Effect of the dispersive method in the preparation of the polyurethane/hydrotalcite nanocomposites by in situ polymerization

Carmo, Danieli M.; Oliveira, Márcia G.; Soares, Bluma G.

doi:10.1016/j.clay.2014.07.027

Cited by 18 publications

(6 citation statements)

References 27 publications

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“…This system is employed when high shear forces are required for homogenization purposes [35]. This method was studied to optimize the dispersion of one polymer in order to obtain composites and it promises to be more efficient, when compared to the ultrasound bath and sonicator [36]. If chitosan is commonly described as a ''single'' polysaccharide, it is in fact a wide class of different polymers with various degrees of deacetylation and molecular weights.…”

Section: Resultsmentioning

confidence: 99%

Influence of Homogenization Technique and Blend Ratio on Chitosan/Alginate Polyelectrolyte Complex Properties

et al. 2017

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This is an author's version published in: http://oatao.univ-toulouse.fr/24521 Ahstract Polyelectrolyte complex (PEC) films were pre pared from chitosan (CHI) and alginate (ALG) which are polymers of opposite charge. Two homogenization tech niques and two ratios of ALG CHI blends were compared: mechanical agitation under vacuum (ALG CHI ST) or agitation by high twbulence (ALG CHI UT) and 50'50 or 63/37 ratios. Surface and structure of PEC films are affected by the homogenization technique while the swel ling percentage is only affected by polymer ratio. The homogenization ratio does not seem to infl uence in vitro cell proliferation. Results show that the UT homogeniza tion technique with a 63/37 ratio, which gives films with a smooth, homogeneous surface and a higher rate of enzy matic resistance, is more efficient for cell proliferation and viability. These first results confirm the potential use of ALG CH I films for surgery application.

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Section: Resultsmentioning

confidence: 99%

Influence of Homogenization Technique and Blend Ratio on Chitosan/Alginate Polyelectrolyte Complex Properties

et al. 2017

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“…In numerous studies, POSS was used effectively as a chain extender for the replacement of partial diol monomer at polymerization stage of polyurethane (Lewicki et al, 2014;Liu & Zheng, 2005;Lopes et al, 2012;Mahapatra et al, 2012;Markovic et al, 2013;Zhang et al, 2006;Zhang et al, 2011;Zhao et al, 2019). Moreover, POSS promotes flame retardancy (Bourbigot et al, 2009;Kavuncuoglu et al, 2019;Kim et al, 2014;Michalowski & Pielichowski, 2018), self-healing (ehera et al, 2018;Diao et al, 2015), scratch protection (Ghermezcheshme et al, 2015;Lai et al, 2009), thermal shielding (Carmo et al, 2014;Janowski & Pielichowski, 2008;Kannana et al, 2006;Liu et al, 2015;Pagacz et al, 2018;Spoljaric & Shanks, 2012;Szolyga et al, 2018;Zaharescu et al, 2018), hydrogel formation (Mather et al, 2006;Wu et al, 2010), drug releasing stent coating (Guo et al, 2009;Huitron-Rattinger et al, 2013) and thin film applications (Blattmann & Mulhaupt, 2016;Madbouly & Otaigbe, 2009;Oaten & Choudhury, 2005) as it was incorporated with polyurethane networks.…”

Section: Composites Extrusion Hybrid Compositesmentioning

confidence: 99%

“…In previous studies, POSS was used effectively as a chain extender for the replacement of partial diol monomer at the polymerization stage of polyurethane (Liu & Zheng, 2005; Zhang et al , 2006, Zhang et al , 2011; Lopes et al , 2012; Markovic et al , 2013; Mahapatra et al , 2012; Lewicki et al , 2014; Zhao et al , 2019). Moreover, POSS promotes flame retardancy (Bourbigot et al , 2009; Kim et al , 2014; Michalowski & Pielichowski, 2018; Kavuncuoglu et al , 2019;), self-healing (Diao et al , 2015; Behera et al , 2018), scratch protection (Lai et al , 2009; Ghermezcheshme et al , 2015; Hebda & Pielichowski, 2018), thermal shielding (Kannana et al , 2006; Janowski & Pielichowski, 2008; Spoljaric & Shanks, 2012; Carmo et al , 2014; Liu et al , 2015; Pagacz et al , 2018; Szolyga et al , 2018; Zaharescu et al , 2018), hydrogel formation (Mather et al , 2006; Wu et al , 2010), drug-releasing stent coatings (Guo et al , 2009; Huitron-Rattinger et al , 2013) and thin-film applications (Oaten & Choudhury, 2005; Madbouly & Otaigbe, 2009; Blattmann & Mulhaupt, 2016) as it was incorporated in polyurethane networks. Recent advancements in HNT-polyurethane systems have also been postulated in several studies and reviews in which the polyurethane matrix was given specific properties including: shape memory (Bouaziz et al , 2019), corrosion resistance in protective coatings (Zahidah et al , 2017; Zeng et al , 2019), drug delivery (Hanif et al , 2016; Fizir et al , 2018), removal of pollutants from water (Anastopoulos et al , 2018; Papoulis, 2019) and thermal stability + fire-proofing (Tang et al , 2008; Smith et al , 2018).…”

mentioning

confidence: 99%

Hybrid nanocomposites of elastomeric polyurethane containing halloysite nanotubes and POSS nanoparticles: tensile, hardness, damping and abrasion performance

Mohamed

Tirkeş

Akar³

et al. 2020

Clay miner.

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Thermoplastic polyurethane (TPU) matrix was reinforced with polyhedral oligomeric silsesquioxane (POSS) and halloysite nanotubes (HNT), both separately and combined. Composite samples were fabricated using a melt-compounding method. Characterization of the composites obtained was performed via tensile and hardness tests, melt-flow index measurements (MFI), abrasion tests, dynamic mechanical analysis (DMA) and scanning electron microscopy (SEM) to investigate the mechanical performance, flow behaviour, tribological characteristics, thermo-mechanical response and morphological properties. The greatest tensile strength value was obtained for the smallest HNT content. Further addition of HNT resulted in agglomerations for both POSS and HNT particles. The shore hardness of TPU was enhanced by filler inclusions. The TPU/POSS composites displayed significant improvement in terms of abrasion resistance compared to TPU at lower loading levels. The DMA study showed that composites containing 0.5% POSS and 1.0% HNT displayed the greatest storage modulus. The glass-transition temperature of TPU shifted to smaller values with the addition of both nanoparticles. The HNT inclusions increased the MFI value of TPU because of their large aspect ratio. Homogeneous mixing of nanoparticles in the TPU matrix was confirmed by a SEM study of the composites. Their dispersion decreased as the concentrations of POSS and HNT increased. An adjuvant effect of POSS with HNT was achieved in their hybrid composites.

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“…The same approach, using IPDI‐HEA, was applied to prepare hyperbranched polyurethane acrylate LDH nanocomposite, with IPDI as a coupling agent cointercalated with dodecylsulfate anions into LDH . Exfoliated structures were observed by XRD and TEM, for the cured systems and after in situ polymerization . Using different methodologies (ultrasound, ultraturrax, sonicator) to disperse Mg 3 Al LDH, the authors reported a possible diffusion of isocyanate monomer replacing some carbonate anions.…”

Section: Hybrid Ldh Nanocompositesmentioning

confidence: 99%

Tailoring Hybrid Layered Double Hydroxides for the Development of Innovative Applications

Taviot-Guého

Prévot

Forano

et al. 2017

Adv Funct Materials

229

142

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International audienceHybrid materials based on layered double hydroxides (LDHs) exhibit great potential in diverse fields such as health care, polymer composites, environment, catalysis, and energy generation. Indeed, the compositional flexibility and the scalability of LDH structures, their low cost, and their ease of synthesis have made hybrid LDHs extremely attractive for constructing smart and high-performance multifunctional materials. This review provides a comprehensive and critical overview of the current research on multifunctional hybrid LDHs. Organic–inorganic hybrid LDHs, intercalated and surface-immobilized structures, are both specifically addressed. The new trends and strategies for hybrid LDH synthesis are first described, and then the potential of the latest hybrid LDHs, polymer LDH nanocomposites, and LDH bio-nanocomposites are presented. Significant achievements published from ≈2010, including authors' results, which employ hybrid LDH assemblies in materials science, medicine, polymer nanocomposites, cement chemistry, and environmental technologies, are specifically addressed. It is concluded with remarks on present challenges and future prospects

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Effect of the dispersive method in the preparation of the polyurethane/hydrotalcite nanocomposites by in situ polymerization

Cited by 18 publications

References 27 publications

Influence of Homogenization Technique and Blend Ratio on Chitosan/Alginate Polyelectrolyte Complex Properties

Influence of Homogenization Technique and Blend Ratio on Chitosan/Alginate Polyelectrolyte Complex Properties

Hybrid nanocomposites of elastomeric polyurethane containing halloysite nanotubes and POSS nanoparticles: tensile, hardness, damping and abrasion performance

Tailoring Hybrid Layered Double Hydroxides for the Development of Innovative Applications

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