Research On The Preparation And Properties Of The Anti-mosquito Regenerated Cellulose Fiber

In recent years, with the development of society and the improvement ofconsumption level, people’s clothing comfort and functional health and put forwardhigher requirements. Many diseases due to mosquito bites, affects the health of peopleand even threat to life, prevention of mosquito bites research has received widespreadattention, anti-mosquito functional textile development be imperative. There are mainlytwo methods for manufacturing anti-mosquito textiles, one method gives mosquito-prooffunction by finishing the fabrics with anti-mosquito reagents; the other endows thefunction by preparing fiber with special reagents. The disadvantage of the first methodis apparent that the anti-mosquito function is shortly durable after washing. So torecover the function, the fabrics should go through finishing again. For enhancing theduration of repellent function, another development way is needed. through mosquitocellulose development just can make up for these shortcomings. With the decrease ofthe cultivated land and the petroleum resource is increasingly dried up, people in theimportance of textiles environmental performance while recognizing the importanceof development of regenerated cellulose fibers, Regenerated cellulose fiber materialfrom cellulose, cellulose is a renewable natural resource, at the same time, regeneratedcellulose fiber and other cellulosic incomparable excellent characteristics, such asgood hygroscopicity, wearing comfort, environmental protection and can be naturaldegradation. As a textile fiber, functional regenerated cellulose fiber has beenfunctional textiles development one of the important raw materials.The cattail fiber and cellulose pulp as raw material, add the efficient naturalinsect repellent, using blend spinning with copper ammonia solution wet spinning ofregenerated cellulose fiber preparation of mosquito. The experimental materials wereprocessed using a self-made experimental device, wet spinning, a series of fiberpreparation experiment, discussed the different spinning process parameter effects onproperties of fiber, and the preparation of regenerated cellulose fiber mosquitomosquito prevention effect test and analysis. First of all, the experimental materials of cattail fiber chemical composition wasanalyzed, the purification and activation pretreatment. Discovery of cattail fiber inaddition to wax content is high, other chemical components and other common naturalcellulose fibers differ not quite, the cattail fiber before lysis, wax removal andcellulose purification is necessary. Design the cellulose purification process,specifically using ethanol and benzene mixture mixture on wax removal, pectinremoval using ammonium oxalate, using dilute sulfuric acid and sodium bicarbonatekept circulating treatment, remove the lignin and cellulose.The purified cellulose byinfrared spectrum testing, good purification effect. In order to improve the cellulose incopper ammonia solution solubility, using15%sodium hydroxide and15%’s sparsesulfuric acid on cattail fiber activation treatment, By infrared spectroscopy and XRDanalysis, results show that whether the alkali activation or the acid activation ofcellulose, degree of polymerization and the crystallinity decreased, at the same timeundermines the cellulose molecules inside the part of the hydrogen bond, to make freehydroxyl number, for the dissolution of cellulose has played a positive role, in relativeterms by alkali activation effect is better.Secondly, the cellulose in copper ammonia solution in the dissolution processwas observed, with copper ammonia solution solubility of cellulose were analyzed,with copper ammonia solution rheological properties were studied. Results show thatcellulose in copper ammonia solution first swelling occurs, then the cellulosemolecular chains continue to break cellulose is dissolved. Upon activation of thecellulose in copper ammonia solution solubility increased significantly, whilecellulose in copper ammonia solution solubility with Cu2+concentration increasing,from the economic interests of Cu2+content should be controlled in the range of18-20%; The lower the temperature of cellulose in copper ammonia solution solubilityis higher, the predetermined temperature was0℃. Cellulose in copper ammoniasolution dissolved rapidly, approximately2H can complete lysis, Cellulose copperammonia solution rheology on concentration, the temperature dependence of therheological behavior of high, is not easy to control, spinning forming process stabilityis hard to control, and after the coating is preferably natural mosquito repellent, foundcitronellal and peppermint oil anti-mosquito effect is good.Once again, of solidification conditions on mosquito as-spun fiber structure andtensile properties of. Think different spinning coagulation conditions of preparation ofnascent fiber structure is different, should be used for20%sodium hydroxide concentration of coagulation bath, coagulation bath temperature is30℃,solidification time should not be too long, this process preparation of nascent fibersthe uniform structure and tensile properties. Nascent fibers the tensile properties andmoisture content of the larger relationship, in the damp and hot tensile condition,obtain the mosquito tensile properties, instead of as-spun fiber moisture content is low,the fiber tensile behavior of brittle, fiber strength is low.At last, the mosquito fibers were studied by scanning electron microscope,infrared spectroscopy (FT-IR) and XRD, tensile properties as well as the mosquitoproof effect were tested and analyzed, and the copper ammonia fiber are compared.The results show mosquito fiber and ordinary compared to the fiber strength and thecrystallinity decreased, other aspects of difference, anti-mosquito fiber mosquitoprevention effect is better, can reach78%, which is composed of a very goodprospects for mosquito control functional regenerated cellulose fiber.