首页> 外文期刊>Journal of Polymers and the Environment >Preparation, Characterization, and Antioxidant Activity of β-Carotene Impregnated Polyurethane Based on Epoxidized Soybean Oil and Malic Acid
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Preparation, Characterization, and Antioxidant Activity of β-Carotene Impregnated Polyurethane Based on Epoxidized Soybean Oil and Malic Acid

机译:基于环氧化大豆油和苹果酸的β-胡萝卜素浸渍聚氨酯的制备,表征和抗氧化活性

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摘要

A new polyol was synthesized based on epoxidized soybean oil (ESO) and malic acid (MA) for the formulation of a bio-based polyurethane. The synthesized polyol was characterized by Fourier transform-infrared spectroscopy, nuclear magnetic resonance spectroscopy, and mass spectrometry. Polyurethanes were formed by reacting the synthesized ESO-MA polyol with 1,6-hexamethylene diisocyanate at different isocyanate/hydroxyl ratios. The tensile and thermal properties of the prepared polyurethanes were analyzed by differential scanning calorimetry, thermogravimetric analysis, and universal testing machine. The polyurethanes exhibited a tensile strength of 1.34-5.56MPa, an elongation at break of 20-41%, and a glass transition temperature of -2.7 to 0.6 degrees C. In addition, beta-carotene, a natural antioxidant, was impregnated on the polyurethane surface and its effect on the tensile and thermal properties of polyurethane was investigated. An increase in tensile strength and a reduction in elongation at break were observed in these beta-carotene impregnated polyurethane films. They also showed up to 61% radical scavenging activity against 2,2-diphenyl-1-picryhydrazyl radical in methanol. Moreover, these films retained radical scavenging activity for more than 50days.
机译:基于环氧化大豆油(ESO)和苹果酸(MA)合成了一种新的多元醇,用于制剂生物基聚氨酯。合成的多元醇的特征在于傅里叶变换 - 红外光谱,核磁共振光谱和质谱。通过在不同的异氰酸酯/羟基比以不同的异氰酸酯/羟基比使合成的ESO-MA多元醇与1,6-六亚甲基二异氰酸酯反应来形成聚氨酯。通过差示扫描量热法,热重分析和通用试验机分析制备的聚氨酯的拉伸和热性能。聚氨酯表现出1.34-5.56MPa的拉伸强度,突破20-41%的伸长率,玻璃化转变温度为-2.7至0.6℃。此外,β-胡萝卜素是天然抗氧化剂浸渍在研究了聚氨酯表面及其对聚氨酯的拉伸和热性质的影响。在这些β-胡萝卜素浸渍的聚氨酯薄膜中观察到拉伸强度的增加和伸长率的降低。它们还显示出甲醇中的2,2-二苯基-1- Picrydhydy酰基的61%的激进清除活性。此外,这些薄膜保留了5000多天的自由基清除活性。

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