidi Alotaibi, Muhammad Siddiq
Silver and palladium nanoparticles were prepared by in situ chemical reduction using Sodium Borohydride as a reducing agent at 18°C. The synthesis of pure and hybrid cryogels and the incorporation of silver and palladium nanoparticles inside the cryogel network, was confirmed by x-ray diffraction analysis and energy dispersive x-ray respectively. The antibacterial activities were checked by using the hybrid cryogels against Staphylococcus aureus (ATCC: 2593) and Escherichia coli (ATCC: 25922) bacteria. After taking into account the facile synthetic process and the adsorption performance, these cryogels can serve as good candidates for antibacterial purposes.
以硼氢化钠为还原剂,在 18°C 温度下通过原位化学还原法制备了银和钯纳米粒子。X 射线衍射分析和能量色散 X 射线分别证实了纯冷凝胶和混合冷凝胶的合成以及银和钯纳米粒子在冷凝胶网络中的结合。使用混合冷凝凝胶检测了其对金黄色葡萄球菌(ATCC:2593)和大肠杆菌(ATCC:25922)的抗菌活性。考虑到其简便的合成工艺和吸附性能,这些低温凝胶可作为抗菌剂的理想候选材料。
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引用次数: 0
Isolation of Cellulose Nanosphere from Corn Husk as a Filler for UV-Cured PEGDMA Nanocomposite Hydrogels 从玉米芯中分离出纤维素纳米圈,作为 UV 固化 PEGDMA 纳米复合水凝胶的填充物
Pub Date : 2024-03-22 DOI: 10.4028/p-a2llpb
Rohit C. Tilwani, Kirsten Noelle Anastasia K. Calimon, P. A. D. De Yro
Cellulose nanosphere (CNS) was isolated from corn husk by delignification, bleaching, acid hydrolysis, dialysis, and sonication. Successful isolation of CNS was confirmed by FTIR Analysis. The isolated CNS was found to have an average diameter of 18 nm and crystallinity index of 70% using TEM and XRD Analysis, respectively. A decrease in onset degradation temperature (Tonset) and an increase in residual mass were also observed in the TG analysis of cellulose fiber and CNS. Nanocomposite hydrogels using poly (ethylene glycol) dimethacrylate (PEGDMA) as matrix and CNS as nanofiller was prepared by UV-curing. FTIR Analysis revealed similar transmittance patterns among all the treatments. Thermal characterization showed that the addition of CNS lowers the Tonset and Tmax while increasing the temperature required for the total degradation of the UV-cured nanocomposite hydrogels.
通过脱木质、漂白、酸水解、透析和超声处理,从玉米皮中分离出纤维素纳米球(CNS)。傅立叶变换红外分析证实了 CNS 的成功分离。利用 TEM 和 XRD 分析发现,分离出的 CNS 平均直径为 18 nm,结晶度指数为 70%。在纤维素纤维和 CNS 的 TG 分析中还观察到起始降解温度(Tonset)的降低和残余质量的增加。以聚(乙二醇)二甲基丙烯酸酯(PEGDMA)为基质,氯化萘为纳米填料,通过紫外固化制备了纳米复合水凝胶。傅立叶变换红外光谱分析显示所有处理方法的透射率模式相似。热特性分析表明,添加 CNS 可降低 Tonset 和 Tmax,同时提高紫外固化纳米复合水凝胶完全降解所需的温度。
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引用次数: 0
Antimicrobial Effect of Dental Adhesive on Cariogenic Multi-Species Biofilm 牙科粘合剂对致癌多物种生物膜的抗菌效果
Pub Date : 2024-03-22 DOI: 10.4028/p-eimzh9
S. Thaweboon, Takashi Saito, Sirilak Mateekusontan, B. Thaweboon
Dental caries, or tooth decay, is one of the most widespread chronic and multifactorial diseases affecting people worldwide. It is described as the localized destruction of tooth structure by acids produced from bacteria fermentation of edible carbohydrates. The disease process begins within the bacterial biofilm on the surfaces of the teeth. Streptococcus sanguinis, Sreptococcusgordonii, and Streptococcus mutans are the main organisms in the biofilm associated with health or disease conditions in the oral cavity. Streptococcus mutans is believed to be the primary cause of enamel demineralization and the development of dental caries. S. gordonii and S. sanguinis belong to a group of streptococci considered health-related commensal oral bacteria, crucial for forming a biofilm on oral hard tissues. Several types of materials with multipurpose characteristics have been incorporated into dental adhesives. Recently, the calcium salt of an acidic monomer (calcium salt of 4-methacryloxyethyl trimellitic acid, or CMET) has been included in dental adhesive and demonstrated to suppress cariogenic biofilm formation of S. mutans. However, using a single-species model may not mimic the intricate antagonistic and synergistic relations that occur in oral biofilms. Therefore, the effect on cariogenic multi-species biofilm was assessed in this study. Dental adhesive consisting of CMET and 10-methacryloyloxydecyl dihydrogen calcium phosphate (MDCP) (Bio-Coat CA) was spread over the flat-bottom surface of the 96-well plate and LED light-cured. Then it was coated with sterile saliva at 37 °C for 45 min to form an acquired pellicle for microbial attachment. The multi-species bacterial suspension containing Streptococcus mutans ATCC 25715, Streptococcus sanguinis ATCC 10556, and Streptococcus gordonii ATCC 10558 was prepared and added to the saliva-coated well. Then, the plate was incubated at 37°C in a 5% CO2 atmosphere for 24 h, 48 h, and 72 h to support the biofilm formation. The number of vital bacteria in the biofilm was determined with the WST-8 Microbial Cell Counting Kit (Dojindo Molecular Technologies, USA). All tests were done in triplicate and repeated three times. For statistical analysis, Kruskal-Wallis and Dunn’s tests were employed. The results showed that at 24 h, 48 h, and 72 h, dental adhesive with CMET could inhibit the biofilm formation of multi-species bacteria significantly compared with controls. The percentages of biofilm inhibition were 29.1%, 34.7%, and 33.2% at 24 h, 48 h, and 72 h, respectively. Dental adhesive containing CMET displayed favorable multi-species biofilm-inhibiting effects up to 72 h of biofilm growth. It is a promising adhesive for use to prevent secondary caries at the sites of restorations.
龋齿或蛀牙是影响全世界人民的最普遍的多因素慢性疾病之一。它被描述为细菌发酵可食用碳水化合物产生的酸性物质对牙齿结构的局部破坏。病变过程始于牙齿表面的细菌生物膜。血链球菌、戈登链球菌和变异链球菌是与口腔健康或疾病相关的生物膜中的主要生物。变异链球菌被认为是釉质脱矿和龋齿形成的主要原因。戈登链球菌(S. gordonii)和血清链球菌(S. sanguinis)属于链球菌群,被认为是与健康相关的口腔共生细菌,对在口腔硬组织上形成生物膜至关重要。牙科粘合剂中已经加入了几种具有多功能特性的材料。最近,一种酸性单体的钙盐(4-甲基丙烯酰氧乙基偏苯三酸钙盐)被加入牙科粘合剂中,并被证明能抑制突变杆状病毒的致龋生物膜形成。然而,使用单一物种模型可能无法模拟口腔生物膜中错综复杂的拮抗和协同关系。因此,本研究评估了对致癌多菌种生物膜的影响。将由 CMET 和 10-甲基丙烯酰氧癸基磷酸二氢钙(MDCP)组成的牙科粘合剂(Bio-Coat CA)涂抹在 96 孔板的平底表面,并用 LED 光固化。然后在 37 °C 下用无菌唾液涂布 45 分钟,以形成微生物附着的获得性胶层。制备含有变异链球菌(Streptococcus mutans ATCC 25715)、血清链球菌(Streptococcus sanguinis ATCC 10556)和戈登链球菌(Streptococcus gordonii ATCC 10558)的多菌种细菌悬浮液,并将其加入唾液涂层孔中。然后,将平板置于 37°C 的 5%二氧化碳环境中培养 24 小时、48 小时和 72 小时,以支持生物膜的形成。使用 WST-8 微生物细胞计数试剂盒(美国 Dojindo 分子技术公司)测定生物膜中的重要细菌数量。所有测试均一式三份,重复三次。统计分析采用 Kruskal-Wallis 和 Dunn 检验。结果表明,与对照组相比,添加了 CMET 的牙科粘合剂在 24 小时、48 小时和 72 小时内均能显著抑制多菌种细菌生物膜的形成。24 小时、48 小时和 72 小时的生物膜抑制率分别为 29.1%、34.7% 和 33.2%。含有 CMET 的牙科粘合剂在生物膜生长 72 小时内显示出良好的多菌种生物膜抑制效果。它是一种很有前途的粘合剂,可用于防止修复部位的二次龋坏。
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引用次数: 0
The Physical Properties of Vanillin-Incorporated Irreversible Hydrocolloid Impression Material 掺入香兰素的不可逆水胶体印模材料的物理特性
Pub Date : 2024-03-22 DOI: 10.4028/p-awafw7
Sirada Leelapong, Sirilak Mateekusontan, Supissara Makkrajang, Pornkiat Churnjittapirom, S. Thaweboon
Irreversible hydrocolloid impression material is extensively used in dentistry to record and duplicate the details of tooth structure, surrounding tissue, and other intraoral structures. The materials allow dentists to work more easily and perform better diagnosis and treatment planning. When used, the material is exposed to oral microorganisms, some are pathogens, from the patient’s teeth, mucosa, blood, and saliva. These pathogens can be absorbed into the material and transmitted to dentists and other dental workers. Hydrocolloid impression material incorporated with vanillin has been shown to exhibit antimicrobial potential, however, its physical properties have not been performed. Therefore, this study aims to investigate the physical properties of a vanillin-incorporated irreversible hydrocolloid impression material on four different physical properties: working time, setting time, elastic recovery, and strain-in compression. The impression powder was mixed with varying concentrations of vanillin (0.1%, 0.5%, and 1.0% w/w) using the electric vacuum mixer. The impression material without vanillin was used as a control. All the tests were done following the ISO specification 21563: 2021 for dental materials with 15 specimens for each test. The result showed that at concentrations of 0%, 0.1%, and 0.5% w/w vanillin, no significant change in the four physical properties has been observed. However, the working time and setting time values of impression material with 1% vanillin were reduced significantly and did not meet the ISO standard. In conclusion, the incorporation of 0.1%, 0.5%, and 1% w/w vanillin into irreversible hydrocolloid impression material showed a significant reduction in setting time and working time. However, when considering the ISO standard specifications, the 0.1% and 0.5% w/w vanillin-added materials can still be used due to their acceptable values of all physical properties (setting time, working time, elastic recovery, and strain-in compression). These impression materials will be valuable for use in clinical settings to reduce the disinfection procedure and the risk of cross-contamination.
不可逆水胶体印模材料广泛应用于牙科,用于记录和复制牙齿结构、周围组织和其他口腔内结构的细节。这种材料能让牙医更轻松地工作,更好地进行诊断和治疗规划。使用时,材料会接触到患者牙齿、粘膜、血液和唾液中的口腔微生物,其中有些是病原体。这些病原体会被材料吸收,并传染给牙医和其他牙科工作者。含有香兰素的水胶体印模材料已被证明具有抗菌潜力,但其物理性质尚未进行研究。因此,本研究旨在研究掺入香兰素的不可逆水胶体印模材料的四种不同物理性质:工作时间、凝固时间、弹性恢复和应变压缩。使用电动真空混合器将印模粉末与不同浓度的香兰素(0.1%、0.5% 和 1.0% w/w)混合。不含香兰素的印模材料作为对照。所有测试均按照 ISO 21563:2021 牙科材料规范进行,每次测试使用 15 个试样。结果表明,当香兰素的浓度为 0%、0.1% 和 0.5%(重量百分比)时,四种物理性质均无明显变化。不过,香兰素含量为 1%的印模材料的工作时间和凝固时间值明显缩短,不符合 ISO 标准。总之,在不可逆水胶体印模材料中添加 0.1%、0.5% 和 1%(重量百分比)的香兰素会显著缩短凝固时间和工作时间。不过,考虑到 ISO 标准的规格,添加了 0.1% 和 0.5% w/w 香草素的材料仍然可以使用,因为它们的所有物理性能(凝固时间、工作时间、弹性恢复和压缩应变)都达到了可接受的值。这些印模材料可用于临床,以减少消毒程序和交叉感染的风险。
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引用次数: 0
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