Establishing Of A High Efficience Anti-mosquito Model By Carrier Finishing And Its Application

Mosquitoes are one of insects affecting humans’life and health significantly. Mosquito not only has direct barbed bite and harassment, but also transmits more than60diseases, such as malaria, dengue fever, filariasis, yellow fever et al. Now, in developing country, especially African country, almost one hundred million malaria diseases erupt, about one million people died because of malaria, most of children and pregnant women. Although, China haven’t suffer for mass harm for mosquito transmission, people also puzzle for mosquito biting. Therefore, anti-mosquito finishing is one of the most urgent and critical problems to solve. This thesis is focus on researching the application of anti-mosquito textile and their theory.Firstly, this thesis research on actual applied condition of anti-mosquito reagents. According to physicochemical properties of anti-mosquito reagents, carrier finishing method is the optimal method to produce high effecient anti-mosquito textile. Having compared different reagents and carriers which affected anti-mosquito textile producing, we found that OP and ZX-1(main component was2,2-bis(4-Chlorophenyl)-1,1,1-trichloroethane) were the best carrier and reagent. Then, pretreated ZX-1raw material by using extraction separation with two method to purify ZX-1. Effects of the dosage of pesticide, ZX-1, the reactive temperature and time, and the dosage of additives on the anti-mosquito textile finishing were discussed. These data showed that, the optimal treatment process was the concentration of ZX-10.6g·L-1(3%, o.w.f), ZX-1to cyclohexane mass ratio1:1.6, the concentration of carrier3g· L-1, the concentration of dispersing agent NNO0.5g·L-1, bath ratio1:50, with1.5hour under90℃. Researching on Structural analysis of anti-mosquito textile after ZX-1by carrier finishing, these results showed that ZX-i were treated on the surface of polyester fiber, and entered into amorphous regions of polyester fibers’interior; the degrees of crystallinity of polyester fiber after ZX-1anti-mosquito treatment were increased with increasing ZX-1concentrations, simultaneously, ZX-1treatment did not particularly affect the size and shape of crystallites in the polyester fiber; ZX-1treatment also didn’t influence thermostability of polyester fiber, finally, obtained long time high anti-mosquito textile.Adsorption Properties of polyester fiber absorbing ZX-1and diffusion mechanism were studied. This study included that ZX-1was water-fast and could not come into fibers’interior under normal temperature and pressure, so we chose carrier method to effectively absorb ZX-1into polyester fibers’ inner. We found carrier micromolecule quickly diffused into fibers’interior and combined with fiber by Van der waals’force or hydrogen bond, weakened the bond between fibers, increased odds of big cavities to appear and improved diffusion velocity of ZX-1. By the way, ZX-1diffusion on fibers’ surface was belong to turbosphere diffusion, its diffusionboundarylayer was very thin; ZX-1diffusion on fibers’inner was belong to free volume diffusion, and its diffusion coefficient increased with free volumes of polyester fiber increasing, it followed with one by one cavity "jump" diffusion, finally improved diffusion rate of ZX-1.At present, anti-mosquito textiles are focused on textile properties characterization, however, theoretical study rare dicusses. Thus, the thesis researched on adsorption thermodynamics and kinetics model when polyester fiber adsorbed ZX-1process. These results showed that ZX-1concentration on the fiber increased with increasing the ZX-1concentration in solution until it reached the saturation value. According to kinetics model (first-order adsorption kinetics, the pseudo-second-order adsorption kinetics and an intra-particle diffusion model) and thermodynamic model (Nernst, Langmuir, Freundlich and Dubinin-Radushkevich (D-R) isotherm model), the second-order-model was found most suitable to describe the kinetic diffusion process; Langmuir model appears to fit the adsorption of ZX-1on polyester fibers better than other adsorption models. In addition, thermodynamic parameters such as free energy (AG) and adsorption activation energy (Ea) were all showed that this adsorption process was geared to spontaneous adsorption process; enthalpy (△H°) and entropy (AS) were indicated that this adsorption process was exothermic process, and ZX-1which is absorbed by polyester fiber, was hard to desorb form polyester fiber inner. Another important part of the thesis is to study on mosquito behavior on the anti-mosquito textile in the laboratory with92generation culex as experimental subject, which was naturalized. These data showed that the optimal test condition were female cluex with3emergence day, texting time6-9PM, the concentration of attractant5%CO2, non-natural light. Actual anti-mosquito effect experiments results with anti-mosquito textile after ZX-1finishing indicated that3emergence day female cluex’s activity was the best, and its greater effect was more and more obvious with increasing concentration of ZX-1; however, its suffertibility and activities became lower with testing time extending. furthermore, anti-mosquito effect of textiles after washing was appreciably reduced when increasing washing time, but the reducing range was small; number of female cluex staying on the textiles after washing was appreciably reduced with the concentration of ZX-1on the anti-mosquitotextile increasing, compared with non-wash textile, there were also appeared with certain linear regular.