Alkali Treatment to Improve Physical, Mechanical and Chemical Properties of Lignocellulosic Natural Fibers for Use in Various Applications

2017 ◽  
pp. 47-63 ◽  
Author(s):  
Suvendu Manna ◽  
Prosenjit Saha ◽  
Sukanya Chowdhury ◽  
Sabu Thomas ◽  
Sabu Thomas
Keyword(s):  
Alkali Treatment ◽  
Natural Fibers ◽  
Chemical Properties ◽  
And Chemical Properties

scholarly journals Woolenization of Jute Fibre

2017 ◽  
Vol 13 (30) ◽  
pp. 314
Author(s):  
Rony Mia ◽  
Md. Ariful Islam ◽  
Bulbul Ahmed ◽  
Jalal Ibn Amin Mojumdar
Keyword(s):  
Market Share ◽  
Alkali Treatment ◽  
Chemical Properties ◽  
World Market ◽  
Modern Technology ◽  
Physical And Chemical Properties ◽  
Jute Fibre ◽  
Naoh Treatment ◽  
Physical And Chemical ◽  
And Chemical Properties

Once upon a time, Jute was called the golden fibre of Bangladesh. Due to some problems and growth of modern technology, the market share of jute has decreased. In this paper, the effect of Woolenization of jute fibre was described. It also shows how the physical and chemical properties of jute have been changed by alkali-treatment as well as its structure. It was demonstrated that this kind of treatment leads to several changes in its structure which has turned to a near wool structure. These works are done by different concentrations of different alkalis. Finally, 15% NaOH treatment of jute show maximum woolenized properties where we obtain softened and swollen jute. Conclusively, we have made some other products from woolenized jute fibres such that if introduced into our world market, it can increase the market share of jute fibre.

Morphology, Thermal and Chemical Properties of Nanocrystalline Cellulose (NCC) Hydrolyzed from Banana Stem

2016 ◽  
Vol 840 ◽  
pp. 257-261 ◽  
Author(s):  
Siti Norbaya Kasa ◽  
Mohd Firdaus Omar ◽  
Ismarul Nizam
Keyword(s):  
Acid Hydrolysis ◽  
Alkali Treatment ◽  
Chemical Properties ◽  
Nanocrystalline Cellulose ◽  
Gravimetric Analysis ◽  
X Ray Diffraction ◽  
Natural Cellulose ◽  
Ft Ir ◽  
Banana Stem ◽  
And Chemical Properties

Banana stem (BS) was used as the natural cellulose source. It must undergo an alkali treatment and bleaching process before continuing with an acid hydrolysis. Then, the Nanocrystalline cellulose (NCC) was synthesized via acid hydrolysis with four different concentrations of sulfuric acid (H2SO4) at 50 %, 52 %, 54 % and 56 % respectively at 50 0C for 1 hour. The influence of acid concentration of morphology, thermal and chemical properties of the NCC was studied in this project. The morphology dimension of the NCC was determined by using field emission scanning electron microscope (FESEM) and thermal stability of the NCC was determined by using thermal gravimetric analysis (TGA). Chemical composition and structural analysis were measured by using Fourier transform infrared (FT-IR) and X-ray diffraction (XRD).

Available Mechanical and Chemical Properties of Natural Fibers

2018 ◽  
pp. 110-136
Keyword(s):  
Mechanical Properties ◽  
Moisture Absorption ◽  
Natural Fiber ◽  
Low Cost ◽  
Natural Fibers ◽  
Chemical Properties ◽  
Low Energy ◽  
Synthetic Fibers ◽  
The Right ◽  
And Chemical Properties

Natural fibers are so attracting in comparison to synthetic fibers since they exhibit good properties like the low cost, good specific mechanical properties and their requirements of low energy during production. However, natural fibers hold some drawbacks which must be consider in comparison to the synthetic fibers like their high moisture absorption, low mechanical properties, heat resistance and durability and the variation in their prices and quality. In order to choose the suitable natural fiber for the selected application, their mechanical and chemical properties can be helpful for taking the right decision. In this chapter, a wide research is done in order to provide as much as possible the available mechanical and chemical properties of natural fibers of bast, leaf, seed, stalk, and wood categories from the most trusted publications. The specific mechanical properties of natural fibers are then calculated for a better comparison at the level of composites.

On Studying Surface and Nanomechanical Properties of Ti-O Films by Alkali Treatment

2011 ◽  
Vol 138-139 ◽  
pp. 821-825 ◽  
Author(s):  
Feng Wen ◽  
Yang Cao ◽  
Yu Zhou
Keyword(s):  
Contact Angle ◽  
Treatment Time ◽  
Alkali Treatment ◽  
Chemical Properties ◽  
Nanomechanical Properties ◽  
Angle Measurements ◽  
Contact Angle Measurements ◽  
Micro Arc Oxidation ◽  
The Times ◽  
And Chemical Properties

Titanium oxide (Ti-O) films have been widely used in the fields of electron, photology and medicine due to its distinctive optical, electrical and chemical properties. In this paper, Ti-O films were synthesized by micro-arc oxidation firstly, and then surface was modified by NaOH alkali solution under different treatment time. The wettabilities of as-prepared films were investigated by contact angle measurements using four common liquids. nanoindentation was adopted to obtain the films’ nanohardness and modulus. The results show that Ti-O films tend towards hydrophilia and its surface energy increased after alkali treatment, but no obvious effects to nanohardness and modulus of Ti-O films. Surface roughness of Ti-O films increases after alkali treatment firstly, but decreased with continuing to increasing the times of alkali treatment.

scholarly journals The Extraction of Fibre from Sisal Plant Leaf and Study of Comfortable Chemical Properties for Apparel Use

2020 ◽  
pp. 28-35
Author(s):  
Ethiraj J ◽  
Muktar Kassim ◽  
Erit Salahadin
Keyword(s):  
Alkali Treatment ◽  
Natural Fibers ◽  
Chemical Properties ◽  
Extraction Process ◽  
Sisal Fiber ◽  
Full Potential ◽  
Vacuum Oven ◽  
Visual Appearance ◽  
Physico Chemical ◽  
Two Stages

In vision of recent worldwide environmental issues, scientists have begun to show interest in developing the full potential of natural fibers and their assorted uses. Historically most of the methods used for the extraction of the sisal fiber inclusively the natural retting and mechanical process is not efficient in the removal of fibre compounds. In this study is related to how the impurities are removed from the fiber for apparel use. The alkali treatment, acidic treatment and treatment with varying solution of sodium salts is performed. The extractions of fibre have two stages, preliminary stage and laboratory stage. Primarily attaining maturity, sisal leaves was harvested manually by cutting from the leaf base with a sharp specialized crescent like knife having long handle. The harvested the fibres were systematically washed with distilled water and dried in a vacuum oven pre-set at 80ºC for 24 hours after which raw fibres were sampled. They were then treated with diethyl ether: petroleum ether: Ethanol (2:2:1), followed by ethanol. After the extraction process was completed, the length, diameter, moisture adsorption properties, physical shape, color, the visual appearance of fibre after treated with NaOH and some other physico-chemical properties of fibre will be evaluated.

Sign in / Sign up

Export Citation Format

Share Document