Nano Copper Oxide And Nano Zinc Oxide Composite Material Preparation And Wood Preservation Performance Study

Papers prepared by wet milling of copper oxide and zinc oxide nano-composite preservative during the main factors affecting the particle size study, get wet grinding of copper oxide and zinc oxide nano-composite preservatives optimum conditions, and its testing; nanocomposites for wet grinding surface modification suspension experimental study, to determine the surfactant ammonium citrate as the impact of the suspension particle size of the main factors for single-factor experiments, and obtained the appropriate factors values, and then through orthogonal experiment to determine the optimal preparation conditions; under optimum conditions obtained nanocrystalline copper oxide and zinc oxide composite wood preservatives to poplar and pine for the experimental conditions, in accordance with national standards adopted color white rot fungus Coriolus versicolor, dense sticky brown rot fungi as experimental strains pleated bacteria on copper oxide and zinc oxide nano-composite wood preservatives performance was investigated experimentally. The main research work are summarized as follows:(1) By comparing the test, there is determined compared with other dispersing agents, add ammonium citrate as a dispersant CuO and ZnO composite powders after wet grinding, nano particle size is smaller and more uniform and stable.(2) Nanometer copper oxide and nano-zinc oxide particle size and zeta potential of the main factors in the wet milling process univariate analysis experiment to find the best preparation conditions range:grinding machine stars to speed of2500rpm/min to4500rpm/min; polishing time of1to2.5hours; ammonium citrate of the dispersing agent added in an amount40%to70%mass fraction; PH value of6-12; ultrasonic time of30minutes; CuO and ZnO ratio of1:1; The material concentration of from1.25to5%.(3) The use of orthogonal test calculations and to determine the wet grinding nano copper oxide and nano-zinc oxide composite optimum conditions:50%of the proportion of dispersant; grinding time2.5h; material concentration of1.25%; PH value of10; grinding speed4000r/min; ultrasonic time30minutes; CuO and ZnO ratio of1:1. Preparation of this condition, the average particle diameter of the nano-composite preservatives41.7nm, Zeta potential33.14mV.(4) To the color of white rot fungi suede leather cover bacteria, the brown-rot fungus dense sticky pleated bacteria as experimental strains, use of perforation law inhibitory comparative test proved that nano CuO-ZnO composite wood compared with ordinary CuO-ZnO powder mixture and preservatives have greater inhibition zone, antibacterial better.(5)According to the National Institute of Standards Populus tomentosa (Populustomenlosa Carr.) And Pinus sylvestris (P.sylvestris var.mongolica Litv.) is selected As experimental material, the use of white rot fungi versicolor bacteria and brown rot fungi the dense sticky pleated bacteria as test strains, the selection preservative concentration of1.25%,2.5%,5%,7.5%,10%, wood preservatives on the decay fungi toxic laboratory test, temperature and humidity tank culture for12weeks, calculate each test kind of decadent quality loss percentage, as a basis for the identification of the antiseptic properties of nanocomposite preservative for wood, the results showed that wood preservatives decay fungi toxicity laboratory test results are basically consistent with the experimental results of the perforation method, the end of the preservative experimental period of12weeks after Populus tomentosa and Pinus sylvestris corrosion ability of bacteria significantly improve weight loss rate is significantly lower, slightly better than the ACQ preservative.(6) Compared to the low concentration state, and the nano-copper oxide ZnO composite preservatives and ACQ preservatives has good resistance to loss of performance, the preservative in a concentration of1.25%and2.5%, a state where the fixing rate at about90%.