Buscar
Mostrando ítems 1-10 de 1219
Environmental ageing studies of chemically modified micro and nanofibril phenol formaldehyde composites
(2013-08-01)
Cellulose micro and nano fibrils were extracted from banana macro fibres and chemically modified using sodium hydroxide, formic acid, 3-methacryloxy propyltrimethoxy silane. These untreated and chemically treated fibrils ...
ZnO nanostructures directly grown on paper and bacterial cellulose substrates without any surface modification layer
(2013-09-21)
In this report, hierarchical ZnO nano- and microstructures were directly grown for the first time on a bacterial cellulose substrate and on two additional different papers by hydrothermal synthesis without any surface ...
Chemical Modifications of Cyclodextrin and Chitosan for Biological and Environmental Applications: Metals and Organic Pollutants Adsorption and Removal
(2019-06-15)
New advances in polymer science and their possible applications have increased in recent years highlighting their important and desired properties. Regarding cyclodextrin and chitosan polymers, they are used in many fields ...
Characterization of Cellulose Nanocrystals Grafted with Organic Acid Chloride of Different Sizes
(Scrivener Publishing Llc, 2014-12-01)
In the work presented in this article surface chemical modification was applied to ramie cellulose nanocrystals by grafting organic acid chlorides presenting different lengths of the aliphatic chain. The objective of this ...
Physical and chemical changes in juvenile and mature woods of Pinus elliottii var. elliottii by thermal modification
(Springer, 2012-09-01)
This study is aimed at evaluating the effect of thermal treatment on the physical and chemical properties of juvenile and mature wood from Pinus elliottii. Boards were taken from 35-year-old P. elliottii var. elliottii ...
Raman and FT-IR investigation of neutron and fission-fragment irradiated DAP polymer
(2019-11-01)
The polymer Diallyl Phthalate (DAP), commonly used as solid-state nuclear track detector (SSNTD), has been characterized via optical microscopy and Raman and FT-IR spectroscopies in three distinct processes: i) without ...
Theoretical evaluation of chemical substitutions along the main chain of poly(3-hexylthienylene-vinylene) for solar cell applications
(2018-02-01)
In order to improve the efficiency of bulk-heterojunction organic solar cells, one can try to optimize the active layer through the use of new materials that provide improvements in the parameters that influence the final ...
Modifying electronic properties of ICBA through chemical substitutions for solar cell applications
(2017-08-01)
Fullerene derivatives are the most widely used type of acceptor material in the organic solar cells (OSCs) active layers, but there are still some problems to be overcome, such as increased solubility and adjustment of the ...
Functional modifications by physical treatments of dietary fibers used in food formulations
(Elsevier, 2017-06)
Chemical modifications of polysaccharides for food and non-food applications have been practiced for years to improve their functional properties. Recent concerns from the public to reduce the use and exposure of chemicals ...