CAJ | 학술논문

针对可预涂厌氧胶贮存稳定性差的问题，从过氧化物微胶囊颗粒控制和热稳定性出发，以异丙苯过氧化氢（CHP）为芯材，脲醛树脂（PUF）为壁材，制备脲醛树脂包覆CHP微胶囊。研究了稳定剂用量、反应时间、搅拌速率和升温速率等工艺条件对微胶囊颗粒形态的影响。结果表明：稳定剂用量和反应时间需要大于一临界值后才能得到形貌规整的微胶囊；升温速率越快，颗粒越早稳定；只要反应速率合适，搅拌速率对颗粒大小的影响较小。在相同温度下，脲醛树脂包覆CHP微胶囊的热失重远低于CHP；制备的脲醛树脂包覆CHP微胶囊稳定性优于市售国外包覆CHP型微胶囊，大大提高了可预涂厌氧胶的贮存稳定性。
침대가예도염양효저존은정성차적문제，종과양화물미효낭과립공제화열은정성출발，이이병분과양화경（CHP）위심재，뇨철수지（PUF）위벽재，제비뇨철수지포복CHP미효낭。연구료은정제용량、반응시간、교반속솔화승온속솔등공예조건대미효낭과립형태적영향。결과표명：은정제용량화반응시간수요대우일림계치후재능득도형모규정적미효낭；승온속솔월쾌，과립월조은정；지요반응속솔합괄，교반속솔대과립대소적영향교소。재상동온도하，뇨철수지포복CHP미효낭적열실중원저우CHP；제비적뇨철수지포복CHP미효낭은정성우우시수국외포복CHP형미효낭，대대제고료가예도염양효적저존은정성。
In order to improve the storage stability of precoatable anaerobic adhesive, the particle control and thermal stability of peroxide type microcapsules were studied. The microcapsules were prepared using poly(urea-formaldehyde)(PUF) as shell material and cumene hydroperoxide(CHP) as core material by in situ polymerization technology. The effects of emulsifier concentration, reaction time, agitation speed and heating rate on particle size and morphology were investigated. Microcapsules with integrated morphology were obtained when emulsifier dosage and reaction time were more than the critical value. The higher the heating rate was, the sooner the particles became stable. The agitation speed had little effect on the particle size when the reaction rate was suitable. The thermal weight loss of PUF-walled CHP microcapsules was less than that of CHP at the same temperature. The thermal stability of PUF-walled CHP microcapsules mixed with commercial anaerobic adhesive was higher than that of commercial microcapsules mixed with commercial anaerobic adhesive. The PUF-walled CHP microcapsules exhibited good storage stability.