The Research For Functional Textiles Materials With Detection Of Hydrogen Sulfide

Functional textiles refer to the textiles that have a particular function or application properties,in addition to the physical and mechanical properties of general textiles.Traditional textiles,divided into clothing textiles,industrial textiles and decorative textiles,having short usage ranges.Introduce functional nanomaterials into textiles,the use of special properties of nano-materials to make up for the defects of traditional textiles at the same time,so that the textile with special performance.Hydrogen sulfide gas has a rotten egg odor at very low level of concentrations.Currently,the detection of hydrogen sulfide apparatus is big and immobile,which needs for professional operation and analyst.The research into a portable hydrogen sulfide functional textiles,on the one hand,can be used in medical,industrial,life and other conventional applications;on the other hand,solve the portability of equipment detection of hydrogen sulfide.In this paper,based on silver-modified sulfonic silica gel(Ag-SSA)as the basal functional material,and the functional textile was prepared by dyeing and finishing technology and electrospinning.The main contents were as follows:(1)In this paper,silica gel was modified with chlorosulfonic acid to prepare SSA.SSA was modified with silver nitrate.Ag-SSA was prepared and characterized by SEM,XRD and ICP.The results showed that the sulfonic acid groups appeared on the surface of silica gel,and the silver ions were successfully grafted onto SSA.The content of Ag in Ag-SSA was 52.40 mg/g.Ag-SSA can be used as a color change of sulfur ions in the presence of Ag-SSA under different p H conditions.Ag-SSA can be used as a raw material for the detection of toxic gases such as hydrogen sulfide,providing a new idea for the development of gas-sensitive dyes.(2)Ag-SSA/cotton fabric was prepared by ultrasonic processing method,realizing the function of the natural textile detecting hydrogen sulfide.Ag-SSA/cotton fabric relative to the best use of fabric 50%,such this case,the loading rate of Ag-SSA is 7.58%.The figure of Scanning electron microscopy showed that Ag-SSA particles were attached to Ag-SSA/cotton fabric,and Ag-SSA particles were attached after washing,so the finishing technology was well stabilized.From the data of Datacolor 650,the cotton fabric after Ag-SSA finishing,detection of different gradient concentration of hydrogen sulfide,cotton fabric discoloration K/S range of 0.5-6.7,hydrogen sulfide minimum detection theoretical content is 320 ?g/Kg.Meanwhile,the function of detecting hydrogen sulfide has transferred to cotton successfully,which provides a reference method for the portable detection of hydrogen sulfide and other harmful gases.The mechanical properties of the cotton fabric after the Ag-SSA finishing doesn't change significantly compared with the cotton fabric.The Ag-SSA/cotton fabrics have a good performance,such as the mechanical properties,antibacterial properties,therefore,the Ag-SSA/cotton fabrics have the function of detecting hydrogen sulfide with portability and wearability;SSA/cotton fabric's weight loss is higher than Ag-SSA/cotton fabric,indicating that silver ions blocked sulfonate ions and improved the thermal stability of cotton fabrics.(3)The electrospinning technology of Ag-SSA and PVA blending was studied.The PVA/Ag-SSA blended nanofibers membrane was successfully prepared by electrospinning.The morphology of the obtained nanofibers were characterized by a series of characterization methods.The optimum dosage of PVA was 9%,and the ratio of PVA to Ag-SSA blended spinning solution was discussed,the blending ratio parameters were 9% PVA with 7% Ag-SSA.(4)From the morphology observed by SEM,the addition of Ag-SSA did not adversely affect the morphology of PVA fibers,and Ag-SSA was well dispersed in PVA fibers,which provides some guarantee for the stability of hydrogen sulfide gas.From FTIR and XRD characterization,it can be confirmed that the white material dispersed in PVA fibers in Ag image is Ag-SSA.The peaks of Ag-SSA characteristic groups appeared in the FTIR spectroscopy,and the diffraction peaks of silver ions were also observed in the XRD pattern.The results of FESEM energy spectrum analysis showed that the PVA/Ag-SSA electrospinning fiber contained elements of C,O,S,Ag and Si,and further confirmed the successful blending.The PVA/Ag-SSA electrospun fibers were tested by Datacolor 650 to detect the color change before and after treated with different concentrations of hydrogen sulfide gas,indicating that PVA/Ag-SSA electrospun fibers were able to detect the minimum content of 10 ppm(v/v)Hydrogen gas,naked eyes can observe hydrogen sulfide detection limit of 50 ppm.PVA/Ag-SSA electrospun fibers detected the other components of human exhaled gas and found that the discoloration was not as sensitive as hydrogen sulfide gas,indicating that the prepared PVA/Ag-SSA electrospun fibers had some stability in the detection of hydrogen sulfide gas.