Effect Of Plasma Treatment And Organic Rare Earth Mordant Dyeing Properties Of Kapok Fiber

Kapok fiber is a kind of small varieties of cellulose fiber, in the field of clothing has not yet developed, its characteristic is kapok fiber hollow degree reached 87%, is a good heat insulation heat preservation material, and has the effect of natural antibacterial except mites, has the very good development prospects, has become the potential high-end clothing. But as a result of kapok fiber dyeing performance and spinnability is poor, limiting its development in the field of clothing. Especially for the root cause of the kapok fiber dyeing performance is poor, there is no other people done any research in this area.Plasma is a kind of environmental protection, high new surface modification technology, its characteristic is to use physical modification methods to achieve the effect of chemical modification method. Plasma in high speed motion of charged ion bombardment to the fiber surface, on the fiber surface etching, crosslinking, crystallization and a series of reactions, with little damage to the material, pollution of small advantages. Hyperbranched polymer is a kind of highly three-dimensional three-dimensional structure of the flower of macromolecular polymers, soluble in water and has low viscosity, high solubility, simple synthesis method etc. Rare earth by complexation, is accelerating role for fiber dyeing. By complexation rare earth is accelerating role for fiber dyeing. This paper combines three techniques to find out a kind of process, and apply it to the kapok fiber dyeing, improve the dyeing performance of kapok fiber, and explore what is the root cause of kapok fiber dyeing performance is poor.At first, this paper the author explores the kapok fiber pretreatment and find out the kapok fiber pretreatment optimum process, the lignin removal effect is best, and then use the plasma in different gas environment, and different plate spacing, under different processing time, processing, the processing of kapok fiber before and after the comparison. The results showed that after dealing with the plasma of kapok fiber surface etching the surface become rough, capillary effect, the dynamic contact Angle smaller, improve the wettability of the fiber; Tensile strength of fiber did not happen obvious drop, plasma treatment does not affect fiber breaking strength; By XPS analysis shows that on the surface of the untreated kapok fiber hydrophilic group number is too little, most of them are C-C, and C-O very few, hindered the affinity of dyes and fibers, and kapok fiber after the plasma treatment on the surface of C-C key to reduce, increase C-O key, fiber obviously increase the number of hydrophilic groups and kapok fiber hydrophilic was improved; Dynamics of before and after the plasma treatment of kapok fiber dyeing thermodynamics study found that plasma treatment can improve the dyeing rate in the early of kapok fiber line, reduce the half dyeing time, but of kapok fiber adsorption thermodynamics model does not change obviously, all belong to the Freundlich adsorption model; After plasma treatment of kapok fiber dyeing hot absolute value increases, dye and fiber inter-atomic forces stronger affinity.Respectively with the plasma treatment and hyperbranched of kapok fiber modification, modification dyeing with reactive dyes, research the dyeing process, the results show that:(1) plasma modification of kapok fiber, modified process: the power of 550 w, air condition, 4.5 mm plate spacing, time of 90 s, modified kapok fiber with plasma(recent studies done by PKF), under the condition of the technology, kapok fiber dyeing rate are greatly improved, the dyeing process is: NOVACRON RED 3BL(o.w.f) 2% penetrant, JFC 2g/L, bath ratio 1:100, 40g/L Na Cl, at 60℃ temperature dyeing fiber 60 min, solid color with Na2CO3 10 g/L for 60 min. Modification of kapok fiber dyeing percentage increased from 35% to 65%.(2) The hyperbranched rare earth modification kapok fiber, determination of hyperbranched rare earth modification of kapok fiber modification process: hyperbranched rare earth(for 2g/L of hyperbranched polymer, rare earth chloride concentration for the 4g/L, 1:1 based), bath ratio 1:100, penetrant JFC 2g/L, 40 min under 40℃ constant temperature processing, modified kapok fiber with hyperbranched rare earth(HRKF). Modified kapok fiber dyeing, dye dosage is 2%(o.w.f), 40g/L Na Cl, at 60℃ under the condition of kapok fiber dyeing 60 min after the modification, with 10g/L Na2CO3 fixation for 60 min. Modified NOVACRON DARK BLUE S-GL type dye dyeing of kapok fiber dyeing percentage is 75.32%, NOVACRON RUBY S-3B dye dyeing percentage reaches 64.55%.(3) After the plasma treatment of kapok fiber, reoccupy hyperbranched rare earth modification, plasma available hyperbranched rare earth modification kapok fiber(PHRKF), can greatly increase the percentage of kapok fiber dyeing and fixation rate. Reactive dye modified NOVACRON DARK BLUE S-GL dyeing of kapok fiber dyeing percentage of 89.54%, fixation rate from 30.65% to 30.65%.