CAJ | 학술논문

以超临界流体法制备聚甲基丙烯酸甲酯（PMMA）-CaCO3粉末涂料,应用于纸张表面干法处理技术。为了解决无机颜料与有机胶黏剂界面结合、均匀分散等问题,探究了用硅烷偶联剂KH-570对纳米碳酸钙进行改性。实验考察了反应温度和改性CaCO3用量对制备的无水相涂料性能的影响,通过FT-IR、TG等对改性后CaCO3进行表征,利用GPC-十八角度激光光散射联用技术、TG、SEM等对制备的粉末涂料进行表征。实验表明,与未改性的纳米Ca-CO3相比,改性CaCO3与PMMA粉末涂料颗粒分布均匀,界面结合和分散状况基本能满足纸张表面干法处理的要求。
이초림계류체법제비취갑기병희산갑지（PMMA）-CaCO3분말도료,응용우지장표면간법처리기술。위료해결무궤안료여유궤효점제계면결합、균균분산등문제,탐구료용규완우련제KH-570대납미탄산개진행개성。실험고찰료반응온도화개성CaCO3용량대제비적무수상도료성능적영향,통과FT-IR、TG등대개성후CaCO3진행표정,이용GPC-십팔각도격광광산사련용기술、TG、SEM등대제비적분말도료진행표정。실험표명,여미개성적납미Ca-CO3상비,개성CaCO3여PMMA분말도료과립분포균균,계면결합화분산상황기본능만족지장표면간법처리적요구。
Polymethyl methacrylate（PMMA）-CaCO3 powdery coating was made in the method of supercritical fluid and used in the dry surface treatment of paper. In order to solve the problems of combination and dispersion with PMMA, nano-calcium carbonate particles well dispersed in ethanol were modified by silane coupling agent KH-570. The effects of the reaction temperature and amount of modified calcium carbonate on the poly- merization of MMA were discussed,the modified CaCO3 was characterized by FT-IR and TGA, and the powdery coating particles were systematically investigated by GPC, TGA and SEM methods. The experimental results indicated that the particle size of PMMA was smaller,which can be used to dry surface treatment of paper coating. From SEM observation,it was found that the modified calcium granules carbonate were able to evenly disperse and embedded in the PMMA and didn＇t show conglomeration. Moreover, the interracial bonds and dispersion situation of water-free powdery coating particles were fairly well.