A sandwich model of Cr(VI) adsorption and detoxification by Fenton modified chitosan

2020 ◽  
Author(s):  
Nanzhengfang Jia ◽  
Lingxiang Yun ◽  
Jinye Huang ◽  
Hui Chen ◽  
Chensi Shen ◽  
...  
Keyword(s):  
Modified Chitosan ◽  
Sandwich Model

Complex formation of modified chitosan and carboxymethyl cellulose and its effect on paper properties

TAPPI Journal ◽  
2009 ◽  
Vol 8 (6) ◽  
pp. 29-35 ◽  
Author(s):  
PEDRAM FATEHI ◽  
LIYING QIAN ◽  
RATTANA KITITERAKUN ◽  
THIRASAK RIRKSOMBOON ◽  
HUINING XIAO
Keyword(s):  
Carboxymethyl Cellulose ◽  
Polymer System ◽  
Layer By Layer ◽  
Paper Strength ◽  
Anionic Polymer ◽  
Paper Properties ◽  
Modified Chitosan ◽  
Layer By Layer Assembly ◽  
Polyelectrolyte Titration ◽  
Layer Assembly

The application of an oppositely charged dual polymer system is a promising approach to enhance paper strength. In this work, modified chitosan (MCN), a cationic polymer, and carboxymethyl cellulose (CMC), an anionic polymer, were used sequentially to improve paper strength. The adsorption of MCN on cellulose fibers was analyzed via polyelectrolyte titration. The formation of MCN/CMC complex in water and the deposition of this complex on silicon wafers were investigated by means of atomic force microscope and quasi-elastic light scattering techniques. The results showed that paper strength was enhanced slightly with a layer-by-layer assembly of the polymers. However, if the washing stage, which was required for layer-by-layer assembly, was eliminated, the MCN/CMC complex was deposited on fibers more efficiently, and the paper strength was improved more significantly. The significant improvement was attributed to the extra development of fiber bonding, confirmed further by scanning electron microscope observation of the bonding area of fibers treated with or without washing. However, the brightness of papers was somewhat decreased by the deposition of the complex on fibers. Higher paper strength also was achieved using rapid drying rather than air drying.

Progress on Modified Chitosan Applied in Drug Delivery System

2010 ◽  
Vol 7 (6) ◽  
pp. 458-464
Author(s):  
Xiao-Li WU ◽  
Can ZHANG ◽  
Qi-Neng PING
Keyword(s):  
Drug Delivery ◽  
Drug Delivery System ◽  
Delivery System ◽  
Modified Chitosan

scholarly journals Synthesis of modified chitosan TiO2 and SiO2 hydrogel nanocomposites for cadmium removal

2021 ◽  
pp. 101283
Author(s):  
Soudeh Banivaheb ◽  
Sasan Dan ◽  
Hassan Hashemipour ◽  
Maryam kalantari
Keyword(s):  
Cadmium Removal ◽  
Modified Chitosan ◽  
Hydrogel Nanocomposites

scholarly journals Chitosan as a Protective Matrix for the Squaraine Dye

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1171
Author(s):  
Halina Kaczmarek ◽  
Patryk Rybczyński ◽  
Piotr Maćczak ◽  
Aleksander Smolarkiewicz-Wyczachowski ◽  
Marta Ziegler-Borowska
Keyword(s):  
Solid State ◽  
Uv Radiation ◽  
Dye Degradation ◽  
Protective Coatings ◽  
Protective Action ◽  
High Energy ◽  
Modified Chitosan ◽  
Dye Release ◽  
Squaraine Dye ◽  
Chitosan Films

Chitosan was used as a protective matrix for the photosensitive dye-squaraine (2,4-bis[4-(dimethylamino)phenyl]cyclobutane-1,3-diol). The physicochemical properties of the obtained systems, both in solution and in a solid-state, were investigated. However, it was found that diluted chitosan solutions with a few percent additions of dye show an intense fluorescence, which is suppressed in the solid-state. This is related to the morphology of the heterogeneous modified chitosan films. The important advantage of using a biopolymer matrix is the prevention of dye degradation under the influence of high energy ultraviolet (UV) radiation while the dye presence improves the chitosan heat resistance. It is caused by mutual interactions between macromolecules and dye. Owing to the protective action of chitosan, the dye release in liquid medium is limited. Chitosan solutions with a few percent additions of squaraine can be used in biomedical imaging thanks to the ability to emit light, while chitosan films can be protective coatings resistant to high temperatures and UV radiation.

Novel amidinothiourea-modified chitosan microparticles for selective removal of hg(II) in solution

2021 ◽  
pp. 118273
Author(s):  
Qiongqiong Wang ◽  
Qifeng Dang ◽  
Chengsheng Liu ◽  
Xiaoyu Wang ◽  
Boyuan Li ◽  
...  
Keyword(s):  
Selective Removal ◽  
Chitosan Microparticles ◽  
Modified Chitosan
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