Investigation of magnetic silica with thermoresponsive chitosan coating for drug controlled release and magnetic hyperthermia application

Pon-On, Weeraphat; Tithito, Tanatsaparn; Maneeprakorn, Weerakanya; Phenrat, Tanapon; Tang, I‐Ming

doi:10.1016/j.msec.2018.11.076

Cited by 43 publications

(14 citation statements)

References 45 publications

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“…Lower intensity of both ZHN-SDS-Chi and ZHN-SDS-BP-Chi compared to their respective uncoated form indicates that the chitosancoating process has resulted into the disordered layered structure, due to the influence of the amorphous structure of the chitosan (Zhan et al 2003;Sobh et al 2019). The reduction of peak intensity as a result of chitosan-coating process show good agreement with the several previous studies (Dorniani et al 2013;Mulia et al 2019;Pon-On et al 2019). The PXRD analysis also reveals that the chitosan-coating process not only affect the intensity of the diffraction peaks, but also broadened the diffraction peaks.…”

Section: Pxrd Analysissupporting

confidence: 90%

Chitosan as a coating material in enhancing the controlled release behaviour of zinc hydroxide nitrate–sodium dodecylsulphate–bispyribac nanocomposite

et al. 2020

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The aim of this study is to modulate the controlled release properties of zinc hydroxide nitrate-sodium dodecylsulphatebispyribac (ZHN-SDS-BP) nanocomposite, by coating the nanocomposite using chitosan. This study was conducted as part of an effort to reduce the environmental problems caused by the over-use of pesticides. The characterisation study shows that chitosan had been successfully coated onto the outer surface of the ZHN-SDS-BP (BP concentration of 0.05 M) without changing the types of ions intercalated in its interlayer gallery. The chitosan-coated nanocomposite, ZHN-SDS-BP-Chi also possesses a better thermal stability compared to the uncoated nanocomposite. Owing to the polycationic, hygroscopic nature, and gelation ability of chitosan, the chitosan coating was found to significantly prolong the release of bispyribac. The ZHN-SDS-BP-Chi showed a better performance in releasing pesticides, with prolonged release time ranging from 462 to 5349 min, compared to 74 to 4117 min for the uncoated nanocomposites. The release kinetic studies reveal that the release of bispyribac from the ZHN-SDS-BP-Chi is controlled by a pseudo-second-order kinetic model, thus signifying that the release mechanism is via dissolution and ion-exchange processes. The potential of chitosan in slowing the release of BP from ZHN-SDS-BP-Chi will hopefully contribute to minimise the risk of pollution resulting from the excessive use of pesticides.

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Section: Pxrd Analysissupporting

confidence: 90%

Chitosan as a coating material in enhancing the controlled release behaviour of zinc hydroxide nitrate–sodium dodecylsulphate–bispyribac nanocomposite

et al. 2020

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“…Chitosan was also used as a thermoresponsive coating on magnetic silica nanoparticles for controlled drug release and magnetic hypothermia applications. Pon-On et al [99] encapsulated magnetic silica particles within a chitosan-g-N-isopropylacrylamide polymer matrix. This material exhibited superior paramagnetic behavior, and in an alternating magnetic field (AMF), it acted as a heat source with a specific absorption rate of 8.36 Wg −1 .…”

Section: Biopolymer Coatings On Nanoparticlesmentioning

confidence: 99%

Biopolymer Coatings for Biomedical Applications

Nathanael

2020

Polymers

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Biopolymer coatings exhibit outstanding potential in various biomedical applications, due to their flexible functionalization. In this review, we have discussed the latest developments in biopolymer coatings on various substrates and nanoparticles for improved tissue engineering and drug delivery applications, and summarized the latest research advancements. Polymer coatings are used to modify surface properties to satisfy certain requirements or include additional functionalities for different biomedical applications. Additionally, polymer coatings with different inorganic ions may facilitate different functionalities, such as cell proliferation, tissue growth, repair, and delivery of biomolecules, such as growth factors, active molecules, antimicrobial agents, and drugs. This review primarily focuses on specific polymers for coating applications and different polymer coatings for increased functionalization. We aim to provide broad overview of latest developments in the various kind of biopolymer coatings for biomedical applications, in order to highlight the most important results in the literatures, and to offer a potential outline for impending progress and perspective. Some key polymer coatings were discussed in detail. Further, the use of polymer coatings on nanomaterials for biomedical applications has also been discussed, and the latest research results have been reported.

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“…Other work has been developed to enhance the particles dispersion and biocompatibility in biological solutions using thermal seed of alloys, iron oxides as colloidal mediators, and Ni-Cu nanoparticles [17][18][19][20][21][22][23]. Although there have been many works to optimize the heating power-related factors, nanoparticles still represent considerable technical challenges like the formation of clusters and agglomerates, which negatively affect the total output heating power [24,25]. Core/shell nanospheres seem to be a promising material that can solve all the previously mentioned heating powerrelated challenges [26][27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Superparamagnetic Fe/Au Nanoparticles and Their Feasibility for Magnetic Hyperthermia

et al. 2021

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Today, magnetic hyperthermia constitutes a complementary way to cancer treatment. This article reports a promising aspect of magnetic hyperthermia addressing superparamagnetic and highly Fe/Au core-shell nanoparticles. Those nanoparticles were prepared using a wet chemical approach at room temperature. We found that the as-synthesized core shells assembled with spherical morphology, including face-centered-cubic Fe cores coated and Au shells. The high-resolution transmission microscope images (HRTEM) revealed the formation of Fe/Au core/shell nanoparticles. The magnetic properties of the samples showed hysteresis loops with coercivity (HC) close to zero, revealing superparamagnetic-like behavior at room temperature. The saturation magnetization (MS) has the value of 165 emu/g for the as-synthesized sample with a Fe:Au ratio of 2:1. We also studied the feasibility of those core-shell particles for magnetic hyperthermia using different frequencies and different applied alternating magnetic fields. The Fe/Au core-shell nanoparticles achieved a specific absorption rate of 50 W/g under applied alternating magnetic field with amplitude 400 Oe and 304 kHz frequency. Based on our findings, the samples can be used as a promising candidate for magnetic hyperthermia for cancer therapy.

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Investigation of magnetic silica with thermoresponsive chitosan coating for drug controlled release and magnetic hyperthermia application

Cited by 43 publications

References 45 publications

Chitosan as a coating material in enhancing the controlled release behaviour of zinc hydroxide nitrate–sodium dodecylsulphate–bispyribac nanocomposite

Chitosan as a coating material in enhancing the controlled release behaviour of zinc hydroxide nitrate–sodium dodecylsulphate–bispyribac nanocomposite

Biopolymer Coatings for Biomedical Applications

Superparamagnetic Fe/Au Nanoparticles and Their Feasibility for Magnetic Hyperthermia

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