scholarly journals Synthesis and Application of N-methylphthalimidylazo Disperse Dyes to Cellulose Diacetate for High Wash Fastness

Materials ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 4924
Author(s):  
Sanghyun Yoon ◽  
Hyunjung Kim ◽  
Eunkyo Lee ◽  
Nahyun Oh ◽  
Sangcheon Kim ◽  
...  
Keyword(s):  
Value Added ◽  
Cellulosic Biomass ◽  
Alkali Resistance ◽  
Disperse Dyes ◽  
Hydroxyl Groups ◽  
Cellulose Diacetate ◽  
Wash Fastness ◽  
Washing Process ◽  
Azo Disperse Dyes ◽  
Wood Pulps

Cellulose diacetate fibers were prepared from cellulosic biomass with high α-cellulose contents such as purified cotton linters and wood pulps. Cellulose diacetate fibers are sensitive to alkaline solution, which causes hydrolysis of the acetate ester to hydroxyl groups, especially at high temperatures. Thus, the low alkali-resistance of cellulose acetate fibers makes it difficult to achieve high wash fastness by restricting the application of intense after-treatment, such as reduction clearing. A series of N-methylphthalimide-based high-washable azo disperse dyes were synthesized and their dyeing and fastness properties on cellulose diacetate fabrics were investigated. From the overall results obtained in this study, N-methylphthalimidylazo disperse dyes are expected to be a desirable alternative to high value-added dyes that can be used for high color fastness dyeing of cellulose diacetate with a minimal discharge of wastewater during washing process.

scholarly journals Chitosan Adsorbent Derivatives for Pharmaceuticals Removal from Effluents: A Review

Macromol ◽  
2021 ◽  
Vol 1 (2) ◽  
pp. 130-154
Author(s):  
Efstathios V. Liakos ◽  
Maria Lazaridou ◽  
Georgia Michailidou ◽  
Ioanna Koumentakou ◽  
Dimitra A. Lambropoulou ◽  
...  
Keyword(s):  
Emerging Contaminants ◽  
Low Cost ◽  
Value Added ◽  
Ph Effects ◽  
Hydroxyl Groups ◽  
Research Papers ◽  
Natural Polysaccharide ◽  
Best Fitting ◽  
Isotherm And Kinetic Models ◽  
Published Research

Chitin is mentioned as the second most abundant and important natural biopolymer in worldwide scale. The main sources for the extraction and exploitation of this natural polysaccharide polymer are crabs and shrimps. Chitosan (poly-β-(1 → 4)-2-amino-2-deoxy-d-glucose) is the most important derivative of chitin and can be used in a wide variety of applications including cosmetics, pharmaceutical and biomedical applications, food, etc., giving this substance high value-added applications. Moreover, chitosan has applications in adsorption because it contains amino and hydroxyl groups in its molecules, and can thus contribute to many possible adsorption interactions between chitosan and pollutants (pharmaceuticals/drugs, metals, phenols, pesticides, etc.). However, it must be noted that one of the most important techniques of decontamination is considered to be adsorption because it is simple, low-cost, and fast. This review emphasizes on recently published research papers (2013–2021) and briefly describes the chemical modifications of chitosan (grafting, cross-linking, etc.), for the adsorption of a variety of emerging contaminants from aqueous solutions, and characterization results. Finally, tables are depicted from selected chitosan synthetic routes and the pH effects are discussed, along with the best-fitting isotherm and kinetic models.

Synthesis and spectral properties of some azo disperse dyes containing a benzothiazole moiety

2013 ◽  
Vol 188 ◽  
pp. 173-177 ◽  
Author(s):  
E.O. Moradi Rufchahi ◽  
Hessamoddin Yousefi ◽  
Mojgan Mohammadinia
Keyword(s):  
Spectral Properties ◽  
Disperse Dyes ◽  
Azo Disperse Dyes

Wood-Polymer Composite Prepared by In Situ Synthesis of Copolymer within Wood and its Dimensional Stability

2010 ◽  
Vol 150-151 ◽  
pp. 1-5
Author(s):  
Yong Feng Li ◽  
Chi Jiang ◽  
Duo Jun Lv ◽  
Xiao Ying Dong ◽  
Yi Xing Liu
Keyword(s):  
Contact Angle ◽  
Porous Structure ◽  
Polymer Composite ◽  
Dimensional Stability ◽  
Value Added ◽  
Hydroxyl Groups ◽  
Wood Polymer ◽  
Volume Swelling ◽  
Wood Polymer Composite

In order to improve the value-added applications of low-quality wood, a novel Wood-Polymer Composite was fabricated by in-situ synthesis of copolymer from monomers within wood porous structure. The structure was characterized with SEM and FTIR, and its dimensional stability was also tested. The SEM observations showed that copolymer filled up wood pores and contact tightly with wood matrix, indicating strong interactions between them. FTIR analysis indicated that when the monomers copolymerized in situ wood porous structure, they also reacted with wood matrix by reaction of hydroxyl groups and ester groups, indicating chemical bond between the two phases, which is agreement with SEM observations. The volume swelling efficiency and contact angle of such composite were higher than those of wood, respectively, indicating good dimensional stability involving volume swelling efficiency and contact angle. Such composite could be potentially applied in fields of construction, traffic and indoor decoration.

Vapour pressures and heats of sublimation of some azo disperse dyes

2008 ◽  
Vol 105 (3) ◽  
pp. 112-114 ◽  
Author(s):  
K Nishida ◽  
Y Ando ◽  
K Ohwada ◽  
T Mori ◽  
M Koide ◽  
...  
Keyword(s):  
Disperse Dyes ◽  
Azo Disperse Dyes

scholarly journals Synthetic utility of 5-amino-6-cyano-2-phenylthieno[2,3-d] oxazole

2005 ◽  
Vol 70 (11) ◽  
pp. 1249-1253 ◽  
Author(s):  
V.R. Kanetkar ◽  
R.R. Walavalkar
Keyword(s):  
Ir Spectroscopy ◽  
Absorption Spectra ◽  
Polyester Fabric ◽  
Disperse Dyes ◽  
Fastness Properties ◽  
Visible Absorption ◽  
Synthetic Utility ◽  
Azo Disperse Dyes

This paper describes the synthesis of 5-amino-6-cyano-2-phenylthieno[ 2,3-d]oxazole and its utilization for the preparation of a range of azo disperse dyes. These aryl azo disperse dyes were applied on polyester fabric and their fastness properties were evaluated. The dyes were characterized by NMR and IR spectroscopy. The visible absorption spectra of these dyes were Recorded.

scholarly journals Facile Synthesis of Novel, Structurally Diverse Azo Disperse Dyes by Employing Ugi Four-Component Reaction

2021 ◽  
Vol 41 (4) ◽  
pp. 1703
Author(s):  
Xiaoyan Guo ◽  
Shuaijun Fang ◽  
Hongfei Qian ◽  
Gaofeng Feng
Keyword(s):  
Disperse Dyes ◽  
Facile Synthesis ◽  
Azo Disperse Dyes
Sign in / Sign up

Export Citation Format

Share Document