摘要
研究了表面活性剂对聚乙二醇－聚甲基丙烯酸甲酯／Ｆｅ－２Ｎｉ粉末注射成形喂料性能的影响。首先用单分子层吸附模型计算出形成单分子层吸附所需表面活性剂的理论值，然后分别将硬脂酸、司班－２０、司班－８０、吐温－６０等不同表面活性剂加入粘结剂中，发现表面活性剂可通过降低粘结剂对粉末的润湿角、降低粘结剂－粉末喂料的粘度而提高最大粉末装载量，在超过单分子层吸附的量之后，继续增加表面活性剂，仍能进一步发挥其有益作用。不同表面活性剂对喂料性能影响的程度有所不同，通过选择合适的表面活性剂，该聚乙二醇－聚甲基丙烯酸甲酯粘结剂对Ｆｅ－２Ｎｉ 羰基粉末装载量达５５％（体积分数）。
The effects of various surfactants on properties of the polyethylene glycol (PEG)-Polymethyl methacrylate/Fe-2Ni feedstock are studied. First, one-molecule-layer model is used to calculate theoretically amount of surfactant needed to form one-molecule-layer absorption on powders. Then, different kinds of surfactants, such as, stearic acid, span-20, span-80, tween-60 etc., are added into the binder respectively. It was found that the surfactants increase the maximum powder lending by decreasing contact angle between the binder and the powder, and viscosity of the feedstock. Even the amount of surfactant is much higher than that of one-molecule-layer absorption, the surfactant still have its effective function, The effects of different kinds of surfactants on the properties of feedstock are not the same. By selecting a proper surfactant, the maximum powder loading can reach 55% (volume fraction) for Fe-2Ni carbonyl powder and PEG-based binder.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2001年第2期131-134,共4页
Rare Metal Materials and Engineering
基金
"863"高新技术计划资助项目(715009009)
