Terahertz Spectroscopy for Moisture and Fibre Analysis
topic
Terahertz time-domain spectroscopy provides non-contact measurement of textile moisture content, polymer crystallinity, and fibre blend composition through the characteristic THz absorption spectra of water and polymer molecular structures, with THz imaging enabling spatial mapping of moisture distribution in drying textiles and chemical concentration distribution in coated fabrics at penetration depths through several millimetres of fabric thickness.
Role
Provides non-contact measurement capabilities for moisture and chemical distribution that NIR and microwave moisture sensors cannot match in spatial resolution and chemical specificity, with THz spectroscopy emerging as a textile quality measurement tool for the inline characterisation of fibre blend ratios, moisture non-uniformity in drying processes, and coating thickness distribution in applications requiring the chemical specificity and spatial resolution that alternative measurement technologies cannot provide.