Crystallization kinetics of poly(3-hydroxybutyrate-co-3-hydroxyvalerate)/cellulose nanowhiskers composites

Ten, Elena; Jiang, Long; Wolcott, Michael P.

doi:10.1016/j.carbpol.2012.05.076

Cited by 93 publications

(68 citation statements)

References 35 publications

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“…The PHBV scaffold showed strong diffraction peaks at 2θ = 13.4 and 16.8°, which were corresponding to (020) and (110) planes, respectively; additional diffraction peaks at 2θ = 20.1, 21.4, 22.6, 25.5, and 27.1° were also detected, which were assigned to (021), (101), (111), (121), and (040) planes, respectively [33,34] . After incorporating nMgO, the scaffolds showed two new diffraction peaks at 2θ = 42.9 and 62.3°, which were just corresponding to the two main diffraction peaks of MgO assigning to (200) and (220) planes (JCPDS 87-0653), respectively.…”

Section: Resultsmentioning

confidence: 98%

An nMgO containing scaffold: Antibacterial activity, degradation properties and cell responses

Shuai

Guo

Gao

et al. 2024

IJB

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Bone repair failure caused by implant-related infections is a common and troublesome problem. In this study, an antibacterial scaffold was developed via selective laser sintering with incorporating nano magnesium oxide (nMgO) to poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV). The results indicated the scaffold exerted high antibacterial activity. The antibacterial mechanism was that nMgO could cause oxidative damage and mechanical damage to bacteria through the production of reactive oxygen species (ROS) and direct contact action, respectively, which resulted in the damage of their structures and functions. Besides, nMgO significantly increased the compressive properties of the scaffold including strength and modulus, due to its excellent mechanical properties and uniform dispersion in the PHBV matrix. Moreover, the degradation tests indicated nMgO neutralized the acid degradation products of PHBV and benefited the degradation of the scaffold. The cell culture demonstrated that nMgO promoted the cellular adhesion and proliferation, as well as osteogenic differentiation. The present work may open the door to exploring nMgO as a promising antibacterial material for tissue engineering. Keywords: Nano magnesium oxide; antibacterial scaffolds; degradation properties; cytocompatibility; mechanical properties

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Section: Resultsmentioning

confidence: 98%

An nMgO containing scaffold: Antibacterial activity, degradation properties and cell responses

Shuai

Guo

Gao

et al. 2024

IJB

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“…1) corresponds to neat PHBV, 2)-6) corresponds to 1 wt%, 2 wt%, 3 wt%,4 wt%, and 5 wt% CNW/PHBV nanocomposites, respectively (reprinted with permission from Ten et al [65]. In these recent studies [65,68,69], the original proposal for epitaxial growth of Dufresne et al [46] appears to be corroborated. As a result, an increase or a decrease of crystallization rate could be observed, depending on loading and crystallization temperature.…”

Section: Polyhydroxyalkanoate/cellulose Nanocompositesmentioning

confidence: 88%

“…Recently Wolcott et al revisited the morphology of solvent cast PHA/ CNW nanocomposites using the copolymer poly(3-hydroxybutyrate-co-3hydroxyvalerate) (PHBV) [65][66][67][68]. Differential scanning calorimetry (DSC) heating scans revealed that freshly casted PHBV matrix and nanocomposites (1-5 wt% CNW) were fully crystallized, exhibiting only a double melting point ascribed to melting and recrystallization ( Fig.…”

Section: Polyhydroxyalkanoate/cellulose Nanocompositesmentioning

confidence: 99%

“…A subsequent study of the same system clearly identified the dual effect of CNWs for PHBV, as heterogeneous nucle- Figure 18.3 DSC thermograms of neat PHBV and CNW/PHBV nanocomposites from the second (a) and first (b) heating scans. Copyright 2010 Elsevier Ltd.) ating agents on the one hand and as confinement agents on the other hand [68]. Copyright 2010 Elsevier Ltd.) ating agents on the one hand and as confinement agents on the other hand [68].…”

Section: Polyhydroxyalkanoate/cellulose Nanocompositesmentioning

confidence: 99%

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Morphological and Thermal Investigations of Cellulosic Bionanocomposites

Osorio‐Madrazo¹,

Laborie²

2013

Biopolymer Nanocomposites

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“…The incorporation of CNCs in a PHB matrix was proposed as a way to increase its elongation at break as well as its thermal properties 109 . Wolcott's research group has systematically studied the preparation and properties of poly(3hydroxybutyrate-co-3-hydroxyvalerate) (PHBV)/CNCs composites [129][130][131][132][133] . These studies showed that PHBV reinforced with homogeneously dispersed CNCs (1-5 wt.% ) could be prepared by solvent casting and exhibited significant improvements in tensile strength, Young's modulus, toughness and dynamic modulus.…”

Section: Natural-based Polymeric Systemsmentioning

confidence: 99%

The Potential of Cellulose Nanocrystals in Tissue Engineering Strategies

2014

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Cellulose nanocrystals (CNCs) are a renewable nanosized raw material that is drawing a tremendous level of attention from the materials community. These rod-shaped nanocrystals that can be produced from a variety of highly available and renewable cellulose-rich sources are endowed with exceptional physicochemical properties which have promoted their intensive exploration as building blocks for the design of a broad range of new materials in the past few decades. However, only recently have these nanosized substrates been considered for bioapplications following the knowledge on their low toxicity and ecotoxicological risk. This Review provides an overview on the recent developments on CNC-based functional biomaterials with potential for tissue engineering (TE) applications, focusing on nanocomposites obtained through different processing technologies usually employed in the fabrication of TE scaffolds into various formats, namely, dense films and membranes, hierarchical three-dimensional (3D) porous constructs (micro/nanofibers mats, foams and sponges), and hydrogels. Finally, while highlighting the major achievements and potential of the reviewed work on cellulose nanocrystals, alternative applications for some of the developed materials are provided, and topics for future research to extend the use of CNCs-based materials in the scope of the TE field are identified.

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Crystallization kinetics of poly(3-hydroxybutyrate-co-3-hydroxyvalerate)/cellulose nanowhiskers composites

Cited by 93 publications

References 35 publications

An nMgO containing scaffold: Antibacterial activity, degradation properties and cell responses

An nMgO containing scaffold: Antibacterial activity, degradation properties and cell responses

Morphological and Thermal Investigations of Cellulosic Bionanocomposites

The Potential of Cellulose Nanocrystals in Tissue Engineering Strategies

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