Water transport properties in poly(3-hydroxybutyrate) and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) biopolymers

Miguel, Óscar; Iruin, J. J.

doi:10.1002/(sici)1097-4628(19990725)73:4<455::aid-app1>3.0.co;2-y

Cited by 44 publications

(32 citation statements)

References 35 publications

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“…The value of the diffusion coefficient showed considerable concentration dependence, but depended also on the average molar mass of the polymer and on the thickness of the film. The reported values of 1.7·10 -7 cm 2 /s -2.6·10 -6 cm 2 /s [28], are much larger than those obtained for water [26,27,[29][30][31]35]. SanchezGarcia investigated the diffusion of a model drug (limonene) in PHB nanocomposites [36], but determined the diffusion coefficient also in a polymer not containing any reinforcement.…”

Section: Considerations Discussionmentioning

confidence: 99%

“…If we consider this application, the kinetics of drug release must be determined, but quantitative description requires the knowledge of the diffusion coefficient. This characteristic might be measured and/or calculated by a number of approaches already published in the literature [24][25][26][27][28][29][30][31][32][33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

“…The simplest way to determine the unknown diffusion coefficient of a liquid substance is to immerse the polymer into it and measure weight as a function of time [24][25][26][27][28][29][30][31]. The rate of the sorption is related to the diffusion coefficient.…”

Section: Introductionmentioning

confidence: 99%

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A novel method for the determination of diffusion coefficients in amorphous poly(3-hydroxybutyrate)

et al. 2017

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Section: Considerations Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A novel method for the determination of diffusion coefficients in amorphous poly(3-hydroxybutyrate)

et al. 2017

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“…Potentially positive properties of PHB and PHBV films with respect to food packaging applications are water vapor permeability (similar to that of PVC or PET [115][116][117][118][119] ), non-swelling behavior, and lower hydrophilicity (compared to other biopolymers e.g., cellulose, starch, chitosan and gluten) 115 . Besides, solubility and diffusivity of water in PHAs is a key factor for their degradation via enzymatic or non-enzymatic hydrolysis [120][121][122] .…”

Section: Permeabilitymentioning

confidence: 99%

Application of Poly(hydroxyalkanoate) In Food Packaging: Improvements by Nanotechnology

Khosravi‐Darani¹

2015

Chem.Biochem.Eng.Q.

128

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The environmental impact of plastic usage is of critical concern and too great to repair. A shift toward biodegradable food packaging is one option. The aim of this review paper is the study of the potential of biodegradable materials for food packaging. The main characteristics in relation to food usage can be narrowed down to mass transfer (gas and water vapor), thermal and mechanical properties. Among several kinds of biodegradable polymers, poly(hydroxyalkanoate) is one of the favorable candidates for food packaging due to its physical and mechanical properties, biodegradability, with low permeability for O 2 , H 2 O and CO 2 without residues of catalysts and water solubility. The main focus of this article is to address poly(hydroxyalkanoate) as a potential candidate for food packaging. The need of applying biobased polymers in food packaging is presented in the introduction of this study. We also describe the most common biopolymers providing a brief overview of classification and application. This is followed by an outline of biopolymer production and a main section in which the properties of poly(hydroxybutyrate)-based nanocomposites of greatest relevance to food packaging are discussed. Furthermore, several approaches for improvement of poly(hydroxybutyrate) properties are described and the role of nanotechnology to improve its mechanical properties is presented. Finally, the article concludes with a summary as well as some possible future trends.

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“…However, the use of N-doped CNTs for obtaining shortened nanotubes has not been reported thus far. Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) is a naturally derived biodegradable polyester that has better processing and mechanical properties than poly(3-hydroxybutyrate) in terms of its lower melting temperature and low brittleness due to the presence of the 3-hydroxyvalerate (3 HV) units in the former [21,22]. PHBV is an excellent environmentally friendly replacement for petroleum-derived plastics [21,22].…”

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confidence: 99%

Biocomposite membranes based on poly(3-hydroxybutyrate-co-3-hydroxyvalerate) and multiwall carbon nanotubes for gas separation

Huh¹,

Lee²,

Park³

et al. 2017

Carbon letters

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The development of gas separation membranes is currently an active research area because of the rapidly increasing interest in carbon dioxide capture and hydrogen recovery, which are two of the most important solutions for problems related to energy and the environment [1][2][3][4]. Polymer membranes show selectivity in the separation of gases due to differences in the permeability of individual gases through the polymer film [3,4]. Even though advantageous in terms of low cost, the segmental flexibility of polymers has limited the discriminating ability of polymer membranes. As the permeability increases, this typically leads to a more open structure, and the selectivity decreases. It has been shown that the trade-off between permeability and selectivity has an evident "upper-bound" [5]. The existence of this upper limit can explain the fact that the performances of polymeric membranes do not yet meet the requirements of current membrane technology. A new class of membranes based on polymer composites, namely, mixed matrix membranes (MMMs), has been proposed as an alternative approach to overcome the inherent drawbacks of polymeric membranes [6][7][8].MMMs are comprised of inorganic particles embedded in a polymer matrix and benefit from the unique properties of these inorganic fillers while exploiting the low cost of processing polymers. Carbon nanotubes (CNTs) have been explored in MMM applications due to their unique capability to enhance the mechanical strength of composites even for a small amount of filler content, their potentially good control of pore dimensions at the nanometer scale, and their cavities with frictionless inner surfaces [9][10][11][12][13][14]. Generally, as-synthesized CNTs are not open ended, and one of the problems of using CNTs for MMM applications is that they must be cut either during the purification processes or in an additional processing step to shorten them [6]. Effective use of CNTs in MMMs also depends on whether the CNTs can be uniformly dispersed in the polymer matrices. The poor dispersion of CNTs largely arises from the smooth and chemically inert surface of the CNTs which is incompatible with most solvents and polymers. One of the most effective methods to overcome the dispersion problem of CNTs is to chemically functionalize the surface of CNTs to improve the interfacial attraction between CNTs and a polymer. In this study, first, nitrogen-doped multiwall carbon nanotubes (MWCNTs) were synthesized with a chemical vapor deposition (CVD) process using flowing CH 4 and NH 3 gases to create defects on the CNT surfaces. The N-doped MWCNTs were subsequently cut to shorter nanotubes during the functionalization of the CNTs by acid treatment. The short f-MWCNTs could be beneficial for gas transportation through the inner cavities of the tubes because of CNTs with an increased number of open ends and a more uniform dispersion due to their decreased length. Nitrogen doping has been proven to be an effective method to tailor the electrical properties as well as the chemical reac...

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Water transport properties in poly(3-hydroxybutyrate) and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) biopolymers

Cited by 44 publications

References 35 publications

A novel method for the determination of diffusion coefficients in amorphous poly(3-hydroxybutyrate)

A novel method for the determination of diffusion coefficients in amorphous poly(3-hydroxybutyrate)

Application of Poly(hydroxyalkanoate) In Food Packaging: Improvements by Nanotechnology

Biocomposite membranes based on poly(3-hydroxybutyrate-co-3-hydroxyvalerate) and multiwall carbon nanotubes for gas separation

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