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首页> 外文期刊>Applied Nanoscience >Synthesis, characterization and application of TiO2 nanopowders as special paper coating pigment
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Synthesis, characterization and application of TiO2 nanopowders as special paper coating pigment

机译：TiO2纳米粉体专用纸涂料颜料的合成，表征及应用

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TiO2 nanopigments in two pure crystallographic forms (anatase and rutile) have been synthesized successfully by two methods; hydrothermal and hydrolysis. The produced pigments from the two methods were investigated physicochemically by several analyses tools. Then they were applied in paper coating mixtures and their influence on coated paper properties was systematically investigated. XRD and FTIR investigations showed that the prepared pigments using hydrothermal method at 100 and 120?°C were a mixture of anatase and brookite and pure anatase, respectively, whereas hydrolysis method produced pure rutile phase pigment. TEM investigation showed that the crystallite size of anatase, mixture of anatase and brookite and rutile samples are 6.2, 11.7, and 9.2?nm, respectively. BET studies proved that anatase pigment has 140.74?m2/g, 0.237?cc/g and 18.33??, whereas rutile has 60.621?m2/g, 0.122?cc/g and 14.669??, surface area, pore volume and pore diameter, respectively. UV–Vis absorption and PL emission characteristics of the prepared pigments showed that the energy gaps for anatase, mixture of anatase and brookite and rutile are 3.36, 3.30 and 3.37?eV, respectively. The addition of the prepared nanopigments in conjugation with clay in coating mixture increased both brightness and opacity of the coated papers. The greatest effect was obtained upon using rutile nanopigment. Also there was a significant decrease in coated paper roughness while the air permeance started to decrease then increased at 50?% addition levels. In all coated paper, rutile pigment showed the highest enhancement effect on coated paper properties.
机译：通过两种方法成功合成了两种纯晶体形式（锐钛矿和金红石）的TiO 2 纳米颜料。水热和水解。通过几种分析工具对这两种方法生产的颜料进行了物理化学研究。然后将它们应用于纸张涂料混合物中，并系统地研究了它们对涂料纸张性能的影响。 XRD和FTIR研究表明，在100和120°C下用水热法制备的颜料分别是锐钛矿和板钛矿和纯锐钛矿的混合物，而水解法则生产纯金红石相颜料。 TEM研究表明，锐钛矿，锐钛矿和板钛矿的混合物以及金红石样品的微晶尺寸分别为6.2、11.7和9.2？nm。 BET研究证明，锐钛矿型颜料的色度为140.74？m 2 /g、0.237?cc/g和18.33 ??，而金红石型的颜料为60.621？m 2 / g，表面积，孔体积和孔径分别为0.122？cc / g和14.669 ??。所制备颜料的UV-Vis吸收和PL发射特性表明，锐钛矿，锐钛矿和板钛矿的混合物以及金红石的能隙分别为3.36、3.30和3.37？eV。与涂料混合物中的粘土缀合的制备的纳米颜料的添加增加了涂料纸的亮度和不透明度。使用金红石型纳米颜料可获得最大的效果。涂布纸的粗糙度也明显降低，而空气渗透率开始下降，然后在添加量为50％时增加。在所有涂布纸中，金红石颜料对涂布纸性能显示出最高的增强效果。

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