Macromolecular Symposia最新文献_第9页

Rapid Prototyping Process of Aerodynamic Components for a UAV 无人机气动部件快速成型工艺研究

Macromolecular Symposia Pub Date : 2025-06-18 DOI: 10.1002/masy.70041

Serafim Muntean, Sebastian Pop, Gheorghe Oancea

{"title":"Rapid Prototyping Process of Aerodynamic Components for a UAV","authors":"Serafim Muntean, Sebastian Pop, Gheorghe Oancea","doi":"10.1002/masy.70041","DOIUrl":"https://doi.org/10.1002/masy.70041","url":null,"abstract":"The paper presents an application of the rapid prototyping process of the aerodynamic fiberglass and carbon fiber element for aeronautical vehicle systems without pilots, whose mold is made of extruded polyester foam or expanded polyester by hot wire cutting process. To manufacture an aerodynamic fiber element, usually a mold is required. In the case of traditional manufacturing or in the case of rapid manufacturing of a fiberglass and/or carbon fiber wing or empennage, both processes consist of layering the fiber and resin and polymerizing it in a mold, then finishing, painting, and coating, if necessary, with a protective layer. The traditional manufacturing of mold for the fiberglass or carbon fiber wing is expensive depending on the material used and is a time-consuming process. The process presented in the paper has a working time of 8 h in laboratory conditions for obtaining an aerodynamical element with dimensions up to 1000 × 500 × 300. This would mean a much shorter time to manufacture a mold compared to the obtaining of a mold for series, which can take from several weeks to several months. In the article, the steps of the rapid manufacturing of an aerodynamic element are described, and its practical implementation is discussed in detail. A comparison is made between the traditional process and the proposed rapid manufacturing process.","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144308694","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

Comparison of Native and Modified Biopolymer Blends and Their Potential as Sustained Delivery System for Tolfenamic Acid 天然和改性生物聚合物共混物的比较及其作为甲苯胺酸持续递送系统的潜力

Macromolecular Symposia Pub Date : 2025-06-18 DOI: 10.1002/masy.70032

Sofia Milenkova, Asya Viraneva, Maria Marudova

{"title":"Comparison of Native and Modified Biopolymer Blends and Their Potential as Sustained Delivery System for Tolfenamic Acid","authors":"Sofia Milenkova, Asya Viraneva, Maria Marudova","doi":"10.1002/masy.70032","DOIUrl":"https://doi.org/10.1002/masy.70032","url":null,"abstract":"Biocompatible and biodegradable polymers are becoming more and more attractive and desired platforms for the development of novel and composite materials. However, some of them are naturally insoluble in water, which is their main drawback and affects their whole behavior. To address this problem and make them porous and, therefore, more hydrophilic, different approaches have been proposed, such as plasma treatment, etching, and chemical modification. The present study is focused on the potential of poly (ethylene glycol) as pore-forming in casted films made out of poly(lactic acid), poly(ε-caprolactone), and their blends at three different ratios. These porous films were compared with the same blends but without modification. The effect of poly (ethylene glycol) on the general mechanical properties as Young modulus, load, stress, and strain at upper yield was evaluated. Additionally, the influence of the formed pores and the ability of the films to get charged was established, as they were corona treated with positive and negative polarity. After this treatment, all of the developed variations were used as a base for multilayer film formation between chitosan and casein. The release profiles out of the as formed layer-by-layer structures for active compound (tolfenamic acid) were investigated.","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144308857","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

Optimization of 3D Printing Parameters For The Fabrication of Kinematic Elements In Mono-Mobile Robot Design 单移动机器人运动部件3D打印参数优化研究

Macromolecular Symposia Pub Date : 2025-06-18 DOI: 10.1002/masy.70049

Ileana Dugăeșescu, Angela-Miruna Neacșu-Pavel, Constantin Opran, Nicolae Tunsoiu, Cristian-Vasile Doicin

{"title":"Optimization of 3D Printing Parameters For The Fabrication of Kinematic Elements In Mono-Mobile Robot Design","authors":"Ileana Dugăeșescu, Angela-Miruna Neacșu-Pavel, Constantin Opran, Nicolae Tunsoiu, Cristian-Vasile Doicin","doi":"10.1002/masy.70049","DOIUrl":"https://doi.org/10.1002/masy.70049","url":null,"abstract":"Summary: The paper presents a comprehensive analysis of the Ultimaker S5 3D printer and its application in industrial environments. A systematic approach was employed to identify the most important features and parameters influencing the performance and efficiency of the printer. This involved analyzing its material compatibility to understand how these factors contribute to high quality prints. Critical parameters such as print speed, layer height, infill density, and material usage were studied to determine their impact on cost and durability. Various infill patterns and materials, including ABS, PLA, and PET-G were examined to optimize the printing process for both prototyping and functional part production. A multidisciplinary approach integrating mechanical properties, material science and production efficiency was used to assess the strengths and weaknesses of different parameters. The main considerations include material selection, print duration and cost, with particular focus on balancing strength and speed. The study proposes an optimized framework for utilizing the Ultimaker S5 in industrial applications, offering insights into how its advanced features can be leveraged to produce functional, durable, and cost-effective parts across sectors like academic, healthcare, aerospace, and automotive industries.","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144308862","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

Buckling Behavior Of Tubular Parts Made of Polylactic Acid 聚乳酸管状件的屈曲行为

Macromolecular Symposia Pub Date : 2025-06-18 DOI: 10.1002/masy.70054

Adelina Hrițuc, Elisaveta Crăciun, Liviu Andrușcă, Andrei Marius Mihalache, Margareta Coteață, Vasile Ermolai, Gheorghe Nagîț, Laurențiu Slătineanu

引用次数: 0

Remanufacturing of Damaged Parts From a UAV 无人机损坏部件的再制造

Macromolecular Symposia Pub Date : 2025-06-18 DOI: 10.1002/masy.70042

MădălinaIoana Blaj, Gheorghe Oancea

引用次数: 0

New Food Packaging Material Based on Modified Corn Oil 基于改性玉米油的新型食品包装材料

Macromolecular Symposia Pub Date : 2025-06-18 DOI: 10.1002/masy.70050

Federico Barrino, Giuseppe Mattia Lo Piccolo, Jaume Sempere-Torregrosa, Harrison De La Rosa-Ramírez, Maria Dolores Samper

{"title":"New Food Packaging Material Based on Modified Corn Oil","authors":"Federico Barrino, Giuseppe Mattia Lo Piccolo, Jaume Sempere-Torregrosa, Harrison De La Rosa-Ramírez, Maria Dolores Samper","doi":"10.1002/masy.70050","DOIUrl":"https://doi.org/10.1002/masy.70050","url":null,"abstract":"In this manuscript, we present novel bioplastics, which are completely biodegradable, for their potential use in food packaging to replace fossil-fuel-derived plastic films and slow food degradation due to oxidative processes or microbial contamination. In fact, the work analyzes the influence of modified corn oil as a plasticizing and/or compatibilizing agent in the polylactic acid (PLA) and polyhydroxybutyrate (PHB) blend. The films were obtained thanks to a blown film extruder. The low percentages of epoxidized (EPO) and maleinized (MAL) corn oil have been chosen to ensure the mixability and homogeneous distributions of the oil within the PLA–PHB matrix during processing and in the final films, and to avoid cost increases for the final material compared with the proposed material. The innovative contribution of this manuscript is the use of active films capable of slowing down the deterioration of food in order to avoid the waste of fruit and vegetables. In fact, a large amount of fruits and vegetables are thrown away because the consumer is unable to use them all before spoilage. For this reason, the materials obtained have the ability to wrap the cut and uneaten fruit so that it can be preserved and maintain its integrity over time, thus preventing it from being thrown away and wasted.","PeriodicalId":18107,"journal":{"name":"Macromolecular Symposia","volume":"414 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144309081","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

Sustainable Utilization of Industrial Waste in Metakaolin-Based Geopolymer Systems 偏高岭土聚合物体系中工业废弃物的可持续利用

Macromolecular Symposia Pub Date : 2025-06-18 DOI: 10.1002/masy.70020

Veronica Viola