玉米秸秆木聚糖的硫酸化修饰及抗氧化活性研究

doi:10.3969/j.issn.1001-1803.2022.09.009

Abstract

Abstract:

Cornstalk was used as raw material, from which cornstalk xylan was obtained by alkaline extraction and alcohol precipitation. Then a sulfated cornstalk xylan was synthesized by three sulfating methods （chlorosulfuric acid-pyridine method, sulfur trioxide-pyridine method and sodium sulfamate method）. The structure of sulfated cornstalk xylan were characterized by IR and ¹³C NMR, and its antioxidant activity in vitro was further investigated. Structural characterization revealed that sulfate groups were successfully grafted onto cornstalk xylan. The results indicated that, the optimal conditions for sulfating were sodium sulfamate method at a reaction temperature of 45 ℃ for a sulfating time of 2.5 h. The degree of substitution （DS） of the sulfated cornstalk xylan thus obtained was 1.566. The results of in vitro antioxidant activities showed that, sulfated cornstalk xylan had scavenging ability on hydroxyl radicals in a dose-dependent manner, and sulfation could improve the antioxidant activity of cornstalk xylan.

Key words: corn straw, xylan sulfate, antioxidant, synthesis

CLC Number:

TQ658

Mi Haoyu,Liu Wanyi,Duan Hongyu,Zhang Tianchun,Han Luping. Study on the synthesis and antioxidant activities of a sulfated cornstalk xylan[J].China Surfactant Detergent & Cosmetics, 2022, 52(9): 975-980.

Figures/Tables 11

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References 9

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酯化体系	OD₁	OD₂	吸光度值（OD₁-OD₂）	ρ （SO₄^2-） / （μg/mL）	w （SO₄^2-） /%	DS
C₅H₅NSO₃/C₅H₅N	0.018	-0.015	0.033	14.421	13.261	0.233
ClSO₃H/C₅H₅N	0.095	-0.011	0.106	52.842	48.590	1.276
氨基三磺酸钠	0.104	-0.010	0.114	57.053	52.462	1.566

组别	ρ （样品） / （mg/mL）	清除率/%
维生素C	0.25	8.69
	0.1	40.30
	0.3	71.23
	0.5	82.43
	1.0	91.24
玉米秸秆木聚糖	0.25	7.26
	0.1	13.41
	0.3	21.24
	0.5	31.25
	1.0	35.78
木聚糖硫酸酯（氨基三磺酸钠法）	0.025	8.12
	0.1	32.24
	0.3	43.37
	0.5	51.35
	1.0	63.28

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Study on the synthesis and antioxidant activities of a sulfated cornstalk xylan

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