Erasmus+ 1 | Página 67

Phases

1.Dividing the students into groups

2.Activity introduction

3.Group work

4.Product presentation

Objective:

Identify different textile fibres based on their chemical reaction

Test duration:

4 h

Materials:

•squeeze bottle

•water

•H2SO4

•Different fibres: wool, silk, cotton, synthetics

•Schweitzer’s reagent

•HNO3

•NaOH 10%

•Bunsen

CONCLUSIONS:

It is possible to identify different kinds of fibres based on their reactions with heat, acids and other substances. Each reaction is based on the fibre chemical composition.

Microscopic Analysis of Textile Fibres - workshop II