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Surface Modification of Jute and Jute Blended Yarns by Plasma Polymerization Using Organic Materials

Dr. Hasina Akther
Senior Sciectific Officer( C C)
Testing and standardization department, Textile Physics division, BJRI, Dhaka-1207

Dr. Md. Shahid Ullah ,
CSO
Textile Physics division, BJRI, Dhaka-1207

Prof. A.H. Bhuiyan
Professor
Department of Physics, Bangladesh University of Engineering and Technology (BUET), Dhaka-1000.

Abstract/ Executive Summary:

Plasma polymerized N, N, 3, 5 tetramethylaniline (PPTMA) thin films were deposited on to glass substrates at room temperature by a capacitively coupled parallel plate reactor. The structural, optical, and electrical properties of as deposited PPTMA thin films of different thicknesses were characterized by scanning electron microscopy, infrared (IR) spectroscopy, ultraviolet-visible (UV-Vis) spectroscopy, dc electrical properties. The structural analyses by IR spectroscopy reveal that PPTMA thin films are formed with certain amount of conjugation. Allowed direct transition and indirect transition energy gaps were determined from Tauc plots. The direct energy gap of as deposited PPTMA thin films is 2.8 eV. The current density-voltage characteristics of as deposited PPTMA have been investigated at different temperatures. It is observed that space charge limited conduction is operative in the higher voltage region.

Keywords: Jute, Plasma polymerization, Surface modification, organic compound

Location: Bangladesh Jute Research Institute, Bangladesh University of Engineering and Technology, BCSIR, Dhaka University

Start Date: 01-10-2008

End Date: 31-12-2011

Program Area: Resource Development and Management

Commodity: Jute

Objectives:

To prepare low cost and environment friendly jute and jute blended yarns with organic coating using plasma polymerization to improve wetting, provide protection against surface damage and facilitate handing in subsequent processing

Methodology:

The plasma-polymerization techniques are becoming one of the fastest growing areas in the field of direct thin films deposition of new kinds of polymeric materials, which are difficult to obtain by conventional polymerization methods. Plasma polymerized thin films are generally chemically inert, insoluble, mechanically tough and show stable chemical and physical characteristics. For polymer here we chosen polyaniline (derivatives of aniline), N,N,3,5 tetramethylaniline. Substrate: Glass slide; Sail Brand, China. Deposition Condition Initial Pressure : 0.01 mbar After injecting Pressure : 0.15 mbar Flow rate : 20cm3/min Power : 40W Duration : 20 minute to 60 minute At first for coating on yarn the characterization of the structure of deposited films on glass slide are necessary for investigation. So the Infrared Spectroscopy, UV-Vis Spectroscopy and Direct Current electrical properties are observed.

Source of Information: Annual Report 2010-2011, TRB, BJRI

Article Link (Online Journal):

Funding Source:

1. Government

Budget: only 1,45,000/- taka

Total Budget (Tk.) : only 1,45,000/- taka

Achievement/Findings:

Plasma polymerization technique was successfully used to prepare good and reproducible thin films of desired thickness from TMA on glass fibre. It increase the bond strength, chemically inert, insoluble, and show uniform, pinhole and fracture free. . The structural analyses by IR spectroscopy reveal that PPTMA thin films are formed with certain amount of conjugation. The direct energy gap of as deposited PPTMA thin films is 2.8 eV. The current density-voltage characteristics of as deposited PPTMA have been investigated at different temperatures. It is observed that space charge limited conduction is operative in the higher voltage region. From the experimental studies the carrier mobility, the free carrier density, and the total trap density of as deposited PPTMA are found to be about 1.3 x 10-13 m² V-1s-1, 2.0 x 1021 m³ and 4.0 x 1030 m³, respectively. This technology would be used for the textile end-use properties i.e. wettability, dye ability, printability, shrinking, pilling etc. which are the main causes of pollution.

Knowledge Management: Report/Proceedings