叔丁醇-水基凝胶注模工艺因素研究  

Technological factors in TBA-aqueous based gel-casting

作　　者：雷印元 卢志华[1] 翟倩倩 冯亚静 于颖 李义函 LEI Yinyuan;LU Zhihua;ZHAI Qianqian;FENG Yajing;YU Ying;LI Yihan(Department of Physics and Information Engineering,Jining University,Qufu 273155,China)

机构地区：[1]济宁学院物理与信息工程系

出　　处：《功能材料》2019年第11期11178-11181,11189,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(21603084);山东省重点研发计划资助项目(2017GGX20137)

摘　　要：以叔丁醇-水混合介质为溶剂,丙烯酰胺(acrylamide, AM)为单体进行凝胶注模成型,研究了叔丁醇含量、反应温度、引发剂和催化剂加入量等参数对凝胶时间与胶体形态的影响。结果发现,凝胶时间随叔丁醇用量的增加而增加,但随反应温度的提高显著下降;随引发剂含量的增加,凝胶时间先快速降低至一定水平后保持较为稳定的状态,继续增加引发剂用量,凝胶时间基本呈线性增加;随催化剂用量的增加,凝胶时间持续减少,在催化剂加入量较低时凝胶时间变化显著。在反应温度25℃、叔丁醇含量30%(体积分数)、引发剂2.5%(质量分数)、催化剂0.1%(质量分数)时,凝胶时间为25 min,凝胶时间适宜,所得样品表面质量良好,干燥收缩率较低,能够满足实际需要。Using acrylamide as monomer, gel-casting was enforced with a mixture of tert-butyl alcohol(TBA) and water as a solvent. The effects of TBA ratio, reaction temperature, the addition of the initiator and catalyst on the gelation time and colloidal form were investigated. The results showed that the gelation time increased with the increase of TBA ratio, but decreased significantly with the increase of reaction temperature. With the increase of the initiator content, gelation time significantly reduced to a certain level and remained stable, but increased linearly when the dosage of the initiator was continuously increased. The gelation time decreased with the increase of catalyst dosage, which changed significantly when the catalyst dosage was low. When the reaction temperature was 25 ℃, TBA ratio was 30 vol%, initiator was 2.5 wt%, catalyst was 0.1 wt% and the gelation time was 25 min, the surface quality of the sample was good and the drying shrinkage was low, which could meet the needs of engineering applications.

关 键 词：凝胶注模成型 AM体系 叔丁醇-水基 工艺因素 

分 类 号：TB321[一般工业技术—材料科学与工程]