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目的:以柠檬皮渣为原料制备膳食纤维(DF),探讨原料预处理工艺和干燥方式对柠檬皮渣膳食纤维成分及其抗氧化特性指标的影响。方法:分析不同工艺条件下制备的膳食纤维中总膳食纤维(TDF)、可溶性膳食纤维(SDF)、不溶性膳食纤维含量(IDF)和总黄酮、Vc含量,以此作为评价指标。结果表明,干燥前对原料进行热烫可制备SDF含量较高的柠檬膳食纤维,冷冻干燥可较大程度保存原料的总黄酮、Vc和SDF,原料不经预处理直接冷冻干燥可制备总黄酮和Vc含量高的膳食纤维。结论:原料预处理工艺和干燥方式均显著影响膳食纤维成品的组成分和抗氧化特性指标。 相似文献
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热塑性聚合物/木纤维复合材料的研究进展 总被引:29,自引:0,他引:29
介绍了国内外关于热塑性聚合物/木纤维复合材料界面改性、在加工过程中木纤维的热稳定性以及阻燃性能等方面的研究进展,界面相容剂或偶联剂能大大提高其界面相容性,特别是马来酸酐接枝热塑性聚合物作为界面相容剂更为有效。硅烷偶联剂预处理木纤维表面对提高其热稳定性有一定的作用。 相似文献
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含苯并噁唑半芳香聚酰胺的合成与表征 总被引:2,自引:0,他引:2
为了得到同时具有优良耐热性能和易加工性能的新型半芳香聚酰胺,以5-氨基-2-(对氨基苯)苯并噁唑(ABO)和己二酸基于Yamazaki磷酸化过程合成了聚己二酰对苯撑苯并噁唑二胺(BO6).研究了反应温度对聚合物分子量的影响,并通过FTIR、1H-NMR对其结构进行了表征;利用DSC、TG对其热性能进行了研究.结果表明:反应温度在90℃左右时高聚物获得了最高的粘数.该聚合物的耐热性较脂肪族聚酰胺有较大幅度的提高,同时该聚合物具有较好的耐溶剂性能. 相似文献
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In order to obtain a novel polyamide having excellent heat-resistant properties which could be anticipated as a thermal modifier for aliphatic polyamide,a series of new semi-aromatic polyamides (BO6,BO8,BO10) containing benzoxazole unit were synthesized based on 5-amino-2-(p-aminophenyl) benzoxazole (ABO) and aliphatic acids (adipic,suberic and sebacic acid) by means of Yamazaki phosphorylation method.The effect of reaction temperature on the inherent viscosity of the polymers was studied,and the structures of products were characterized by FTIR,1 H-NMR,and the heat resistance of the polymers was studied by DSC and TG.The results showed that the reaction temperature gives the polymers the highest viscosity at around 90 ℃,130 ℃ and 130 ℃ for BO6,BO8 and BO10,respectively.The heat resistance of the new semi-aromatic polyamides is much higher than that of the common aliphatic polyamides.In addition,the products show good solvent resistance and crystallization properties. 相似文献