摘要
以经过γ-(2,3环氧丙氧)丙基三甲氧基硅烷(GPTMS)改性的微晶纤维素(MCC)为造孔剂、以高岭土为基材制备多孔陶瓷,并研究了该陶瓷样品的微观结构、孔径分布、显气孔率和抗弯强度。研究表明:(1)以经过表面改性的MCC颗粒为造孔剂制备获得的多孔陶瓷材料其孔隙结构受造孔剂用量影响明显;(2)当造孔剂的含量低于10.0 wt%时,多孔陶瓷的孔隙尺寸和显气孔率会随着造孔剂用量的增加而显著增大,但是当造孔剂的用量进一步提高时多孔陶瓷的孔隙结构发展速度开始逐渐下降;(3)多孔陶瓷的抗弯强度主要受其孔隙结构影响,利用5.0 wt%的MCC制备而成的多孔陶瓷材料抗弯强度为21.5 MPa,造孔剂含量提高导致的多孔陶瓷内部孔隙结构比例增大会使多孔陶瓷的抗弯强度出现明显降低。
In this study, microcrystalline cellulose（MCC） modified by 3-glycidoxypropyltrimethoxysilane（GPTMS） was used as the pore-forming agent for the porous ceramics made from kaolin. The microstructure, pore diameter distribution, apparent porosity and bending strength of the porous ceramics were investigated.（1）The results showed that the pore structure in the porous ceramics was affected by the concentration of the surface-modified MCC obviously.（2）Pore diameter and apparent porosity of the porous ceramics were enlarged significantly with the increase of pore-forming agent when the content of surface-modified MCC was less than 10.0 wt%, while the further enhancement of MCC affected the pore structure of the porous ceramics inconspicuously.（3）Flexural strength of the porous ceramics was mainly influenced by the pore structure. The flexural strength of porous ceramics samples made from 5.0 wt% surface-modified MCC was 21.5 MPa, and the increase of pore structure resulted from the addition of pore-forming agent led to the decrease of flexural strength of porous ceramics significantly.
出处
《中国陶瓷》
CAS
CSCD
北大核心
2016年第6期67-71,共5页
China Ceramics
基金
河南省高等学校重点科研项目(15A430019)
关键词
多孔陶瓷
微晶纤维素
孔径分布
显气孔率
抗弯强度
Porous ceramics
Microcrystalline cellulose
Pore diameter distribution
Apparent porosity
Flexural strength
