The characterization of novel biodegradable blends based on polyhydroxybutyrate: The role of water transport

Pankova, Yu. N.; Щеголихин, А. Н.; Иорданский, А. Л.; Zhulkina, Anna; Olkhov, A. A.; Заиков, Г. Е.

doi:10.1016/j.molliq.2010.04.018

Cited by 43 publications

(29 citation statements)

References 14 publications

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“…However, application of this polymer is limited due to its high production cost and some properties, such as: high brittleness. Therefore, blending of PHB with suitable polymers may offer the opportunity to obtain cheaper products with improved mechanical properties [15][16][17][18][19][20][21] . Besides, blending conventional polyolefins with PHB has been considered an alternative to minimize the disposal problem in landfills and improve the instrinsic britlleness that restricts PHB applications 2,19,22 .…”

Section: Introductionmentioning

confidence: 99%

“…However, it is worthy to mention that for some researchers, the total assimilation of the fragmentary products by the ecosystem is required if the polymers are to be acceptable from the ecological point of view 13,27 . Several studies concerning the properties of LDPE/PHB blends have been performed and described in the literature 2,4,5,[15][16][17][18][28][29][30][31][32][33][34][35][36] . There is evidence that LDPE/PHB blends are immiscible and form morphological structures with well distinguished phase boundaries between dispersed phase and matrix 2,4,5,[15][16][17][18][28][29][30][31][32][33][34][35][36] .…”

Section: Introductionmentioning

confidence: 99%

“…At the amount of PHB above 16%, the blend system undergoes the morphology transfer from the oriented PHB structure to the isotropic one where the PHB fibrils transform into a network. The distinction between two morphologies reflects the different values of water permeability through the blend films 18 . There are few papers published concerning the biodegradation properties of the LDPE/PHB blends.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical and morphological properties of LDPE/ PHB blends filled with castor oil pressed cake

Burlein

Rocha

2013

Mat. Res.

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Blends of PHB and LDPE were prepared by melt mixing in a twin screw extruder. Castor oil cake (CC) was used as filler for the blends. The design of experiments (DOE) technique was used to evaluate the effect of the components proportion on the materials properties. The mechanical properties and morphology of the materials were evaluated. The LDPE Young's modulus increases but the other tensile properties and impact resistance deteriorate with the addition of PHB or CC. The tensile strength values of binary mixtures of LDPE lie in the range from 8.9 to 10 MPa. As some commercial grades of LDPE have mechanical strength in this range, it may be inferred that the addition of a certain amount of PHB or CC to LDPE may be considered as a possibility for obtaining LDPE based materials with increased susceptibility to biodegradation. The poor interfacial adhesion between the phases became visible in all samples.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mechanical and morphological properties of LDPE/ PHB blends filled with castor oil pressed cake

Burlein

Rocha

2013

Mat. Res.

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“…However, it is worthy to mention that for some researchers, the total assimilation of the fragmentary products by the ecosystem is required if the polymers are to be acceptable from the ecological point of view 9,20 . Several studies concerning the properties of LDPE/PHB blends have been performed and described in the literature 12,[21][22][23][24][25][26][27][28][29][30][31][32][33][34][35] . There is evidence that LDPE/PHB blends are immiscible and form morphological structures with well distinguished phase boundaries between dispersed phase and matrix 12,[21][22][23][24][25][26]32 .…”

Section: Introductionmentioning

confidence: 99%

LDPE/PHB blends filled with castor oil pressed cake

Burlein

Rocha

2013

Mat. Res.

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Blends of PHB and LDPE were prepared by melt mixing in a twin screw extruder. Castor oil pressed cake (CC) was used as filler for the blends. The mixture design technique was used to evaluate the effect of the components proportion on the materials flexural properties. The results show that superior LDPE flexural properties may be obtained by the addition of PHB or castor oil cake to LDPE. Biodegradation was evaluated burying the samples in simulated soil for different periods of time. The ternary mixtures with higher content of PHB showed more pronounced degradation. Under the experimental conditions studied the LDPE/CC compositions presented no degradation. However, the loss of mass of the LDPE/PHB/CC ternary mixtures was higher than the loss of mass of the corresponding LDPE/PHB binary mixture. This result suggests that the castor oil cake accelerates the degradation of the LDPE/PHB mixtures.

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“…In general, for hydrophobic polymers such as EMA, the drug diffusion is affected mainly by the diffusion coefficient across the polymer, water uptake kinetics and the presence of filler and additives. 17,[28][29][30] In these cases, the drug released is governed only by the diffusion coefficient because EMA is a nonwater-swellable polymer and the low DZ solubility in the polymeric matrix may explain the low content of DZ released. The n values of EMA/PCL-T/DZ 60/20/20 and 50/30/20 (Table 2) were obtained by applying the Power Law 0,7.…”

Section: Drug Release From Ema/pcl-t Filmsmentioning

confidence: 99%

Poly(ethylene-co-methyl acrylate)/poly(caprolactone) triol blends for drug delivery systems: characterization and drug release

Κanis¹,

Soldi²

2012

Quím. Nova

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Recebido em 16/2/11; aceito em 5/7/11; publicado na web em 19/8/11Poly(ethylene-co-methyl acrylate) (EMA) and poly (caprolactone) triol (PCL-T) blends, a biodegradable aliphatic polyester with low molecular weight and moderate water solubility containing diltiazem hydrochloride (DZ) were studied in terms of the thermal and morphological properties, and drug release mechanism. An increase in the PCL-T content in the EMA/PCL-T/DZ films decreased the degree of DZ crystallinity. Drug release from these films is temperature-dependent, and it is possible to modify the drug release rate by adjusting the EMA/PCL-T composition of the blends. The mechanism of drug release is governed by PCL-T melting and PCL-T leaching from EMA matrix.

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The characterization of novel biodegradable blends based on polyhydroxybutyrate: The role of water transport

Cited by 43 publications

References 14 publications

Mechanical and morphological properties of LDPE/ PHB blends filled with castor oil pressed cake

Mechanical and morphological properties of LDPE/ PHB blends filled with castor oil pressed cake

LDPE/PHB blends filled with castor oil pressed cake

Poly(ethylene-co-methyl acrylate)/poly(caprolactone) triol blends for drug delivery systems: characterization and drug release

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