摘要
利用阴离子型分散剂聚环氧琥珀酸(polyepoxysuccinic acid,PESA)/非离子型分散剂聚乙烯吡咯烷酮(polyvinylpyrrolidone,PVP)复配为二元分散剂,对Al2O3/SiC悬浮液的流变性能进行了研究。结果表明:在碱性条件下,添加复合分散剂PESA/PVP的Al2O3/SiC悬浮液比加入单一分散剂的体系有更好的分散性。当复合分散剂总添加量为0.4%(质量分数)、PESA与PVP质量比为3∶1时,Al2O3/SiC悬浮液的黏度最低。添加二元分散剂的Al2O3/SiC悬浮液能在25%(体积分数)~45%的固含量范围内保持稳定。添加PESA/PVP作为分散剂的Al2O3/SiC悬浮液的抗电解质性能优于单一PESA作为分散剂的悬浮液。PESA与PVP通过静电斥力与空间位阻的协同效应,极大提高了Al2O3/SiC悬浮液的稳定性。
The rheological property of Al2O3/SiC suspensions was investigated wth polyepoxysuccinic acid(i.e.,PESA)as an anionic dispersant and polyvinylpyrrolidone(i.e.,PVP)as a non-ionic dispersant(PESA/PVP).The experimental results show that under alkaline conditions,the rheological property of Al2O3/SiC suspensions with PESA/PVP is different from that with sole dispersant.The suspension with 0.3%PESA and 0.1%PVP(mass fraction)has a lower viscosity.The suspension dispersed with PESA/PVP maintains the suspension stability in the solids content range from 25%(volume fraction)to 45%.Also,the anti-electrolyte performance of Al2O3/SiC suspension with PESA/PVP is superior to the suspension with a sole dispersant of PESA.The interaction between the particles in the suspension is due to the electrostatic repulsion and steric hindrance,leading to the suspension stability.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2014年第12期1560-1565,共6页
Journal of The Chinese Ceramic Society
基金
"江苏省大学生实践创新训练计划"项目(201310291010Z)
长江学者和创新团队发展计划(PCSIRT
IRT1146)
江苏高校优势学科建设工程项目(PAPD)资助
