Characteristics of Liquid Ammonia Treated and Sodium Hydroxide Mercerized High Wet Modulus Rayon and Cotton Fabrics

1985 ◽  
Vol 4 (1) ◽  
pp. 25-30
Author(s):  
Lenore Cheek ◽  
Christine M. Ladisch
Keyword(s):  
Sodium Hydroxide ◽  
Liquid Ammonia ◽  
Cotton Fabrics

Dyeing and Mechanical Properties of Cotton Fabrics Treated with Sodium Hydroxide/Liquid Ammonia and Liquid Ammonia/Sodium Hydroxide

2000 ◽  
Vol 70 (4) ◽  
pp. 328-332 ◽  
Author(s):  
Tomiji Wakida ◽  
Kyoko Kida ◽  
Muncheul Lee ◽  
Soyeung Bae ◽  
Hiromu Yoshioka ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Sodium Hydroxide ◽  
Liquid Ammonia ◽  
Cotton Fabrics

Extraktionen von Ginsenosiden aus Ginseng-Wurzeln mit flüssigem Ammoniak, Methanol-Wasser oder Wasser/ Extractions of Ginsenosidesj from Ginseng Roots with Liquid Ammonia, Methanol-Water or Water

2000 ◽  
Vol 55 (3-4) ◽  
pp. 326-332 ◽  
Author(s):  
In-Ho Cho ◽  
Eberhard Hohaus ◽  
Axel Lehnen ◽  
Harro Lentz
Keyword(s):  
Sodium Hydroxide ◽  
Liquid Ammonia ◽  
Sodium Hydroxide Solution ◽  
Extraction Methods ◽  
The Other ◽  
Simultaneous Increase ◽  
Hydroxide Solution ◽  
High Yields

Abstract Extractions of ginsenosides from ginseng roots with liquid ammonia, methanol/water (60:40; v/v) or water were carried out. The extracts have been analyzed qualitatively and quantitatively to valuate yield and selectivity of extractions of ginsenosides. Water supplied the lowest yield. The yields of extracts with liquid ammonia were higher than those with m ethanol-water (60%). Yields of the ginsenosides Rb1, Rb2, Rc and Rd by extracting with liquid ammonia are about twice as much as those of the extraction with methanol-water (60%). It was proved by HPLC that malonyl-ginsenosides m -Rb1 m-Rb2, m-Rc and m-Rd were converted to the corresponding neutral ginsenosides by extraction with liquid ammonia. Because of high yields of extracts and simultaneous increase of the contents of Rb1, Rb2, Rc and Rd the extraction with liquid ammonia is obviously superior to the other extraction methods. Furtherm ore, ginsenosides from ginseng roots were extracted by alkaline methanol-water (60%) solutions. Alternatively, the extracts of the methanol-water (60%) extraction were treated with sodium hydroxide solution. Both methods convert also the malonyl-ginsenosides to neutral ginsenosides

Effect of Liquid Ammonia, Sodium Hydroxide/Liquid Ammonia, and Subsequent Cellulase Treatments on Mechanical Properties of Cotton Fabric

2000 ◽  
Vol 70 (2) ◽  
pp. 161-165 ◽  
Author(s):  
Tomiji Wakida ◽  
Takae Moriya ◽  
Muncheul Lee ◽  
Hiromu Yoshioka ◽  
Yuichi Yanai
Keyword(s):  
Mechanical Properties ◽  
Sodium Hydroxide ◽  
Cotton Fabric ◽  
Liquid Ammonia

Coupling Reaction of Allyl Sulfones Using Sodium Hydroxide in Liquid Ammonia

1987 ◽  
Vol 16 (10) ◽  
pp. 1939-1942 ◽  
Author(s):  
Yuji Takikawa ◽  
Kimiko Osanai ◽  
Satoshi Sasaki ◽  
Kazuaki Shimada
Keyword(s):  
Sodium Hydroxide ◽  
Liquid Ammonia ◽  
Coupling Reaction

Study on Electrochemistry Property of Ferric(III)-Oxalate-Gluconate Complex and its Dyeing Application

2013 ◽  
Vol 641-642 ◽  
pp. 508-512
Author(s):  
Dan Yu ◽  
Jie Yang ◽  
Chong Qian ◽  
Jia Jia Zhang ◽  
Wei Wang
Keyword(s):  
Cyclic Voltammetry ◽  
Sodium Hydroxide ◽  
Calcium Gluconate ◽  
Gold Electrode ◽  
Cotton Fabrics ◽  
Redox Process ◽  
Square Root ◽  
Optimal Conditions ◽  
Cyclic Response ◽  
Scanning Rate

The electrochemistry property of the ferric-oxalate-gluconate complex was investigated using a gold electrode as working electrode. The peak currents of the ferric-oxalate-gluconate complex were found to increase linearly with square root of scanning rate displaying a quasi-reversible cyclic response of the redox process. The optimal conditions could be drawn from the cyclic voltammetry results and K/S values. That is 8.00 g/L ferric sulfate, 10.08 g/L oxalate, 17.92 g/L calcium gluconate and 45.00 g/L sodium hydroxide. Under this condition, we can not only get high reducing strength in the electroanalysis process, but also have cotton fabrics with good dyeability.

Post-treatment of reactive dyed cotton fabrics by caustic mercerization and liquid ammonia treatment

Cellulose ◽  
2021 ◽  
Author(s):  
Yonghong Liang ◽  
Wenju Zhu ◽  
Cong Zhang ◽  
Rahul Navik ◽  
Xiao Ding ◽  
...  
Keyword(s):  
Liquid Ammonia ◽  
Cotton Fabrics ◽  
Post Treatment ◽  
Ammonia Treatment

Mechanical Properties of Cotton Yarns Mercerized in Liquid Ammonia and Sodium Hydroxide

1976 ◽  
Vol 46 (12) ◽  
pp. 872-879 ◽  
Author(s):  
M. L. Nelson ◽  
C. B. Hassenboehler ◽  
F. R. Andrews ◽  
A. R. Markezich
Keyword(s):  
Mechanical Properties ◽  
Sodium Hydroxide ◽  
Liquid Ammonia ◽  
Breaking Strength ◽  
Continuous Process ◽  
Elongation At Break ◽  
High Tension ◽  
Initial Modulus ◽  
Cotton Yarns ◽  
Length Changes

Yarns spun from high- and low-maturity cottons were mercerized in liquid ammonia in a continuous process, and in liquid ammonia and sodium hydroxide in skein form under various tensions. Both swelling agents produced similar changes in mechanical properties (breaking strength, tenacity, elongation-at-break, and initial modulus) under comparable conditions. Mercerization under high tension increased breaking strength and tenacity and decreased elongation-at-break. Slack mercerization in caustic resulted in elongations-at-break substantially higher than did ammonia treatment. A major difference between reagents was noted during treatment. When skeins were swollen slack and then restretched, much greater force was required to restretch ammonia-swollen skeins, and they could not be stretched as much as those that were caustic-swollen. Measurements of length changes in yarns during swelling, tensioning, and deswelling gave quantitative data to substantiate this observation. Differences in mechanism of swelling are discussed in relation to these findings.

Effect of Hot Water Processing on Dyeing and Mechanical Properties of Cottons Treated with Liquid Ammonia and Sodium Hydroxide

2000 ◽  
Vol 70 (9) ◽  
pp. 769-774 ◽  
Author(s):  
Tomiji Wakida ◽  
Yoshiho Kitamura ◽  
Muncheul Lee ◽  
Soyeung Bae ◽  
Meilan Chen ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Sodium Hydroxide ◽  
Liquid Ammonia ◽  
Hot Water
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