纳米ATO粉体在改性塑料中的应用

研究了用钛酸酯偶联剂对纳米ATO粉体进行表面改性,再用适当的分散剂将其很好地分散在聚乙烯树脂中,以之制成色母粒,吹制成塑料膜。该塑料膜具有良好的隔热保温性能,可广泛应用于冬季生产蔬菜的塑料大棚。塑料膜隔热性能测试表明:纳米ATO粉体含量达5%时,隔热效果最好;粉体含量大于5%时,由于粉体粒径增大,隔热性能变差。     

纳米粉体表面改性技术及应用

纳米粒子易严重团聚 ,为了有效使用纳米粉体 ,纳米粉体表面改性成为纳米粉体研究的重要内容。文中论述了纳米粒子的表面改性机理、表面改性剂、表面改性方法和改性的应用。     

水性丙烯酸酯涂料改性的研究进展

介绍了环氧树脂改性水性丙烯酸涂料、有机氟改性水性丙烯酸涂料、聚氨酯改性水性丙烯酸涂料、有机硅改性水性丙烯酸涂料及外加纳米助剂改性水性丙烯酸涂料的研究进展,经过改性水性丙烯酸树脂涂料能够获得优良的综合性能,提高了水性丙烯酸树脂涂料的使用性能,扩大了水性丙烯酸树脂涂料的推广应用范围。提出了当前水性丙烯酸改性研究存在的难题,指出将来水性丙烯酸涂料的研究应朝着多功能、高性能、多样化和绿色化方向发展。     

纳米ATO在有机单体介质中的表面改性及分散研究

选用了多种改性剂,用超声波为分散手段,将纳米ATO粉体在有机单体介质中进行表面改性和分散,研究了改性剂种类、改性剂用量、改性时间、超声波输出功率和超声波处理时间等对纳米ATO-单体分散液稳定性的影响,探讨了纳米ATO表面改性机理.结果表明,硅烷偶联剂KH-570是纳米ATO的最佳改性剂,当其用量为纳米ATO的15%(质量分数),改性时间为24h,超声波输出功率为90%,超声波处理时间为12min时,纳米ATO-单体分散液具有最佳的分散稳定性.KH-570主要通过在纳米ATO表面水解产生硅羟基的自缩合,形成包覆改性.     

纳米ATO粉体的表面改性研究

采用偶联剂对纳米ATO(氧化锡锑)粉体进行表面改性,综合考察了偶联剂的品种与用量、反应时间及反应温度对表面改性效果的影响,从而确定最佳表面改性条件.利用红外光谱(FTIR)、热重分析(TGA)以及光吸收率等表征手段来研究表面改性的效果及分散状况.结果表明,纳米ATO粉体表面改性的最佳条件为:选用硅烷偶联剂KH570,添加量为2份,反应水浴温度为80℃,反应5h.     

水性聚氨酯的改性研究进展EI

水性聚氨酯在胶粘剂及涂料行业中有很好的发展前景。但由于分子中引入了亲水性基团,水性聚氨酯在耐水性、耐溶剂性、耐候性等方面表现较差,需不断对其进行改性研究。文中综述了近年来国内外对水性聚氨酯的一些改性情况,如纳米改性、生物改性、有机氟改性等,并对水性聚氨酯的改性发展方向进行了展望。     

水性聚氨酯的改性研究进展

水性聚氨酯在胶粘剂及涂料行业中有很好的发展前景。但由于分子中引入了亲水性基团,水性聚氨酯在耐水性、耐溶剂性、耐候性等方面表现较差,需不断对其进行改性研究。文中综述了近年来国内外对水性聚氨酯的一些改性情况,如纳米改性、生物改性、有机氟改性等,并对水性聚氨酯的改性发展方向进行了展望。     

纳米级多孔SiO2的分散及在水性涂料中的应用

通过对纳米级多孔SiO2在水性介质中的分散试验，解决了纳米SiO2在水性介质的团聚问题，并研究了各因素对纳米SiO2水悬浮液稳定性的影响，通过正交实验筛选出了最佳的分散工艺。将分散后的纳米SiO2浆料加入到普通的水性苯丙乳液涂料中，加入各种助剂配制出了性能优异的水性纳米SiO2涂料，最后对所配制的涂料的性能进行了测试。     

纳米二氧化钛表面化学改性及在涂料中的应用

探讨了一种有效的纳米二氧化钛表面化学改性的方法，对改性后的二氧化钛各项性能进行了测试，并将其应用于环氧树脂涂料中，和常规二氧化钛以及未经改性的纳米二氧化钛进行了比较，发现其能显提高涂料的耐盐雾性、抗冲击性、耐划痕性和柔韧性等。     

改性聚氨酯涂料的研究进展

综述了国内外利用丙烯酸酯、环氧树脂、有机硅、纳米粒子等对聚氨酯树脂改性在涂料中的应用进展;对近期聚氨酯涂料的改性作了重点描述,展望了改性聚氨酯涂料的研究方向及应用前景.     

ATO/APU纳米复合透明隔热涂料的制备与性能研究

以纳米氧化锡锑(ATO)水性浆料为隔热材料,水性聚氨酯树脂(APU)为成膜物质制备出ATO/APU纳米复合透明隔热涂料。对悬浮ATO粒子的分散稳定性,ATO/APU复合涂膜的物理性能,可见光-近红外透射光谱透过率,隔热性能进行研究。结果表明,纳米ATO粉体通过偶联剂KH-550改性后,与APU复合制得了分散稳定的纳米复合涂料;ATO/APU复合涂料不仅具有良好的成膜性能,而且在保持可见光透过率83.0%时,红外阻隔率达到70%,隔热后温差能保持在6℃左右,复合涂料具有良好的隔热性能。     

Inkjet-printing of antimony-doped tin oxide (ATO) films for transparent conducting electrodes

Antimony-doped Tin oxide (ATO) films have been prepared by inkjet-printing method using ATO nanoparticle inks. The electrical and optical properties of the ATO films were investigated in order to understand the effects of rapid thermal annealing (RTA) temperatures. The decrease in the sheet resistance and resistivity of the inkjet-printed ATO films was observed as the annealing temperature increased. The film annealed at 700 degrees C showed the sheet resistance of 1.7 x 10(3) Omega/sq with the film thickness of 350 nm. The optical transmittance of the films remained constant regardless of their annealing temperatures. In order to further reduce the sheet resistance of the films as well as the annealing temperature, Ag-grid was printed in between two layers of inkjet-printed ATO. With 1.5 mm Ag line spacing, the Ag-grid embedded ATO film showed the sheet resistance of 25.6 Omega/sq after RTA at 300 degrees C.     

Synthesis and characterization of antimony-doped tin oxide (ATO) with nanometer-sized particles and their conductivities

This study focused on finding the optimum conditions for displaying higher conductivity in an ATO-PET film prepared using the solvothermal method. The conductivity of the ATO film with Sb1.5:Sn8.5 increased to 800 °C calcinations. It did not, however, increase further even though the calcinations were at a temperature above 1000 °C. The average grain size measured from the FESEM micrographs was distributed within a 5.0-nm (at 400 °C) to 50.0-nm (at 1000 °C) range. It was determined from the XRD results that the special peaks assigned to the SnO₂ tetragonal type dominated until 1000 °C in the ATO particles with Sb1.5:Sn8.5. It was also confirmed that the hydrophilicity (the T–OH/T–O ratio was larger) of the ATO nano-particle with Sb1.5:Sn8.5 was largest at 600 °C calcinations. Its binding energy remarkably increased at 1000 °C calcination. In various Sb:Sn mole ratios, the conductivity was at its best in ATO films (for Sb1.5:Sn8.5) with 600 °C calcinations, 9.0×10⁵ (Ω/□). When 1,4-butanediol was used as a solvent, the conductivity of the ATO film was enhanced and the ATO film exhibited higher distribution than the other solvents did. The conductivity of the ATO film prepared in basic conditions (pH=10.0) was enhanced compared to those in acidic conditions.     

透明隔热纳米涂料的研究进展

本文就透明隔热纳米涂料的国内外研究进展、纳米材料的选材、隔热机理及制备方法进行综述,并就其现存的问题和未来的发展进行了展望。     

硅氧烷改性WPU/ATO复合分散体的制备与性能

将合成的水性聚氨酯(WPU)与纳米氧化锡锑(ATO)复合,得到了功能性WPU/ATO复合分散体,研究了γ-缩水甘油醚氧丙基三甲氧基硅烷(KH560)的交联反应及其对薄膜性能的影响。FT-IR结果确认了KH560硅醇间的缩合反应,以及KH560的环氧基与WPU中羧基之间的酯化反应。缩合和酯化等反应实现了功能性薄膜的后交联,既显著改善了薄膜的附着力、硬度和耐水性,又保障了良好的透过率和隔热效果。当KH560用量为3.0%(质量分数),ATO用量为7.0%(质量分数)时,薄膜附着力为0级,硬度达2H,吸水率为10.7%,可见光透过率为70.1%,红外屏蔽率达到66.5%,薄膜满足了透明和隔热的双重要求。     

氧化铝粉体表面纳米化修饰及其在耐磨涂层中的应用

在低温条件(80℃)下,以钛酸丁酯为原料,利用胶溶–回流法在氧化铝粉体表面制备了纳米TiO2颗粒.通过扫描电镜、X射线衍射、X光电子能谱仪、BET等检测手段对复合颗粒的表面形貌、包覆层相组成、比表面积等进行了表征.结果表明,纳米TiO2颗粒在微粉表面形成纳米薄膜修饰层,包覆层主要为锐钛矿型相,表面纳米化修饰后氧化铝粉体表面的粗糙度显著增加,比表面积较包覆前提高了30倍以上.将经表面纳米化修饰后的微粉应用于以有机硅改性环氧树脂为基体的耐磨涂层中,其磨损失重仅为包覆前复合耐磨涂层的55%,耐磨性显著提高,并初步讨论了复合耐磨涂层的摩擦磨损性能.     

Sb掺杂SnO2（ATO）的制备及表面电荷对粉体导电性影响

以Na2SnO3.5H2O和Sb2O3为锡锑源,HNO3为沉淀剂,采用共沉淀法制备了结晶性良好,颗粒尺寸为7～10nm的Sb掺杂SnO2(ATO)纳米颗粒。借助XRD、TEM、EDS、粉体电阻率测试仪、zeta电位测试仪等研究了合成体系pH值、洗涤方式、表面活性剂、煅烧温度等因素对ATO性能的影响。结果表明,体系pH值对粉体颗粒尺寸和电导率影响显著。优选条件下,控制合成体系pH值为3,并经800℃煅烧所得ATO的晶粒尺寸约为8nm,电阻率为0.444Ω·cm。     

Preparation and properties of UV-curable polymer/nanosized indium-doped tin oxide (ITO) nanocomposite coatings

UV-curable polymer/nanosized indium-doped tin oxide (ITO) nanocomposite coatings were fabricated by blending ITO slurry and oligomer and reactive monomers. The preparation of ITO slurry and the effect of the ITO content on the electrical conductivity, hardness and optical properties of the nanocomposite coats were investigated. It was found that the electric conductivity and UV absorbance of the nanocomposite coats increased while the hardness and refractive index first increased then decreased with increasing ITO concentration since too high ITO resulted in the incomplete curing of the coatings.