锦绣杜鹃花色苷微胶囊的制备及其稳定性研究

doi:10.3969/j.issn.0253-2417.2023.02.003

Abstract

Abstract:

In order to improve the stability of anthocyanins and broaden their application in functional products, the preparation process of Rhododendron pulchrum flowers anthocyanin microcapsules was optimized by response surface methodology, which was made using gum acacia and whey protein as wall materials and anthocyanin as core material. The anthocyanin microcapsules were characterized by scanning electron microscope(SEM), Fourier infrared spectroscopy(FT-IR) and thermogravimetry(TG). The results showed that the optimal microencapsulation conditions for the preparation of anthocyanin microcapsules by spray drying were as follows: wall-core ratio of 4:1, inlet air temperature of 165℃, and feed flow of 500 mL/h. Under these conditions, the embedding rate of anthocyanin microcapsules was(89.28±1.05)%. SEM showed that anthocyanin microcapsules were uniform spherical particles with a diameter of about 4.0 μm, compact structure, no cracks and non-sticking. FT-IR analysis showed that R. pulchium anthocyanins was embedded in the film formed by gum acacia and whey protein. TG analysis showed that the quality of anthocyanins decreased significantly at 197.7℃. Comparatively, the significant mass loss of anthocyanin microcapsules could be found only at 237.5℃. The storage stability analysis showed that the retention rate of R. pulchium flowers anthocyanin microcapsules was significantly higher than that of unembedded anthocyanins owing to the influence of light and temperature.

Key words: Rhododendron×pulchrum Sweet, anthocyanin, microencapsulation, response surface methodology, stability

CLC Number:

TQ35
TQ91

Mei ZHANG, Yanjie ZHANG, Weijian CHEN, Huafang JING, Benyong LOU. Preparation of Rhododendron×pulchrum Sweet Flowers Anthocyanins Microcapsule and Its Stability[J]. Chemistry and Industry of Forest Products, 2023, 43(2): 19-26.

Figures/Tables 8

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References 18

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试验号 No.	X₁ 壁芯比(g/g) wall-core ratio	X₂ 进风口温度/℃ inlet air temperature	X₃ 进料流量/(mL·h^-1) feed flow rate	Y 包埋率/% embedding rate
1	4∶1	165	450	90.51
2	5∶1	180	450	86.43
3	3∶1	165	350	84.72
4	4∶1	180	350	88.14
5	4∶1	180	550	86.57
6	5∶1	165	350	85.24
7	4∶1	150	550	86.56
8	3∶1	165	550	83.32
9	4∶1	150	350	87.21
10	3∶1	180	450	85.36
11	3∶1	150	450	84.62
12	4∶1	165	450	91.63
13	4∶1	165	450	90.51
14	4∶1	165	450	91.32
15	4∶1	165	450	90.94
16	5∶1	150	450	86.36
17	5∶1	165	550	85.86

方差来源source	平方和sum of squares	自由度d_f	均方mean square	F值F valur	P值P value	显著性significance
模型model	110.63	9	12.29	68.80	< 0.000 1	**
X₁	4.31	1	4.31	24.11	0.001 7	**
X₂	0.38	1	0.38	2.14	0.186 7
X₃	1.13	1	1.13	6.30	0.040 4	*
X₁X₂	0.11	1	0.11	0.63	0.454 1
X₁X₃	1.02	1	1.02	5.71	0.048 2	*
X₂X₃	0.21	1	0.21	1.18	0.312 5
X₁²	61.19	1	61.19	342.51	< 0.000 1	**
X₂²	9.19	1	9.19	51.43	0.000 2	**
X₃²	23.95	1	23.95	134.03	< 0.000 1	**
残差residual	1.25	7	0.18
失拟项lack of fit	0.27	3	0.090	0.37	0.782 7
纯误差pure error	0.98	4	0.25
总误差total error	111.88	16

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Preparation of Rhododendron×pulchrum Sweet Flowers Anthocyanins Microcapsule and Its Stability

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