CAJ | 학술논문

利用“Stober”法制备纳米SiO2（ nano silica，NS），并通过阴离子开环聚合法在其表面原位接枝聚环氧丙醇，采用红外光谱、X射线光电子能谱、热重分析、扫描电镜对样品进行表征，同时对比研究了接枝前后纳米SiO2对聚氨酯泡沫的泡孔结构和压缩性能的影响规律，并得到了最佳配比。结果表明，成功接枝聚环氧丙醇的纳米SiO2仍呈规则球形，粒径约为120 nm，接枝质量分数为6%；接枝后纳米SiO2复合聚氨酯泡沫的泡孔结构得到优化，孔径相对减小，低填充量时力学性能提升显著，当填充量为0.5 php时，比强度提高约1.81（MPa·cm3·g-1），压缩模量提高约52 MPa。
이용“Stober”법제비납미SiO2（ nano silica，NS），병통과음리자개배취합법재기표면원위접지취배양병순，채용홍외광보、X사선광전자능보、열중분석、소묘전경대양품진행표정，동시대비연구료접지전후납미SiO2대취안지포말적포공결구화압축성능적영향규률，병득도료최가배비。결과표명，성공접지취배양병순적납미SiO2잉정규칙구형，립경약위120 nm，접지질량분수위6%；접지후납미SiO2복합취안지포말적포공결구득도우화，공경상대감소，저전충량시역학성능제승현저，당전충량위0.5 php시，비강도제고약1.81（MPa·cm3·g-1），압축모량제고약52 MPa。
The SiO2(Nano Silica(NS))particles were synthesized by the way of“Stober”and grafted with polyglycidol on its surface using anionic ring-opening polymerization. The samples were character-ized by Fourier Transfer Infrared Spectroscopy( FTIR),X-ray Photoelectron Spectra( XPS),Thermo Gravimetric Analysis( TGA ) and Scanning Electron Microscopy( SEM ). Moreover,the influence of polyglycidol-NS and pristine NS on the morphology and mechanical properties of PUF were studied. Then the optimal proportion was obtained. The results show that the shape of NS particles after successful-ly grafting is spherical with a diameter of 120 nm. The grafting ratio of polyglycidol was about 6%. PUF filled with NS particles after grafting decreased in cell size,which performed better in morphology. And its mechanical properties improved significantly at low contents. The specific strength and compressive modulus of PUF filled with NS particles after grafting were improved of 1. 81(MPa·cm3·g-1)and 52 MPa at 0. 5 php,respectively.