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Natural Fiber-Reinforced Hybrid Composites

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ISBN: 9783039281541 9783039281558 Year: Pages: 104 DOI: 10.3390/books978-3-03928-155-8 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Physics (General)
Added to DOAB on : 2020-04-07 23:07:09
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In the last few decades, natural fibers have received growing attention as an alternative to the synthetic fibers used in the reinforcement of polymeric composites, thanks to their specific properties, low price, health advantages, renewability, and recyclability. Furthermore, natural fibers have a CO2-neutral life cycle, in contrast to their synthetic counterparts. As is widely known, natural fibers also possess some drawbacks, e.g., a hydrophilic nature, low and variable mechanical properties, poor adhesion to polymeric matrices, high susceptibility to moisture absorption, low aging resistance, etc. This implies that their applications are limited to non-structural interior products. To overcome this problem, the hybridization of natural fibers with synthetic ones (i.e., glass, carbon, and basalt) or different natural fibers can be a solution. For this reason, extensive research concerning natural–synthetic and natural–natural hybrid composites has been done in the last years. In this context, this book aims to collect some interesting papers concerning the use of natural fibers together with synthetic ones with the aim of obtaining hybrid structures with good compromise between high properties (e.g., mechanical performances, thermal behavior, aging tolerance in humid or aggressive environments, and so on) and environment care.

Advanced Flame Retardant Materials

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ISBN: 9783039283507 9783039283514 Year: Pages: 190 DOI: 10.3390/books978-3-03928-351-4 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Physics (General) --- Science (General)
Added to DOAB on : 2020-04-07 23:07:09
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Recent disasters caused by the spread of fire in buildings and in transportations remind us of the importance of fire protection. Using flame-retardant materials is one important element of the firefighting strategy, which aims to prevent fire development and propagation. These materials are used in different applications, such as in textiles, coatings, foams, furniture, and cables. The development of more efficient and environmentally friendly flame-retardant additives is an active multidisciplinary approach that has attracted a great deal of interest. Studies have aimed at the development of new, sustainable, and flame-retardant additives/materials, providing high performance and low toxicity. Also studied were their properties during ageing and recycling, as well as modeling physical and chemical processes occuring before ignition and during their combustion. The development of sustainable flame retardants and understanding their modes of action provide a strong link between these topics and cover many fields from organic chemistry, materials engineering, and toxicology, to physics and mathematics.

Polymeric Systems as Antimicrobial or Antifouling Agents

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ISBN: 9783039284566 / 9783039284573 Year: Pages: 400 DOI: 10.3390/books978-3-03928-457-3 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Social Sciences --- Sociology
Added to DOAB on : 2020-06-09 16:38:57
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The rapid increase in the emergence of antibiotic-resistant bacterial strains, combined with a dwindling rate of discovery of novel antibiotic molecules, has created an alarming issue worldwide. Although the occurrence of resistance in microbes is a natural process, the overuse of antibiotics is known to increase the rate of resistance evolution. Under antibiotic treatment, susceptible bacteria inevitably die, while resistant microorganisms proliferate under reduced competition. Therefore, the out-of-control use of antibiotics eliminates drug-susceptible species that would naturally limit the expansion of resistant species. In addition, the ability of many microbial species to grow as a biofilm has further complicated the treatment of infections with conventional antibiotics. A number of corrective measures are currently being explored to reverse or slow antibiotic resistance evolution, Among which one of the most promising solutions is the development of polymer-based antimicrobial compounds. In this Special Issue, different polymer systems able to prevent or treat biofilm formation, including cationic polymers, antibacterial peptide-mimetic polymers, polymers or composites able to load and release bioactive molecules, and antifouling polymers able to repel microbes by physical or chemical mechanisms are reported. Their applications in the design and fabrication of medical devices, in food packaging, and as drug carriers is investigated.

Keywords

cationic polymers --- imidization --- quaternization --- antimicrobial properties --- hemolytic activity --- coatings from nanoparticles --- biocompatible polymer --- antimicrobial polymer --- dynamic light scattering --- coatings wettability --- microbicidal coatings --- bacteria viability --- bactericidal coatings --- Escherichia coli --- Staphylococcus aureus --- Acinetobacter baumannii --- multidrug-resistant --- antimicrobial peptide --- antibiofilm activity --- physiological salt --- biofilm --- anti-biofilm surface --- surface functionalization --- ?-chymotrypsin --- proteinase --- antimicrobial polymers --- quaternary ammonium --- 2-hydroxyethyl methacrylate --- thermal stability --- polymers --- antibacterial --- drug delivery --- periodontitis --- periodontal biofilms --- polyamide 11 --- antibacterial --- polymeric biocide --- thermal stability --- biofilm --- antifouling --- copper paint --- additives --- biofilm --- lipopeptides --- biofilm --- persister cells --- ocular infections --- biofilm on contact lenses --- cuprous oxide nanoparticles --- linear low-density polyethylene --- composites --- adhesives --- antibacterial activity --- water disinfection --- active packaging --- antimicrobial peptides --- food shelf-life --- foodborne pathogens --- plastic materials --- antibacterial peptides --- halictine --- circular dichroism --- fluorescence --- infrared spectroscopy --- segmented polyurethanes --- polyethylene glycol --- microbial biofilm --- antifouling materials --- medical device-related infections --- wound dressings --- additive manufacturing --- antibacterial polymers --- biocompatible systems --- drug delivery systems --- 3D printing --- amorphous materials --- ordered mesoporous silica --- sol-gel preparation --- drug carrier --- multifunctional hybrid systems --- olive mill wastewater --- antibacterial properties --- layered double hydroxides --- bionanocomposites --- acrylates --- antibacterial activity --- copolymerization --- polymeric films --- polymerizable quaternary ammonium salts --- quaternary ammonium salts --- UV-induced polymerization --- antimicrobial resistance --- antimicrobial polymers --- ESKAPE pathogens --- anti-biofilm surfaces --- polymeric surfaces --- biofilm methods --- biofilm analysis --- biofilm devices --- n/a

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2020 (3)