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Outcome of Rot Retardant Treatment on the Mechanical Properties of Different Portion of Jute Fiber

Sweety Shahinur
Scientific Officer
Physics Department, Textile Physics Division, BJRI, Technology Wing, Manik Mia Avenue Dhaka1207

Dr. Mahabub Hasan
Associate Proffesor
MME, BUET, Dhaka-1000.

Dr. Qumrul Ahsan
Proffesor
UTeM, Malaysia.

Abstract/ Executive Summary:

Jute fiber is prone to fungal and microbial attack in humid condition leading to loss of strength and discoloration which maximizes biodegradability and environmental performance. To develop the rotting property, jute fiber were treated by CuSO₄_. In this research work, raw and treated jute fibers were characterized by mechanical and structural testing. The effects of treatments on the physical, chemical and mechanical properties of the fiber have been deliberated. Reaction parameters such as time and temperature have been investigated for all chemical treatments. Three different portions of jute fiber were treated by CuSO₄ to make rot retardant fiber. The physico- mechanical properties of the chemically treated jute fiber change according to the rot retardant chemical concentrations. In addition, the middle portion of the raw and treated jute fiber shows better mechanical as well as chemical bonding properties compared to the top and bottom portions. The SEM shows the fiber surface is converted into smoother with chemical concentration. Young’s modulus of top and bottom portions of raw jute fiber is declined by 40.60% and 33.96% compared to middle portion respectively. The tensile strength and strain to failure of middle portion show higher value compared to the top and bottom portion of the raw jute fiber. After chemical treatment the different portion shows similar tensile properties. Though the mechanical properties are decreased due to chemical treatment the treated fiber can be used for longevity product where the decreased properties have no effect.

Keywords: Mechanical properties, Biodegradability, Tensile properties, SEM

Location: BJRI and BUET , Dhaka

Start Date: 01-10-2008

End Date: 22-10-2012

Program Area: Resource Development and Management

Commodity: Jute

Objectives:

1. To observe the effect of rot retardant treatment on the natural jute fiber,

2. To study the physico-mechanical (Young's modulus, strain to failure, tensile strength)properties of the rot retardant jute fiber

Methodology:

The jute fibers were collected from the Bangladesh Jute Research Institute (BJRI), Faridpur regional station, Bangladesh. The supplied jute fiber was Corchorus capsularis L. The aspect ratio, Young’s modulus and tensile strength of the jute used were 75, (19-26) GPa and (200-400) MPa respectively. The whole jute fiber was cut into three different (top, middle and bottom) portions. For rot retardant treatment the three portions of jute fiber were treated by 4%, 8% and 20% copper sulfate (CuSO₄) at room temperature whereas Na₂CO₃ is used as catalyst. Cu content of rot retardant jute was measured by Iodometric method. Tensile testing was carried out using an Instron universal testing machine (Model no 3369) by varying gauge length (5 mm, 15 mm, 25 mm and 35 mm). The cross-head speed and load cell used were 5 mm/min and 5N respectively. Initially single treated and control jute fibers from top, middle and bottom portions were chosen randomly, which were cut down to a particular length. The diameter of single fiber was measured using a scanning electron microscope (SEM). The tensile strength was calculated using these following formulas.Young’s modulus was measured from the stress/strain curve. For each gauge length 15 samples were taken and there average values were showed in graphical form.

Source of Information: Bangladesh Journal of Physics 13, 59064, 2013

Article Link (Online Journal):

Funding Source:

1. Government

Budget: 65,000/- (Sixty Five Thousand Taka Only)

Total Budget (Tk.) : 65,000/- (Sixty Five Thousand Taka Only)

Achievement/Findings:

In case of raw jute fiber middle portion shows better mechanical properties than top and bottom portion, After rot retardant treatment the top and bottom portion tensile strength and strain to failure is increased as well as decrease in case of middle portion. After rot retardant treatment Young’s modulus of top, middle and bottom portion have become almost equal.

Knowledge Management: Journal