CAJ | 학술논문

皂化反应和成纤过程是制备磁流变脂的关键环节，实验室分别在皂化时、稀释时、高温炼制时、冷却时加入羰基铁粉制备了4种不同工艺条件的磁流变脂，采用扫描电子显微镜(SEM)、振动样品磁强计(VSM)、综合热分析仪(DSC-TG)等表征了其微观结构及性能，研究了羰基铁粉对磁流变脂皂化和成纤结构的影响。结果表明，羰基铁粉不同加入方式对磁流变脂的微观结构具有较大的影响。皂化前加入羰基铁粉会影响皂化反应的进行，相应磁流变脂的理化性能和离心沉降稳定性较差，但其具有较好的热稳定性和磁性能。皂化反应结束后加入羰基铁粉，加入时机距皂纤维形成的时间越短，羰基铁粉在磁流变脂皂纤维结构中的分散越好，对应的长期沉降稳定性越好，但比饱和磁化强度较低。皂纤维形成后加入羰基铁粉形成的磁流变脂热稳定性差于皂纤维形成前加入羰基铁粉制备的磁流变脂。
조화반응화성섬과정시제비자류변지적관건배절，실험실분별재조화시、희석시、고온련제시、냉각시가입탄기철분제비료4충불동공예조건적자류변지，채용소묘전자현미경(SEM)、진동양품자강계(VSM)、종합열분석의(DSC-TG)등표정료기미관결구급성능，연구료탄기철분대자류변지조화화성섬결구적영향。결과표명，탄기철분불동가입방식대자류변지적미관결구구유교대적영향。조화전가입탄기철분회영향조화반응적진행，상응자류변지적이화성능화리심침강은정성교차，단기구유교호적열은정성화자성능。조화반응결속후가입탄기철분，가입시궤거조섬유형성적시간월단，탄기철분재자류변지조섬유결구중적분산월호，대응적장기침강은정성월호，단비포화자화강도교저。조섬유형성후가입탄기철분형성적자류변지열은정성차우조섬유형성전가입탄기철분제비적자류변지。
Several mineral oil-based magnetorheological grease (MRG)samples were prepared in our laboratory, the influence of addition phase of carbonyl iron on the structure and properties of MRG were investigated by scanning electron microscopy,vibrating sample magnetometer,thermal synthetic analysis.The results show that the microstructure of MRG depends on the addition phase of carbonyl iron.When carbonyl iron was added before saponification reaction,the centrifugal sedimentation stability and basic property of MRG will become worse than that of MRG prepared by adding carbonyl iron after saponification reaction,but the former has bet-ter thermal stability and magnetic property.When the addition phase of carbonyl iron was after the saponifica-tion reaction,the structure and property of MRG depends on the length of time from adding carbonyl iron to forming soap fiber.If the time was very short,the carbonyl iron can be dispersed well in the soap structure of MRG,and the centrifugal sedimentation stability of it was very excellent,but its magnetic property was poor. A good thermal stability of MRG will be acquired when the carbonyl iron was added before the formation of soap fiber,rather than after the phase.