INVESTIGATION ON COLOR DIFFERENCE OF DYED COTTON FABRICS WITH EXTRACTS FROM Bixa orellana SEEDS THROUGH CIELAB COLOR SPACE=INVESTIGATION ON COLOR DIFFERENCE OF DYED COTTON FABRICS WITH EXTRACTS FROM Bixa orellana SEEDS THROUGH CIELAB COLOR SPACE

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Tác giả: Thi Thanh Tien Huynh, Tuan Anh Nguyen, Ngo Kim Phuong Thai

Ngôn ngữ: eng

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Thông tin xuất bản: Tạp chí Khoa học Đại học Công Thương (Tên cũ: Tạp chí Khoa học Công nghệ và Thực phẩm), 2024

Mô tả vật lý: tr.112

Bộ sưu tập: Báo, Tạp chí

ID: 479863

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Natural dyes extracted from plants are eco-friendly and biodegradable pigments, using for coloring not only food industry but also textile materials but a lot of their mysteries have not been discovered. This work is to investigate the effects of bleaching agents, dye concentration, exhausting time, mordanting sequence, mordant types and mordant contents on the dyeability of cotton fabrics with Bixa orellana (BO) extracts through color difference (DE) obtained from the CIELAB color system. Based on such investigations, the bonding mechanisms between bixin/norbixin in BO extracts and the cellulose of cotton fibers were clarified. The results demonstrated that bleaching agent prevented the absorbance of dyes into fabrics and the dyeability improved better as increasing dye concentration and exhausting time. The mordant agents enhanced the dyeability of cotton samples with BO extracts, which obtained the highest DE values when dyeing and mordanting samples simultaneously. In fact, potassium aluminum sulfate (KAl(SO4)2.12H2O) played a role as an efficient mordant which presented the higher DE value as compared to copper sulfate (CuSO4.5H2O). The color fastness of dyed samples achieved the grade 3 after a washing cycle and their color staining tests to rubbing were better as mordanting before dyeing process.Thuốc nhuộm tự nhiên chiết xuất từ thực vật là những chất màu thân thiện và phân hủy sinh học, sử dụng trong lĩnh vực nhuộm không chỉ thực phẩm mà còn vật liệu dệt nhưng còn rất nhiều bí ẩn của chúng vẫn chưa được khám phá. Nghiên cứu này khảo sát ảnh hưởng của chất tẩy, nồng độ nhuộm, thời gian tận trích, thứ tự cầm màu, loại và lượng chất cầm màu đến khả năng nhuộm vải bông với dịch chiết từ hạt điều nhuộm dựa trên độ chênh lệch màu (DE) thông qua hệ không gian màu CIELAB. Dựa trên các kết quả thực nghiệm, cơ chế liên kết giữa bixin/norbixin trong dịch chiết và cellulose của xơ bông được làm rõ. Các kết quả đã chứng minh rằng chất tẩy ngăn cản khả năng hấp thu thuốc nhuộm vào sâu trong cấu trúc vải, khả năng nhuộm của vải được nâng cao khi tăng nồng độ nhuộm và thời gian tiếp xúc. Các chất cầm màu giúp tăng cường khả năng nhuộm của vải bông với dịch chiết với giá trị đạt cao nhất khi nhuộm và cầm màu diễn ra đồng thời. Thực tế, muối nhôm (KAl(SO4)2.12H2O) đóng vai trò như một chất cầm màu hiệu quả, cho giá trị lệch màu cao hơn so với muối đồng (CuSO4.5H2O). Độ bền màu của các mẫu nhuộm đạt cấp độ 3 sau một chu kỳ giặt và độ bền màu với ma sát đạt kết quả tốt hơn khi thực hiện cầm màu trước khi nhuộm.

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