Preparation And Properties Of Carboxymethyl Cellulose Hydrogel Fiber

With the rapid economic development, more and more people pay attention to environmental protection, bio-polymer materials development concern. Carboxymethyl cellulose(CMC) comes from nature, natural degradation, mature production technology, this raw material, preparation of CMC Hydrogel and CMC Hydrogel fiber, fiber preparation and explore CMC Hydrogel technology and CMC replaced the change’s impact on its performance. Water gel fibers can be applied for the preparation of Hydrogel dressings.Experiments are now get the following results:With pulp as raw material, through different molar ratio of sodium hydroxide and chloroacetic acid carboxy methylation, prepared by the degree of substitution was 0.47, 0.59,0.77, 0.94, CMC. Determination of viscosity CMC, PH, solubility and other basic parameters.And testing to get CMC solution at room temperature and pressure stability of the storage time of 96 hours, CMC powder particle size with increasing degree of substitution of smaller,thermogravimetric test results show that relative to the raw pulp, CMC decomposition temperature of about 70 degrees centigrade.To prepare in different degree of substitution of the CMC as raw materials, aluminium as crosslinker, CMC Hydrogel prepared. The cross-linking occurs mainly in the CMC’s hydroxyl and aluminium ion bond, through the ICP testing, finds the time is the same, the higher the degree of substitution of the CMC, higher aluminium content in the gel. Crosslinked gel soak in distilled water can still maintain shape. IR proves that the Crosslinking reaction occurs, gel DSC map and return the higher the heave experiment illustrates the degree of substitution of CMC, water retention capacity, the better. While the gel swelling ratio analysis of CMC are also shown in the degree of substitution and high temperature, swelling ratio is higher. Due to the higher the degree of substitution of CMC, its dissolution are also more completely, thus higher transmittance gel samples. Gel with optical microscopy and SEM observation of the surface and cross-section, found that the high degree of substitution, the smoother the surface of the gel, and more evenly distributed, after absorbing water than drying the gel gel is moresmooth and plump.By aluminum sulfate coagulation bath, CMC as raw materials, with a homemade wet spinning spinning tools. Orthogonal test by 4 factors, water absorption and water-retention rate of fiber as an indicator obtained optimum preparation technology of CMC Hydrogel fiber:0.94, degree of substitution of the CMC CMC concentration is 4 WT%, the concentration of coagulation bath 0.4 WT%, setting time is 4 s. Test on mechanical properties of fibers, water gel fiber strength can reach 44.72 cN/tex, fiber elongation can be reached 66.18%. Fiber moisture Dynamics shows fiber on distilled water, a solution, saline has a good absorption capacity. Moisture on distilled water works best, at 712%. Thermogravimetric description alkaline etherification processes and solution stirring on cellulose have a certain degree of damage, therefore the thermal decomposition temperature will be reduced to a certain degree.