CAJ | 학술논문

采用KH550为硅烷偶联剂对纳米SiO2进行改性，对改性前后的纳米SiO2采用XRD、TEM、FTIR、NMR等表征手段研究样品的微观结构、表面羟基含量、有机/无机界面相互作用等问题。实验结果表明，纳米SiO2经过KH550的改性，亲水性减弱、亲油性增强，表面质子运动活性也随之增加，并且KH550与SiO2有相互作用存在。29 Si核的NMR谱表明，由于KH550与纳米SiO2表面的偶极相互作用，分子运动变慢，使得纳米SiO2改性后的29 Si弛豫时间比改性前明显增加。
채용KH550위규완우련제대납미SiO2진행개성，대개성전후적납미SiO2채용XRD、TEM、FTIR、NMR등표정수단연구양품적미관결구、표면간기함량、유궤/무궤계면상호작용등문제。실험결과표명，납미SiO2경과KH550적개성，친수성감약、친유성증강，표면질자운동활성야수지증가，병차KH550여SiO2유상호작용존재。29 Si핵적NMR보표명，유우KH550여납미SiO2표면적우겁상호작용，분자운동변만，사득납미SiO2개성후적29 Si이예시간비개성전명현증가。
The surface of nano-SiO2 particles was modified with silane coupling agent(3-aminopropyl triethoxysilane,KH550). X-ray diffraction(XRD),Transmission electron microscope(TEM),Fourier transform infrared spectroscop(FTIR)and Nuclear Magnetic Resonance( NMR) were adopted to characterize and analyze microstructure,surface hydroxyl content,organic-inorganic interface in-teraction of the unmodified and modified nano-SiO2 particles. The results indicated that after surface modification, hydrophilic of nano-SiO2 weakened,hydrophobic of nano-SiO2 increased, and interactions between KH550 and nano-SiO2 existed. Moreover,29 Si NMR indicated that because of the existence of dipole interactions between KH550 and nano-SiO2 ,molecular motion slowed down, and 29 Si relaxation time of KH550 modified nano-SiO2 were longer than that of nano-SiO2 .