【摘要】 为改善纳米ZnO在油相有机介质中的分散性,采用异丙基三(二辛基焦磷酸酰氧基)钛酸酯(NDZ201)对纳米ZnO进行改性。采用扫描电镜(SEM)对改性后纳米ZnO的形貌进行表征,利用红外光谱仪(FTIR)对改性后纳米ZnO的结构进行表征,通过紫外-可见分光光度计(UV-Vis)及接触角测试仪(CA)等对改性后纳米ZnO的性能进行测试。结果表明:NDZ201成功对纳米ZnO进行表面改性,改性后纳米粒子的分散性得到改善,且粒子表面疏水化程度提高,亲油化度增加,紫外吸收强度增大。将NDZ201改性后纳米ZnO引入氢化蓖麻油中,制备纳米ZnO/改性氢化蓖麻油复合材料,并将该复合材料应用于皮革纤维中。纳米ZnO/改性氢化蓖麻油复合材料的乳胶粒呈球形;纳米ZnO与改性氢化蓖麻油具有抗紫外协同效应;与改性氢化蓖麻油相比,复合材料应用后皮革纤维具有更好的耐黄变性能。更多还原

【Abstract】 In order to improve the dispersibility of ZnO nanoparticles in the organic phase,isopropyl tri(dioctyl pyrophosphate acyloxy)titanate(NDZ201)was used to modify ZnO nanoparticles.Scanning electron microscopy(SEM)was used to characterize the morphology of the nano-ZnO after modification,Fourier transform infrared spectrometer(FTIR spectrometer)was used for investigating the chemical structure of the modified nano-ZnO,and ultraviolet-visible spectrophotometer(UV-Vis)and contact angle tester(CA)were used in detecting the properties of the modified nano-ZnO.The results show that ZnO nanoparticles are modified successfully by NDZ201,the dispersibility of which is improved after modification.What’s more,the hydrophobicity of the particle is improved significantly and the lipophilic degree together with UV absorption increase.Afterwards,NDZ201 modified ZnO nanoparticles are introduced into hydrogenated castor oil to prepare nano-ZnO/modified hydrogenated castor oil composites,and then the composites are applied to leather fiber.It is found that the latex particles of nano-ZnO/modified hydrogenated castor oil composites are spherical.ZnO nanoparticles and modified hydrogenated castor oil exhibit synergistic effect in UV-shielding.Moreover,the antiyellowing property of leather sample treated with the composites is superior to that of which treated with the pure modified hydrogenated castor oil under the same test condition.更多还原