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中药挥发油膜富集过程绿色环保、切实可行,具有良好的应用前景。该文以荆芥、青皮、香附、石菖蒲、佩兰、野菊花6味中药含油水体为试验体系,采用截留相对分子质量为7万的聚偏氟乙烯膜(PVDF-7万),在40℃,0.1 MPa,150 r·min-1下过膜,富集荆芥等6种挥发油,探索膜富集过程中的理化性质、原油和截留油指纹图谱相似度的共性规律,发现不同体系具有近似的规律,在富集过程至结束,荆芥等6种含油水体的pH逐渐降低至最低;电导率逐渐变大,后变小至为0;黏度逐渐增大至最大;表面张力逐渐减小至最小;浊度逐渐增大,后减小至最小;荆芥等含油水体的密度逐渐减小至最小,石菖蒲挥发油为重油,趋势相反;盐度均为0。到达终点,渗透液pH最大,密度最大(石菖蒲油水体系相反),其余均为最小。浓缩前后油的组成相似度均超过90%。该文结果为膜富集挥发油技术产业化推广提供了一定数据支持和理论依据。
Volatile oil film enrichment process of Chinese medicine green, practical, with good prospects. In this paper, six Chinese herbal oil-bearing water bodies of Nepeta, Peel, Cymbidium, Gladiolus, Perrin and Chrysanthemum indicum were used as the experimental system. Polyvinylidene fluoride membrane (PVDF-70,000) with a molecular weight cutoff of 70,000 was used. ℃, 0.1 MPa and 150 r · min-1, respectively. Six physical and chemical properties of the volatile oil, such as Schizonepeta tenuifolia, were enriched, and the similarities and differences between fingerprints of crude oil and entrained oil were explored. The approximate rule is that the pH value of 6 kinds of oil-bearing water body, such as Nepeta, gradually decreases to a minimum when the enrichment process is over. The conductivity gradually becomes larger and then decreases to 0, the viscosity gradually increases to the maximum, and the surface tension gradually decreases The turbidity gradually increased and then decreased to the minimum; the density of oil-bearing water bodies such as Schizonepeta tenuifoliaceae gradually decreased to the minimum, and the volatile oil of Acorus calamus was the heavy oil with the opposite trend; Arrived at the end, the maximum permeate pH, the highest density (Shichangpu oil and water system on the contrary), the rest are the smallest. The compositional similarity of oil before and after concentration is more than 90%. The results provide a certain data support and theoretical basis for the industrialization of membrane-rich volatile oil technology.