نتایج جستجو برای: cellulose nanocrystals

تعداد نتایج: 39422  

Journal: :Jurnal Selulosa 2021

Cellulose and chitin are two of the most abundant biopolymer on earth, have been attracted a lot interest from many researchers, especially related to their nanoparticles form. Recently method extract them into nanoscale materials mostly by mineral or liquid acid hydrolysis, such as sulfuric hydrochloric acid. Despite high yield production, disadvantages produced use hydrolysis catalyst, low th...

2010
Gilberto Siqueira Julien Bras Alain Dufresne

Cellulose is the most abundant biomass material in nature. Extracted from natural fibers, its hierarchical and multi-level organization allows different kinds of nanoscaled cellulosic fillers—called cellulose nanocrystals or microfibrillated cellulose (MFC)—to be obtained. Recently, such cellulose nanoparticles have been the focus of an exponentially increasing number of works or reviews devote...

2016
Sung Min Pyo Martina Meinke Cornelia M. Keck Rainer H. Müller

Rutin is a well-known antioxidant from the group of flavonoids. Its use in cosmetic dermal products is, however, limited due to its poor water solubility. In order to increase rutin saturation solubility and improve the diffusion to the skin, rutin nanocrystals were produced by the smartCrystal process, e.g., bead milling followed by high pressure homogenization. Rutin nanocrystals were further...

Journal: :Biomacromolecules 2008
Youssef Habibi Alain Dufresne

Cellulose and starch nanocrystals obtained from the acid hydrolysis of ramie fibers and waxy maize starch granules, respectively, were subjected to isocyanate-mediated reaction to graft polycaprolactone (PCL) chains with various molecular weights on their surface. Grafted nanoparticles were characterized by X-ray diffraction analysis and contact angle measurements. We observed that the nanopart...

Journal: :Inorganics (Basel) 2021

Metal-organic frameworks have attracted a great deal of attention for future applications in numerous areas, including gas adsorption. However, order them to reach their full potential substrate provide an anchor may be needed. Ideally, this should environmentally friendly and renewable. Cellulose nanofibrils show area. Here we present hybrid material created from the self-assembly zeolitic imi...

2011
Hasan Sadeghifar Ilari Filpponen Sarah P. Clarke Dermot F. Brougham Dimitris S. Argyropoulos

Cellulose nanocrystals (CNCs) were prepared by acidic hydrolysis of cotton fibers (Whatman #1 filter paper). In our efforts to select conditions in which the hydrolysis media does not install labile protons on the cellulose crystals, a mineral acid other than sulfuric acid (H2SO4) was used. Furthermore, in our attempts to increase the yields of nanocrystals ultrasonic energy was applied during ...

Journal: :Biomacromolecules 2010
Justin O Zoppe Youssef Habibi Orlando J Rojas Richard A Venditti Leena-Sisko Johansson Kirill Efimenko Monika Osterberg Janne Laine

Cellulose nanocrystals (CNCs) or nanowhiskers produced from sulfuric acid hydrolysis of ramie fibers were used as substrates for surface chemical functionalization with thermoresponsive macromolecules. The CNCs were grafted with poly(N-isopropylacrylamide) brushes via surface-initiated single-electron transfer living radical polymerization (SI-SET-LRP) under various conditions at room temperatu...

Journal: :Journal of colloid and interface science 2012
Justin O Zoppe Richard A Venditti Orlando J Rojas

Cellulose nanocrystals (CNCs) from ramie fibers are studied as stabilizers of oil-in-water emulsions. The phase behavior of heptane and water systems is studied, and emulsions stabilized by CNCs are analyzed by using drop sizing (light scattering) and optical, scanning, and freeze-fracture electron microscopies. Water-continuous Pickering emulsions are produced with cellulose nanocrystals (0.05...

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