利用紫外－ 可见分光光度计研究了聚丙烯酸铵在纳米 Ｙ Ｔ Ｚ Ｐ 上的定量吸附情况测定波长为２６０ｎｍ 分散剂的吸附量受球磨时间、溶液的酸碱性以及分散剂加入量的影响当ｐ Ｈ＝ １.０２时， 吸附属于高度亲和型吸附， 最高吸附百分数达９８ ％ 加入分散剂后， 除强酸条件下， 整个体系的ｐ Ｈ 趋近８.３ ， Ｚｅｔａ电势 在３５ ～４０ｍ Ｖ 之间在较宽的ｐ Ｈ 范围里， 体系初始的ｐ Ｈ 值对吸附情况影响较小分析产生这种现象的原因是由于聚丙烯酸铵极强的缓冲能力造成的.
The quantitative adsorption of ammonium salt of polyacrylic acid on nano-size Y-TZP powder was investigated by using UV adsorption spectrum. The adsorption of
PAA-NH4 decreases as pH increases, because the PAA-NH_4 is more negatively dissociated. When the pH is 1.02, the adsorption type belongs to high affinity. The highest
adsorption percent can reach as high as 98%. If initial pH falls in the range of 2.7 to 13.6, the pH of the supernate is near to 8.3 and their Zeta potential
is in the range of --35 to --40mV. In a wide pH range the adsorption ability is less effected by the initial pH, due to the high buffer ability of PAA-NH4.
参考文献
| [1] | Napper D H. Polymeric Stabilization of Colloidal Dispersions, Academic Press, London, U.K., 1983. 52--93 2 Pugh R J, Bergstrom L. Surface and Colloidal Chemistry in Advanced Ceramic Processing, Surfactant Science Series, Vol.51, Marcel Dekker, New York, 1994. 245--277 3 Guo L C, Zhang Y, Uchida N, et al. J. Europ. Ceram. Soc., 1997, 17: 345--350 4 Hshiba M, Sakurada O, Itho M, et al. J. Mater. Sci., 1993, 28: 4456--4460 5 Bergstrom L. J. Am. Ceram. Soc., 1997, 80 (2): 291--300 6 Assmann S, Eisele U, Boder H. J. Europ. Ceram. Soc., 1997, 17: 309--317 7 Hidber P C, Graule T J, Gauckler L J. J. Am. Ceram. Soc., 1996, 79 (7): 1857--1867 8 Dupont L, Fossy A, Mercier R, et al. J. Coll. Inter. Sci., 1993, 161: 455--464 9 Chou K S, Lee L J. J. Am. Ceram. Soc., 1989, 72 (9): 1622--1627 10 CesaranoIII J, Aksay I A. J. Am. Ceram. Soc., 1988, 71 (4): 250--255 11CesaranoIII J, Aksay I A. J. Am. Ceram. Soc., 1988, 71 (12): 1062--1067 |
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