Search results: Found 3

Listing 1 - 3 of 3
Sort by
Advances in Chitin/Chitosan Characterization and Applications

Authors: ---
ISBN: 9783038978022 9783038978039 Year: Pages: 414 DOI: 10.3390/books978-3-03897-803-9 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Biology --- Biochemistry
Added to DOAB on : 2019-04-25 16:37:17
License:

Loading...
Export citation

Choose an application

Abstract

Functional advanced biopolymers have received far less attention than renewable biomass (cellulose, rubber, etc.) used for energy production. Among the most advanced biopolymers known is chitosan. The term chitosan refers to a family of polysaccharides obtained by partial de-N-acetylation from chitin, one of the most abundant renewable resources in the biosphere. Chitosan has been firmly established as having unique material properties as well as biological activities. Either in its native form or as a chemical derivative, chitosan is amenable to being processed—typically under mild conditions—into soft materials such as hydrogels, colloidal nanoparticles, or nanofibers. Given its multiple biological properties, including biodegradability, antimicrobial effects, gene transfectability, and metal adsorption—to name but a few—chitosan is regarded as a widely versatile building block in various sectors (e.g., agriculture, food, cosmetics, pharmacy) and for various applications (medical devices, metal adsorption, catalysis, etc.). This Special Issue presents an updated account addressing some of the major applications, including also chemical and enzymatic modifications of oligos and polymers. A better understanding of the properties that underpin the use of chitin and chitosan in different fields is key for boosting their more extensive industrial utilization, as well as to aid regulatory agencies in establishing specifications, guidelines, and standards for the different types of products and applications.

Keywords

aerogels --- chitosan --- ionic liquids --- ionogels --- zinc–chitosan complexes --- characterization --- bio-sorbent --- phosphate --- adsorption --- mechanism --- thermodynamic --- chitosan --- hydrogel --- phase transition --- gelation mechanism --- chitosan --- defense responses --- fruits --- nanoparticles --- plant growth --- pesticides --- Boron --- chitosan --- iron(III) hydroxide --- neodymium --- sorption --- chitin --- chitosan --- chitosan derivative --- chitin derivative --- oral care --- skin care --- hear care --- marine resources --- over-the counter-drug --- polymer carrier --- chitin --- chitosan --- nanostructured biomaterial --- polymer --- self-masking nanosphere lithography --- cicada --- chitosan --- self-assembled --- polyelectrolyte complex --- nanoparticle --- drug delivery --- Citrobacter --- biosynthesis --- bioflocculant --- chitosan --- metabolic pathway --- PEO/chitosan blend --- swelling --- mechanical properties --- wet and dried states --- chitosan --- biological activity --- medical applications --- chitosan --- PCL --- strontium --- scaffolds --- craniofacial engineering --- chitin --- chitosan --- derivatization --- controlled functionalization --- click chemistry --- graft copolymer --- cyclodextrin --- dendrimer --- ionic liquids --- chitin deacetylases --- chitosan --- chitooligosaccharides --- carbohydrate esterases --- structure --- substrate specificity --- deacetylation pattern --- binary --- chitosan --- desorption --- iron --- lead --- mercury --- salt effects --- single --- sorption competition --- chitosan supported copper --- heterogeneous catalyst --- organosilicon compound --- easily recyclable --- chitosan --- papermaking --- wet-end --- coating --- wastewater --- ionic cross-linking --- eco-friendly formulations --- thermal transition sol-gel --- drug delivery systems --- MTDSC --- DSC --- gene delivery --- non-viral vectors --- chitosan structure --- pDNA --- siRNA --- TEOS --- methylene blue --- chitosan --- modelling --- cross-linking --- interpenetrating --- XRD --- FTIR

Siloxane-Based Polymers

Author:
ISBN: 9783038971252 / 9783038971269 Year: Pages: 188 DOI: 10.3390/books978-3-03897-126-9 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- Chemical Engineering
Added to DOAB on : 2019-08-28 11:21:27
License:

Loading...
Export citation

Choose an application

Abstract

This book, a collection of 12 original contributions and 4 reviews, provides a selection of the most recent advances in the preparation, characterization, and applications of polymeric nanocomposites comprising nanoparticles. The concept of nanoparticle-reinforced polymers came about three decades ago, following the outstanding discovery of fullerenes and carbon nanotubes. One of the main ideas behind this approach is to improve the matrix mechanical performance. The nanoparticles exhibit higher specific surface area, surface energy, and density compared to microparticles and, hence, lower nanofiller concentrations are needed to attain properties comparable to, or even better than, those obtained by conventional microfiller loadings, which facilitates processing and minimizes the increase in composite weight. The addition of nanoparticles into different polymer matrices opens up an important research area in the field of composite materials. Moreover, many different types of inorganic nanoparticles, such as quantum dots, metal oxides, and ceramic and metallic nanoparticles, have been incorporated into polymers for their application in a wide range of fields, ranging from medicine to photovoltaics, packaging, and structural applications.

Keywords

fabrication --- multielectrode array (MEA) --- PDMS --- PDMS etching --- plateau-shaped electrode --- recessed electrode --- spinal cord signal recording --- underexposure --- organosilane --- quartz microcrystal --- encapsulant --- refractive index --- thermal conductivity --- poly(dimethylsiloxanes) --- surface modification --- nanosilica --- diethyl carbonate --- carbon content --- morphology --- coatings --- fillers --- hybrid hydrogel --- MAPOSS --- mechanical properties --- swelling --- drug release --- dental resin --- methacryl POSS --- shrinkage --- hardness --- scratch resistance --- ceramizable silicone rubber --- borate --- halloysite --- composite --- ceramizable mechanism --- polysiloxanes --- mortar --- basalt fibre --- roughness --- surface free energy --- poly(ethylene glycol) (PEG) --- hydrophilic --- non-releasable --- polydimethylsiloxane --- coatings --- cross-linking --- surface --- amphiphilic --- anti-bioadhesion --- hyperbranched poly(methylhydrosiloxanes) --- hydrolytic polycondensation --- 29Si-NMR --- topology of polysiloxane chains --- polyhedral oligomeric silsesquioxanes --- high molecular weight --- nanoparticles --- PDMS --- sugar templating process --- 3D porous network --- thermal stability --- TG-FTIR --- X-ray (Micro-CT) microtomography --- sol-gel --- hybrids --- chlorogenic acid --- bioactivity --- FTIR --- TG --- polysiloxanes --- theranostics --- drug delivery --- nanomedicine --- PDMS --- silicon --- ultraviolet (UV) curable coatings --- low surface energy materials --- fluorinated siloxane resin

Polymeric Materials: Surfaces, Interfaces and Bioapplications

Authors: --- --- --- --- et al.
ISBN: 9783038979623 / 9783038979630 Year: Pages: 342 DOI: 10.3390/books978-3-03897-963-0 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Physics (General)
Added to DOAB on : 2019-06-26 08:44:06
License:

Loading...
Export citation

Choose an application

Abstract

This book collects the articles published in the Special Issue “Polymeric Materials: Surfaces, Interfaces and Bioapplications”. It shows the advances in polymeric materials, which have tremendous applications in agricultural films, food packaging, dental restoration, antimicrobial systems, and tissue engineering. These polymeric materials are presented as films, coatings, particles, fibers, hydrogels, or networks. The potential to modify and modulate their surfaces or their content by different techniques, such as click chemistry, ozonation, breath figures, wrinkle formation, or electrospray, are also explained, taking into account the relationship between the structure and properties in the final application. Moreover, new trends in the development of such materials are presented, using more environmental friendly and safe methods, which, at the same time, have a high impact on our society.

Keywords

corn stalk fiber --- friction composite --- friction and wear --- worn surface morphology --- antifouling coatings --- biofouling --- natural biofilms --- single-stranded conformation polymorphism --- polydimethylsiloxane --- multidimensional scale analysis --- antimicrobial coatings --- porous surfaces --- breath figures --- antimicrobial polymer --- coatings --- hydrogel --- protein-repellent polymer --- surface-attached polymer network --- polymer cross-linking --- alginate modification --- calcium chloride --- microparticles --- spray drying --- prolonged drug release --- gradient wrinkles --- UV/ozone --- irradiance --- polymeric composites --- bonding agents --- antibacterial --- oral biofilms --- periodontal pathogens --- caries inhibition --- recycling --- polypropylene --- biodegradable polymers --- degradation --- inmiscibility --- hemicelluloses --- chitosan --- composite films --- oxygen barrier property --- food packaging --- nanosecond laser surface modification --- ABS (Acrylonitrile-Butadiene-Styrene) --- surface wettability --- superhydrophobic --- superhydrophilic --- poly(x-chlorostyrene) --- honeycomb --- breath figures --- conformational entropy --- spinal anatomy --- intervertebral disc --- degenerative disc disease --- herniated disc --- spinal fusion --- total disc replacement --- tissue engineering --- Electrically conductive polymers --- Electroactive biomaterials --- Electrical stimulation --- Smart composites --- Bioelectric effect --- Drug delivery --- Artificial muscle --- bio-based --- fossil --- hybrids --- blends --- packaging --- bio-based polymers --- antimicrobial --- biodegradable --- sustainable --- eco-friendly --- graphene oxide --- chitosan --- composites --- scaffolds --- tissue engineering --- surface modification/functionalization --- surface segregation --- micro- and nanopatterned films --- blends and (nano)composites --- coatings --- surface wettability --- stimuli-responsive materials/smart surfaces --- bioapplications

Listing 1 - 3 of 3
Sort by
Narrow your search

Publisher

MDPI - Multidisciplinary Digital Publishing Institute (3)


License

CC by-nc-nd (3)


Language

eng (3)


Year
From To Submit

2019 (3)