Aerosol assisted self-assembly as a route to synthesize solid and hollow spherical lignin colloids and its utilization in layer by layer deposition
Jazyk angličtina Země Nizozemsko Médium print-electronic
Typ dokumentu časopisecké články
PubMed
27614582
DOI
10.1016/j.ultsonch.2016.09.001
PII: S1350-4177(16)30312-1
Knihovny.cz E-zdroje
- Klíčová slova
- Hollow and solid lignin colloids, Layer by layer deposition, UV absorbance by lignin,
- MeSH
- aerosoly MeSH
- dimethylsulfoxid chemie MeSH
- koloidy MeSH
- koncentrace vodíkových iontů MeSH
- lignin chemická syntéza chemie MeSH
- statická elektřina MeSH
- techniky syntetické chemie MeSH
- ultrazvukové vlny * MeSH
- velikost částic MeSH
- Publikační typ
- časopisecké články MeSH
- Názvy látek
- aerosoly MeSH
- dimethylsulfoxid MeSH
- koloidy MeSH
- lignin MeSH
Lignin, a major constituent of plant cell-wall and by-product of paper based industries is traditionally used for low value applications (heat or electricity generation), but its potential in high value utilization has also been widely reported. In this work, we synthesized lignin colloidal particles using ultrasonic spray-freezing route without any chemical functionalization of material, and stabilized it by electrostatic route. As per our knowledge, this technique is the first reported method which yields hollow/solid lignin colloids having good particle size control without any chemical functionalization of material. Dioxane soluble fraction of Alkali lignin (d-lignin) was used without any further chemical functionalization. d-lignin dissolved in DMSO was sprayed upon liquid nitrogen cooled copper plate using an ultrasonic nebulizer. The resulting frozen droplets were collected and found to possess hollow and solid morphology. Particles thus obtained were characterized for their size distribution and morphology, and compared to theoretically anticipated values. Size tunability of particles in relation to concentration of sprayed lignin solution was also studied. In addition to that, six layers of lignin colloids were deposited on quartz slide with the aid of negligible UV absorbing polyelectrolyte aqueous solution PDADMAC [Poly (diallyldimethylammonium chloride)]. Gradation in UV absorbing ability of lignin with increase in number of layers could be clearly observed. Hollow and solid lignin colloids, apart from their application in sunscreen cosmetics owing to their UV absorbing ability, show potential applications in drug delivery also.
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