Magnetic applications of nanocellulose

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Presentation transcript:

Magnetic applications of nanocellulose Nikorn Laocharoen (465454) 26 Feb 2015 Nanotechnology in Forest Biomaterials

What is the magnetic of nanocellulose? What is magnet? Material or object that produces a magnetic field by itself Magnetic field is invisible Element: Fe, Co, Ni What is the magnetic of nanocellulose? Combination of magnetic nanoparticle and nanocellulose Resulting in improved properties; mechanical strength, more flexible, and Magnetic, Thermal property Emulsion, Impregnation Grafting, Composite etc. Nano cellulose Magnetic particle

Application Fields Medical/ Biotechnology Tumor/ Cancer Drug Delivery Nano emulsion Magnetic hybrid cellulose aerogels Magnetic nanopaper Nano composites Films for packaging Rubber Nanofiber

Application in medical treatment Inhibit growth of tumor cell Hard core (inner) CoFe2O4 Soft shell (outer) MnFe2O4 Magnetic nanoparticles Magnetic Fluid Hyperthermia (MFH): Magnetic nanoparticles are injected into the tumor Apply the external magnetic field Magnetic thermal induction by nanoparticles Tumor regression is observed Superior to conventional anticancer drug

Application in medical/ biotechnology Drug and Biomolecules delivery: Engineered nanoparticles Commercialized level How to obtain? Iron oxide Size < 100 nm Surface functionalization to magnetic nanoparticles Directly adsorption of drug onto the surface Surface coating (Inorganic; silica, gold) for biocompatibility Functionalized with DNA carrier Magnetically triggered release of drugs and biomolecules

Application in Colloid and Interface compaction Features: Tunable and strong mechanical property Used as templates for making lightweight porous magnetic aerogels Then, compact such aerogels to form magnetic nanopaper Advantages: Lightweight Porous (98%) with high surface area Flexible Absorb large amount of water Apply in microfluidic devices and electronic actuators

Ferrite Rubber Composite Application in Nano composites Magnetic self standing films Advantages: Anti-counterfeit in security documents Magnetic ink Coating Micro-patterning CNC–inorganic (Barium Ferrite) dispersion and then removal of water via filtration (light brown color) Put in magnet and use magnetic field viewer to distinguish Composite material in natural rubber Advantages: Low weight (than ceramic) Resistance to corrosion Highly flexible Ease of machining and forming Ferrite powder Ferrite Rubber Composite (FRC) Composite material in nanofiber Advantages: Improved mechanical strength Strong interaction with water (owing to The presence of CNC) Biocompatible (may apply as fluid Hyperthermia) Electrospinned PVA fiber composite with magnetic CNC-inorganic

Conclusion Magnetic application illustrates broad range of utilization High impact on well-being life of humankind in the future (tumor/cancer therapy) Many of the magnetic application are still in research and development phase

Personal perspective on this topic Long term investigation from utilizing magnetic nanocellulose in human Recycling aspects of some composite materials (is it easily recycled or reused) Take the advantages of magnetic feature for heavy metal seperation (i.e. water treatment) Possibility for scale up production (cost of large scale production, market demand)

References: Bonini M., Berti D., Baglioni P., 2013. Nanostructures for magnetically triggered release of drugs and biomolecules. Current Opinion in Colloid & Interface Science. 18, p.459–467. Jordan A., Scholz R., Wust P., FaK hling H., Felix R., 1998. Magnetic fuid hyperthermia (MFH): Cancer treatment with AC magnetic field induced excitation of biocompatible superparamagnetic nanoparticles. Journal of Magnetism and Magnetic Materials. 201, p.413-419. Lee J., Jang J., Choi J., Ho Moon S., Noh S., Kim J., Kim J., Kim I., In Park K., Cheon J., 2011. Exchange-coupled magnetic nanoparticles for efficient heat induction. Nature Nanotechnology. 6, p.418-422. Makleda, M.H., Matsuib T., Tsudab H., Mabuchib H., El-Mansya M.K., Moriib K., 2004. Magnetic and dynamic mechanical properties of barium ferrite–natural rubber composites. Journal of Materials Processing Technology. 160, p.229–233. Olsson R.T., Azizi Samir M.A.S., Salazar-Alvarez G., Belova L., Ström V., Berglund L.A., Ikkala O., Nogue J.and Gedd U.W., 2010. Making flexible magnetic aerogels and stiff magnetic nanopaper using cellulose nanofibrils as templates. Nature nanotechnology. 5, p.584-588. Ridi F., Bonini M., Baglioni P., 2013. Magneto-responsive nanocomposites: Preparation and integration of magnetic nanoparticles into films, capsules, and gels. Advances in Colloid and Interface Science. 207, p.3-13.