CAJ | 학술논문

文章采用有机包覆法对纳米TiO_2进行表面改性,制备了2,4-甲苯二异氰酸酯(TDI)/TiO_2纳米杂化材料.采用红外光谱(FT-IR)、热质量损失分析(TGA)、静态接触角(CA)、透射电镜(TEM)及分散性实验等手段对纳米TiO_2和TDI/TiO_2纳米杂化粒子进行分析和表征.红外光谱和热质量损失分析显示,TDI以物理吸附和化学键合的方式存在于纳米TiO_2的表面,并形成了有机包覆层.经计算,每nm~2约有4.0个羟基参与化学反应,化学包覆率达57.97%.静态接触角数值表明,TDI/TiO_2纳米杂化粒子具有很强的疏水性能,与水的接触角达147°.分散性实验显示,TDI/TiO_2纳米杂化粒子在基础润滑油中分散稳定,静置20 d未出现分层现象.
문장채용유궤포복법대납미TiO_2진행표면개성,제비료2,4-갑분이이청산지(TDI)/TiO_2납미잡화재료.채용홍외광보(FT-IR)、열질량손실분석(TGA)、정태접촉각(CA)、투사전경(TEM)급분산성실험등수단대납미TiO_2화TDI/TiO_2납미잡화입자진행분석화표정.홍외광보화열질량손실분석현시,TDI이물리흡부화화학건합적방식존재우납미TiO_2적표면,병형성료유궤포복층.경계산,매nm~2약유4.0개간기삼여화학반응,화학포복솔체57.97%.정태접촉각수치표명,TDI/TiO_2납미잡화입자구유흔강적소수성능,여수적접촉각체147°.분산성실험현시,TDI/TiO_2납미잡화입자재기출윤활유중분산은정,정치20 d미출현분층현상.
The surface of TiO_2 nanoparticles was modified with organic coating method, and the toluene-2,4-diisocyanate (TDI)/TiO_2 nano-hybrid composite was successfully fabricated. TiO_2 nanoparticles and TDI/TiO_2 nano-hybrid composite were characterized by infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), contact angle measurement (CA), transmission electron microscopy (TEM) as well as dispensibility experiment. FT-IR spectra and TGA results show that TDI exists on the surface of TiO_2 in forms of physical adsorption and chemical bonding, and an organic coating layer is formed. The calculated numbers of reacted -OH for surface density is about 4.0 per nm~2, and the chemical coating efficiency is 57.97%. The contact angle value shows TiO_2 nanoparticles are remarkably changed from performance hydrophilic to hydrophobic because of the modification. The contact angle value of TDI/TiO_2 nano-hybrid composite against water reaches as high as 147°. TDI/TiO_2 nano-hybrid composite can well disperse in lubricant oil for at least 20 d in terms of the dispersibility experiment.