表面活性剂对水玻璃性能影响研究 摘要： 本文考察了十二烷基磺酸钠，烷基酚聚氧乙烯醚，脂肪醇聚氧乙烯醚-平平加对水玻璃物理性能的影响，同时考察表面活性剂加入量、吹CO2时间对水玻璃砂抗压强度的影响，并与化学改性剂聚丙烯酰胺进行了比较。实验结果表明：水玻璃砂的抗压强度随着水玻璃的加入量的增加而增加；水玻璃加入表面活性剂后,其粘度随着表面活性剂加入量的增加而减少，当表面活性剂加入在0.6%左右时，水玻璃砂的抗压强度最高，跟化学改性剂相比，改性效果有所提高；水玻璃砂的抗压强度一般随着吹CO2时间的增加而有所加强，但过量的吹CO2导致水玻璃砂表面出现白霜（NaHCO3）影响水玻璃砂性能，吹气时间在30s-60s为宜；不同的硬化工艺对水玻璃砂的抗压强度也有不同的影响，有机酯-CO2复合硬化方式比直接吹CO2效果更好。
关键词：改性剂；粘度；水玻璃砂；抗压强度
Study on performance of sodium silicate with Surfactant
Abstract：This paper examines the sodium dodecyl sulfate, alkyl phenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether - peregal influence on the physical properties of sodium silicate. At the same time, CO2 blowing time, for the amount of surfactant on the compressive strength of the sodium silicate sand have been studied. And are compared with those of the chemical modifier of polyacrylamide. Experimental results showed that the compressive strength of sodium silicate sand with water glass increased with the increase of the amount; After adding surfactant sodium silicate, its viscosity increased with the increase of the amount of surfactant decreasing, when the surfactant to add at around 0.6%, sodium silicate sand has the highest compressive strength, compared with a chemical modifying agent, the modification effect is improved; Compressive strength of sodium silicate sand generally increased with the increased of CO2 blowing time increasing, but the failure of the sodium silicate sand too much CO2 blowing rime (NaHCO3) influence the reliability of sodium silicate sand, blowing time in the 30 s to 60 s advisable; Different hardening process on the compressive strength of sodium silicate sand also have different effects, such as compound organic ester - CO2 hardening way than direct CO2 blowing effect is better.Different hardening process on the compressive strength of sodium silicate sand also have different effects, such as compound organic ester - CO2 hardening way than direct CO2 blowing effect is better.
Key words：modifier; viscosity; water-glass sand; compressive strength
目录
1．前言 1
1.1水玻璃简述 1
1.2水玻璃砂存在的主要问题 2
1.2.1溃散性差 2
1.2.2 旧砂再生、回用困难 4
1.2.3砂型（芯）表面粉化 4
1.2.4．抗吸湿性差 4
1.2.5粘砂 4
1.3硬化工艺 5
1.4水玻璃的改性方法 6
1.4.1 水玻璃化学改性 6
1.4.2 水玻璃物理改性研究 9
1.5 选题的目的和意义 11
1.6 研究内容和目标 11
1.6.1 研究内容 11
1.6.2 研究目标 11
2.实验 13
2.1 实验原材料 13
2.1.1 原砂 13
2.1.2 水玻璃 13
2.1.3有机酯，粘土 13
2.2 实验设备 14
2.2.1 101-3型干燥箱 14
2.2.2 SHN辗轮式混砂机 14
2.2.3 XQY-Ⅱ智能型砂强度机 15
2.2.4粘度测量装置 15
2.2.5 CO2水玻璃砂吹气硬化装置 15
2.3 实验方案 16
2.3.1未改性的水玻璃加入量对水玻璃砂性能的影响 16
2.3.2化学改性剂，表面活性剂加入量对水玻璃的粘度的影响 16
2.3.3化学改性剂、表面活性剂的加入量对水玻璃砂性能的影响 17
2.3.4 硬化工艺的不同对水玻璃砂性能的影响 17
2.3.5有机酯－吹CO2复合硬化时吹CO2时间对水玻璃砂性能的影响 18
2.4 实验过程 18
2.4.1 混砂工艺 18
2.4.2 制取圆筒型试样 19
2.4.3 硬化工艺 19
2.4.4水玻璃砂抗压强度的测定 19
2.4.5水玻璃改性过程 19
3 实验结果及讨论分析 20
3.1未改性的水玻璃加入量对水玻璃砂性能的影响 20
3.2 化学改性剂和表面活性剂的加入量对水玻璃粘度的影响 21
3.3化学改性剂，表面活性剂的加入量对水玻璃砂性能的影响 22
3.4不同硬化的工艺对水玻璃砂性能的影响 25
3.5吹气时间对水玻璃砂性能的影响 26
4 结论 28
致 谢 29
参考文献 30,3620