Materiale Plastice最新文献_第5页

Starch Modified Tough Biocompatible Polyurethane/acrylamide bio Composites: Physicochemical Properties and Biodegradation Studies 淀粉改性韧性生物相容性聚氨酯/丙烯酰胺生物复合材料:理化性质及生物降解研究

IF 0.8 4区材料科学

Materiale Plastice Pub Date : 2023-04-05 DOI: 10.37358/mp.23.1.5649

Jeevitha Vedaiyan, Ravichandran Kandaswamy, Lynda Merlin Dasaien

{"title":"Starch Modified Tough Biocompatible Polyurethane/acrylamide bio Composites: Physicochemical Properties and Biodegradation Studies","authors":"Jeevitha Vedaiyan, Ravichandran Kandaswamy, Lynda Merlin Dasaien","doi":"10.37358/mp.23.1.5649","DOIUrl":"https://doi.org/10.37358/mp.23.1.5649","url":null,"abstract":"\u0000Biodegradable bio composites with potential applications in medical implants were prepared with starch content by in situ polymerization technique using polyurethane prepolymers. (PU) and acrylamide (AAM) monomers. The structure and properties of bio composites were evaluated. FT-IR spectroscopy showed bonding between N=C=O functional group terminated polyurethanes confirmed improved compatibility of prepolymers, AAM, starch and bio composites. The DSC data are the glass transition (Tg) of the bio composite and ordinary polyacrylamide (PAAM) network. By incorporating starch and polyurethane in the form of an interpenetrating network into a polyacrylamide network, mechanical and thermal properties of bio composites due to higher crosslink density given by hard segment content. We studied the swelling behavior of both bio composites and individual PAAM networks under different pH conditions to validate their biocompatibility and potential use in biomedicine setting. The hydrolytic stability of biocomposites and PAAM networks was investigated using phosphate buffer. Hydrolytic stability of biocomposites was found to be higher comparison with PAAM network. Morphological analysis of the samples showed uniform distribution and good interfacial adhesion. Improves sample biodegradability it was revealed by the soil runoff test.\u0000","PeriodicalId":18360,"journal":{"name":"Materiale Plastice","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42419945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Effect of Disinfection Methods on C. Albicans in Three Types of Denture Base Materials 消毒方法对三种义齿基托材料中白色念珠菌的影响

IF 0.8 4区材料科学

Materiale Plastice Pub Date : 2023-04-05 DOI: 10.37358/mp.23.1.5641

Gulsah Akyildiz, Z. Duymus, S. Karaoglu, A. Bozdeveci

{"title":"The Effect of Disinfection Methods on C. Albicans in Three Types of Denture Base Materials","authors":"Gulsah Akyildiz, Z. Duymus, S. Karaoglu, A. Bozdeveci","doi":"10.37358/mp.23.1.5641","DOIUrl":"https://doi.org/10.37358/mp.23.1.5641","url":null,"abstract":"\u0000This study aimed to evaluate the efficacy of disinfectant solutions on Candida albicans (C. albicans) for different types of denture materials. A total of 144 specimens (10x10x2 mm) were obtained from three different materials: autopolymerized acrylic resin, heat-cured acrylic resin, and hard relining material (n = 6). Three disinfectant solutions were used: 100% white vinegar, 2% chlorhexidine digluconate (Saver) and denture cleaning tablets (Corega). The specimens were placed on Eliza plates and 1.5 mL of Yeast Extract Peptone (YPD) was added to each well. Then, 30�L of candida culture was added to the wells. Next, the specimens were incubated at 37�C at 80 rpm for 48 h. Disinfectants were added to the Eliza plates. For all specimens, the disinfectants were replaced with 2 mL of sterile water and kept at 100 rpm for 30 min. Then, 0.1 mL of the liquid was taken and inoculated into the pads containing YPD medium. After incubation, the candida colony growth on the pads was measured. Scanning electron microscope (SEM) images were taken from randomly selected specimens from each group. Statistically significant differences (𝑃 [ 0.05) were found between the disinfectant method groups and the control group for the three types of denture materials. The 2% chlorhexidine gluconate (Saver) disinfectant was the most effective for C. Albicans ATCC 60193 and oral isolate of C. Albicans for all three of the tested denture materials. The effect of cleaning of tabs (Corega) and white vinegar was found to be similar.\u0000","PeriodicalId":18360,"journal":{"name":"Materiale Plastice","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44759912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Use of Panels Made from Plastic Waste in Thermal Insulation 用塑料废料制成的板作隔热材料

IF 0.8 4区材料科学

Materiale Plastice Pub Date : 2023-04-05 DOI: 10.37358/mp.23.1.5650

I. Antypas, T. Savostina

引用次数: 2

Biomaterials Used in the Prosthetics of Facial Fractures 生物材料在面部骨折修复中的应用

IF 0.8 4区材料科学

Materiale Plastice Pub Date : 2023-04-05 DOI: 10.37358/mp.23.1.5645

F. Anghelina, Alina Andreea Mitroi, E. Ciucă, Lavinia Toma Tumbar, A. Boicea, L. Anghelina, Cătălina Voiosu, A. Camen, R. Hainăroșie

引用次数: 0

Research on the Lifting Forces of Industrial Plastic Vacuum Cups 工业塑料真空杯提升力的研究

IF 0.8 4区材料科学

Materiale Plastice Pub Date : 2023-04-05 DOI: 10.37358/mp.23.1.5647

S. Ravai-Nagy, L. Butnar

{"title":"Research on the Lifting Forces of Industrial Plastic Vacuum Cups","authors":"S. Ravai-Nagy, L. Butnar","doi":"10.37358/mp.23.1.5647","DOIUrl":"https://doi.org/10.37358/mp.23.1.5647","url":null,"abstract":"\u0000Industrial vacuum cups are used for lifting, holding and moving a wide variety of automated applications for handling semi-finished products and parts made of a wide range of materials - metal, glass, plastic, paper, wood, etc. and are used in a variety of industries. This paper presents some of the authors theoretical and experimental research on the maximum lifting force that different types of vacuum cups can achieve. The study was carried out on the basis of sizing recommendations made by manufacturers and dealers of these types of vacuum cups. The specially designed experimental stand was installed on the universal material testing machine LBG 100 kN and allowed the practical determination of these lifting forces provided by various types of industrial vacuum cups. Lifting force measurements were carried out with the AXIS FB 1k digital dynamometer attached to the machine. Vacuum cups of 3 different shapes and made of 3 different materials were used, using different vacuum depressions - 0.3 bar, -0.5 bar, -0.7 bar and -0.9 bar. The research aimed to determine by measurement the maximum lifting force of these types of vacuum cups applied to steel parts. The results obtained for these forces were compared with the calculated theoretical values, with the manufacturer�s recommended dimensioning values, and comparative conclusions were also drawn on the maximum lifting force provided by the different types of industrial vacuum cups studied.\u0000","PeriodicalId":18360,"journal":{"name":"Materiale Plastice","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41592452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

The Importance and Necessity of New Bio-Based Materials in Industrial Design 新型生物基材料在工业设计中的重要性和必要性

IF 0.8 4区材料科学

Materiale Plastice Pub Date : 2023-04-05 DOI: 10.37358/mp.23.1.5651

A. Avramescu

{"title":"The Importance and Necessity of New Bio-Based Materials in Industrial Design","authors":"A. Avramescu","doi":"10.37358/mp.23.1.5651","DOIUrl":"https://doi.org/10.37358/mp.23.1.5651","url":null,"abstract":"\u0000Main goals like technical innovation, costs and respect for the environment urge us to discover finer, lighter, biodegradable, and more �intelligent� materials in their functionality. The development of industrial design is motivated by criteria such as the environment, sustainability, the need for lightweight products, manufactured with fewer components and integrating various functions. As experts in new materials and technologies for the development of innovative products, we work closely with international research institutes as part of our projects. We want to create materials that combine such properties in the most efficient way, interacting with their close environment and the environment in general and, based on their features, to be transformed through various processes in completely different materials. The goal of our work is to compare different existing materials with a new bio-based material using quantifiable measurement indicators and sensory measurement indicators. The purpose of this article is to provide a few elements that can be used as a guide in establishing a quantitative impact assessment strategy based on the use of sensory evaluation techniques. In the framework of our presentation, we will focus mostly on comparing the materials via a metrological tool for quantifying tactile characteristics likely to be correlated to the ground truth that constitutes a sensory profile.\u0000","PeriodicalId":18360,"journal":{"name":"Materiale Plastice","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48604414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Study on the Use of Digital Technology in the Realization of Prosthetic Restorations 数字技术在假肢修复中的应用研究

IF 0.8 4区材料科学

Materiale Plastice Pub Date : 2023-04-05 DOI: 10.37358/mp.23.1.5648

A. Popescu, A. Cojocaru

{"title":"Study on the Use of Digital Technology in the Realization of Prosthetic Restorations","authors":"A. Popescu, A. Cojocaru","doi":"10.37358/mp.23.1.5648","DOIUrl":"https://doi.org/10.37358/mp.23.1.5648","url":null,"abstract":"\u0000The use of digital technology has become a useful and also a preferred process in the realization of dental prosthetic restorations, because through it, superior quality dental prostheses are obtained in terms of aesthetics, accuracy of execution and durability. CAD/CAM technology is changing all aspects of dentistry, making dental restoration processes much easier and more efficient for dentists, patients and dental technicians. The materials that can be used to manufacture dental restorations designed using Exocad software depend on the type of restoration (crowns, bridges, veneers, etc.) and the manufacturing method (milling with a 3-, 4-, or 5-axis CAM device); available materials include: PMMA (polymethyl methacrylate) and zirconia. Using digital technology, in this study we performed 6 fixed prosthetic restorations, of which 5 unidental restorations (5 dental crowns) and 1 pluridental restoration (a 4-element dental bridge); of the 6 prosthetic restorations, 3 restorations will be fixed by cementing on dental abutments, and 3 restorations will be fixed by screwing on implants. Digital technology allows the use of higher quality materials, resulting in more resistant and more aesthetic prosthetic restorations; helps reduce the occurrence of errors; obtaining a better marginal adaptation and a perfect adaptation to the anatomical structures of the patient s teeth.\u0000","PeriodicalId":18360,"journal":{"name":"Materiale Plastice","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46486357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis and Preliminary Characterization of Polyurethane Matrices Used as a Drug Carrier for Bromelain 菠萝蛋白酶药物载体聚氨酯基质的合成及初步表征

IF 0.8 4区材料科学

Materiale Plastice Pub Date : 2023-04-05 DOI: 10.37358/mp.23.1.5639

I. Tuta-Sas, F. Borcan, I. Sas

{"title":"Synthesis and Preliminary Characterization of Polyurethane Matrices Used as a Drug Carrier for Bromelain","authors":"I. Tuta-Sas, F. Borcan, I. Sas","doi":"10.37358/mp.23.1.5639","DOIUrl":"https://doi.org/10.37358/mp.23.1.5639","url":null,"abstract":"\u0000Bromelain, a natural substance sourced from pineapples, was found effective in various colds, in preventing heart attack and respectively in excess weight. On the other hand, it is well-known that pineapples juice increases the gastric acidity and respectively the people with hemophilia, internal bleeding must also be very careful in consuming this fruit. The objectives of this study were to obtain and to characterize a drug delivery system used for the transmembrane transfer of bromelain. The samples based on polyurethane matrices with and respectively without bromelain were synthesized and characterized by measurements of pH, encapsulation efficacy, cumulative drug release in a degradative media and in simulated gastric acid, electron microscopy and by modern techniques such as Zetasizer, cytotoxicity assay, and various non-invasive skin irritation assessment. The results indicate the obtaining of polyurethane matrices with mean sizes between 322-342 nm and neutral pH, that have a medium stability against the clusters formation tendency and a medium drug release rate. The non-irritative potential and the results on their cytotoxicity are important evidences that can be used for the further clinical trials of the polyurethane carriers.\u0000","PeriodicalId":18360,"journal":{"name":"Materiale Plastice","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42367878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Impact Behavior Analysis of 3-D Printed Honeycomb Structures 3d打印蜂窝结构的冲击性能分析

IF 0.8 4区材料科学

Materiale Plastice Pub Date : 2022-10-03 DOI: 10.37358/mp.22.3.5607

C. Stoica, R. Maier, A. Istrate, Sebastian Bucaciuc, Alexandra Despa

{"title":"Impact Behavior Analysis of 3-D Printed Honeycomb Structures","authors":"C. Stoica, R. Maier, A. Istrate, Sebastian Bucaciuc, Alexandra Despa","doi":"10.37358/mp.22.3.5607","DOIUrl":"https://doi.org/10.37358/mp.22.3.5607","url":null,"abstract":"\u0000The purpose of this paper is to evaluate the behaviour of 3D printed honeycomb structures under low velocity impact loading for their use in energy absorption applications. Additive manufacturing technologies are part of a growing field that represents high interest for industries such as aerospace, automotive and naval. This paper aims to determine the mechanical properties of a 3D printed polymer - Polylactic Acid (PLA) manufactured by FDM (Fused Deposition Modelling) technology. In this regard, first the material is characterized by low velocity impact dynamic experimental tests. A finite Element Analysis (FEA) is performed in LS-Dyna software in order to validate the results. The samples were manufactured by varying the infill percent to investigate the influence of different parameters on a batch of samples for every configuration. The 3D CAD modelling for impact tests samples were performed in Catia V5. Among wide range of cellular structures, honeycomb non-auxetic hexagonal cell pattern was selected in this study, assuring high strength/weight ratio. The amount of energy absorbed during the impact, the failure and degradation of the impacted specimens were monitored, following the analysis of experimental and numerical data. A fair agreement was obtained between experimental and numerical results, showing that honeycomb developed lightweight structures exhibits a proper energy absorption capacity, with a mechanism of release similar to metal or composite materials honeycombs.\u0000","PeriodicalId":18360,"journal":{"name":"Materiale Plastice","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45426062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Asbestos-Free Brake Lining Material Using Sea Shell 使用Sea Shell的无石棉制动衬片材料

IF 0.8 4区材料科学

Materiale Plastice Pub Date : 2022-10-03 DOI: 10.37358/mp.22.3.5609

Vijayasankar Vinayak Arun Sankar, P. Suresh

{"title":"Asbestos-Free Brake Lining Material Using Sea Shell","authors":"Vijayasankar Vinayak Arun Sankar, P. Suresh","doi":"10.37358/mp.22.3.5609","DOIUrl":"https://doi.org/10.37358/mp.22.3.5609","url":null,"abstract":"\u0000Due to the extreme health concerns associated with asbestos-based brake linings, researchers are looking at using ecologically friendly bio-based biomaterials as reinforcing agents in composite materials used to make brake pad linings. The goal of this study is to see whether using sea shell (SS) powder in the production of asbestos-free brake lining materials is feasible. The powders were combined with the necessary fillers to make the brake lining. The reinforcing powders compositions were varied between 20% and 35%, the resin binder s composition was changed between 58 and 43 percent, and the filler metal and curing agents compositions were kept constant. These ingredients were weighed, prepared, combined, cured, and moulded. The composite materials were tested for water and oil absorption, compressive strength, hardness, and wear. According to the findings, increasing the quantity of reinforcing components increases the water and oil absorption of the samples. With the addition of up to 35% content, the composite s compressive strength increased proportionally. The tested coefficient of friction was found to be within acceptable limits. Furthermore, when mixed with other fillers and restricted, SS powder has showed tremendous promise in the production of brake linings.\u0000","PeriodicalId":18360,"journal":{"name":"Materiale Plastice","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49570701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0