纳米纤维素复合芳香功能材料的制备和表征

发布时间：2018-06-30 19:17

本文选题：精油 + 木醋液　；参考：《东北林业大学》2015年硕士论文

【摘要】：以芳香植物精油、木醋液为原料,制各纳米纤维素复合芳香功能材料,并对其性能进行表征。芳香植物以木犀科(Oleaceae)丁香属(Syringa)欧丁香(S. vulgaris)为代表,采用多相同时蒸馏萃取法提取植物精油,通过气相色谱-质谱(GC-MS)法分析其芳香组分,并分析了欧丁香叶精油的季节动态。研究结果表明欧丁香花、果实和叶精油香气成分以较低GC含量存在,为木香等香气,6月采集欧丁香叶精油得率最高。4种纳米纤维素复合芳香植物精油膜的制备和表征结果表明,纳米纤维素复合芳香植物孔雀草花(Tagetes patula)精油膜的平均厚度较小(0.030mm)且拉伸强度较大(51.80Mpa)。波长范围在200nm～400nm的近紫外区,4种纳米纤维素复合芳香植物精油膜的透光率随着波长的增加而增大；波长范围在400nm～800nm的可见光区,纳米纤维素复合芳香植物东北接骨木(Sambucus williamsii)叶精油膜的透光率最高。扫描电子显微镜图分析结果表明纳米纤维素复合芳香植物精油膜的微观形貌较平整。芳香植物以桦木科(Betulaceae)桦木属(Betula)白桦(B. platyphylla)为代表,以白桦(B. platyphylla)等芳香植物抚育采伐废弃物为原料,采用干馏法制备木醋液,木醋液有机酸类成分中的甲酸、苯甲酸(安息香酸)、乙酸、环己烷乙酸、丙酸、丁酸、戊酸、3-甲基戊酸、巴豆酸、香草酸为芳香化合物。以木醋液为芳香功能原料制备了纳米纤维素复合芳香功能材料,并对其抑菌活性等进行分析和性能表征。采用SPSS 19.0软件对纳米纤维素复合芳香功能材料的抑菌圈直径进行方差分析等。研究结果表明5种纳米纤维素复合芳香功能材料对金黄色葡萄球菌(Staphylococcus aureus)、大肠杆菌(Escherichia coli)、黑曲霉(Aspergillus niger)均有抑制作用,尤其对细菌具有较强的抑制作用。纳米纤维素复合芳香功能材料对金黄色葡萄球菌的抑菌圈直径高达21.48±1.02mm,对大肠杆菌的抑菌圈直径高达21.21±1.74mm。以木醋液为芳香功能原料制备了芳香复合膜,并对其力学性能等进行分析和性能表征。研究结果表明制备的5种芳香复合膜中,PVA/贮藏桶上部白桦精制木醋液/PVA复合膜的平均厚度较小(0.67mm),拉伸强度较大(82.47 Mpa),断裂伸长率较小(17.5%)。对其透光率等进行分析和性能表征,结果表明5种芳香复合膜中,波长范围在200nm～400nm的近紫外区,5种芳香复合膜的透光率随着波长的增加而增大；波长范围在400nm-800nm的可见光区,PVA/贮藏桶下部白桦精制木醋液/PVA复合膜的透光率最高。
[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 卤1.02 mm for Staphylococcus aureus and 21.21 卤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.
【学位授予单位】：东北林业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB34;O636.11

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