Jin Qiang Liu

Non-Aqueous Dyeing of Reactive Dyes in D5

C.I. Reactive Red 195 was used for non-aqueous dyeing in D5 (Decamethyl Cyclopentasiloxane) and appropriate surfactants were selected to ensure the dyes dispersed stably in D5 medium. The feasible method for reactive dyeing in dyes/D5 suspension system was established through repeated experiments. At the same time, taking the color depth (K/S value) as the evaluation index, the process factors in dyeing such as temperature, dyeing duration, pick-up ratio of alkali solution on fabric, as well as the alkali concentration were optimized for setting up dyeing conditions. The results showed that, the dye up-take could reach nearly 100% without any salt as accelerating agent. Since just a little water was used in the process, hydrolysis of reactive dyes was restrained, fixing rate was increased, and the apparent color depth of the dyed sample was much better than traditional water bath dyeing. The washing fastness and rubbing fastness of samples dyed in dyes/D5 system were satisfactory.

Study on the Dyeing of PET Fiber with Disperse Dyes in D5 Media

This experiment selected a new kind of environmental media (D5) instead of using water on the dyeing of PET, this work provided a new method for non-aqueous dyeing. The effects of the water addition, temperature, dyeing time and reagents on adsorption amount of disperse dye were studied, one good dyeing process is, adding 0.5mL water and 0.3mL ethanol into 20mL D5 system, the temperature of dyeing was 130°C, the preservation time of dyeing was 60min.

The Impact of Liquid Surface Tension on Fabric Drying Efficiency

This study presents an experimental investigation of the relationship between liquid surface tension and fabrics water retention in dehydration processes such as centrifuging, line drying and heat drying. Selected surfactants were used to prepare wash baths with different surface tension, and dehydrating experiments of cotton fabric after immersion in above bath were conducted. The results showed that lower surface tension is beneficial to reducing fabrics water retention by centrifuging and improving line drying efficiency and heat drying efficiency. It was assumed that water with low surface tension is easy to drop down or separate from fabric, thus improving the de-watering and drying efficiency.

Antifelting-Coating for Wool from PPD-[Si(OH)3]2 Agent via a Sol-Gel Process

A sol type anti-felting agent containing PPD-[Si(OH)3]2 synthesized and applied to the wool with pad-dry-cure process. The structure of the prepolymer was characterized by FT-IR spectroscopy and the film transparency and the fiber microstructure were proved though UV-vis analysis and WAXD. The results indicated that the coating could endow a better anti-felting effect with low curing temperature at 120°C and 3 min, the area shrinking rate from13.44% of the original fabric decrease to 2.86% of the treated samples without strength decreased and handle changed stiff seriously, which accord with the IWS Test Method 31 standard.

Study of PVA on Polyester Desizing with Atmospheric Pressure Dielectric Barrier Discharge Plasma

The effect of atmospheric pressure dielectric barrier discharge plasma treatment on desizing polyvinyl alcohol (PVA) on polyester fabric was discussed as compared desizing with alkali through a combination of desizing rate, field scanning electron microscopy and strength test. The dyeing properties of polyester fabrics treated with atmospheric plasma have also been studied. The results show that plasma treatment can improve desizing rate, surface color depth and dye-uptake for polyester fabric.

The Preparation of Waterborne Sodium Bisulfite - Blocked Polyurethane Curing Agent

waterborne sodium bisulfite－blocked polyurethane was using polyether diols(N210), isophorone diisocyanate (IPDI) as the main material, sodium bisulfite as blocking agent, ethanol as the cosolvent. The effect of temperature and time of blocking reaction, alcohol than water were carefully studied. The best process parameter of blocking reaction: the temperature was 20°C; the reaction time was 45min; n(NaHSO3):n(NCO)=1.1; alcohol than water=1.85; the deblocking temperature determined by DSC was about 76～130°C

A Study on Ultrasonic Technology in Silk Degumming

During the transmission of ultrasound, its great directionality, ubiquitous penetration and the ability to strengthen the diffusion, exchange and transfer of matter can help the treating fluid reach the crossing points of silk fabric. And the function of ultrasonic wave can make use of acoustic cavitation effect to produce impact on sericin layer at the crossing point, thus promoting the fragmentation and separation of sericin, improving the removal efficiency of sericin at crossing points and achieving uniform silk fiber degumming. The function of ultrasonic wave can cut down the time of process and avoid the damage of fibroin through controlling the temperature and dose of chemical agent.

Super Anti-UV Bombyx Silk Fabric Preparation Based on Sol Coating

An anti-UV complex coating based on Ti sol for bombyx silk fabric was prepared. The process included using sols prepared by tetrabutyl titanate hydrolysis. The coating for the samples was prepared using the sol-gel method. Data from WAXD and TGA indicated that the properties of treated fabric showed little change when sol was introduced. SEM analysis was carried out to study the morphology of the fibers. Compared with the original sample, the UPF value of the treated sample increased from 31.99 to 213.09 with a high anti-UV performance.

Preparation of PNIPAAm Grafted Cotton via O2 Plasma and its Thermal Sensitivity

A temperature-sensitive N-isopropylacrylamide (NIPAAm) grafted cotton fabric was prepared by the plasma-induced graft polymerization technique. The surface morphology of the grafted fabric was observed from field scanning electron microscopy (FSEM). Fourier transform infrared spectroscopy (FTIR) and DSC were used to characterize the structure and thermal property of the grafted fabric. The results showed that the PNIPAAm was grafted onto cotton fabrics. The DSC analysis results indicated that LCST value of the grafted fabric was around 32 °C. The water permeation flux of the grafted fabric varied dramatically with a slight change at temperature around the LCST, which showed that the grafted PNIPAAm could act effectively as a chemical valve to control the on-off behavior of cotton fabrics.

The Preparation of Core-Shell Type Acrylic-Polyurethane Composite Emulsions for Pigment Printing

Vinyl-endblocked polyurethanes were prepared from polyether diols(N210), isophorone diisocyanate (IPDI), dimethylol propionic acid (DMPA) and 2-hydroxyethyl acrylate (HEA). The core-shell structure acrylic-polyurethane composite emulsion was prepared by seeded emulsion polymerization of methyl methacrylate (MMA) and butyl acrylate (BA) using the polyurethanes emulsions as seeded emulsions. The core and shell regions were occupied by acrylic polymer and polyurethane, respectively. Because polyurethanes were vinyl-endblocked, acrylic monomers could graft partially to them. The formation of core-shell structure was observed by transmission electron microscopy (TEM). The structure and properties of dried film were studied by Fourier-transform infrared spectroscopy (FT-IR) and TGA.