改性氢化蓖麻油/KH550-TiO_2复合材料的制备及性能

The preparation and properties of modified hydrogenated castor oil/KH550-TiO_2 nanocomposites

以硅烷偶联剂KH550 为改性剂对纳米TiO2进行改性,制得KH550改性纳米TiO2（KH550-TiO2）,然后以其与氢化蓖麻油为原料,通过原位法制得了改性氢化蓖麻油/KH550改性TiO2纳米复合材料（SSF/KH550-TiO2）,再将其应用于山羊皮服装革的加脂工序中.采用X 射线衍射（XRD）、红外（FT-IR）及热重（TGA）对KH550-TiO2进行表征,采用FTGIR、动态激光散射（DLS）、透射电镜（TEM）和紫外分光光度计（UV）对SSF/KH550-TiO2 进行表征,并且对应用后革样的耐黄变性能、机械性能、增厚率及柔软度进行检测,同时也通过扫描电子显微镜（SEM）对胶原纤维进行观察.XRD、FTGIR 和TGA 检测结果表明,硅烷偶联剂能够成功地对纳米TiO2进行改性,并且不改变TiO2 晶型结构,其包覆率在2.27% -2.72%.DLS、UV 和TEM 检测结果表明,KH550-TiO2的引入,不仅能够明显降低SSF/KH550-TiO2的粒径,也能提高SSF/KH550-TiO2的紫外吸收性能,并且KH550-TiO2 均匀地分散在SSF/KH550-TiO2 中.革样性能表明,KH550-TiO2 的引入对革样的机械性能影响不明显,但耐黄变、增后率及柔软度明显增加,并随着KH550-TiO2 引入量的增加而增加.SEM 检测结果表明,KH550-TiO2能够渗透到胶原纤维之间.

Modified TiO2(KH550-TiO2)was prepared byγ-ammonia propyl triethoxysilane and TiO2.Hydrogenated castor oil and modified titanium synthesizedhydrogenated castor oil/γ-ammonia propyl triethoxysilane modifiedtitanium nanocomposites(SSF/KH550-TiO2)by in-situ method.Finally SSF/KH550-TiO2 was applied in fatliquoring of goatskin garment and properties of the fatliquored leather were tested.KH550-TiO2 was characterized by X-ray diffraction(XRD),fourier transform infrared spectroscopy(FT-IR)and thermogravimetric analysis(TGA).dynamic SSF/KH550-TiO2 was characterized by FT-IR,dynamic laser scattering(DLS),UV spectrophotometer(UV)and transmission electron microscope(TEM).Mechanical properties,flexibility and anti yellowing properties of the fatliquored leather were tested,meanwhile fibers were observed by scanning electron microscope(SEM).The XRD,TGA and FT-IR results showed that KH550 could successfully modify TiO2,crystal form of modified TiO2 did not change and KH550 coating rate was 2.27%-2.72% on TiO2 surface.DLS,UV and TEM results showed emulsion particle diameter SSF/KH550-TiO2 was obviously decrease and ultraviolet absorption was obviously heighten,after KH550-TiO2 was introduced.Meanwhile KH550-TiO2 could evenly distribute in the SSF/KH550-TiO2.Crust leather results indicated that anti yellowing,softness and thickening were improved with KH550-TiO2 increased.However,mechanical propertythe fatliquored leather was reduced.SEM results indicated that KH550-TiO2 cloud enters among collagen fibers.