Investigation of optical properties, chemical network and electronic environments of polycaprolactone/reduced graphene oxide fiber nanocomposites

Ishwarchand, Wahengbam; Sarakar, Goutam; Swain, Bibhu P.

doi:10.1007/s00289-021-03920-6

Cited by 10 publications

(3 citation statements)

References 36 publications

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“…For the high-resolution O 1s spectra (Figure c), the observed O 1s binding energies were attributed to ester (CO), oxygen (O–O), ester carbonyl (RC O O), and oxygen adjacent to an ester carbonyl group (−CO O ). The peak intensity of O 1s is significantly reduced when the scaffolds were coated with PPy because the N-containing groups interact with some of the oxygen-containing functional groups. , In summary, the Raman spectra and XPS results confirmed that PPy was successfully deposited onto the surfaces of PLCL and PLGA fibers.…”

Section: Resultsmentioning

confidence: 64%

“…The peak intensity of O 1s is significantly reduced when the scaffolds were coated with PPy because the N-containing groups interact with some of the oxygen-containing functional groups. 62,63 In summary, the Raman spectra and XPS results confirmed that PPy was successfully deposited onto the surfaces of PLCL and PLGA fibers.…”

Section: Surface Characterization 341 Surface Chemicalmentioning

confidence: 55%

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Surface-Modified Polypyrrole-Coated PLCL and PLGA Nerve Guide Conduits Fabricated by 3D Printing and Electrospinning

et al. 2022

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The efficiency of nerve guide conduits (NGCs) in repairing peripheral nerve injury is not high enough yet to be a substitute for autografts and is still insufficient for clinical use. To improve this efficiency, 3D electrospun scaffolds (3D/E) of poly(l-lactide-co-ε-caprolactone) (PLCL) and poly(l-lactide-co-glycolide) (PLGA) were designed and fabricated by the combination of 3D printing and electrospinning techniques, resulting in an ideal porous architecture for NGCs. Polypyrrole (PPy) was deposited on PLCL and PLGA scaffolds to enhance biocompatibility for nerve recovery. The designed pore architecture of these “PLCL-3D/E” and “PLGA-3D/E” scaffolds exhibited a combination of nano- and microscale structures. The mean pore size of PLCL-3D/E and PLGA-3D/E scaffolds were 289 ± 79 and 287 ± 95 nm, respectively, which meets the required pore size for NGCs. Furthermore, the addition of PPy on the surfaces of both PLCL-3D/E (PLCL-3D/E/PPy) and PLGA-3D/E (PLGA-3D/E/PPy) led to an increase in their hydrophilicity, conductivity, and noncytotoxicity compared to noncoated PPy scaffolds. Both PLCL-3D/E/PPy and PLGA-3D/E/PPy showed conductivity maintained at 12.40 ± 0.12 and 10.50 ± 0.08 Scm–1 for up to 15 and 9 weeks, respectively, which are adequate for the electroconduction of neuron cells. Notably, the PLGA-3D/E/PPy scaffold showed superior cytocompatibility when compared with PLCL-3D/E/PPy, as evident via the viability assay, proliferation, and attachment of L929 and SC cells. Furthermore, analysis of cell health through membrane leakage and apoptotic indices showed that the 3D/E/PPy scaffolds displayed significant decreases in membrane leakage and reductions in necrotic tissue. Our finding suggests that these 3D/E/PPy scaffolds have a favorable design architecture and biocompatibility with potential for use in peripheral nerve regeneration applications.

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Section: Resultsmentioning

confidence: 64%

Section: Surface Characterization 341 Surface Chemicalmentioning

confidence: 55%

Surface-Modified Polypyrrole-Coated PLCL and PLGA Nerve Guide Conduits Fabricated by 3D Printing and Electrospinning

et al. 2022

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“…The d -spacing of 3.5 Å for rGO was calculated. A small diffraction peak appeared at 43° corresponding to the (102) reflection plane in the GO and rGO structure . Also, the thickness of the rGO nanosheet was calculated using Debye–Scherrer’s formula as mention in eq …”

Section: Resultsmentioning

confidence: 99%

Reduced Graphene Oxide Nanosheets Enhance the Sensitivity of p-Cresyl Sulfate Detection Using a Molecularly Imprinted Polymer-Based Electrochemical Sensor

Archana,

Hashmi,

Bhardwaj

et al. 2024

ACS Appl. Polym. Mater.

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p-Cresyl sulfate (PCS) is readily absorbed in the bloodstream due to bacterial activity, which leads to the production of PCS using dietary tyrosine and phenylalanine by the bacteria residing in the gut. This molecule is responsible for maintaining the human health system and controlling the development of several diseases related to obesity, diabetes, cardiovascular diseases, chronic kidney diseases (CKDs), inflammatory bowel diseases, etc. Therefore, it is necessary to detect the level of PCS in urine or blood samples, which helps to identify CKDs. In this article, a poly(methacrylic acid) (PMAA)-based molecularly imprinted polymer (MIP) is used to develop a point-of-care device for PCS detection using an indigenously fabricated screen-printed carbon electrode. MIP is modified by further incorporating reduced graphene oxide (rGO)

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Structural, optical, thermal and electrochemical properties of rGO/PEDOT:PSS/PVP composite for supercapacitor electrode application

et al. 2022

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Investigation of optical properties, chemical network and electronic environments of polycaprolactone/reduced graphene oxide fiber nanocomposites

Cited by 10 publications

References 36 publications

Surface-Modified Polypyrrole-Coated PLCL and PLGA Nerve Guide Conduits Fabricated by 3D Printing and Electrospinning

Surface-Modified Polypyrrole-Coated PLCL and PLGA Nerve Guide Conduits Fabricated by 3D Printing and Electrospinning

Reduced Graphene Oxide Nanosheets Enhance the Sensitivity of p-Cresyl Sulfate Detection Using a Molecularly Imprinted Polymer-Based Electrochemical Sensor

Structural, optical, thermal and electrochemical properties of rGO/PEDOT:PSS/PVP composite for supercapacitor electrode application

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