Synthesis Of Triazole Compounds And Study On Its Corrosion-resistant Character In The Wood

Triazole fungicides refer to a class of1,2,4-triazole group of fungicides, whichhave recently developed into a new type of efficient fungicide with the features ofbroad spectrum, high efficiency and low toxicity to humans and animals. In order topreparing wood protective agents with the characteristics of broad-spectrum andlong-lasting, with1,3-dichlorobenzene and1,3-difluorobenzene as raw materials tosynthesis and modify a series of triazoles in this paper. Meanwhile, compounds withstrong anti-loss performance were selected and used as the wood preservatives. Thestructures of synthetic compounds were identified by IR,1H-NMR and FT-IR. Theperformance of those triazoles be deemed to the wood preservative was preliminaryevaluated though indoor antibacterial tests, mildew experiments, corrosionexperiments and the anti-loss experiments. The main work and conclusions weredescribed as follows.1.1,3-dichlorobenzene and1,3-difluorobenzene were used as raw materials andintroducted some quality sterilization groups of triazole fungicides to synthesis aseries of triazoles. The R1, R2and R3in the synthetic compounds were not reportedin the literatures and their structures were identified by IR, NMR and massspectrometry. All the synthesized compounds were stable and there were nosignificant changes in appearance after Long-term placement. Meanwhile, the abilityof the synthesized compounds to inhibit wood decay fungi was studyed. The resultsshowed that the ability of the R1compound to inhibit mold and decay fungi was thebest; the antibacterial ability of the R2compound was considerable withtebuconazole and the remaining synthesized compounds showed no antibacterialadvantage.2. The wood mildew experiment was carried out by using the synthesized objectcompound and the wood preservatives tebuconazole was used as controlled reagent.The research found that with the increase of the absorption dose, the infection valuesof the wood samples treated by target compounds, which were invaded by two kindsof mold, decreased and the mildew resistance became more significant. From theview of the grading standards of fungus resisitance, the antifungal effect of R1andR2on aspergillus niger and trichoderma viride was better than tebuconazole used ascontrolled reagent. The study also showed that in terms of R1, the grading standardsof fungus resisitance reached the level0in concentration of1.0%, while theconcentration should be achieved to1.5%for R2. The requirements of practical application was preliminary achieved.3. The wood anticorrosive test was executed by using the synthesized objectcompound and tebuconazole was used as controlled reagent. The study showed thatwith the increase of the wood drug loading, all the weight loss rate of wood samplestreated by the different agents gradually decreased but the antibacterial activitygradually increased. The results also indicated that the antibacterial ability of woodsamples treated by the different agents was disparate and the order from strong toweak successively followed by R1, tebuconazole, R2, R3and b3.4. The goal compounds were compared with tebuconazole used as controlledreagent in the leachability experiments. The turnover rate of the goal compounds andtebuconazole was determined by HPLC. The results showed that with the increase ofthe absorption dose in the woods, the loss amount of the goal compounds andtebuconazole gradually increased, while the turnover rate gradually decreased andthe leachability property became more strong. The turnover rate of R1was thelowest and the fixed effect was the best, the loss rate was only4.8%when theconcentration of R1was1.5%. Secondly, the loss rate was5.7%when theconcentration of R2was1.5%, but the loss rate was6.8%for tebuconazole in thethe same concentration. Compared with R1and R2, the leachability effect oftebuconazole was relatively poor. But the leachability properties of b3、d3、R3wereworse than that of tebuconazole.