納米纖維素復(fù)合芳香功能材料的制備和表征
本文選題:精油 + 木醋液。 參考:《東北林業(yè)大學(xué)》2015年碩士論文
【摘要】:以芳香植物精油、木醋液為原料,制各納米纖維素復(fù)合芳香功能材料,并對其性能進(jìn)行表征。芳香植物以木犀科(Oleaceae)丁香屬(Syringa)歐丁香(S. vulgaris)為代表,采用多相同時(shí)蒸餾萃取法提取植物精油,通過氣相色譜-質(zhì)譜(GC-MS)法分析其芳香組分,并分析了歐丁香葉精油的季節(jié)動(dòng)態(tài)。研究結(jié)果表明歐丁香花、果實(shí)和葉精油香氣成分以較低GC含量存在,為木香等香氣,6月采集歐丁香葉精油得率最高。4種納米纖維素復(fù)合芳香植物精油膜的制備和表征結(jié)果表明,納米纖維素復(fù)合芳香植物孔雀草花(Tagetes patula)精油膜的平均厚度較小(0.030mm)且拉伸強(qiáng)度較大(51.80Mpa)。波長范圍在200nm~400nm的近紫外區(qū),4種納米纖維素復(fù)合芳香植物精油膜的透光率隨著波長的增加而增大;波長范圍在400nm~800nm的可見光區(qū),納米纖維素復(fù)合芳香植物東北接骨木(Sambucus williamsii)葉精油膜的透光率最高。掃描電子顯微鏡圖分析結(jié)果表明納米纖維素復(fù)合芳香植物精油膜的微觀形貌較平整。芳香植物以樺木科(Betulaceae)樺木屬(Betula)白樺(B. platyphylla)為代表,以白樺(B. platyphylla)等芳香植物撫育采伐廢棄物為原料,采用干餾法制備木醋液,木醋液有機(jī)酸類成分中的甲酸、苯甲酸(安息香酸)、乙酸、環(huán)己烷乙酸、丙酸、丁酸、戊酸、3-甲基戊酸、巴豆酸、香草酸為芳香化合物。以木醋液為芳香功能原料制備了納米纖維素復(fù)合芳香功能材料,并對其抑菌活性等進(jìn)行分析和性能表征。采用SPSS 19.0軟件對納米纖維素復(fù)合芳香功能材料的抑菌圈直徑進(jìn)行方差分析等。研究結(jié)果表明5種納米纖維素復(fù)合芳香功能材料對金黃色葡萄球菌(Staphylococcus aureus)、大腸桿菌(Escherichia coli)、黑曲霉(Aspergillus niger)均有抑制作用,尤其對細(xì)菌具有較強(qiáng)的抑制作用。納米纖維素復(fù)合芳香功能材料對金黃色葡萄球菌的抑菌圈直徑高達(dá)21.48±1.02mm,對大腸桿菌的抑菌圈直徑高達(dá)21.21±1.74mm。以木醋液為芳香功能原料制備了芳香復(fù)合膜,并對其力學(xué)性能等進(jìn)行分析和性能表征。研究結(jié)果表明制備的5種芳香復(fù)合膜中,PVA/貯藏桶上部白樺精制木醋液/PVA復(fù)合膜的平均厚度較小(0.67mm),拉伸強(qiáng)度較大(82.47 Mpa),斷裂伸長率較小(17.5%)。對其透光率等進(jìn)行分析和性能表征,結(jié)果表明5種芳香復(fù)合膜中,波長范圍在200nm~400nm的近紫外區(qū),5種芳香復(fù)合膜的透光率隨著波長的增加而增大;波長范圍在400nm-800nm的可見光區(qū),PVA/貯藏桶下部白樺精制木醋液/PVA復(fù)合膜的透光率最高。
[Abstract]:Nano-cellulose composite aromatic functional materials were prepared from aromatic plant essential oil and wood vinegar, and their properties were characterized. The aromatic plants, represented by Syringa (S. vulgaris) of Oleaceae, were extracted from plant essential oils by multi-time distillation and extraction. Their aromatic components were analyzed by gas chromatography-mass spectrometry (GC-MS), and the seasonal dynamics of essential oils from Oleaceae leaves were also analyzed. The results showed that the aroma components of the essential oil of Eugenia lilac, fruit and leaf existed in the form of low GC content, which was the aroma of woody. The preparation and characterization of essential oil film of 4 kinds of nano-cellulose compound aromatic plant obtained in June was the highest in the collection of essential oil from the leaves of Odin. The average thickness (0.030mm) and tensile strength (51.80Mpa) of the essential oil film of nano-cellulose combined with aromatic peafowl patula were smaller (0.030mm) and higher (51.80Mpa). The transmittance of four kinds of nano-cellulose composite aromatic essential oil films in the near ultraviolet region of 200nm~400nm increases with the increase of wavelength, and the wavelength range is in the visible region of 400nm~800nm. The light transmittance of the essential oil film of the aromatic plant Sambucus williamsii was the highest. Scanning electron microscopy (SEM) analysis showed that nano-cellulose composite aromatic essential oil film had a flat microcosmic morphology. Aromatic plants, such as Betula Bai Hua (B. platyphylla) and Bai Hua (B. platyphylla), were used as raw materials to prepare wood vinegar liquid, formic acid in organic acid components of wood vinegar solution, using Bai Hua (B. platyphylla) and other aromatic plant felling wastes as raw materials. Benzoic acid (benzoic acid), acetic acid, cyclohexane acetic acid, propionic acid, butyric acid, valerate 3-methyl valeric acid, crotonic acid, vanillic acid are aromatic compounds. Nanocellulose composite aromatic functional materials were prepared from wood vinegar as aromatic functional materials and their bacteriostatic activities were analyzed and their properties were characterized. Using SPSS 19.0 software, the diameter of bacteriostatic circle of nano-cellulose composite aromatic functional materials was analyzed by variance analysis. The results showed that five kinds of nano-cellulose composite aromatic functional materials had inhibitory effects on (Aspergillus niger) of Staphylococcus aureus), coli), especially on bacteria. The diameter of bacteriostasis circle was 21.48 鹵1.02 mm for Staphylococcus aureus and 21.21 鹵1.74 mm for Escherichia coli. The aromatic composite membranes were prepared from wood vinegar as aromatic functional materials and their mechanical properties were analyzed and characterized. The results showed that the average thickness (0.67mm), tensile strength (82.47Mpa) and elongation at break (17.5%) of PVA / Bai Hua / PVA composite membranes were lower. The light transmittance of 5 kinds of aromatic composite films was analyzed and characterized. The results showed that the transmittance of 5 kinds of aromatic composite films in the near ultraviolet region of 200nm~400nm increased with the increase of wavelength. The transmittance of PVA / Bai Hua / PVA composite membrane was the highest in the visible region of 400nm-800nm.
【學(xué)位授予單位】:東北林業(yè)大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2015
【分類號】:TB34;O636.11
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