Composite foaming agent were prepared by aqueous solution intercalation method,colloidal modification method and supercritical carbon dioxide intercalation method to insert 4,4’–oxydibenzenesulfonyl hydrazide (OBSH) into Na-montmoril-lonite (MMT). The products were characterized by FTIR,TG,X-ray diffraction and SEM. Under all three conditions,OBSH suc-cessful intercalation to MMT and significantly affect the morphology of MMT. OBSH content of aqueous intercalation is 12.2%, followed by colloid modification method,in the case of supercritical carbon dioxide intercalation,the OBSH content is 10.7%. The supercritical carbon dioxide intercalation MMT structure is more conductive to improving the reunion,so MMT become fluffy and more disorderly.%采用水溶液插层法、胶体化改性法、超临界二氧化碳插层法三种方法将4，4’–氧代双苯磺酰肼(OBSH)插层到钠基蒙脱土(MMT)层间，制备OBSH／MMT复合发泡剂。通过傅立叶变换红外光谱(FTIR)、热失重(TG)、X射线衍射(XRD)、扫描电子显微镜(SEM)等方法对产品进行表征，探究了不同插层方法对复合发泡剂中OBSH插层量、分解温度以及MMT形貌的影响。实验结果表明，三种插层条件下OBSH均能成功插层至MMT中，且制备方法能够影响复合发泡剂的插层效果及MMT形貌。水溶液插层法制备的复合发泡剂中OBSH含量最多，为12.2%，胶体化改性法次之，超临界二氧化碳插层法最少，为10.7%。同时可以得出超临界二氧化碳插层法更有利于改善MMT的团聚结构，使得MMT变得蓬松、无序。
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