| Cotton fabric is soft and breathable,comfortable to wear,with good moisture absorption,warmth is an important textile material in daily life and industrial production.However,due to the hydrophilic and polar nature of cotton fiber itself,it is easy to cause the proliferation of microorganisms in the process of use and difficult to clean after the fabric is contaminated,which limits its development in the fields of clothing,medical and health.In order to improve the applicability of cotton fabrics.we improve the nanostructure and chemical properties of the fabric surface by means of green and environmental protection,and carry out the basic research on the mechanism of fabric modification,which is conducive to realizing the application of the fabric in industrial production and daily life.This paper aims to produce superhydrophobic surfaces in a simple and fast way based on micro and nano multi-scale particles with controllable roughness structure,modified by low temperature plasma at atmospheric pressure to achieve both surface roughness and structural stability of the fabric.The research is to discharge cotton fabric by atmospheric pressure low temperature plasma jet technology,and then the fluorine-free water repellent is finished on the cotton fabric by dipping-rolling-drying method.The contact angle(CA)of fabric surface with different concentrations of water repellent finishing was measured,The results showed that the water contact Angle increased to 153°at 160g/L,and the superhydrophobic effect was achieved and the dosage of the water repellent agent is reduced by 27.3%.The atomic force microscopy(AFM)showed that the roughness of the finished fabric increased to 13.3 nm compared with the untreated fabric,and the scanning electron microscopy(SEM)showed that the surface of the plasma-treated fabric showed obvious etching and a dense hydrophobic film was formed on the surface of the fabric after water repellent finishing.X-ray photoelectron spectroscopy(XPS)showed that Si2s and Si2p peaks appeared at the 150e V and 100e V binding energies of the treated fabrics.Compared with the untreated fabrics,the content of C element in the water-repellant and plasm-treated fabrics increased from 61.63%to 85.40%and 86.36%respectively.The content of O element decreased from 38.37%to 9.85%and 9.20%respectively.The N and Si element contents increased after finishing.It was found that the C-C/C-H content on the fabric increased after water-repellent finishing,but the content of C-O,C=O/O-C-O,decreased relatively,and C-N and C-Si bonds appeared,which changed the hydrophobicity of the fabric surface.Fourier Transform Infrared Spectrometer(FTIR)observation showed the appearance of C=O stretching vibration peak at 1740 cm-1,CH2telescopic vibration peak appeared at 2850cm-1.The hydrophobic modified fabric has good antifouling effect on common household liquids.In addition,the fabric were tested for their taking properties,and it was found that the plasma-modified fabric with water-repellent finishing hardly affected the breathability,moisture permeability and tensile properties of the cotton fabric.And after 25 washes,the CA of the prepared superhydrophobic cotton fabric decreased to144°and the fabric still had hydrophobic properties within an acceptable range.Finally,the design study of plasma water-repellent finishing in industrial production was carried out,considering the factory production scale,plant form,general layout,etc.,and the feasibility of plasma water-repellent finishing in industrial production was proposed by optimizing the industrial production process and designing the product scheme. |
PDF Full Text Request