Hollow calcium carbonate （ CaCO3 ） microspheres were prepared in aqueous solution with the presence of polyoxyethylene （20） sorbitan monolaurate （ Tween20 ） and sodium dodecyl sulfate （SDS）. The microspheres w...Hollow calcium carbonate （ CaCO3 ） microspheres were prepared in aqueous solution with the presence of polyoxyethylene （20） sorbitan monolaurate （ Tween20 ） and sodium dodecyl sulfate （SDS）. The microspheres were characterized with X-ray diffraction （XRD） , scanning electron microscopy （SEM） and transmission electron microscope （TEM）. The X-ray diffraction data showed that the hollow CaCO3 microsphere consisted of calcite crystals. The influence of Tween20 and SDS concentrations on the morphology of CaCO3 crystals was investigated. The results suggested that the ＂core-shell model＂ of Tween20/SDS micelle aggregated as templates, which could control the growth of hollow CaCO3 microspheres. The interaction between mixed surfactants and calcium ions played a critical role in organizing calcium carbonate in microscopic level.展开更多
为更好地发挥梳棉机的锡林针布在不同工艺条件下对纤维的梳理作用,提高梳理效果和生条质量,采用两种齿深的锡林针布,在两种梳棉机产量条件下进行对比试验,将盖板花进行收集,采用Primier a Qura测试仪进行检测。试验结果显示,锡林齿深对...为更好地发挥梳棉机的锡林针布在不同工艺条件下对纤维的梳理作用,提高梳理效果和生条质量,采用两种齿深的锡林针布,在两种梳棉机产量条件下进行对比试验,将盖板花进行收集,采用Primier a Qura测试仪进行检测。试验结果显示,锡林齿深对盖板花质量是有影响的。浅齿比深齿更加有利于棉结的去除,尤其是纤维棉结的去除,对带籽屑棉结的去除浅齿和深齿相差不大;对于盖板花中棉结的平均尺寸而言,纤维棉结、带籽屑棉结和棉结总数的平均尺寸表现出相同的规律,均以0.3 mm齿深的锡林针布条件下的盖板花质量为好,排除的棉结尺寸较大。展开更多
基金Supported by the Beijing Natural Science Foundation(2082021)the National Science & Technology Pillar Program in the 12th Five-Year Plan Period (2011BAE06B06-2)
文摘Hollow calcium carbonate （ CaCO3 ） microspheres were prepared in aqueous solution with the presence of polyoxyethylene （20） sorbitan monolaurate （ Tween20 ） and sodium dodecyl sulfate （SDS）. The microspheres were characterized with X-ray diffraction （XRD） , scanning electron microscopy （SEM） and transmission electron microscope （TEM）. The X-ray diffraction data showed that the hollow CaCO3 microsphere consisted of calcite crystals. The influence of Tween20 and SDS concentrations on the morphology of CaCO3 crystals was investigated. The results suggested that the ＂core-shell model＂ of Tween20/SDS micelle aggregated as templates, which could control the growth of hollow CaCO3 microspheres. The interaction between mixed surfactants and calcium ions played a critical role in organizing calcium carbonate in microscopic level.
文摘为更好地发挥梳棉机的锡林针布在不同工艺条件下对纤维的梳理作用,提高梳理效果和生条质量,采用两种齿深的锡林针布,在两种梳棉机产量条件下进行对比试验,将盖板花进行收集,采用Primier a Qura测试仪进行检测。试验结果显示,锡林齿深对盖板花质量是有影响的。浅齿比深齿更加有利于棉结的去除,尤其是纤维棉结的去除,对带籽屑棉结的去除浅齿和深齿相差不大;对于盖板花中棉结的平均尺寸而言,纤维棉结、带籽屑棉结和棉结总数的平均尺寸表现出相同的规律,均以0.3 mm齿深的锡林针布条件下的盖板花质量为好,排除的棉结尺寸较大。
