Poly(l-lactide)/nano-structured carbon composites: Conductivity, thermal properties, crystallization, and biodegradation

Novel poly(butylene succinate) nanocomposites containing strontium hydroxyapatite nanorods with enhanced osteoconductivity for tissue engineering applications

“…In our previous work using higher amounts of nanorods (5 and 20 wt%) and due to their low adhesion with the PBSu matrix, a 'gap' between PBSu and inorganic nanoparticles was formed and lipases could diffuse inside the polymer matrix forming a porous structure. The formation of such a gap and porous structure is known to accelerate the enzymatic degradation of biodegradable polyesters [30]. However, in the present study such a 'gap' was not found from SEM measurements and the higher rate of enzymatic hydrolysis of nanocomposites should be attributed to the higher hydrophylicity of the added nanorods.…”

“…All samples were washed with PBS, fixed with a solution containing 3 vol% glutaraldehyde (Sigma, Germany) and 3 vol % paraformaldehyde (Sigma, Germany) in 0.2 M sodium cacodylate buffer (pH 7.4) and finally rinsed three times with PBS. Consequently, all samples were dehydrated in a graded ethanol series (30,50,70,80,90,95, and 99.8 vol%). Samples were maintained in 99.8 vol% ethanol and critical-point dried (EM CPD300, Leica, Germany) before imaging with SEM.…”

Polylactide/nano and microscale silica composite films. I. Preparation and characterization

“…The nanosize particles provide more surface areas to hinder molecular mobility to enhance thermal stability. The thermal behavior was contrary to PLA/clay [28][29][30] and PLA/nanostructured carbon nanocomposites, 31 whose thermal stability become worse with the addition of large aspect ratio of fillers (i.e., needle-like structure) result in vacant space and ''chimney'', and volatile components formed by thermal degradation could have readily been removed via ''chimney,'' 32 resulting in a rapid increase in weight loss. Further study needs to be carried out to find out the differences of thermal stability between different PLA composites.…”

Improving the thermal and mechanical properties of poly(propylene carbonate) by incorporating functionalized graphite oxide

“…[5][6][7] Among these methods, the filling is commercially advantageous because the physical properties are readily manipulated by the type and concentration of fillers. 8 However, for conventional filler/PPC composites, the high loading level of fillers leads to the deterioration of some properties. Therefore, it is still a challenging work to obtain PPC composites with superior properties with a quite low filler addition.…”

“…Upon oxidation and modification, a weak diffraction peak of GO is observed at about 2y ¼ 12.1 , (001) corresponding to the interlayer spacing of 0.858 nm (curve b), while that of the GO-TDI-BD platelets shifts to low 2y ¼ 8. 8 and thus the interlayer spacing is increased to 1.3 nm due to the presence of the TDI and BD between the sheets of the GO (curve d). After organic modification, it was found that the organic modified MGO could not disperse well in water and finally precipitated.…”