Macromol最新文献_第2页

Preparation of Polyurethane–Urea Fibers with Controlled Surface Morphology via Gel State 凝胶法制备表面形貌可控的聚氨酯-尿素纤维

Macromol Pub Date : 2023-10-21 DOI: 10.3390/macromol3040042

Yutaka Ohsedo, Honoka Murata

{"title":"Preparation of Polyurethane–Urea Fibers with Controlled Surface Morphology via Gel State","authors":"Yutaka Ohsedo, Honoka Murata","doi":"10.3390/macromol3040042","DOIUrl":"https://doi.org/10.3390/macromol3040042","url":null,"abstract":"It is widely known that skin irritation can be induced by interactions between polymer fibers constituting clothing and the skin, leading to skin inflammation and unfavorable dermatological reactions. Thus, significant endeavors have been directed toward ameliorating this phenomenon. This study engineered synthetic fibers with reduced potential for skin irritation. This was achieved via a strategy inspired by the inherent smoothness of silk fibers, which exhibit minimal friction and irritation against the skin. This investigation focused on urethane fibers, a class of synthetic fibers frequently used in textile applications. Hydrogel cross-linked polyurethane–urea fibers were subjected to controlled swelling in different hydrophilic mixed-solvent environments. Subsequent freeze-drying procedures were employed to yield fibers with diverse surface morphologies and encompassing features such as elevations and creases. The correlation between the compositions of the solvent mixtures used and the resulting surface morphologies of the fibers was rigorously assessed through polarized light and scanning electron microscopies. Additionally, the interplay between the degree of swelling and the tensile strength of the fabricated fibers was comprehensively analyzed. Consequently, the methodological combination of swelling and freeze-drying endowed the polyurethane–urea fibers with various surface profiles. Future studies will delve into the intricate connection between fiber surface characteristics and their potential to induce skin irritation. It is envisaged that such investigations will substantially contribute to the refinement of textile fibers designed for enhanced compatibility with the skin.","PeriodicalId":18139,"journal":{"name":"Macromol","volume":"120 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135510737","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

Fully Biodegradable Edible Packaging Foils on the Basis of Potato Starch–Lipid–Protein Ternary Complexes 以马铃薯淀粉-脂质-蛋白质三元配合物为基础的可完全生物降解食用包装箔

Macromol Pub Date : 2023-10-19 DOI: 10.3390/macromol3040041

Agnieszka Folentarska, Anna Kulakowska, Volodymyr Pavlyuk, Magdalena Krystyjan, Piotr Tomasik, Wojciech Ciesielski

引用次数: 0

Sustainable Food Packaging with Chitosan Biofilm Reinforced with Nanocellulose and Essential Oils 纳米纤维素和精油增强壳聚糖生物膜的可持续食品包装

Macromol Pub Date : 2023-10-10 DOI: 10.3390/macromol3040040

Sofia J. Silva, Nsevolo Samba, José Mendes, João R. A. Pires, Carolina Rodrigues, Joana Curto, Arlindo Gomes, Ana Luísa Fernando, Lúcia Silva

{"title":"Sustainable Food Packaging with Chitosan Biofilm Reinforced with Nanocellulose and Essential Oils","authors":"Sofia J. Silva, Nsevolo Samba, José Mendes, João R. A. Pires, Carolina Rodrigues, Joana Curto, Arlindo Gomes, Ana Luísa Fernando, Lúcia Silva","doi":"10.3390/macromol3040040","DOIUrl":"https://doi.org/10.3390/macromol3040040","url":null,"abstract":"Active packaging with biobased polymers aim to extend the shelf life of food and to improve the environmental sustainability of the food industry. This new concept was tested with samples of fresh poultry meat wrapped with chitosan reinforced with 2.5% of commercial nanocellulose (NC) incorporating 1% of essential oils (EO) from Aloysia citrodora (ACEO) and Cymbopogon citratus (CCEO). The performance of the bionanocomposites containing EOs was assessed and compared with unwrapped meat samples and samples wrapped with chitosan/NC, during a 13 day period of refrigerated storage for several physicochemical parameters related to food deterioration and microbial growth. Wrapping the meat with the chitosan/NC polymer helped to increase the shelf life of the meat. The incorporation of EOs added extra activity to the biocomposites, further delaying the meat deterioration process, by halting the lipid oxidation and the Enterobactereaceae growth until the 9th day. The composition of both EOs was similar, with the main components contributing to the increased activity of the biopolymers being geranial and neral. The performance of ACEO surpassed that of CCEO, namely on the Enterobactereaceae growth. This trend may be associated with ACEO’s higher phenolic content and the higher antioxidant activity of the compounds released by the ACEO biopolymers.","PeriodicalId":18139,"journal":{"name":"Macromol","volume":"147 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136356583","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

Stability Aspects of UV-Curable Prints on Pressure-Sensitive Labels Facestock Made from Agro-Industrial By-Products 农工副产品压敏标签表面紫外光固化印刷品的稳定性

Macromol Pub Date : 2023-10-07 DOI: 10.3390/macromol3040039

Ivan Malenica, Marina Golik Krizmanić, Marina Vukoje, Rahela Kulčar, Katarina Itrić Ivanda

{"title":"Stability Aspects of UV-Curable Prints on Pressure-Sensitive Labels Facestock Made from Agro-Industrial By-Products","authors":"Ivan Malenica, Marina Golik Krizmanić, Marina Vukoje, Rahela Kulčar, Katarina Itrić Ivanda","doi":"10.3390/macromol3040039","DOIUrl":"https://doi.org/10.3390/macromol3040039","url":null,"abstract":"During its life cycle, packaging comes into contact with various substances and even those it protects. Thus, for example, oil, water, and alcohol, if spilled on the packaging, can damage its functionality. In addition to exposure to chemicals, graphic products (packaging) can be exposed to moisture and UV radiation, which can negatively affect their stability during transport, storage, and handling. The choice of printing substrate can directly affect the stability of prints against different degrading influences. This paper explores the stability of thermochromic (TC) and conventional offset printing inks printed on environmentally friendly printing substrates intended for packaging applications (labelling). Results have confirmed that used printing substrates and printing inks give prints good rub resistance, but somewhat lower stability in terms of ethanol, water, and UV radiation. The choice of printing substrate can directly affect the stability of prints against different degrading influences. The resistance of prints to oil cannot be clearly defined since the samples were altered with the coloration of the oil. It can only be stated that oil reduced the functionality of the TC prints given that the samples were colored by the oil itself.","PeriodicalId":18139,"journal":{"name":"Macromol","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135301089","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

Thermal and Mechanical Properties of Guaiacol–Fatty Acid–Sulfur Composites 愈创木酚-脂肪酸-硫复合材料的热力学性能

Macromol Pub Date : 2023-09-25 DOI: 10.3390/macromol3040038

Charini P. Maladeniya, Nawoda L. Kapuge Dona, Ashlyn D. Smith, Rhett C. Smith

{"title":"Thermal and Mechanical Properties of Guaiacol–Fatty Acid–Sulfur Composites","authors":"Charini P. Maladeniya, Nawoda L. Kapuge Dona, Ashlyn D. Smith, Rhett C. Smith","doi":"10.3390/macromol3040038","DOIUrl":"https://doi.org/10.3390/macromol3040038","url":null,"abstract":"A series of six composites was prepared from the reaction of lignin-derived guaiacol, fatty acids, and sulfur. In this preparation, the organic comonomers undergo C–S bond-forming reactions to establish a highly crosslinked network material in which some non-covalently incorporated sulfur species are also entrapped. Both monounsaturated oleic acid and diunsaturated linoleic acid were used as fatty acid components to assess the influence of their unsaturation levels on composite properties. The ratio of organics and the proportion of sulfur (70 or 80 wt%) was also varied to assess the effect on thermal, morphological, and mechanical properties. Thermogravimetric analysis showed that composites exhibited good thermal stability up to ~220 °C. Differential scanning calorimetry revealed that the materials generally exhibit melting features for entrapped cyclo-S8, cold crystallization features for some materials, and a composition-dependent glass transition temperature. The flexural and compressive strengths of the composites revealed that some of the composites exhibit strengths significantly higher than those required of Portland cements used in residential housing fabrication and may be more sustainable structural materials. The thermal and mechanical properties could be tailored by changing the degree of unsaturation of the fatty acid comonomer or by altering the percentage of fatty acid in the monomer feed. The highest mechanical strength was achieved with greater amounts of monounsaturated oleic acid comonomer.","PeriodicalId":18139,"journal":{"name":"Macromol","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135816939","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

Materials, Weaving Parameters, and Tensile Responses of Woven Textiles 织物的材料、织造参数和拉伸响应

Macromol Pub Date : 2023-09-21 DOI: 10.3390/macromol3030037

Antonella Patti, Domenico Acierno

{"title":"Materials, Weaving Parameters, and Tensile Responses of Woven Textiles","authors":"Antonella Patti, Domenico Acierno","doi":"10.3390/macromol3030037","DOIUrl":"https://doi.org/10.3390/macromol3030037","url":null,"abstract":"Fabrics have been recognized as a necessary component of daily life due to their involvement in garments, home textiles, and industrial textiles. The mechanical performance of textiles was considered essential to meet the end-user requirements for strength and durability. The purpose of this work was to provide an overview of the textile structures and tensile strengths of woven textiles. Different types of textile structures, depending on the weaving methods (woven, braided, knitted, non-woven) and the most common architectures of woven fabrics (plain weave, twill and sateen), were presented. Common materials constituting the textiles’ structures and a comparison in terms of the density, Young’s modulus and tensile strength between natural (plant-based, animal-based, and mineral-based) and synthetic fibers were reported. The mechanical properties of woven textiles were presented for neat and coated textiles, primarily in terms of the tensile strength. Depending on the cases, typical regions in the load–displacement curve (i.e., crimp, elastic, non-linear failure, thread fracture) were highlighted. The impact of the architecture, yarn distance and size, and yarn twisting on the tensile strength of woven fabrics was then illustrated.","PeriodicalId":18139,"journal":{"name":"Macromol","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136236792","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

Molecular Dynamics Calculations for the Temperature Response of Poly(alkylated tri(ethylene oxide)isocyanate) Aqueous Solution 聚烷基化三(环氧乙烷)异氰酸酯水溶液温度响应的分子动力学计算

Macromol Pub Date : 2023-09-08 DOI: 10.3390/macromol3030036

Shunsuke Mizutani, Shunya Kita, Naoya Sakai, Takuya Yamamoto, Andrej Koleżyński, T. Kakuchi, Shin-ichiro Sato

{"title":"Molecular Dynamics Calculations for the Temperature Response of Poly(alkylated tri(ethylene oxide)isocyanate) Aqueous Solution","authors":"Shunsuke Mizutani, Shunya Kita, Naoya Sakai, Takuya Yamamoto, Andrej Koleżyński, T. Kakuchi, Shin-ichiro Sato","doi":"10.3390/macromol3030036","DOIUrl":"https://doi.org/10.3390/macromol3030036","url":null,"abstract":"Aqueous solutions of conventional temperature-responsive amphiphilic polymers undergo a coil–globule conformational transition around the lower critical solution temperature (LCST) that causes the polymer surfaces to become hydrophobic and the polymers to aggregate together. Isocyanate polymers with alkylated oligo(ethylene oxide) side chains are expected to have rigid main chains and, thus, do not undergo the coil–globule structural transition, but they have recently been reported to exhibit temperature-responsive properties. In this study, molecular dynamics was used to calculate the agglomeration tendencies of two chains of poly(alkylated tri(ethylene oxide)isocyanate) (PRTEOIC, where R = methyl (Me) or ethyl (Et)) in aqueous solution to elucidate the LCST phenomenon in the absence of coil–globule conformational transition. Our MD simulations showed that aggregation also occurs in rod polymers. Furthermore, we found that both (PMeTEOIC)2 and (PEtTEOIC)2 showed parallel agglomeration of the two molecular chains with increasing temperature, but only (PMeTEOIC)2 showed a metastable T-shaped agglomeration in the middle temperature range. The crossing-point temperature (TCRP) at which the density of the first hydrophobic hydration shell around the sidechain alkyl group equals the bulk water density is a useful indicator for predicting the LCST of rod polymers with dense side chains terminated by alkyl groups.","PeriodicalId":18139,"journal":{"name":"Macromol","volume":"51 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73808839","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

Thermal Treatment of a Commercial Polycyanoacrylate Adhesive Addressed for Instant Glass Restoration, for Investigating Its Ageing Tolerance 一种用于玻璃即时修复的商用聚氰丙烯酸酯胶粘剂的热处理及其耐老化性能的研究

Macromol Pub Date : 2023-09-04 DOI: 10.3390/macromol3030035

Evangelia C. Vouvoudi, George A. Tamias, Evangelia A. Chatzicharistou, D. Achilias

{"title":"Thermal Treatment of a Commercial Polycyanoacrylate Adhesive Addressed for Instant Glass Restoration, for Investigating Its Ageing Tolerance","authors":"Evangelia C. Vouvoudi, George A. Tamias, Evangelia A. Chatzicharistou, D. Achilias","doi":"10.3390/macromol3030035","DOIUrl":"https://doi.org/10.3390/macromol3030035","url":null,"abstract":"In the present study, the results of an experimental work on the thermal endurance and decomposition products of the commercial restorative adhesive Loctite® Super Attak Glass, being applied on glass surfaces, are presented. The clarity of the cyanoacrylate polymer and its rapid anionic polymerization reaction are outcomes of the chemistry of the monomer and its activity. First, evaluation of the reversibility of this glue was examined through the solubility tests. It was verified that the adhesive is reversible since it is diluted in several solvents. Later, by applying pyrolysis conjugated with gas chromatography and mass spectrometry (Py–GC/MS), the thermal profile of the polymer is recorded in its neat form and in its aged state (weathered under the influence of UV-irradiation or thermal treatment at 50 and 75 °C). The decomposition products are detected and identified and, finally, possible reactions are investigated. Emphasis is placed on those that could be considered harmful to cultural heritage materials and objects. The fragments by the pyrolytic reactions identified mainly concern esters, less aldehydes and alcohols, small nitrogen compounds, and in some cases unsaturated hydrocarbons with higher molecular weight. Additives such as radical polymerization inhibitors and stabilizers, as well as some plasticizers, were also detected.","PeriodicalId":18139,"journal":{"name":"Macromol","volume":"196 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77155735","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

Potential Agricultural Uses of Micro/Nano Encapsulated Chitosan: A Review 微纳米壳聚糖在农业上的潜在应用

Macromol Pub Date : 2023-08-29 DOI: 10.3390/macromol3030034

Melissa García-Carrasco, Octavio Valdez-Baro, L. A. Cabanillas-Bojórquez, M. Bernal-Millán, María M. Rivera-Salas, E. P. Gutiérrez-Grijalva, J. B. Heredia

{"title":"Potential Agricultural Uses of Micro/Nano Encapsulated Chitosan: A Review","authors":"Melissa García-Carrasco, Octavio Valdez-Baro, L. A. Cabanillas-Bojórquez, M. Bernal-Millán, María M. Rivera-Salas, E. P. Gutiérrez-Grijalva, J. B. Heredia","doi":"10.3390/macromol3030034","DOIUrl":"https://doi.org/10.3390/macromol3030034","url":null,"abstract":"Chitosan is a non-toxic, biodegradable, and biocompatible natural biopolymer widely used as a nanocarrier, emulsifier, flocculant, and antimicrobial agent with potential applications in industry. Recently, chitosan has been used as an encapsulating agent for bioactive plant compounds and agrochemicals by different technologies, such as spray-drying and nanoemulsions, to enhance antimicrobial activity. Chitosan nanocomposites have been shown to increase potential biocidal, antibacterial, and antifungal activity against pathogens, presenting higher stability, decreasing degradation, and prolonging the effective concentration of these bioactive compounds. Therefore, the objective of this work is to review the most outstanding aspects of the most recent developments in the different methods of encapsulation of bioactive compounds (phenolic compounds, essential oils, among others) from plants, as well as the applications on phytopathogenic diseases (fungi and bacteria) in vitro and in vivo in cereal, fruit and vegetable crops. These perspectives could provide information for the future formulation of products with high efficacy against phytopathogenic diseases as an alternative to chemical products for sustainable agriculture.","PeriodicalId":18139,"journal":{"name":"Macromol","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72780625","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: 1

Recent Advances in Electrospun Fibers for Biological Applications 生物电纺纤维研究进展

Macromol Pub Date : 2023-08-16 DOI: 10.3390/macromol3030033

Bénédicte Fromager, Emilie Marhuenda, Benjamin Louis, N. Bakalara, J. Cambedouzou, David Cornu

{"title":"Recent Advances in Electrospun Fibers for Biological Applications","authors":"Bénédicte Fromager, Emilie Marhuenda, Benjamin Louis, N. Bakalara, J. Cambedouzou, David Cornu","doi":"10.3390/macromol3030033","DOIUrl":"https://doi.org/10.3390/macromol3030033","url":null,"abstract":"Electrospinning is a simple and versatile method to generate nanofibers. Remarkable progress has been made in the development of the electrospinning process. The production of nanofibers is affected by many parameters, which influence the final material properties. Electrospun fibers have a wide range of applications, such as energy storage devices and biomedical scaffolds. Among polymers chosen for biological scaffolds, such as PLA or collagen, polyacrylonitrile (PAN) has received increasing interest in recent years due to its excellent characteristics, such as spinnability, biocompatibility, and commercial viability, opening the way to new applications in the biotechnological field. This paper provides an overview of the electrospinning process of a large range of polymers of interest for biomedical applications, including PLA and PEO. It covers the main parameters and operation modes that affect nanofiber fabrication. Their biological applications are reviewed. A focus is placed on PAN fiber formation, functionalization, and application as scaffolds to allow cell growth. Overall, nanofiber scaffolds appear to be powerful tools in medical applications that need controlled cell culture.","PeriodicalId":18139,"journal":{"name":"Macromol","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82604880","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