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首页> 外文会议>International Conference on Advanced Materials Engineering and Technology >Potential of Five-Leaved Chaste Tree (Vitex negundo L.) Leaves as Source of Natural Dye from Supercritical Carbon Dioxide (SC-CO_2) Extraction
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Potential of Five-Leaved Chaste Tree (Vitex negundo L.) Leaves as Source of Natural Dye from Supercritical Carbon Dioxide (SC-CO_2) Extraction

机译：五叶湿树（Vitex Negundo L.）的潜力作为来自超临界二氧化碳（SC-CO_2）提取的天然染料来源

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摘要

Natural dyes represent a sustainable source of colorants, which arc low cost and safer than synthetic dyes, concerning human health. The purpose of this study is to extract Vitex negundo L. leaves using supercritical carbon dioxide extraction and to identify the extracts' potential as a dye. The extraction process has been conducted at different operating conditions by varying temperature from 40 to 65°C with an increment of 5°C at 20,25, and 30 MPa within 60 minutes constant time. The extracts obtained at different conditions were analyzed using Gas Chromatography Mass Spectrometer (GC-MS) to determine the chemical compounds present. Increase of temperature increased the extraction yield, but further increasing the temperature above 50°C has reduced the yield. The effect of pressure gave two different patterns, in which the first one showed the yield kept increasing with pressure (20 to 30 MPa) at 40, 45, 50, and 55°C. The second pattern showed sudden reduction of yield above 25 MPa at another two higher temperatures. The highest extraction yield (13.94 mg/g) was obtained at 30 MPa and 50°C which considered as optimum operating condition. GC-MS analysis showed the presence of several phytochemicals including some flavonoid compounds, which are potential sources of dye.
机译：天然染料代表剂，其弧低成本和更安全的比合成染料，涉及人体健康的可持续发展的源泉。本研究的目的是使用超临界二氧化碳萃取提取黄荆L.叶和识别提取物的潜力作为染料。提取过程已经在不同的操作条件下，通过改变温度从40至65℃，以5℃的增量在20,25进行的，和60分钟的恒定时间内30兆帕。使用气相色谱质谱（GC-MS）来确定的化学化合物存在于不同的条件下得到的提取物进行分析。温度的增加而增加的提取率，但进一步增加高于50的温度°C降低了产率。在压力的作用，得到两个不同的图案，其中第一个显示出产量保持在40压力（20至30兆帕），45，50的增加，和55℃。所述第二图案显示收率高于25兆帕在另外两个较高温度下的突然减小。在30MPa和50℃，其被视为最佳操作条件得到最高的提取产率（13.94毫克/克）。 GC-MS分析表明几种植物化学物质包括一些类黄酮化合物，其是染料的潜在来源的存在。

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