Dyeing Properties of Lac Dyes for Wool, Silk and Nylon

2011 ◽  
Vol 233-235 ◽  
pp. 817-820
Author(s):  
Bo Wei ◽  
Qiu Yuan Chen ◽  
Ren Cheng Tang ◽  
Guo Qiang Chen
Keyword(s):  
Electrostatic Interaction ◽  
Uptake Rate ◽  
Color Fastness ◽  
Dye Uptake ◽  
Amino Groups ◽  
Dyeing Properties ◽  
Initial Uptake Rate ◽  
Dyed Fabrics ◽  
Initial Uptake

The dyeing properties of lac dyes for wool, silk and nylon fibers were investigated, and compared in terms of dependence of dye uptake on pH, dyeing rates, and building-up performance as well as color hue and color fastness of dyed fabrics. For all the three fibers, the uptake of lac dyes was greatly influenced by pH, indicating that the electrostatic interaction between lac dyes and fibers predominantly contributes to lac adsorption. The maximum adsorption wavelength of dyed fabrics shifted to a higher value with increasing application pH, indicating the existence of bathochromic effect. Lac dyes showed the quickest initial uptake rate for silk, the slowest rate for wool. The capacity of lac uptake by three fibers was in the following order: wool > silk > nylon, this being in accord with the quantity of amino groups in these fibers. Dyed wool exhibited the best color fastness.

Application of Hyperbranched Polymer with Terminal Amino in Dyeing Process of Microfiber Synthetic Leather

2011 ◽  
Vol 393-395 ◽  
pp. 1114-1118
Author(s):  
Long Fang Ren ◽  
Guo Hui Zhao ◽  
Tao Tao Qiang ◽  
Jing Xian Wang ◽  
Xue Chuan Wang
Keyword(s):  
Uptake Rate ◽  
Hyperbranched Polymer ◽  
Succinic Anhydride ◽  
Amino Group ◽  
Dye Uptake ◽  
Amino Groups ◽  
Synthetic Leather ◽  
Dyeing Process ◽  
Terminal Amino ◽  
Polymerization Method

Hyperbranched polymer with different contents of terminal amino group synthesized with succinic anhydride and DETA through the molten polymerization method was used in the dying process of microfiber synthetic leather substrate as color fixing agent. The effect on dye-uptake, surface chromas of microfiber synthetic leather substrate, wet and dry rub fastness was discussed. The result indicated that when the dosage of hyperbranched polymer with 5.85% terminal amino groups was 0.8%, the dye uptake rate was 92.92% and surface chroma was the best, the wet and dry rub fastness of microfiber synthetic leather substrate were almost unchanged.

scholarly journals PERIODIC CHANGES IN RATE OF AMINO ACID UPTAKE DURING YEAST CELL CYCLE

1973 ◽  
Vol 58 (2) ◽  
pp. 401-409 ◽  
Author(s):  
B. L. A. Carter ◽  
H. O. Halvorson
Keyword(s):  
Cell Cycle ◽  
Amino Acids ◽  
Amino Acid ◽  
Uptake Rate ◽  
Amino Acid Uptake ◽  
Acid Uptake ◽  
Uptake System ◽  
Transport Capacity ◽  
Initial Uptake Rate ◽  
Initial Uptake

Uptake of amino acids is a complex process but in cells growing with ammonia as sole nitrogen source the initial uptake rate of amino acids is a measure of the transport capacity of the uptake system (permease). In synchronous cultures of Saccharomyces cerevisiae amino acids were transported at all stages of the cell cycle. However, for any one amino acid the initial uptake rate was constant for most of the cycle and doubled during a discrete part of the cycle. Thus, for a variety of amino acids the functioning amino acid transport capacity of the membrane doubles once per cycle at a characteristic stage of the cycle. Arginine, valine, and phenylalanine exhibit periodic doubling of uptake rate at different stages of the cell cycle indicating that the transport of these amino acids is mediated by three different systems. Serine, phenylalanine, and leucine exhibit periodic doubling of the uptake rate at the same stage of the cycle. However, it is unlikely that serine and phenylalanine share the same transport system since the uptake of one is not inhibited by the other amino acid. This phenomenon is analogous to the periodic synthesis of soluble enzymes observed in S. cerevisiae.

The Effect of Hyperbranched Polymers on the Dyeing Properties of Polypropylene Fibers

2011 ◽  
Vol 399-401 ◽  
pp. 1059-1062
Author(s):  
Xu Huang ◽  
Wei Dong Zhang ◽  
Shun Bin Ma
Keyword(s):  
Physical Properties ◽  
Hyperbranched Polymer ◽  
Polypropylene Fiber ◽  
Fiber Spinning ◽  
Polypropylene Fibers ◽  
Dye Uptake ◽  
Dyeing Properties ◽  
Washing Fastness ◽  
Polar Groups ◽  
Dyed Fabrics

3% hyperbranched polymer was incorporated into polypropylene and dyed with Disperse Blue 2BLN. The observed enhancement of dye uptake can be attributed to the introduction of polar groups. The finding that dye uptake on the modified fiber reached a maximum at 110°C suggests that “saturation” had occurred. While the washing fastness of dyed fabrics made from polypropylene fiber which had been modified with hyperbranched polymer was very good, the fastness of the dyeings to light was poor. The incorporation of 3% hyperbranched polymer into polypropylene prior to fiber spinning had no effect on the physical properties of the fiber，however markedly enhanced the dyeability of polypropylene.

Relationship between the initial uptake rate and cytotoxicity of irinotecan (CPT-11) and its metabolites

2000 ◽  
Vol 118 (4) ◽  
pp. A519
Author(s):  
Tadashi Ikegami ◽  
Linan Ha ◽  
Susan Ceryak ◽  
Kunihiko Kobayashi ◽  
Yasushi Matsuzaki ◽  
...  
Keyword(s):  
Uptake Rate ◽  
Initial Uptake Rate ◽  
Initial Uptake

Dyeing of Silk and Nylon 6 Fibers with Baicalin

2011 ◽  
Vol 331 ◽  
pp. 287-290 ◽  
Author(s):  
Xiao Chun Li ◽  
Ji Liang Cao
Keyword(s):  
Sodium Chloride ◽  
Nylon 6 ◽  
Natural Dye ◽  
Process Conditions ◽  
Color Fastness ◽  
Optimal Process ◽  
Dyeing Properties ◽  
Dyed Fabrics ◽  
Temperature Time

Natural dye baicalin was applied to dye silk and nylon 6 fibers. The effects of dyeing temperature, time, pH and dosages of sodium chloride and baicalin on dyeing properties of silk and nylon 6 fibers were analyzed, the color fastness of dyed fabrics also investigated. It was found that, the optimal process conditions were as follows: dyeing at 90oC(silk) or 80oC(Nylon 6), with pH 4, for about 60min. The built-up properties of baicalin on silk and nylon 6 fabrics were good, the color fastness of dyed fabrics were above 3-4 grade.

The initial uptake rate in precursor mediated adsorption

1994 ◽  
Vol 303 (1-2) ◽  
pp. L354-L360 ◽  
Author(s):  
Massimo Tomellini
Keyword(s):  
Uptake Rate ◽  
Initial Uptake Rate ◽  
Initial Uptake

Kinetics of the Imidazolium Ring-Opening of mRNA 5'-cap Analogs in Aqueous Alkali

2006 ◽  
Vol 71 (4) ◽  
pp. 567-578 ◽  
Author(s):  
Alicja Stachelska ◽  
Zbigniew J. Wieczorek ◽  
Janusz Stępiński ◽  
Marzena Jankowska-Anyszka ◽  
Harri Lönnberg ◽  
...  
Keyword(s):  
Electrostatic Interaction ◽  
Ring Opening ◽  
Nucleophilic Attack ◽  
Amino Groups ◽  
Hydroxide Ion ◽  
Methyl Group ◽  
Structural Modifications ◽  
Alkyl Groups ◽  
Imidazolium Ring ◽  
Kinetics Of

Second-order rate constants for the hydroxide-ion-catalyzed imidazolium ring-opening of several mono- and dinucleosidic analogs of mRNA 5'-cap have been determined. Intramolecular stacking of the two nucleobases in the dinucleosidic analogs, m7GpppN (m7G = 7-methylguanosine, N = 5'-linked nucleoside), and electrostatic interaction between the N-alkylated imidazolium ring and phosphate moiety have been shown to shield the m7G moiety against the nucleophilic attack of hydroxide ion. In addition, the effect of methylation of the nucleobase amino groups and replacement of the 7-methyl group with other alkyl groups have been studied. The influence of all the structural modifications studied turned out to be modest, the cleavage rates of the most and least reactive analogs (with the exception of non-phosphorylated nucleosides) differing only by a factor of 5.

Optimization of the color fastness and mechanical properties of pigment dyed PC fabric

2018 ◽  
Vol 47 (5) ◽  
pp. 396-405
Author(s):  
Abdul Azeem ◽  
Sharjeel Abid ◽  
Noman Sarwar ◽  
Shahzaib Ali ◽  
Ahsan Maqsood ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Design Methodology ◽  
Industrial Process ◽  
Color Fastness ◽  
Content Type ◽  
Washing Fastness ◽  
Market Values ◽  
Dyed Fabrics ◽  
Bending Length ◽  
Practical Implications

Purpose The purpose of this study is to improve the mechanical properties and reduce the stiffness/harshness of fabric associated with the pigment dyeing of textiles. Design/methodology/approach The fabric was pigment dyed with the addition of three different softeners and binders. The fabric was then analyzed to have improved textile properties by measuring tear strength, bending length, crocking and washing fastness tests. Findings The conventional route of pigment dyeing (without any softener) imparted poor mechanical and rubbing fastness. The softener-added recipe provided better mechanical, rubbing and washing fastness, and the stiffness values were oppressed as well. Practical implications Because of reduced stiffness, increased fastness and mechanical properties, the use of softener with pigment dyeing can improve the market values and satisfaction of the dyed fabrics. The finished product would also have better life and endurance. The process can be modified easily to have a better end-product with a negligible cost addition in industrial process, as softeners are cheap and used in low (10-20 g/l) in industrial settings without affecting the required shades. Originality/value This is the first report, to the best of the author’s knowledge, on the optimization of pigment dyeing of PC fabric with the addition of Helizarin and perapret softeners in dyeing bath.

Ultrasound Dyeing of Polyester Using Natural Colorant from Melastoma malabathricum l.

2015 ◽  
Vol 1134 ◽  
pp. 66-69 ◽  
Author(s):  
Tengku Muna Shaheera Tuan Zainal Abidin ◽  
Mohd Rozi Ahmad ◽  
Muhammad Ismail Ab Kadir ◽  
Nor Juliana Mohd Yusof ◽  
Wan Yunus Wan Ahmad
Keyword(s):  
Sodium Hydroxide ◽  
Conventional Method ◽  
Alkaline Treatment ◽  
Polyester Fabric ◽  
Dye Uptake ◽  
Natural Colorant ◽  
Melastoma Malabathricum ◽  
Dyed Fabrics ◽  
Ultrasound Dyeing ◽  
Lower Temperature

This paper reports on the application of natural dyes on polyester fabric. Melastoma malabathricum l. was extracted using conventional method of boiling for an hour. Plain lightweight polyester fabric was treated with sodium hydroxide as an alkaline treatment and Chitosan prior to dyeing in an attempt to increase the dye uptake. The dye extract of Melastoma malabathricum l. was applied on the polyester fabric at 85°C for an hour by exhaustion dyeing and 40 minutes for ultrasound dyeing. The colors of the dyed fabrics were measured using colour spectrophotometer and evaluated for washfastness. Ultrasound dyeing gave deeper colour shades to the fabric even though dyeing was conducted at lower temperature for 40 minutes. The alkaline treated fabrics dyed using ultrasound gave lower value of L* which indicate higher dye uptake and darker colour. The ratings for colourfastness to washing were between 4/5 to 5.

Dyeing Properties of Reactive Dyes on Hemp Fabrics

2011 ◽  
Vol 332-334 ◽  
pp. 126-129
Author(s):  
Si Tan ◽  
Jian Ming Wang
Keyword(s):  
Reactive Dyes ◽  
Color Fastness ◽  
Dyeing Properties

This research focuses on the promotion of China-hemp in the dye bath, the effect of salt, alkali, time and temperature on the dyeing properties. The optimum processes of thermostability of China-hemp dyeing with reactive dyes are determined by comparing the effect of different concentration of the agents on the K∕S value and color fastness.

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