Surface modification of cotton fabric with dual‐responsive PNIPAAm/chitosan nano hydrogel

Abstract

The present study deals with preparing stimuli-responsive poly N-isopropyl acryl amide/chitosan (PNCS) nano hydrogel and looks into their effects as a surface modifying system of cotton fabric. The semi-batch surfactant-free emulsion polymerization method was proposed to reduce the size of particle and synthesis of PNCS nano particles. Fourier transform infrared, nuclear magnetic resonance, differential scanning calorimetry, scanning electron microscopy and dynamic light scattering methods confirmed the nano size of synthesized PNCS particles and sensitivity of these nano particles to the different temperature and pH, respectively. The water retention capacity (WRC) and carboxyl content of modified cotton with PNCS nano particles were assessed through the central composite design. The bounded PNCS nano particles to the surface of cotton fabrics made them responsive to these dual stimuli. The results demonstrated the dual effect of BTCA amount on WRC. Increase of the amount of BTCA itself led to the decrease of the WRC of modified cotton, but in the presence of PNCS, WRC was significantly increased.

Functionalized Textile Based Therapy for the Treatment of Atopic Dermatitis

“…Yang and colleagues further studied PNIPAAm-coated cotton fabric, which showed an extraordinary capability for collecting water from humid air [134]. The application of PNIPAAm combined with chitosan can make textiles with thermal/pH dual-responsive properties [140]. This dual-responsive function can also be achieved by incorporating pH-dependent monomer acrylic acid (AAc) into NIPAAm [141].…”

Stimuli-responsive Hydrogels for Textile Functionalisation: A Review

“…e latter include combinations of NiPAAm with chitosan [59,[72][73][74][75][76][77][78][79], ALA [80], MAA [81] or N-aminoethyl methacrylate (AEMA) [82]. Hydrogels have been synthesised using various techniques such as surfactant-free dispersion copolymerisation with a conventional stirring technique [59,[72][73][74][75][76][77], mixing with the help of an ultrasound bath [78][79]83], copolymer synthesis [82], coupling of a triblock copolymer [61], surface-initiated atom transfer radical polymerisation (ATRP) [26], free radical polymerisation [81] and precipitation polymerisation [76]. In most cases, surfactant-free dispersion polymerisation is used to synthesise both microgels and nanogels.…”

“…Potassium persulfate (KPS), which produces sulphate radicals through thermal decomposition, can be used instead of APS [78,86], resulting in the negative surface charge of microgel particles caused by the presence of sulphate groups [87]. e use of catalysts such as N'-tetramethylethylenediamine (TEMED) can be seen in poly-NiPAAm/chitosan nanogel synthesis [79] to accelerate the formation of free radicals.…”

“…KPS was added to initiate polymerisation [80]. e presence of chitosan in the synthesis of a poly-NIPAAm-based hydrogel stabilised nanogel particles [79] and acted as a surfactant, preventing particle coagulation [59]. An increase in the chitosan-to-poly-NiPAAm ratio decreased the size of synthesised particles of the nanogel [89].…”

“…e nanogel swelled at lower pH values and temperatures and shrank at higher temperatures and pH values. e addition of BTCA reduced the swelling ability slightly [79]. A non-woven textile was coated with a nanogel based on poly-NIPAAm and methacrylic acid (MAA) incorporating silver nanoparticles into its structure [81] to achieve antimicrobial properties.…”