为了改善玉米醇溶蛋白在复合材料加工中的流变特性,研究了辐照剂量、温度、剪切速率对玉米醇溶蛋白流变性的影响.结果表明,玉米醇溶蛋白经辐照处理后具有假塑性流体特性,呈现"剪切变稀"现象.辐照剂量、剪切温度和剪切速率对玉米醇溶蛋白的流变性有显著影响.随着辐照剂量增加,溶液黏度呈现先增加后减小的趋势,当辐照剂量为10kGy时,黏度最高;随着剪切温度的增加,溶液黏度呈现先下降后增加的趋势,当温度为308K时,黏度最低;随剪切速率的增加,溶液的黏度降低,但当剪切速率接近100s-1时,黏度变化不明显.%Effect of γ-irradiation on improving zein’s characteristics was studied in order to investigate the performance of zein as a polymer matrix in composites. This aim has been achieved by irradiating zein powder with Co60 gamma ray at the doses of 5, 10, 15, 20 and 25kGy. Results indicated that the zein solutions produced by irradiated powder showed pseudoplastic fluid characteristic with shear thinning phenomenon. The irradiation dose, shear temperature and shear rate had remarkable effects on the rheological properties of zein. The viscosity of solution showed a-n ascending-descending trend with increasing the radiation dose. The radiation dose of the highest viscosity was found at 10kGy. Meanwhile the increase of temperature resulted in an initial decrease following by a further increase in the viscosity of irradiation modified zein solution. The shear temperature of the lowest viscosity was found at 308K. With increasing the shear rate, the viscosity of solution decreased, and reached a plateau when the shear rate was close to 100s-1.
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