Solvothermal synthesis of hydrophobic chitin–polyhedral oligomeric silsesquioxane (POSS) nanocomposites

Wysokowski, Marcin; Materna, Katarzyna; Walter, Juliane; Petrenko, Iaroslav; Stelling, Allison L.; Bazhenov, Vasilii V.; Kłapiszewski, Łukasz; Szatkowski, Tomasz; Lewandowska, Olga; Stawski, Dawid; Молодцов, С. Л.; Maciejewski, Hieronim; Ehrlich, Hermann; Jesionowski, Teofil

doi:10.1016/j.ijbiomac.2015.04.014

Cited by 33 publications

(16 citation statements)

References 54 publications

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“…So far, these are the best images that one could derive from SEM imaging. Here we also noted that the images reported elsewhere by other researchers reveals POSS in large particulates on the order of 1 µm, when blended in a chitin matrix [8]. Note that the ribbon-like profile of the fibre cross section was the result of lateral compressive forces that were generated by the extruded fibre by winding around a bobbin during the wet spinning process.…”

Section: Fracture Morphologysupporting

confidence: 80%

“…This study is concerned with chitosan (CS) biopolymer, a linear polysaccharide that can be derived from the alkaline N-deacetylation of chitin [4,5]. Chitin is the main structural component of the shells of crustaceans, the exoskeletons of insects and the cell walls of fungi [4][5][6][7][8]. CS polysaccharide is a copolymer comprising β-(1-4)-2-amino-D-glucose (deacetylated unit) and β-(1-4)-2-acetamido-D-glucose (acetylated unit) [4,5].…”

Section: Introductionmentioning

confidence: 99%

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A Comparative Analysis of the Reinforcing Efficiency of Silsesquioxane Nanoparticles versus Apatite Nanoparticles in Chitosan Biocomposite Fibres

Wang

Pasbakhsh²,

Silva

et al. 2017

J. Compos. Sci.

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A comparative analysis of the effects of polyhedral oligomeric silsesquioxane (POSS) and hydroxyapatite (HA) for reinforcing chitosan (CS) is given here. Wet-spun CS nanocomposite fibres, blended with HA or POSS nanoparticles, at varying concentrations ranging from 1 to 9% (w/w) were stretched until rupture to determine the mechanical properties related to the elasticity (yield strength and strain, stiffness, resilience energy) and fracture (fracture strength strain and toughness) of the composite. Two-factor analysis of variance of the data concluded that only the fracture-related properties were sensitive to interaction effects between the particle type and concentration. When particle type is considered, the stiffness and yield strength of CS/POSS fibres are higher than CS/HA fibres-the converse holds for yield strain, extensibility and fracture toughness. With regards to sensitivity to particle concentration, stiffness and yield strength reveal trending increase to a peak value (the optimal particle concentration associated with the critical aggregation) and trending decrease thereafter, with increasing particle concentration. Although fracture strength, strain at fracture and fracture toughness are also sensitive to particle concentration, no apparent trending increase/decrease is sustained over the particle concentration range investigated here. This simple study provides further understanding into the mechanics of particle-reinforced composites-the insights derived here concerning the optimized mechanical properties of chitosan composite fibre may be further developed to permit us to tune the mechanical properties to suit the biomedical engineering application.

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Section: Fracture Morphologysupporting

confidence: 80%

Section: Introductionmentioning

confidence: 99%

A Comparative Analysis of the Reinforcing Efficiency of Silsesquioxane Nanoparticles versus Apatite Nanoparticles in Chitosan Biocomposite Fibres

Wang

Pasbakhsh²,

Silva

et al. 2017

J. Compos. Sci.

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“…So far, a variety of functional POSS derivatives have been developed. Polymerizable POSS macromers, such as vinyl-functionalized POSS and oxirane-functionalized POSS, have been employed to copolymerize with organic monomers to afford a variety of polymer/POSS nanocomposites [15][16][17][18][19][20][21][22][23][24][25][26][27]. Polymerizable POSSs make a covalent attachment to a polymer matrix possible, and POSS units are well-dispersed in a polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

Green Nanocomposites from Renewable Plant Oils and Polyhedral Oligomeric Silsesquioxanes

Tsujimoto

Uyama

Kobayashi

et al. 2015

Metals

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Abstract:Green nanocomposites based on renewable plant oils and polyhedral oligomeric silsesquioxanes (POSS) have been developed. An acid-catalyzed curing of epoxidized plant oils with oxirane-containing POSS derivatives produced transparent nanocomposite coatings with high gloss surface, in which the organic and inorganic components were linked via covalent bonds. The hardness and mechanical strength were improved by the incorporation of the POSS unit into the organic polymer matrix. Nanostructural analyses of the nanocomposites showed the formation of homogeneous structures at the micrometer scale. On the other hand, such improvements of the coating and mechanical properties were not observed in the composite without covalent bonds between the plant oil-based polymer and POSS unit. The study demonstrates the correlation between the nanostructure of composites and macroscopic properties.

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“…POSSs have considerable importance owing to their excellent thermal, mechanical, optical and electrical properties [2][3][4][5][6] due to both their nanosized and cubic structure and inorganic cage [7], which allow their employment in several fields: as, for example, sensors [8], electrolyte for ion exchange membrane in fuel cell applications [9,10], novel curing agent and/or filler for epoxy system [11,12]. In the last years POSSs acquired further increasing importance due to their employment as fillers for polymer based nanocomposites [13,14] and new methods for combination of POSS and polymers has been proposed [15]. The most common POSSs for this use are those with n = 8, whose diameter lies in the 1-3 nm range approximately [16,17].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Thermal Behaviour of Novel Aliphatic/Aromatic Hepta-Cyclopentyl Bridged Polyhedral Oligomeric Silsesquioxanes (POSSs)/Polystyrene (PS) Nanocomposites

Blanco

Abate

Bottino

et al. 2015

J Inorg Organomet Polym

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The resistance to the thermal degradation of some polystyrene (PS) based nanocomposites, containing as filler novel aliphatic and aromatic hepta-cyclopentyl bridged polyhedral oligomeric silsesquioxanes (POSSs), was evaluated in both inert and oxidative atmospheres. The fillers were formed by two identical silicon cages R 7 (SiO 1.5 ) 8 (R = cyclopentyl) linked to several aliphatic [-(CH 2 ) 2 -, -(CH 2 ) 6 -and -(CH 2 ) 10 -] and aromatic (Ar, Ar-Ar, Ar-O-Ar and Ar-S-Ar) bridges, where Ar = p-C 6 H 4 . Nanocomposites were prepared by in situ polymerization of styrene in the presence of 5 % w/w of appropriate POSS. The actual filler content in the products obtained, checked by 1 H NMR spectroscopy, resulted in all cases slightly higher than in starting mixtures. The glass transition temperature (T g ) was also determined by Differential Scanning Calorimetry. The degradation of nanocomposites was carried out into a thermobalance and the temperatures at 5 % mass loss (T 5 % ) were determined to evaluate the resistance to the thermal degradation which resulted, for the compounds here studied, higher not only than PS, but also than those of the nanocomposites filled with the corresponding hepta-isobutyl POSSs. The results were compared and discussed and suggested that the increments of resistance to thermal degradation in respect to neat PS (T 5 % of nanocomposite -T 5 % of PS) obey to an additivity group law.

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Solvothermal synthesis of hydrophobic chitin–polyhedral oligomeric silsesquioxane (POSS) nanocomposites

Cited by 33 publications

References 54 publications

A Comparative Analysis of the Reinforcing Efficiency of Silsesquioxane Nanoparticles versus Apatite Nanoparticles in Chitosan Biocomposite Fibres

A Comparative Analysis of the Reinforcing Efficiency of Silsesquioxane Nanoparticles versus Apatite Nanoparticles in Chitosan Biocomposite Fibres

Green Nanocomposites from Renewable Plant Oils and Polyhedral Oligomeric Silsesquioxanes

Synthesis and Thermal Behaviour of Novel Aliphatic/Aromatic Hepta-Cyclopentyl Bridged Polyhedral Oligomeric Silsesquioxanes (POSSs)/Polystyrene (PS) Nanocomposites

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