CAJ | 학술논문

冷却条件是磁流变脂制备过程中的关键环节，对磁流变脂的胶体结构具有较大的影响。分别在空气冷却、常温水浴、冰水浴条件下制备了3种皂质量百分数含量为7％、羰基铁粉质量百分数含量为30％的磁流变脂，考察了不同冷却条件对磁流变脂理化性质、微观结构及动态流变行为的影响。结果表明，不同冷却条件对磁流变脂的微观结构、理化性能和动态流变性能均有较大影响。冷却速度越快，得到的磁流变脂储能模量越小，稠度越低，压力分油性能越差。冷却条件对磁流变脂的静磁性能影响较小，对磁流变脂的磁流变效应影响较大，常温水浴冷却制备的磁流变脂具有较高的磁流变效应。冷却条件引起的磁流变脂模量值的不同主要是由冷却条件导致磁流变脂中皂纤维与磁性颗粒形成的胶体结构的差异所致。
냉각조건시자류변지제비과정중적관건배절，대자류변지적효체결구구유교대적영향。분별재공기냉각、상온수욕、빙수욕조건하제비료3충조질량백분수함량위7％、탄기철분질량백분수함량위30％적자류변지，고찰료불동냉각조건대자류변지이화성질、미관결구급동태류변행위적영향。결과표명，불동냉각조건대자류변지적미관결구、이화성능화동태류변성능균유교대영향。냉각속도월쾌，득도적자류변지저능모량월소，주도월저，압력분유성능월차。냉각조건대자류변지적정자성능영향교소，대자류변지적자류변효응영향교대，상온수욕냉각제비적자류변지구유교고적자류변효응。냉각조건인기적자류변지모량치적불동주요시유냉각조건도치자류변지중조섬유여자성과립형성적효체결구적차이소치。
Three kinds of magnetorheological(MR)grease based on different cooling profile was prepared with a magnetic particle and lithium soap weight fraction of 30% and 7%,respectively.The physicochemical property, microstructure and rheological properties of them were investigated.The results show that the property and mi-crostructure of MR grease can be altered to a large extent by the cooling process.When the cooling velocity was faster,the storage modulus and the consistency of the MR grease will become lower,and the separation oil with pressure is worse.The static magnetism of MR grease is almost independent of the cooling profile,but the MR effect of MR grease is dramatically affect by the different cooling velocity,the MR grease prepared by room temperature water bath has the best MR effect than others.The difference in modulus of three MR greases can be attributed to the microstructure variance causing by the different cooling profile.