三种松香季铵盐的合成及抑木腐菌性能研究
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摘要
木材是一种天然的可再生生物材料,其开发和利用符合环保的要求,但是它的主要缺点之一是容易受到微生物等的侵害而腐朽,从而影响其使用。随着木材的需求量日益增加,木材防腐产业成为了节约森林资源的重要途径。
     本文以松香为原料合成了几种具有抑菌活性和表面活性的松香基季铵盐。松香基季铵盐的合成,一方面充分利用了松香这一可再生资源,大大提高了它的附加值,另一方面为合成价格低廉、高活性、无毒、环保、易生物降解的木材防腐剂提供新的种类。
     以松香为原料,合成了N-(3-松香酰氧-2-羟)丙基-N,N-二甲基氯化铵,首先松香与环氧氯丙烷进行反应,反应物的摩尔比为n(松香):n(环氧氯丙烷)=1:2,在90℃下反应时间为3.5 h,将产物与二甲胺以摩尔比1:2在80℃下反应2.5h,生成N-(3-松香酰氧-2-羟)丙基-N,N-二.甲基氯,最后再与环氧氯丙烷在90℃下反应3h,反应摩尔比为1:1得到季铵盐的得率为72.8%。因原料松香中含有很多杂质,故以脱氢松香为原料用同一方法合成了N-(3-脱氢松香酰氧-2-羟)丙基-N,N-二甲基氯化铵,通过对其结构的表征来证明目标产物N-(3-松香酰氧-2-羟)丙基-N,N-二甲基氯化铵的结构,利用FTIR、HPLC、1H-NMR对N-(3-脱氢松香酰氧-2-羟)丙基-N,N-二甲基氯化铵的结构进行了确证。测定了N-(3-松香酰氧-2-羟)丙基-N,N-二甲基氯化铵对四种木材腐朽菌黑曲霉(Aspergillus niger)、宛氏拟青霉(Paecilomyces variot Bainier)、彩绒革盖菌(Coriolus versicolor)、密黏摺菌(Gloeophyllum trabeum)的抑菌性能,发现对四种木腐菌均有抑制效果,尤其是对密黏摺菌的抑制效果最好。选择N-(3-松香酰氧-2-羟)丙基-N,N-二甲基氯化铵浓度为16 mg/mL、32 mg/mL、64 mg/mL,浸泡试材木块,进行木块微生物培养实验,’用失重法检测松香基酰胺对木材的防腐性能,结果显示松香基酰胺的浓度在64mg/mL时对彩绒革盖菌和密粘褶菌获得了Ⅰ级防腐。
     以松香为原料,与丙烯酸反应后,经环氧氯丙烷改性,再与二甲胺反应,得到的产物再与环氧氯丙烷在80℃下反应4.5h,反应的摩尔比为1:3得到双N-(3-松香酰氧基-2-羟)丙基-N,N-二甲基氯化铵。利用FTIR、HPLC、1H-NMR对其官能团及结构进行了表征,季铵盐得率为92.8%。用双N-(3-松香酰氧基-2-羟)丙基-N,N-二甲胺基氯化铵对绵腐卧孔菌(Postia placenta),彩绒革盖菌(Coriolus versicolor)、密粘褶菌(Gloeophyllum trabeum)、乳白耙菌(Irpex lacteas)四种菌进行了抑菌试验,发现对四种菌均有较好的抑制效果,尤其是绵腐卧孔菌和乳白耙菌。选择双N-(3-松香酰氧基-2-羟)丙基-N,N-二甲胺基氯化铵浓度为16 mg/mL、32 mg/mL、64 mg/mL,浸泡试材木块,进行木块防腐实验,用失重法评价了双N-(3-松香酰氧基-2-羟)丙基-N,N-二甲胺基氯化铵对木材的防腐性能,结果显示双N-(3-松香酰氧基-2-羟)丙基-N,N-二甲胺基氯化铵浓度在64 mg/mL时对彩绒革盖菌、密粘褶菌都是获得了Ⅰ级防腐。通过测定表面张力手段研究了双N-(3-松香酰氧基-2-羟)丙基-N,N-二甲胺基氯化铵的表面活性,其临界胶束浓度(CMC)为8×10-3mol/L,表面张力(γCMC)为39.38mN/m,乳化力为56min,泡沫力为250mm,泡沫稳定性为200 mm。
     以松香为原料与丙烯酸反应生成改性松香,再将改性松香与三乙胺与环氧氯丙烷进行反应所生成的季铵盐中间体环氧丙基三乙基氯化铵进行反应,生成产物双N-(3-松香酰氧基-2-羟)丙基-N,N-三乙基氯化铵,并通过重量法得出季铵盐产率为87.7%。分别利用了FTIR、HPLC对产物的结构进行了表征,结果证明已合成目标产物。利用菌丝倒扣法测定了双N-(3-松香酰氧基-2-羟)丙基-N,N-三乙基氯化铵对绵腐卧孔菌(Postia placenta),彩绒革盖菌(Coriolus versicolor)、密粘褶菌(Gloeophyllum trabeum)、乳白耙菌(Irpex lacteas)四种菌进行了抑菌试验,当浓度为0.5 mg/mL时,对于彩绒革盖菌、密粘褶菌及绵腐卧孔菌均有明显的抑制效果,当浓度为1 mg/mL时才对乳白耙菌有明显抑制效果。
Wood is a kind of nature renewable resource. The exploration and the use of wood are environmentally safe, however, wood is low decay resistance. With the need of wood increasing, wood protection becomes an important way of saving the forest resources.
     In this paper, rosin is used as raw material to synthesize some kinds of rosin derivatives which have anti-fungal activity and surface activity. Synthesis based on rosin not only can make full use of this renewable resource and can increase greatly its additional value but also can prompt the industry of deep processing development of rosin. Wood preservatives from rosin are renewable, active and environment-friendly.
     i.Rosin was used as raw material to prepare N-(3- rosin acyloxy-2-hydroxyl) propyl-N, N dimethylamine chloride. Firstly, the rosin was esterified by epoxy chloropropane with the mole ratio of 1:2, the reaction time of 3.5h at 90℃. The intermediate was 3-rosin acyloxy-2-hydroxypropyl chlorine. Then, the intermediate reacted with demethylamine to produce N-(3-rosin acyloxy-2-hydroxyl) propyl-N, N dimethylamine at the following conditions:their mole ratio of 1:2, reaction temperature of 80℃and reaction time of 2.5h. Finally, the N-(3-rosin acyloxy-2-hydroxyl) propyl-N, N dimethylamine was quaternized by epoxy chloropropane with the mole ratio of 1:1, the reaction time of 3h at 90℃. The content of the product was characterized by gravimetric analysis with sodium tetraphenylborate as its precipitation reagent and the yield was 72.8%. There are many impurities in the rosin, so N-(3-dehydrogenated rosin acyloxy-2-hydroxyl) propyl-N, N dimethylamine chloride was synthesized in the same mechanism used to characterize the structure of N-(3-rosin acyloxy-2-hydroxyl) propyl-N, N dimethylamine chloride. The chemical structure of the product was identified by FTIR、HPLC、1H-NMR.
     The antifungal activity of the product was determined by paper-disc method with wood decay fungi such as Trametes versicolor, Gloeophyllum trabeum and wood stain fungi such as Aspergillus niger and Paecilomyces variot Bainier. The anti-fungal experiment results signified that the N-(3-rosin acyloxy-2-hydroxyl) propyl-N, N dimethylamine chloride, is active to these fungi, especially Gloeophyllum trabeum.. The concentrations of the product are 16 mg/mL,32 mg/mL and 64 mg/mL. The weight-loss method was used to detect the performance of N-(3-rosin acyloxy-2-hydroxyl) propyl-N, N dimethylamine chloride on wood protection. The result show that when the concentration of N-(3-rosin acyloxy-2-hydroxyl) propyl-N, N dimethylamine chloride is 64 mg/mL, the resistence to Trametes versicolor, Gloeophyllum trabeum is on the first grade of the wood protection.
     2. Rosin was used as material to prepare bisN-(3-rosin acyloxy-2-hydroxyl) propyl-N, N dimethylamine chloride firstly, the rosin was modified by acrylic acid and a carboxylic acid group was introduced to the rosin. Secondly, the modified rosin reacted with the epoxy chloropropane, the intermediate I was obtained by the way. Thirdly, the intermediate reacted with dimethylamine. By this way the intermediateⅡwas synthesized. Finally the intermediate II reacted with the epoxy chloropropane in the mole ratio of 1:3, the reaction time of 4.5h at 80℃. The content of the product was characterized by gravimetric analysis with sodium tetraphenylborate as its precipitation reagent and the yield was 92.8%. The chemical structure of the product was identified by FTIR、HPLC、1H-NMR. The antifungal activity of the product was determined by paper-disc method with wood decay fungi such as Coriolus versicolor Gloeophyllum trabeum Irpex lacteas and Postia placenta. The anti-fungal experiment results signified that the bisN-(3-rosin acyloxy-2-hydroxyl) propyl-N, N dimethylamine chloride, is active to these fungi, especially Irpex lacteas and Postia placenta. The concentrations of the product are 16 mg/mL,32 mg/mL and 64 mg/mL. The weight-loss method was used to detect the performance of bisN-(3-rosin acyloxy-2-hydroxyl) propyl-N, N dimethylamine chloride on wood protection. The result show that when the concentration of bisN-(3-rosin acyloxy-2-hydroxyl) propyl-N, N dimethylamine chloride is 64 mg/mL, the resistence to Trametes versicolor, Gloeophyllum trabeum is on the first grade of the wood protection. BisN-(3-rosin acyloxy-2-hydroxyl) propyl-N, N dimethylamine chloride has a critical micellar concentration (CMC) of 8×10-3mol/L, a surface tension of 39.381mN/m, an emulsification activity of 56min, a height of foam of 250 mm, and a foam stability of 200 mm.
     BisN-(3-rosin acyloxy-2-hydroxyl) propyl-N, N triethylamine was synthsised by three steps. Firstly, the modified rosin was synthesised by the reaction of rosin and acryl acid. Secondly, the modified rosin was esterified with epoxy chloropropane with the mole ratio of 1:3, the product was 3-rosin acyloxy-2-hydroxypropyl chlorine. Finally, the intermediate reacted with epoxy propyl triethyl ammonium chloride to produce bisN-(3-rosin acyloxy-2-hydroxyl) propyl-N, N triethylamine. The content of the product was characterized by gravimetric analysis with sodium tetraphenylborate as its precipitation reagent and the yield was 87.7%. The chemical structure of the product was identified by FTIR、HPLC. Antifungal assays of bisN-(3-rosin acyloxy-2-hydroxyl) propyl-N, N trimethylamine chloride were performed based on the method of Chang et al. (1999) with slight modifications with wood decay fungi such as Coriolus versicolor Gloeophyllum trabeum Irpex lacteas and Postia placenta. The anti-fungal experiment results signified that the bisN-(3- rosin acyloxy-2-hydroxyl) propyl-N, N trimethylamine chloride is active to these fungi, when the concentration of the product is 0.5 mg/mL, the resistence to Coriolus versicolor Gloeophyllum trabeum and Postia placenta was obvious, when the concentration of the product is 1.0 mg/mL, the resistence to Irpex lacteas was obvious.
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