Influence of multi-walled carbon nanotubes on the physico-chemical and biological responses of chitosan-based hybrid hydrogels

Garnica-Palafox, I. M.; Estrella-Monroy, H. O.; Vázquez-Torres, Nadia Adriana; Álvarez-Camacho, M.; Castell-Rodrı́guez, Andrés; Sánchez-Arévalo, Francisco M.

doi:10.1016/j.carbpol.2020.115971

Cited by 23 publications

(19 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Clearly, the crystallinity increased along with the content of CNPs (it almost doubled for the last two cases compared to blank PDMS). This enhancement in crystallinity suggests that the CNPs served as nucleation sites where the polymeric chains of PDMS can initiate their folding arrangement, as observed in other polymeric matrices filled with carbon nanoparticles [ 37 ]. The relevance of this physical interaction is that an increase in crystallinity yields a decrease in the entropy of the nanocomposite, improving the photomechanical response triggered by absorption of NIR light.…”

Section: Resultsmentioning

confidence: 91%

See 1 more Smart Citation

Photomechanical Polymer Nanocomposites for Drug Delivery Devices

et al. 2021

View full text Add to dashboard Cite

We demonstrate a novel structure based on smart carbon nanocomposites intended for fabricating laser-triggered drug delivery devices (DDDs). The performance of the devices relies on nanocomposites’ photothermal effects that are based on polydimethylsiloxane (PDMS) with carbon nanoparticles (CNPs). Upon evaluating the main features of the nanocomposites through physicochemical and photomechanical characterizations, we identified the main photomechanical features to be considered for selecting a nanocomposite for the DDDs. The capabilities of the PDMS/CNPs prototypes for drug delivery were tested using rhodamine-B (Rh-B) as a marker solution, allowing for visualizing and quantifying the release of the marker contained within the device. Our results showed that the DDDs readily expel the Rh-B from the reservoir upon laser irradiation and the amount of released Rh-B depends on the exposure time. Additionally, we identified two main Rh-B release mechanisms, the first one is based on the device elastic deformation and the second one is based on bubble generation and its expansion into the device. Both mechanisms were further elucidated through numerical simulations and compared with the experimental results. These promising results demonstrate that an inexpensive nanocomposite such as PDMS/CNPs can serve as a foundation for novel DDDs with spatial and temporal release control through laser irradiation.

show abstract

Section: Resultsmentioning

confidence: 91%

“…The diffraction patterns were recorded over the

range of 10 to 70° with a scan rate of 0.4 °min

. The crystallinity percentage was calculated using a cut and weight approach as reported in the literature [ 37 ].…”

Section: Methodsmentioning

confidence: 99%

Photomechanical Polymer Nanocomposites for Drug Delivery Devices

et al. 2021

View full text Add to dashboard Cite

show abstract

“… 61 The third step is related to the polymer cleavage above 400 °C. 61 − 64 The TGA results indicate that the presence of OCT-MMT nanoparticles improves the thermal stability of the polymer matrix. The effect of OCT-MMT is more significant in the last stage of degradation, where polymer cleavage occurs.…”

Section: Resultsmentioning

confidence: 99%

Green Electrospun Membranes Based on Chitosan/Amino-Functionalized Nanoclay Composite Fibers for Cationic Dye Removal: Synthesis and Kinetic Studies

et al. 2021

View full text Add to dashboard Cite

Chitosan/poly(vinyl alcohol)/amino-functionalized montmorillonite nanocomposite electrospun membranes with enhanced adsorption capacity and thermomechanical properties were fabricated and utilized for the removal of a model cationic dye (Basic Blue 41). Effects of nanofiller concentrations (up to 3.0 wt %) on the morphology and size of the nanofibers as well as the porosity and thermomechanical properties of the nanocomposite membranes are studied. It is shown that the incorporation of the nanoclay particles with ∼10 nm lateral sizes into the polymer increases the size of the pores by about 80%. To demonstrate the efficiency of the adsorbents, the dye removal rate is investigated as a function of pH, adsorbent dosage, dye concentration, and nanofiller loading. The highest and fastest dye removal occurs for the nanofibrous membranes containing 2 wt % nanofiller, where about 80% of the cationic dye is removed after 15 min. This performance is at least 20% better than the pristine chitosan/poly(vinyl alcohol) membrane. The thermal stability and compression resistance of the nanocomposite membranes are found to be higher than those of the pristine membrane. In addition, reusability studies show that the dye removal performance of this nanocomposite membrane reduces by only about 5% over four cycles. The adsorption kinetics is explained by the Langmuir isotherm model and is expressed by a pseudo-second-order kinetic mechanism that determines a spontaneous chemisorption process. The results of this study provide a valuable perspective on the fabrication of high-performance, reusable, and efficient electrospun fibrous nanocomposite adsorbents.

show abstract

“…Other possible applications of polysaccharides as carbon nanoparticle carriers are summarised and presented in Table 1. Chitosan Tissue engineering and biomedical applications [143] Electrolyte membranes [144] Cellulose Smart papers for multifunctional sensing [145] Scaffold for bone regeneration [146] Thermal energy storage [147] Membranes for water filtration [148] Alginate [149]…”

Section: Filmsmentioning

confidence: 99%

Polysaccharides Composite Materials as Carbon Nanoparticles Carrier

Krystyjan

Khachatryan

et al. 2022

Polymers

View full text Add to dashboard Cite

Nanotechnology is a dynamically developing field of science, due to the unique physical, chemical and biological properties of nanomaterials. Innovative structures using nanotechnology have found application in diverse fields: in agricultural and food industries, where they improve the quality and safety of food; in medical and biological sciences; cosmetology; and many other areas of our lives. In this article, a particular attention is focused on carbon nanomaterials, especially graphene, as well as carbon nanotubes and carbon quantum dots that have been successfully used in biotechnology, biomedicine and broadly defined environmental applications. Some properties of carbon nanomaterials prevent their direct use. One example is the difficulty in synthesizing graphene-based materials resulting from the tendency of graphene to aggregate. This results in a limitation of their use in certain fields. Therefore, in order to achieve a wider use and better availability of nanoparticles, they are introduced into matrices, most often polysaccharides with a high hydrophilicity. Such composites can compete with synthetic polymers. For this purpose, the carbon-based nanoparticles in polysaccharides matrices were characterized. The paper presents the progress of ground-breaking research in the field of designing innovative carbon-based nanomaterials, and applications of nanotechnology in diverse fields that are currently being developed is of high interest and shows great innovative potential.

show abstract

Influence of multi-walled carbon nanotubes on the physico-chemical and biological responses of chitosan-based hybrid hydrogels

Cited by 23 publications

References 65 publications

Photomechanical Polymer Nanocomposites for Drug Delivery Devices

Photomechanical Polymer Nanocomposites for Drug Delivery Devices

Green Electrospun Membranes Based on Chitosan/Amino-Functionalized Nanoclay Composite Fibers for Cationic Dye Removal: Synthesis and Kinetic Studies

Polysaccharides Composite Materials as Carbon Nanoparticles Carrier

Contact Info

Product

Resources

About