2种小檗植物理化性质及阻燃性的比较

Comparative Study on Physical and Chemical Properties and Flame Retardancy of Two Berberis Species

为比较河北省石家庄市藁城区2种小檗植物阻燃性质差异,对园林城市选择小檗防火林带等基础工作提供理论依据。在重点防火期(2月中旬)对新品种冰川红叶小檗和园林常用绿化植物紫叶小檗大枝、小枝进行阻燃性开展研究,借助SPSS 18.0和Origin 2019等软件,运用主成分分析法对影响植物燃烧性的含水率、苯-醇抽提物、木质素、粗纤维、粗灰分、燃点、高低位热值等7个理化性质指标进行分析,并利用热重分析仪得到TG-DTG曲线计算热解动力学方程,求得2个小檗品种大枝及小枝的活化能(E)和指前因子(A),研究其热解特性和热解动力学特征,对2个小檗品种阻燃性进行综合评价。综合来看,冰川红叶小檗阻燃性大于紫叶小檗,大枝比小枝阻燃性强,研究结果可为2个小檗品种阻燃性提供重要数据。

This paper aimed to compare the flame retardant properties of two Berberis species in Gaocheng District of Shijiazhuang City, Hebei Province, and provide theoretical basis for the selection of fire-resistant forest belts of Berberis in garden cities.We examined tree combustibility using big and small branches of new species Berberis thunbergii′Bingchuanhongye′ and common garden greening Berberis thunbergii ′Atropurpurea′during fire prevention period(mid-February),used principal component analyses in SPSS 18.0 and Origin 2019 software to analyze the seven physical and chemical properties including moisture content, benzene-alcohol extract content, lignin, polysaccharide, crude ash, ignition point, high and lower caloric values that affected combustibility of trees.Thermogravimetric analysis instruments were used to obtain TG-DTG curve and calculate the pyrolysis kinetics equation to obtain the activation energy(E)and pre-exponential factor(A)in large and small branches among two Berberis species.The pyrolysis characteristics and kinetics parameters were studied, and combustibility of two Berberis species was assessed comprehensively.In general, B.thunbergii′Bingchuanhongye′ was more flame retardant than B.thunbergii′Atropurpurea′,big branches were more flame retardant than small branches.These results provided an important data for the flame retardancy of two Berberis species.