高温对毛竹防霉剂丙环唑防霉性能的影响

Heat with propiconazole to treat bamboo mold fungi

竹材在加工过程中常处于高温环境,如干燥、热压或蒸煮等。为了了解丙环唑作为竹防霉剂,经高温处理后对竹材的防霉效果,以4年生新伐毛竹Phyllostachys edulis为试材,以丙环唑为防霉药剂,分别在135℃和150℃处理90 min,测试竹材的室内和野外防霉性能。结果表明:高温处理对丙环唑的防霉效果不仅没有降低,反而比未经高温处理的丙环唑的防霉效果有所提高。热分析结果显示:试验所选温度,即竹材热压工艺中常用温度,低于丙环唑的分解温度。因此,丙环唑处理竹材在此温度下加工不影响其防霉效果。红外结果显示,高温处理的丙环唑化学结构没有受到影响。

Bamboo can be exposed to high temperatures during drying, hot pressing, and boiling. To determine the mold resistance of bamboo using propiconazole （PPA） after high temperature treatment, new cuttings of four-year-old Phyllostachys edulis were used as material with PPA applied at 135 ℃ and 150 ℃ for 90 min. Both laboratory and field anti-fungi experiments were conducted on treated bamboo to evaluate resistance a- gainst mold fungi. Results showed that the resistance against mold fungi of 10.0 g·kg^-1 heat treated PPAs im- proved about 40%-60% than unheated ones. The thermal analysis showed that the temperature of 150 ℃, which is commonly adopted by the bamboo industry, was below the decomposition temperature of propiconazole. FrIR results also showed that the high-temperature treatment did not affect the chemical structure of propi- conazole. Thus, PPA treated bamboo processed below 150 ℃ would show good resistance against mold fungi. [Ch, 7 fig. 2 tab. 18 ref.]