Effects of the organic modification of different clay minerals and their application in biodegradable polymer nanocomposites of PHBV

Daitx, Tales S.; Carli, Larissa N.; Crespo, Janaína da Silva; Mauler, Raquel Santos

doi:10.1016/j.clay.2015.07.038

Cited by 46 publications

(14 citation statements)

References 42 publications

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“…Therefore, functionalizing HNTs is extremely important for processing and enhancing the properties of HNTs and polymer nanocomposites, to improve mechanical and thermal properties, because the functionalization improves the dispersion and stressstrain transfer [22]. Several studies reported that the functionalization enhances the biocompatibility of several nanomaterials [16,28,[33][34][35], enhancing the chemical affinity of HNT with the polymer through hydrogen bonding between the amine groups and the polymer carboxylic moieties [4]. In recent years, the functionalization of HNTs has attracted considerable interests in order to improve their properties and performance of the related products and to adsorb drugs (forming complexes) by various methods [ (Fig.…”

Section: [Tabela I -Principais Características Físicas E Químicas Dosmentioning

confidence: 99%

“…Compared to conventional composite materials, these hybrid materials can improve the mechanical, thermal and barrier properties of polymers with low filler [28].…”

Section: Hnts-polymeric Nanocompositesmentioning

confidence: 99%

“…Additionally, inorganic nanoparticles typically do not interact well with organic polymers, resulting in poor dispersion and adhesion. Thereby, the organic modification of nanoparticles can promote both higher compatibility between organic and inorganic phases and improved interfacial interactions between a polymer and filler [28,32].…”

Section: Hnts-polymeric Nanocompositesmentioning

confidence: 99%

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Halloysite nanotubes-polymeric nanocomposites: characteristics, modifications and controlled drug delivery approaches

2017

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Halloysite nanotubes (HNTs) are aluminosilicate nanoclay mineral which have a hollow tubular structure and occurs naturally. They are biocompatible and viable carrier for inclusion of biologically active molecules due to the empty space inside the tubular structure. In this article, the HNTs main characteristics, and the HNTs-polymeric nanocomposite formation and their potential application as improvement of the mechanical performance of polymers and entrapment of hydrophilic and lipophilic substances are summarized. Recent works covering the increment of HNTs-polymeric nanocomposites and presenting promising employment of these systems as nanosized carrier, being suitable for pharmaceutical and biomedical applications, based on earlier evidence in literature of its nature to sustain the release of loaded drugs, presenting low cytotoxicity, and providing evidence for controlled drug delivery are reviewed. Keywords: nanoclay, bio-nanocomposites, functionalization, sustained drug release, nanotechnology. Resumo Nanotubos de haloisita (NTH) são nanoargilas de silicato de alumínio com estrutura naturalmente tubular. Eles são biocompatíveis e apresentam viabilidade como carreador de moléculas biologicamente ativas devido ao seu espaço interno na estrutura tubular. Neste artigo as principais características dos NTH e a obtenção de nanocompósitos poliméricos com NTH, e suas potenciais aplicações para o aperfeiçoamento das propriedades mecânicas dos polímeros

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Section: [Tabela I -Principais Características Físicas E Químicas Dosmentioning

confidence: 99%

“…Compared to conventional composite materials, these hybrid materials can improve the mechanical, thermal and barrier properties of polymers with low filler [28].…”

Section: Hnts-polymeric Nanocompositesmentioning

confidence: 99%

Section: Hnts-polymeric Nanocompositesmentioning

confidence: 99%

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Halloysite nanotubes-polymeric nanocomposites: characteristics, modifications and controlled drug delivery approaches

2017

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“…HNT's body consists of two different interlayer surfaces, which are the internal surface containing aluminol (Al-OH) groups and the external surface covered by siloxane (Si-O-Si) groups. Further, some silanol (Si-OH) and aluminol groups exist at the edges of the tubes [17] [18] [19]. These hydroxyl groups caused polarity on the HNT surface offer an opportunity to obtain efficient dispersion of HNT into the polar polymeric matrices [20] [24].…”

Section: Introductionmentioning

confidence: 99%

Surface Modification of Nanoclays with Styrene-Maleic Anhydride Copolymers

Arat¹,

Uyanık²

2017

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This study presents the modification of surfaces of nanoclays, halloysite nanotubes (HNT) and sepiolite (SEP), with styrene-maleic anhydride copolymers (SMA) via esterification reaction between hydroxyl groups of the nanoclays and anhydride groups of SMA. The structural, thermal, and morphological analyses of the modified nanoclays were performed by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction analysis (XRD), thermal gravimetric analysis (TGA), and field emission scanning electron microscopy (FESEM). All of these results suggested that the expected modification of HNT and SEP surfaces were performed. Although XRD patterns of HNT containing samples showed that the basal spacing shifted to higher distances, it was found that those of the crystalline structure of SEP remained unchanged. Thermal gravimetric analysis exhibited that SMA copolymers were grafted onto the surfaces of nanoclays varying amounts between 15 and 43 wt. % depending on the types of nanoclays and SMA copolymers. This modification indicates that these nanoclays can be added to the polystyrene matrix without any compatibilizers.

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“…En el caso de los polímeros biodegradables, los nanocompuestos pueden mejorar el comportamiento en los aspectos donde los polímeros derivados del petróleo aún son superiores [129][130][131]. Ha sido ampliamente reportada la mejora de las propiedades mecánicas, la estabilidad térmica y las propiedades barrera a gases, aromas y vapor de agua de matrices de biopolímeros por la adición de pequeñas fracciones volumétricas de nanopartículas, tales como, nanotubos de carbono [132][133][134], bentonitas [20,135], nanotubos de haloisita [136][137][138][139], montmorillonitas [136,[139][140][141][142][143], agujas de sepiolita [144][145][146][147][148], vermiculita [149] y nanocelulosa [150][151][152][153], entre otros.…”

Section: Nanocompuestos Poliméricosunclassified

Desarrollo y caracterización de formulaciones poliméricas biodegradables y termoconformables para envasado

Ausejo¹

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Effects of the organic modification of different clay minerals and their application in biodegradable polymer nanocomposites of PHBV

Cited by 46 publications

References 42 publications

Halloysite nanotubes-polymeric nanocomposites: characteristics, modifications and controlled drug delivery approaches

Halloysite nanotubes-polymeric nanocomposites: characteristics, modifications and controlled drug delivery approaches

Surface Modification of Nanoclays with Styrene-Maleic Anhydride Copolymers

Desarrollo y caracterización de formulaciones poliméricas biodegradables y termoconformables para envasado

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