Optimization of conventional and ultrasoundassisted extraction of Paeonia officinalis anthocyanins, as natural alternative for a green technology of cotton dyeing

Romanian Biotechnological Letters Pub Date : 2021-02-02 DOI:10.25083/RBL/26.2/2527.2534

S. Oancea, M. Perju, D. Coman, H. Olosutean

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引用次数: 4

Abstract

Plant pigments gained popularity over synthetic dyes because of safety issues regarding the impact on health and environment. The present paper deals with optimization of anthocyanins extraction from Paeonia officinalis L. flowers and their application in cotton eco-dyeing processes. The results on extraction and mathematical models indicate improved extraction by ultrasonication at high solvent/solid ratio (50/1) compared to that by maceration. Among the investigated extraction solvents, the most efficient was 70% ethanol. Cotton dyeing was performed via conventional procedure and ultrasonication, in the presence and absence of classic mordant (copper sulphate) and biomordants (tannic and citric acids). A successful dyeing was obtained according to ATR-FTIR analysis of mordanted dyed samples. The colour properties of dyed cellulosic substrates as determined by CIELAB system showed higher redness values and large positive differences in chroma in samples dyed with peony extract by exhaustion in presence of high concentration of citric acid.

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优化传统和超声辅助提取丹参花青素的工艺，作为天然的绿色染色替代工艺

由于对健康和环境的影响，植物色素比合成染料更受欢迎。本文研究了芍药花花青素提取工艺的优化及其在棉花生态染色中的应用。提取和数学模型的结果表明，与浸渍相比，在高溶剂/固体比（50/1）下超声提取得到了改善。在所研究的提取溶剂中，最有效的是70%的乙醇。棉花染色是通过常规程序和超声波处理，在存在和不存在经典媒染剂（硫酸铜）和生物媒染剂的情况下（单宁酸和柠檬酸）进行的。根据对媒染剂染色样品的ATR-FTIR分析，获得了成功的染色。通过CIELAB系统测定的染色纤维素基质的颜色特性显示，在高浓度柠檬酸存在下，用牡丹提取物通过耗竭染色的样品中，红色值较高，色度存在较大的正差异。

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来源期刊

Romanian Biotechnological Letters 生物-生物工程与应用微生物

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审稿时长

3 months