Coloration of Polyamide-6, 6 Fabric with Carbon Black Nano Particle for Camouflage Textiles of Simultaneous Spectrum Probe in Visible and Near Infrared

Research Article

Adv Res Text Eng. 2023; 8(2): 1083.

Coloration of Polyamide-6, 6 Fabric with Carbon Black Nano Particle for Camouflage Textiles of Simultaneous Spectrum Probe in Visible and Near Infrared

Anowar Hossain MD*

School of Fashion and Textiles, RMIT University, 25 Dawson Street, Brunswick, Melbourne, VIC 3056, Australia

*Corresponding author: MD Anowar Hossain School of Fashion and Textiles, RMIT University, 25 Dawson Street, Brunswick, Melbourne, VIC 3056, Australia. Email: [email protected]

Received: July 03, 2023 Accepted: July 28, 2023 Published: August 05, 2023

Abstract

Camouflage textiles on simultaneous spectrum probe in Visible-Near Infrared (Vis-NIR) have been explicated under optical mechanism of reflection and chromatic hue. Polyamide 6,6 (PA-6,6) fabric was experimented for liquid phase formulation and coloration in acidic medium of seven standardized PH (0-6) with Carbon Black Nano Particle (CBNP). International commission on illumination (CIE) color value (L*, a*, b*), Kubelka-Munk (K-M) reflection and reflection (%) of CBNP dyed PA-6,6 fabric was investigated with optical condition of specular reflectance, color measurement spectrophotometer from 400 nm to 700 nm. The K-M reflection and reflection (%) of CBNP dyed PA-6,6 fabric was also measured with optical property of diffuse reflectance, Fourier transform infrared spectroscopy from 1000 nm to 2500 nm. Vis-NIR reflection (%) was observed comparatively lower for PH 4 to 5. Similarly, K-M reflection of simultaneous spectrum probe in Vis-NIR was found higher for PH 4 to 5. Raw CBNP and CBNP modified PA-6,6 fabric was also examined for oxidation property, aggregation property, coloring property and air permeability by scanning electron microscopy. Hence, this experimentation was only focused on color properties of CBNP modified PA-6,6 fabric in terms of camouflage textiles.

Keywords: Camouflage textiles; Carbon black nano particle; Polyamide-6,6; Coloration; Visible-Near infrared spectrums

Abbreviations: CBNP: Carbon Black Nano Particle; CIE: International Commission on Illumination; FM: Formulation; K-M: Kubelka-Munk; MIR: Medium Infrared; nm: Nanometer; PA-6,6: Polymide 6,6; NIR: Near Infrared; SEM: Scanning Electron Microscopy; Vis: Visible; Tg: Glass Transition Temperature; KBr: Potassium Bromide; mL: Mililitre

Introduction

TThe current limitation of camouflage textiles relates to chromatic and/or reflection matching for simultaneous spectrum probe against multidimensional Combat Backgrounds (CBs). There is limited solution and optical approach of adaptive camouflage textiles against CBs. Carbon Black Nano Particle (CBNP) has low reflection effect of simultaneous spectrums in Visible-Near Infrared (Vis-NIR). The combination of CBNP with synthetic dyes will minimize the intensity for camouflage textiles in simultaneous spectrums of Vis-NIR [1-4]. CBNP can be formulated with brown, olive, green and khaki colorants for improvement of camouflage property. Low reflection patterning will improve the camouflaging effect against multidimensional CBs in general. In literature, laboratory stage camouflage assessment is very limited for camouflage applications, but it is necessary to signify the optical properties of camouflage object against multidimensional CBs [4-10].

Engineering of CBNP for Camouflage Coloration

Liquid phase dyeing is a common process for textile coloration but CBNP based technical Formulation (FM) and camouflage coloration is still a new approach in terms of water bath dyeing [11-17]. Nitric Acid (NA) modified CBNP has liquid phase oxidation property for enhancement of low reflection chromatic hue. CBNP reduces the reflection in Vis-NIR for simultaneous concealment against Vis-NIR surveillance [1,4,16,18-22]. Research is limited to achieve low reflection property of polyamide 6,6 (PA-6,6) fabric in Vis-NIR spectrums[23-25]. CBNP treated fabric reduces reflection than synthetic dyes such as vatdyes [26]. CBNP is a self-agglomerate material due to existing van der waals forces. Raw CBNP has hydrophobic property. Oxidation and dispersing agents generates hydrophilicity on CBNP surface [27]. CBNP has different properties in terms of particle size, surface structure, surface size, PH value and density. These properties of CBNP signifies the hydrophobicity, hydrophilicity and dispersibility for textile dyeing-coating-printing [5-8, 28]. Figure 1a shows the structure of CBNP.