Transcrystallization of poly(l-lactic acid) on the surface of reduced graphene oxide fibers

RSC Advances ◽  
2016 ◽  
Vol 6 (102) ◽  
pp. 100090-100097 ◽  
Author(s):  
Mengfan Jing ◽  
Hong Jiang ◽  
Yilan Guo ◽  
Zhiqiang Wu ◽  
Qiang Fu
Keyword(s):  
Growth Rate ◽  
Graphene Oxide ◽  
Lactic Acid ◽  
Crystal Growth ◽  
Reduced Graphene Oxide ◽  
Heterogeneous Nucleation ◽  
Crystal Growth Rate ◽  
Reduced Graphene ◽  
Transcrystalline Layer

Transcrystalline layer could form between rGOF and PLLA. The good nucleating ability of rGOF could be quantitatively characterized based on the theories of heterogeneous nucleation and crystal growth rate.

scholarly journals Regularization of the Ostwald supersaturation model for Liesegang bands

2019 ◽  
Vol 475 (2228) ◽  
pp. 20190154 ◽  
Author(s):  
J. M. Duley ◽  
A. C. Fowler ◽  
I. R. Moyles ◽  
S. B. G. O'Brien
Keyword(s):  
Growth Rate ◽  
Crystal Growth ◽  
Numerical Method ◽  
Heterogeneous Nucleation ◽  
Relaxation Mechanism ◽  
Crystal Growth Rate ◽  
Liesegang Rings ◽  
Liesegang Bands ◽  
Ill Posed

In a previous paper, we analysed the Keller–Rubinow formulation of Ostwald's supersaturation theory for the formation of Liesegang rings or Liesegang bands, and found that the model is ill-posed, in the sense that after the termination of the first crystal front growth, secondary bands form, as in the experiment, but these are numerically found to be a single grid space wide, and thus an artefact of the numerical method. This ill-posedness is due to the discontinuity in the crystal growth rate, which itself reflects the supersaturation threshold inherent in the theory. Here we show that the ill-posedness can be resolved by the inclusion of a relaxation mechanism describing an impurity coverage fraction, which physically enables the transition in heterogeneous nucleation from precipitate-free impurity to precipitate-covered impurity.

Organometal-catalyzed synthesis of high molecular weight poly-(l-lactic acid) with a covalently attached imidazolium salt: performance-enhanced reduced graphene oxide–PLLA biomaterials

2019 ◽  
Vol 43 (41) ◽  
pp. 16367-16373 ◽  
Author(s):  
Yuri Clemente Andrade Sokolovicz ◽  
Clarissa Martins Leal Schrekker ◽  
Frédéric Hild ◽  
Leonardo de Oliveira Bodo ◽  
Júlia Lacerda Couto ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Graphene Oxide ◽  
Lactic Acid ◽  
High Molecular Weight ◽  
Reduced Graphene Oxide ◽  
Imidazolium Salt ◽  
Reduced Graphene ◽  
High Molecular Weight Poly

Herein, we report on the synthesis of imidazolium salt end-functionalized PLLA (PLLA-IS) and its application in the preparation of reduced graphene oxide–PLLA composites.

scholarly journals Effects of Graphene Nanoplatelets and Reduced Graphene Oxide on Poly(lactic acid) and Plasticized Poly(lactic acid): A Comparative Study

Polymers ◽  
2014 ◽  
Vol 6 (8) ◽  
pp. 2232-2246 ◽  
Author(s):  
Buong Chieng ◽  
Nor Ibrahim ◽  
Wan Yunus ◽  
Mohd Hussein ◽  
Yoon Then ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Lactic Acid ◽  
Comparative Study ◽  
Reduced Graphene Oxide ◽  
Graphene Nanoplatelets ◽  
Poly Lactic Acid ◽  
Reduced Graphene

scholarly journals Amperometric L-Lactate Biosensor Based upon a Gold Nanoparticles/Reduced Graphene Oxide/Polyallylamine Hydrochloride Modified Screen-Printed Graphite Electrode

Chemosensors ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 74
Author(s):  
Oana-Maria Istrate ◽  
Lucian Rotariu ◽  
Camelia Bala
Keyword(s):  
Gold Nanoparticles ◽  
Graphene Oxide ◽  
Lactic Acid ◽  
Reduced Graphene Oxide ◽  
Long Term Stability ◽  
Reduced Graphene ◽  
Electrochemically Reduced Graphene Oxide ◽  
Dehydrogenase Enzyme ◽  
Polyallylamine Hydrochloride ◽  
Screen Printed

This work describes a novel L-lactate biosensor based on the immobilization of L-lactate dehydrogenase enzyme on the screen-printed electrode modified with a ternary composite based on gold nanoparticles, electrochemically-reduced graphene oxide, and poly (allylamine hydrochloride). The enzyme was stabilized by crosslinking with glutaraldehyde. Applied working potential, pH and NAD+ concentration were optimized. The biosensor reports a specific sensitivity of 1.08 µA/mM·cm2 in a range up to 3 mM L-lactic acid with a detection limit of 1 µM. The operational and long-term stability as well as good selectivity allowed the L-lactic acid measurement in dairy products and wine samples.

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