钛白表面不同铝膜制备及其性能研究

吴健春; 路瑞芳; 刘婵; 程晓哲

doi:10.7513/j.issn.1004-7638.2021.02.012

钛白表面不同铝膜制备及其性能研究

doi: 10.7513/j.issn.1004-7638.2021.02.012

攀钢集团研究院有限公司，钒钛资源综合利用国家重点实验室，四川攀枝花 617000

详细信息

作者简介:
吴健春(1978—)，男，四川简阳人，主要从事硫酸法钛白的工艺开发及纳米二氧化钛制备与应用研究，E-mail：wujianchun@126.com

通讯作者:
程晓哲，E-mail：chengxz6@126.com

中图分类号: TF823, TQ621
计量
- 文章访问数: 393
- HTML全文浏览量: 76
- PDF下载量: 24
- 被引次数: 0
出版历程
- 收稿日期: 2020-12-15
- 刊出日期: 2021-04-10

Preparation and performance of different aluminum filmson titanium dioxide surface

Pangang Group Research Institute Co., Ltd., State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization, Panzhihua 617000, Sichuan, China

摘要

摘要: 以偏铝酸钠、硫酸铝、磷酸为原料在不同pH条件下制备不同铝膜钛白，采用XRD、红外光谱、热重分析、SEM、BET、ZETA电位等分析了不同铝膜的晶体结构、热稳定性、微观形貌和物理性能。结果表明：不同pH获得的水合氧化铝ZETA电位均为正值，亲水性能不佳，而磷酸铝ZETA电位为负值，具有很好的亲水性能。pH=4～5时获得的水合氧化铝为近球形的无定型结构，在200 ℃和930 ℃时失去其结合水； pH=8～9时得到的絮状勃姆石结构AlO(OH)，拥有极大的比表面积，在402 ℃失去结合水；pH=10～10.5时得到界面清晰、大小不均匀的颗粒状三羟铝石块，分别在297.5 ℃和513 ℃失去结合水。在偏铝酸钠中加入磷酸制备得到的是无定型的磷酸铝，其形貌为球形小颗粒团聚成的聚集体。所制备的铝膜在紫外区吸光度由强到弱的顺序是无定型水合氧化铝＞磷酸铝＞三水铝石＞勃姆石型水合氧化铝。几种铝化合物包覆在二氧化钛表面均能提高其颜料性能，但水合氧化铝会降低二氧化钛的水分散性。
- 钛白 /
- 水合氧化铝 /
- 磷酸铝 /
- 热稳定性 /
- 水分散性
Abstract: Using sodium metaaluminate, aluminum sulfate and phosphoric acid as raw materials, different aluminum films were prepared at various pH values. Crystal structure, thermal stability, microstructure and physical properties of the films were analyzed by XRD, infrared spectroscopy, thermogravimetry, SEM, BET, ZETA potential. The results show that the ZETA potentials of the hydrated alumina obtained at different pH are all positive with poor hydrophilic properties, while the ZETA potential of aluminum phosphate is negative with good hydrophilic properties. The hydrated alumina obtained at pH = 4～5 has a nearly spherical amorphous structure, and it loses the bound water at 200 ℃ and 930 ℃. AlO(OH) obtained at pH = 8～9 has a flocculent boehmite structure with a large specific surface area and it loses the bound water at 402 ℃. The granular bayerite block with clear interface and uneven size distribution can be obtained at pH = 10～10.5, which loses the bound water at 297.5 ℃ and 513 ℃, respectively. Amorphous aluminum phosphate is prepared by adding phosphoric acid into sodium metaaluminate, whose morphology is an aggregate of spherical small particles. The order of absorption in the ultraviolet region from strong to weak is amorphous hydrated alumina> aluminum phosphate> gibbsite> boehmite hydrated alumina. The pigment performance of titanium dioxide can be improved by coating of these aluminum compounds on the surface of titanium dioxide, but hydrated alumina will reduce the water dispersibility of titanium dioxide.
- TiO₂ /
- hydrated alumina /
- aluminum phosphate /
- thermal stability /
- water dispersibility

HTML全文

图 1 不同铝膜的XRD图谱

Figure 1. XRD patterns of different aluminum films

下载: 全尺寸图片幻灯片

图 2 不同铝膜的FT-IR图谱

Figure 2. FT-IR spectra of different aluminum films

下载: 全尺寸图片幻灯片

图 3 不同铝膜的差热分析图谱

Figure 3. TGA and DSC curves of different aluminum films

下载: 全尺寸图片幻灯片

图 4 不同水合氧化铝和磷酸铝的SEM照片

Figure 4. SEM photographs of different hydrated alumina and aluminum phosphate

下载: 全尺寸图片幻灯片

图 5 不同铝膜的紫外可见吸收光谱

Figure 5. UV-visible absorption spectra of different aluminum films

下载: 全尺寸图片幻灯片

表 1 不同铝化合物的比表面积和孔径

Table 1. Specific surface area and pore size of different aluminum compounds

样品名称	比表面积/(m²·g⁻¹)	平均孔径/nm	孔体积/(cm³·g⁻¹)
A	47.49	2.168	0.015
B	264.12	2.196	0.097
C	19.48	2.212	0.010
D	40.86	2.163	0.014

下载: 导出CSV

表 2 不同结构铝化合物的物理性能

Table 2. Physical properties of aluminum compounds with different structures

样品名称	ZETA电位/mV	干粉L	干粉a	干粉b	吸油量(100 g计)/g	2 h沉降上清液高度/cm
A	18.6	95.08	−0.15	−0.31	51.72	10.0
B	18.3	94.98	−0.15	−0.33	109.66	14.5
C	25.1	94.67	−0.06	0.28	15.11	15
D	−36.3	95.43	−0.18	0.06	63.06	0
注：沉降高度为2%水性浆料超声10 min后放置于100 mL玻璃管中静置1 h结果。

下载: 导出CSV

表 3 不同铝膜包膜工艺得到二氧化钛样品的性能

Table 3. Properties of TiO₂ samples obtained by different aluminum film coating processes

包膜层	Jasn	TCS	L	a	b	吸油量(100 g计)/g	Zeta电位/mV	24 h沉降高度/cm
未包膜	95.24	1982	95.42	−0.74	1.87	12.08	−49.7	0
pH=4～5	95.61	2019	95.79	−0.78	1.27	16.05	14.28	14
pH=8～9	95.72	2027	95.79	−0.73	1.29	18.24	15.93	15
pH=10～10.5	95.74	2025	95.74	−0.74	1.28	16.63	15.53	12.5
磷酸铝	95.81	2037	95.86	−0.73	1.35	15.71	−41.6	0

下载: 导出CSV

参考文献(5)

[1]	（储成义. 二氧化钛表面修饰及其颜料性能研究[D]. 宁波: 中国科学院大学(中国科学院宁波材料技术与工程研究所), 2017.） Chu Chengyi. Preparation and modification of TiO₂ particles and their pigment properties[D]. Ningbo: University of Chinese Academy of Sciences (Ningbo Institute of Materials Technology & Engineering Chinese Academy of Sciences), 2017.
[2]	Wu Jianchun, Li Li, Chen Xinhong, et al. Influence of alumina formation way on titanium dioxide[J]. Iron Steel Vanadium Titanium, 2014,35(4):20−23, 31. (吴健春, 李礼, 陈新红, 等. 氧化铝包覆方式对钛白性能的影响[J]. 钢铁钒钛, 2014,35(4):20−23, 31. doi: 10.7513/j.issn.1004-7638.2014.04.004
[3]	Zhang Ruhui, Zhou Dali, Jiang Fengzhou, et al. Structure characteristics of hydrated alumina coated on titanium dioxide and its effect on water dispersibility of titanium dioxide[J]. Iron Steel Vanadium Titanium, 2016,37(3):35−40, 47. (张茹慧, 周大利, 蒋凤舟, 等. 钛白粉铝包膜的结构特性及对水分散性的影响[J]. 钢铁钒钛, 2016,37(3):35−40, 47.
[4]	Du Jianqiao, Zhong Benhe. Analysis of the aluminum ion deposition in the inorganic coating process for titanium dioxide[J]. Iron Steel Vanadium Titanium, 2017,38(2):70−74. (杜剑桥, 钟本和. 无机包膜过程中铝离子的行为规律分析[J]. 钢铁钒钛, 2017,38(2):70−74. doi: 10.7513/j.issn.1004-7638.2017.02.012
[5]	Chu Chengyi, Yan Yugang, Sun Aihua. Study on light resistance of TiO₂ / aluminum phosphate composite pigment[J]. Ningbo Chemical Industry, 2012,(4):23−30. (储成义, 晏育刚, 孙爱华. TiO₂/磷酸铝复合颜料耐光性能的研究[J]. 宁波化工, 2012,(4):23−30.