有机物HPMC和PAM对磷酸盐自硬砂性能影响探究
Study on the Effect of Organic Matter HPMC and PAM on the Properties of Phosphate No-Bake Sand
王超 1夏露 1张友寿 1黄飞1
作者信息
- 1. 湖北工业大学材料与化学工程学院,湖北武汉 430068;绿色轻工材料湖北省重点实验室,湖北武汉 430068
- 折叠
摘要
探究羟丙基甲基纤维素、聚丙烯酰胺两种辅料浓度及加入量对自硬砂性能的影响,讨论了两种辅料联合加入的影响,借助SEM-EDS和FTIR对影响机理进行了初步分析.结果表明,占粘结剂2%的0.7%羟丙基甲基纤维素水溶液和占粘结剂1%的0.8%聚丙烯酰胺水溶液联合加入能有效提高自硬砂干强度和抗吸湿性.相对湿度为40%～60%RH时,干强度由0.67 MPa提高到0.97 MPa,存放4天期间,平均强度提高24.58%;恒湿箱80%～85%RH时,砂样存放4天的平均强度提高43.27%,24～96 h内强度下降率由31.25%下降到25.00%.
Abstract
The effects of concentration and addition amount of hypromellose and polyacrylamide on the properties of no-bake sand were investigated,and the effect of the combined addition of the two accessories was discussed.The influence mechanism was preliminarily analyzed by SEM-ED Sand FTIR.The results show that the combined addition of 0.7%wt hypromellose aqueous solution accounted for 2%of the binder and 0.8%wt polyacrylamide aqueous solution accounted for 1%of the binder can effectively improve the dry strength and moisture resistance of no-bake sand.When the relative humidity is 40%-60%RH,the dry strength of the sand sample increases from 0.67 MPa to 0.97 MPa after hardening,and the average strength increases by 24.58%during 4 days of storage.When stored in the constant humidity box with 80%-85%RH for 4 days,the average strength increases by 43.27%,and the strength reduction rate decreased from 31.25%to 25.00%within 24-96 h.
关键词
磷酸盐粘结剂/自硬砂/羟丙基甲基纤维素/聚丙烯酰胺/抗吸湿性Key words
phosphate binder/no-bake sand/hypromellose/polyacrylamide/moisture resistance引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据