scholarly journals Preparation of Paper Mulberry Fibers and Possibility of Cotton/Paper Mulberry Yarns Production

2016 ◽  
Vol 2016 ◽  
pp. 1-6
Author(s):  
Manoon Jitjaicham ◽  
Boonsri Kusuktham
Keyword(s):  
Hydrogen Peroxide ◽  
Optimum Condition ◽  
Nonionic Surfactant ◽  
Sodium Hydroxide ◽  
Cotton Fibers ◽  
Antifungal Property ◽  
Bleaching Process ◽  
Inner Bark ◽  
Yarn Production

The novelty of yarn production from cotton/paper mulberry fiber blends was reported. The objective of this research was to prepare the paper mulberry fibers and study the possibility of production of yarns from cotton/paper mulberry fibers. For preparation of paper mulberry fibers, the inner bark was first immersed in water for 24 h. Then, the fibers were treated with sodium hydroxide at concentration of 5–10% (w/v) for 1–3 h. After that, the bleaching process was conducted with hydrogen peroxide at concentration of 5–25% (v/v) for different temperature and time. Finally, the fibers were washed with 10% (v/v) of nonionic surfactant at temperature of 90°C for 30 minute to remove the residual gum from the fibers. The results showed that optimum condition for scouring of the paper mulberry fibers was 15% (w/v) sodium hydroxide at 90°C for 2 h. The bleaching process with 15% (v/v) H2O2 at 90°C for 90 minute was suitable. The obtained fibers were blended with the cotton fibers to produce yarns by open-end spinning method. The % elongation and tenacity of the blended yarns increased with the increasing of the paper mulberry ratio. Also, the antifungal property of yarns was improved by the blending of cotton fibers with the paper mulberry fibers.

scholarly journals An Eco-Friendly Approach Towards Bleaching Process for Whitening of Kydia calycina Fibres Instead of Hydrogen Peroxide

2016 ◽  
Vol 11 (3) ◽  
pp. 883-891
Author(s):  
Tayyaba Fatma ◽  
Shahnaz Jahan
Keyword(s):  
Hydrogen Peroxide ◽  
Weight Loss ◽  
Sodium Hydroxide ◽  
Fibre Length ◽  
Sodium Perborate ◽  
Bleaching Process ◽  
Whiteness Index ◽  
Pectinase Enzyme

This study was conducted to sustain the eco-friendly approach for bleaching of Kydia calycina fibres. The Kydia calycina fibres were extracted from the young shoots of Kydia calycina plant through water retting and then the extracted fibres were scoured with pectinase enzyme. After that, the scoured Kydia calycina fibres were bleached with three different methods. Among them, the best bleaching method was selected on the basis of tenacity, elongation, fineness, fibre length, weight loss and whiteness index. The concentration of sodium perborate, concentration of TAED, time and temperature of selected bleaching method were optimised using SAS software. At optimisation stage, tenacity, elongation, fineness and whiteness index of bleached fibres were tested. The results indicated that TAED activated sodium perborate showed better tenacity (3.81 g/d), elongation (2.09 %), fineness (22.92 denier) and maximum whiteness index (68.67) at optimised variables including concentration of sodium hydroxide (5 g/l), concentration of TAED (3 g/l), time (60 min) and temperature (500 C).

Bleaching optimization at WestRock mill in Covington, Virginia

TAPPI Journal ◽  
2016 ◽  
Vol 15 (9) ◽  
pp. 581-586 ◽  
Author(s):  
RICARDO B. SANTOS ◽  
PETER W. HART ◽  
DOUGLAS C. PRYKE ◽  
JOHN VANDERHEIDE
Keyword(s):  
Hydrogen Peroxide ◽  
Sodium Hydroxide ◽  
Chlorine Dioxide ◽  
Capital Expenditures ◽  
Equipment Repair ◽  
Optimization Program ◽  
Hardwood Pulp ◽  
Improved Performance

The WestRock mill in Covington, VA, USA, initiated a long term diagnostic and optimization program for all three of its bleaching lines. Benchmarking studies were used to help identify optimization opportunities. Capital expenditures for mixing improvement, filtrate changes, equipment repair, other equipment changes, and species changes were outside the scope of this work. This focus of this paper is the B line, producing southern hardwood pulp in a D(EP)DD sequence at 88% GE brightness. The benchmarking study and optimization work identified the following opportunities for improved performance: nonoptimal addition of caustic and hydrogen peroxide to the (EP) stage, carryover of D0 filtrate to the (EP) stage, and carryover of (EP) filtrate to the D1 stage. As a result of actions the mill undertook to address these opportunities, D0 kappa factor decreased about 5%, sodium hydroxide consumption in the (EP) stage decreased about 35%, chlorine dioxide consumption in the D1 stage decreased about 25%, and overall bleaching cost decreased about 15%.

Production of monosaccharides from poplar by a two-step hydrogen peroxide-acetic acid and sodium hydroxide pretreatment

2021 ◽  
Vol 170 ◽  
pp. 113820
Author(s):  
Hong Liao ◽  
Jiaxin You ◽  
Peiyao Wen ◽  
Wenjun Ying ◽  
Qianqian Yang ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Acetic Acid ◽  
Sodium Hydroxide

scholarly journals Bleaching Process Investigation of Tunisian Dromedary Hair

ISRN Textiles ◽  
2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
T. Harizi ◽  
S. Dhouib ◽  
S. Msahli ◽  
F. Sakli
Keyword(s):  
Mechanical Properties ◽  
Hydrogen Peroxide ◽  
Adverse Effects ◽  
Oxalic Acid ◽  
Review Of The Literature ◽  
Bleaching Process ◽  
Bleaching Efficiency

Successful bleaching of pigmented fibres was, generally, evaluated by a maximum whiteness, a minimum yellowness, and less damage to the bleached fibers. A review of the literature reveals that many studies on pigmented fibre bleaching are concerned with improving the whiteness and mechanical properties of bleached fibres. In this study, we investigate the effects of the hydrogen peroxide concentration, bleaching time, and clarification bath on the bleaching efficiency of Tunisian dromedary hair. It was showed that 30 min bleaching time gives better result in term of whiteness. However, an increased bleaching time gives an excessive damage to the bleached fibers. Further, the damage incurred by the dromedary hair was more important than that for wool, as is shown by the tenacity results. We found that oxalic acid, which is used for rinsing dromedary hair (after bleaching), provides improved results in term of whiteness obtained with bleaching. Certainly, oxalic acid made it possible to remove the maximum of iron remaining on fibre after bleaching. Bleaching methods demonstrate the excessive damage incurred by the fibre when using hydrogen peroxide particularly with raise concentration. This damage leads to adverse effects on the tenacity fibre.

scholarly journals The Study Of Conversion Cpo To Polyol (Polyalcohol)

REAKTOR ◽  
2017 ◽  
Vol 11 (1) ◽  
pp. 8
Author(s):  
F. S. Budi ◽  
Z. Abidin
Keyword(s):  
Hydrogen Peroxide ◽  
Fatty Acid ◽  
Optimum Condition ◽  
Formic Acid ◽  
The Other ◽  
Hydroxyl Number ◽  
Main Component

Indonesia is the second big CPO producer after Malaysia. The CPO production of Indonesia gradually increases and reaches 8.2 million tones. About two third of it is used to meet the domestic will receive little income. Therefore, it must be converted into the other product, which has the high value. The main component of it is glyceride composed of glycerol  and fatty acid. The glyceride can be converted into polyol (polyalcohol) which is the material in manufacturing polyurethane, cosmetic, lubricant etc. the process of converting of CPO into polyol is called  the hydroxylation. This research aim to study the hydroxylation process of CPO into polyol and to optimize the variable which really affect the hydroxyl number of product. Based on the experiment, the optimum condition of hydroxylation of CPO with the hydrogen peroxide (H2O2) and the formic acid (HCOOH) into polyol is got as follows: temperature 50 0C, composition of reactan 40% and time 2 hours. The polyol produced has the hydroxyl number 148.Keywords : CPO, hydroxylation, polyol

The use of hydrogen peroxide and sky stabilizer agent in bleaching process of textile fabrics

2019 ◽  
Author(s):  
Ab Dulmalik Khaliq ◽  
Achmad Chafidz ◽  
Faisal Rasjid Maddun ◽  
Hafizh Rafi Herimawan ◽  
Ghalib Muhammad Yusuf ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Bleaching Process ◽  
Textile Fabrics

The effect of sodium hydroxide on crystallite orientation measurements in cotton fibers

1973 ◽  
Vol 17 (2) ◽  
pp. 585-587 ◽  
Author(s):  
Jacques J. Hebert ◽  
Linda L. Muller ◽  
Richard J. Schmidt ◽  
Mary L. Rollins
Keyword(s):  
Sodium Hydroxide ◽  
Cotton Fibers ◽  
Crystallite Orientation

Synthetic Technology and Performance of a Novel Fatty Alcohol Polyoxyethylene Carboxylate Surfactants

2011 ◽  
Vol 298 ◽  
pp. 163-168 ◽  
Author(s):  
Yuan Yuan Lei ◽  
Guo Zheng ◽  
Yu Sun ◽  
Yong Zhou
Keyword(s):  
Reaction Time ◽  
Optimum Condition ◽  
Sodium Hydroxide ◽  
Fatty Alcohol ◽  
Succinic Anhydride ◽  
Foam Stability ◽  
Raw Materials ◽  
Molar Ratio ◽  
New Type ◽  
And Performance

In this paper, with fatty alcohol polyoxyethylene (AEO9), succinic anhydride (SA) and sodium hydroxide as raw materials, a new type of fatty alcohol polyoxyethylene carboxylate surfactants (SAE9C-Na) was obtained by esterification and neutralizing effect. The influencing factors were researched and its surface properties were studied. The optimum condition of synthesis was determined: molar ratio of alcohol to acid was 1:1.1, reaction temperature was 85°C, reaction time was 60 min, under this condition, the yield could reach up to 95.8%. The results received from this experiment showed that SAE9C-Na had excellent surface activity and foaming and foam stability, whose emulsification and solubility enhancement were improved greatly.

Studies of Chemically Modified Cotton

1969 ◽  
Vol 39 (1) ◽  
pp. 15-23 ◽  
Author(s):  
S. N. Pandey ◽  
R. L. N. Iyengar
Keyword(s):  
Sodium Hydroxide ◽  
Potassium Hydroxide ◽  
Marked Effect ◽  
Chemical Reactivity ◽  
Degree Of Polymerization ◽  
Cotton Fibers ◽  
Cellulose Crystallinity ◽  
Moisture Regain ◽  
Chemically Modified ◽  
Degree Of Swelling

High crystallinity of cellulose is the cause of undue stiffness and brittleness as well as low absorptioh and chemical reactivity. With a view to overcome these drawbacks and bring about changes in the elastic and other properties of cotton fibers, two cottons, Gaorani and 170-Co.2, were treated with anhydrous ethylamine, diethylamine, pyridine, and aqueous solutions of sodium hydroxide (30%) and potassium hydroxide (40%) for 15 min to 50 hr. Modified lint samples showed interesting changes in cellulose crystallinity and moisture regain, on treatment with ethylamine, sodium hydroxide, and potassium hydroxide after certain periods. Some of the treatments also showed a marked effect on the degree of polymerization and the tensile, mechanical, swelling, and optical properties of the fiber. Moisture regain and degree of swelling were found to be higher in the case of samples treated with alkali, compared with those treated with amines.

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