以异丁烯和马来酸酐共聚物(PIBM)为分散剂和凝胶剂,同时添加两种表面活性剂,通过机械发泡和注凝成型工艺制备高气孔率Al2O3泡沫陶瓷,并研究了DE211环氧树脂对Al2O3泡沫陶瓷结构和性能的影响。结果表明,该工艺能够制备气孔率达92.4%的Al2O3泡沫陶瓷。随着DE211环氧树脂的加入,泡沫陶瓷的气孔率略有降低,抗压强度由0.5 MPa提高到3 MPa,平均气孔尺寸由582μm下降到331μm,孔壁塌陷少。这归因于DE211环氧树脂的环氧基能够与PIBM的酸酐发生反应,加快凝胶固化速度,从而有利于稳定泡沫结构。
Porous alumina ceramics with high porosity were fabricated by gel-casting and mechanical foaming. Here, PIBM, a co-polymer of isobutylene and maleic anhydride, was used as both dispersant and gelling agent, and two kinds of surfactants were selected as the foaming agent. Then, the effect of DE211 (a water-soluble ep-oxy resin) on the microstructure and properties of porous alumina ceramics were studied systematically. The re-sults showed that porous alumina ceramics with maximum porosity up to 92.4% was achieved by this method. With addition of DE211 epoxy resin from 0 to 0.5wt%, porosity of porous alumina ceramics slightly decreased and mean pore size decreased from 582μm to 331μm, but compressive strength increased from 0.5 MPa to 3 MPa. Besides, there is hardly collapse of cell wall in the porous ceramics. These results are ascribed to the re-action between epoxy group of DE211 and anhydride of PIBM that enhanced the gelling rate and stabilized the foam structure.
参考文献
| [1] | 毛小建 .新型凝胶注成型及其在氧化物陶瓷中的应用[D].中国科学院上海硅酸盐研究所,2008. |
| [2] | Sellappan, Pathikumar;Wang, Erheng;Santos, Christian J. Espinoza;On, Tommy;Lambros, John;Kriven, Waltraud M..Wave propagation through alumina-porous alumina laminates[J].Journal of the European Ceramic Society,20151(1):197-210. |
| [3] | Soh, Edwin;Kolos, Elizabeth;Ruys, Andrew J..Foamed high porosity alumina for use as a bone tissue scaffold[J].CERAMICS INTERNATIONAL,20151 Pt.B(1 Pt.B):1031-1047. |
| [4] | Weijiang Xue;Yang Sun;Yong Huang.Preparation and Properties of Porous Alumina with Highly Ordered and Unidirectional Oriented Pores by a Self-Organization Process[J].Journal of the American Ceramic Society,20117(7):1978-1981. |
| [5] | Uhlirova, T.;Gregorova, E.;Pabst, W.;Necina, V..Preparation of cellular alumina ceramics via biological foaming with yeast and its microstructural characterization via stereological relations[J].Journal of the European Ceramic Society,20151(1):187-196. |
| [6] | Xiaojian Mao;Shiwei Wang;Shunzo Shimai.Porous ceramics with tri-modal pores prepared by foaming and starch consolidation[J].CERAMICS INTERNATIONAL,20081(1):107-112. |
| [7] | Yang, Y.;Shimai, S.;Wang, S..Room-temperature gelcasting of alumina with a water-soluble copolymer[J].Journal of Materials Research,201311(11):1512-1516. |
| [8] | Yi Sun;Shunzo Shimai;Xiang Peng.Fabrication of transparent Y_2O_3 ceramics via aqueous gelcasting[J].CERAMICS INTERNATIONAL,20146(6):8841-8845. |
| [9] | Jun Wang;Fang Zhang;Feng Chen.Fabrication of Aluminum Oxynitride (γ-AlON) Transparent Ceramics with Modified Gelcasting[J].Journal of the American Ceramic Society,20145(5):1353-1355. |
| [10] | 舒夏;李军;张海龙;董满江;岛井骏臧;王士维.水溶性共聚物为交联剂的凝胶注成型AlN陶瓷的研究[J].无机材料学报,2014(3):327-330. |
| [11] | Yang, Y.;Shimai, S.;Sun, Y.;Dong, M.;Kamiya, H.;Wang, S..Fabrication of porous Al2O3 ceramics by rapid gelation and mechanical foaming[J].Journal of Materials Research,201315(15):2012-2016. |
| [12] | 王敏 .直接发泡法制备结构可控泡沫陶瓷[D].天津大学,2012. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%