研究了D-山梨醇(D-sorbito1)对聚丙烯酸(poly(acrylic acid)(PAA)稳定的水基氧化铝(A12O3)悬浮液流变性能的影响.实验发现:在pH为9.0时,对于固含量为30vo1%～40vo1%的Al2O3悬浮液,少量D-山梨醇的加入皆能明显提高其分散稳定性.当D-山梨醇的添加量占分散剂总量(0.5wt%)的20%时,悬浮液粘度最低.且添加二元分散剂PAA/D-山梨醇的悬浮液具有更好的抗电解质性能.分别对单一PAA分散的Al2O3及二元分散剂分散的Al2O3进行了红外光谱表征.结合流变与红外实验结果,分析了山梨醇的作用机理:部分山梨醇吸附在Al2O3颗粒表面,部分山梨醇与PAA以氢键形式结合,增大了颗粒间的空间位阻,提高了悬浮液的流变性能.
参考文献
| [1] | Lewis J A.Colloidal processing of ceramics.J.Am.Ceram.Soc.,2000,83(10):2341-2359. |
| [2] | Marco P,Labanda J,Llorens J.The effects of some polyelectrolyte chemical compositions on the rheological behaviour of kaolin sus pensions.Powder Technol.,2004,148:43-47. |
| [3] | 李登好,郭露村(LI Deng-Hao,et al).吸咐途径对a-Al2O3-H2O-PAA悬浮液流变性影响.无机材料学报(Journal of Inorganic Materials),2004,19(4):948-952. |
| [4] | Tomasik P,Schilling C H,Jankowiak R,et al.The role of organic dispersants in aqueous alumina suspensions.J.Eur.Ceram.Soc.,2003,23(6):913-919. |
| [5] | Guo L C,Zhang Y,Uchida N,et al.Adsorption effects on the theological properties of aqueous alumina suspensions with polyelectrolyte.J.Am.Ceram.Soc.,1998,81(3):549-556. |
| [6] | Binner J G P,Mcdermott A M.Rheological characterisation of ammonium polyacrylate dispersed,concentrated alumina suspensions.Ceramic International,2006,32(7):803-810. |
| [7] | Schilling C H,Sikora M,Tomasik P,et al.Rheology of aluminananoparticle suspensions:effects of lower saccharides and sugar alcohols.J.Eur.Ceram.Soc.,2002,22(6):917-921. |
| [8] | Schilling C H,Li C P,Tomasik P,et al.The rheology of alumina suspensions:influence of polysaccharides.J.Eur.Ceram.Soc.,2002,22(6):923-931. |
| [9] | 吕明静,肖春霞,郭露村.复合分散剂稳定的氧化铝悬浮液抗电解质特性的研究.陶瓷学报.2010.31(1):91-95. |
| [10] | Wang X L,Guo L C.Effect of sucrose on rheological properties of aqueous zirconia suspensions with polyacrylate.Powder Technol.,2008,186(2):107-112. |
| [11] | Hotta Y,Tsugoshi T,Nagaoka T,et al.Effect of oligosaccharide alcohol addition to alumina slurry and translucent alumina produced by slip casting.J.Am.Ceram.Soc.,2003,86(5):756-760. |
| [12] | Pradhan M,Bhargava P.Influence of sucrose addition on rhcology of alumina slurries dispersed with a polyacrylate dispersant.J.Am.Ceram.Soc.,2005,88(4):833-838. |
| [13] | Xiao C X,Gao L,Lu M J,et al.Synergistic effect of copolymer and poly(vinylpyrrolidone) mixtures on rheology of aqueous SiC suspensions.Colloids Surf A:Physicochem.Eng.Aspects,2010,355(1/2/3):104-108. |
| [14] | Wang X L,Guo L C.Effect of ionic strength on rheological properties of binary Al2O3/ZrO2 suspensions.Colloids Surf A:Physicochem.Eng.Aspects,2007,297(1/2/3):7-13. |
| [15] | Tseng W J,Wu C H.Aggregation,rhenlogy and electrophoretic packing structure of aqueous Al2O3 nanoparticle suspensions.Acta Mater.,2002,50(15):3757-3766. |
| [16] | Studart A R,Amstad E,Antoni M,et al.Rheology of concentrated suspensions containing weakly attractive alumina nanoparticles.J.Am.Ceran.Soc.,2006,89(8):2418-2425. |
| [17] | Cesarano J,Aksay I A.Processing of highly concentrated aqueous α-alumina suspensions stabilized with polyelectrolytes.J.Am.Ceram.Soc.,1988,71(12):1062-1067. |
| [18] | 吕明静.二元分散剂对氧化铝水性悬浮液稳定性影响的研究.南京:南京工业大学硕士论文,2010. |
| [19] | Vermǒhlen K,Lewandowski H,Narres H D,et al.Adsorption of polyelectrolytes on oxudes-the influence of ionic strength,molar mass,and Ca2+ ions.Colloids Surf A:Physicochem Eng Aspects,2000.163(1):45-53. |
| [20] | 刑存章,于跃芹.有机化学.济南:山东大学出版社,2001:494-513. |
| [21] | 刘银,张明旭.高能球磨氧化铝的微观结构和红外光谱分析.安徽理工大学学报(自然科学版),2008,28(4):62-64. |
| [22] | 李莉娟,孙凤久,楼丹花,等.纳米氧化铝的晶型及粒度对其红外光谱的影响.功能材料,2007,38(3):479-484. |
| [23] | 赵春芳,尹正勇,李波.α型氧化铝的微观结构对红外光谱图的影响.光谱实验室,2007,24(3):34l-344. |
| [24] | Guo L C.Surface and Colloidal Chemistry in Processing of Advanced Alumina Ceramics.Nagaoka,Japan:Nagaoka University of Technology,1998. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%