Textile Fiber Analysis methods

IDENTIFICATION OF FIBER STRUCTURE By Aravin prince .P aravinprince@gmail.com INTRODUCTION  Fiber physics is the study of the structure and physical properties of the fibers  So fiber investigation methods and studying of fiber structure is very important to knowing about the fiber properties aravinprince@gmail.com METHOD OF INVESTIGATION OF FIBER STRUCTURE  Absorption of IR radiation  X- Diffraction studies  Optical microscopy  Electron microscopy  Thermal analysis  Density method  Nuclear magnetic resonance  Atomic force microscopy aravinprince@gmail.com X-RAY DIFFRACTION  X rays are electro magnetic waves. Range is between (1 to 2 Å i.e. 1*10 10 )  It is a independent method to determine the amount of crystalline matter present in a fiber  This idea is based on classical approach in which fibers are considered as a mixture of crystalline and amorphous matrix with each part producing a different type of X-Ray diffraction aravinprince@gmail.com  When X-Ray beam is incident on a crystalline material, diffraction give rise to sharp rings or peaks  Where as non crystalline material produce broad diffuse scattering  The diffraction efficiency of crystalline and non crystalline pattern are same aravinprince@gmail.com ELECTRON MICROSCOPE  Normal optical microscope we can find out up to 0.5Åresolution only ,  By using of electron microscope we can able to find out up to 5Å,  The rays from electron source are condensed on the specimen,  Here only dry sample can be examined,  Contrast in the image depends on the variation in scattering of the electrons by parts of the specimen of differing density. aravinprince@gmail.com  Electron microscope method is better to examining the surface of the fiber,  The main use of EM in fiber science has been in the range of medium to high magnification, which is near or beyond the limit of the microscope. aravinprince@gmail.com aravinprince@gmail.com INFRA RED  It is a composed by electro magnetic waves  Wave length between 1 to 15 µ  It is used to determine the chemical formula for the textile fiber  I.R is used to study about the crystalline and non crystalline part ( where as X Ray is only study about crystalline part)  Reflection of CH 3 is differ from CH 2 so I will help to find out the atom structure and its chemical structure aravinprince@gmail.com LINE DIAGRAM OF I.R SPECTROSCOPY aravinprince@gmail.com . IDENTIFICATION OF FIBER STRUCTURE By Aravin prince .P aravinprince@gmail.com INTRODUCTION  Fiber physics is the study of the structure and physical properties of the fibers  So fiber investigation methods. investigation methods and studying of fiber structure is very important to knowing about the fiber properties aravinprince@gmail.com METHOD OF INVESTIGATION OF FIBER STRUCTURE  Absorption of IR. method to determine the amount of crystalline matter present in a fiber  This idea is based on classical approach in which fibers are considered as a mixture of crystalline and amorphous matrix