A comparison of the structure, thermal properties, and biodegradability of polycaprolactone/chitosan and acrylic acid grafted polycaprolactone/chitosan

Wu, Chin‐San

doi:10.1016/j.polymer.2004.11.013

Cited by 154 publications

(77 citation statements)

References 33 publications

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“…In addition to the characteristic peaks 23,24 at 3300-3700, 1725, 852-1480, and 720 cm À1 observed in both polymers, there exists an obvious extra peak at 1710 cm À1 for the modified PCL. This extra peak, characteristic of AC¼ ¼O, and the broad AOH stretching absorbance at 3200-3700 cm À1 indicates the presence of free acid in the modified polymer.…”

Section: Resultsmentioning

confidence: 87%

Preparation and characterization of a polycaprolactone/C₆₀ composite and its improved counterpart (PCLNH₂/C₆₀OH)

2009

J of Applied Polymer Sci

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In this study, polycaprolactone/C 60 (PCL/ C 60 ) hybrids were prepared via a melt-blending method. To enhance the compatibility between PCL and C 60 , the acrylic acid-grafted polycaprolactone (PCL-g-AA) was first transformed to PCLANH 2 by mixing with 1,6-diaminohexane, while C 60 was oxidized using a mixture of H 2 SO 4 / HNO 3 and NaOH to derive C 60 fullerol (C 60 AOH). Thereafter, C 60 AOH and PCLANH 2 were used to replace PCL and C 60 , respectively. The resulting products were characterized using FTIR, solid-state 13 C-and 1 H-NMR, TGA, DMA, SEM, TEM, and Instron mechanical testing. Because of the formation of ANHCO groups through the reaction between amino groups of PCLANH 2 and hydroxyl groups of C 60 AOH, thermal and mechanical properties of the PCLANH 2 /C 60 AOH composite were significantly superior to those of PCL/C 60 . The optimal blend was the 5 wt % C 60 AOH with PCLANH 2 , producing an 84 C increase in initial decomposition temperature (IDT). C 60 AOH in excess of 5 wt % aggregated and caused separation of the organic and inorganic phases, lowering their compatibility.

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Section: Resultsmentioning

confidence: 87%

Preparation and characterization of a polycaprolactone/C₆₀ composite and its improved counterpart (PCLNH₂/C₆₀OH)

2009

J of Applied Polymer Sci

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“…u ) El estudio espectroscópico muestra que no hay evidencias de reacción química entre los componentes que constituyen la membrana, no se observa ningún desplazamiento de la frecuencia en las bandas de los grupos funcionales característicos respecto a los correspondientes componentes puros, no hay una interacción mutua con formación de enlaces covalentes entre las cadenas de CS y PCL. Las interacciones posibles entre los componentes poliméricos incluyen enlaces de hidrógeno intermoleculares entre el áto-mo de oxígeno del grupo carbonilo de la PCL y el hidrógeno del grupo hidroxilo o ion amonio del CS, lo que resulta deseable en un andamio biodegradable para la liberación controlada de TC [35], porque estos materiales tienen la capacidad de ser compatibles con el tejido y de degradarse cierto tiempo después de ser implantados dando lugar a productos que no son tóxicos y pueden ser eliminados por el organismo o metabolizados por éste.…”

Section: Pre-libunclassified

Preparación y caracterización de membranas poliméricas electrohiladas de policaprolactona y quitosano para la liberación controlada de clorhidrato de tiamina / Preparation and Characterization of Electrospun Polymeric Membranes of Polycaprolactone and Chitosan for Controlled Release of Thiamine Chlorhydrate

Cepeda

2016

Cienc. En Desarro.

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ResumenActualmente existen importantes investigaciones sobre la preparación de membranas porosas bioabsorbibles que permiten la liberación controlada de fármacos y vitaminas. En este estudio se propuso preparar membranas porosas a partir de policaprolactona (PCL) y quitosano (CS) bajo la técnica de electrohilado aplicando diferentes parámetros con el fin de evaluar sus características internas y propiedades para una potencial aplicación como liberador del clorhidrato de tiamina (Vitamina B 1 ). Además se desarrolló el estudio de la cinética de liberación In vitro del clorhidrato de tiamina (TC) con las membranas preparadas. Se obtuvo una membrana polimérica a partir de una disolución de

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“…This complex biological environment allows for a high microbial diversity, and therefore, an increase in the degradation potential for polymeric compounds (Itävaara et al 2002;Shogren et al 2003;Wu 2005;Martucci and Ruseckaite 2009). In the near future, discarded biocomposite byproducts will become biocomposite wastes, and these products will break down naturally by the air, moisture, climate, and soil, and disintegrate into the surrounding land.…”

Section: Introductionmentioning

confidence: 99%

Soil Burial of Polylactic Acid/Paddy Straw Powder Biocomposite

Yaacob¹,

Ismail²,

Ting³

2015

BioResources

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The objective of this work was to study the biodegradability of polylactic acid (PLA)/paddy straw powder (PSP) biocomposites. Environmental degradation was evaluated by composting the biocomposite samples into the soil. Different techniques, including mechanical tests and scanning electron microscopy (SEM), were used to obtain a view of the degradation that occurred during the soil burial of the biocomposites. Results of the mechanical tests showed that an increasing content of PSP in the biocomposites decreased the tensile strength and elongation at break (EB), while it increased the modulus of elasticity after six months of exposure. Scanning electron microscopy on the surface after soil burial showed that the filler was poorly wetted by the matrix. This explains the reduction in tensile strength and the elongation at break after soil burial. Differential scanning calorimetry results indicated that the crystallinity of the biocomposites increased with longer composting periods.

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A comparison of the structure, thermal properties, and biodegradability of polycaprolactone/chitosan and acrylic acid grafted polycaprolactone/chitosan

Cited by 154 publications

References 33 publications

Preparation and characterization of a polycaprolactone/C₆₀ composite and its improved counterpart (PCLNH₂/C₆₀OH)

Preparation and characterization of a polycaprolactone/C₆₀ composite and its improved counterpart (PCLNH₂/C₆₀OH)

Soil Burial of Polylactic Acid/Paddy Straw Powder Biocomposite

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A comparison of the structure, thermal properties, and biodegradability of polycaprolactone/chitosan and acrylic acid grafted polycaprolactone/chitosan

Cited by 154 publications

References 33 publications

Preparation and characterization of a polycaprolactone/C60 composite and its improved counterpart (PCLNH2/C60OH)

Preparation and characterization of a polycaprolactone/C60 composite and its improved counterpart (PCLNH2/C60OH)

Soil Burial of Polylactic Acid/Paddy Straw Powder Biocomposite

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Preparation and characterization of a polycaprolactone/C₆₀ composite and its improved counterpart (PCLNH₂/C₆₀OH)

Preparation and characterization of a polycaprolactone/C₆₀ composite and its improved counterpart (PCLNH₂/C₆₀OH)