Study on garment fabric longevity cotton fiber structure, properties and based on dyeing
|School||Wuhan Textile University|
|Course||Textile Science and Engineering|
|Keywords||Changsheng cotton thermal degradation indigo sodium hydrosulfite thioureadioxide|
There are many superior properties of Changsheng cotton,but few scholars have st-udied its nature and applications systematically.This paper included three contents:basic properties,thermal stability and dyeing using indigo of Changs-heng cotton fiber.Firstly,observed its horizontal and lengthwise microstructure by SEM method; anal-yzed its composition by FT-IR and chemical method;usd XRD method to get its degre-e of crystallinity;measured its length,fineness,intensity and Micronaire scale;and compa-red the difference of these properties between Changsheng cotton and medium staple c-otton.Thermal degradation behavior and kinetics of Changsheng cotton fiber were invest-igated by thermogravimetric analysis (TG) and differential thermogravimetric analysis (DTG) at different heating rates under highly purity N2.The thermal degradation kinetic-parameters were determined using Flynn-Wall-Ozawa and Coast-Redfern methods,which established its kinetic equation (S9,n=1/3,f(a)=3(1-a)3/2(0.20≤a≤0.8)) and isothermal kinetic model (d a/d t=9.90X109×e-18410/RT(1-a)3/2(0.20≤a≤0.80)) of the major de-gradation process through selecting different thermal degradation mechanisms.The model obtained could describe the decomposition behaviour of Changsheng cotton fiber.The studies on dyeing of Changsheng cotton using indigo consists:using sodium hydrosulfite and thiourea dioxide as reducing agents,indigo dye concentration lg/L,inv-estigated different factors to influnce the potential and dyeing properties(K/S and rate of dye-uptake), such as concentration of reducing agent, sodium hydroxide and reducin g temperature and so on.Then compared the reducing nature of two reducing agent.An d obtained the optimum technique:sodium hydrosulfite2.Og/L,sodium hydroxide10g/L,d-yeing time8min;thiourea dioxide1.5g/L,sodium hydroxide15g/L,dyeing time6min.