CAJ | 학술논문

目的研究酸预处理玻璃微粉对其表面特性的影响。方法以醋酸水溶液处理玻璃微粉，利用粒子尺寸分析仪、比表面积分析仪、扫描电镜(SEM)和X射线光电子能谱(XPS)等技术手段，研究玻璃微粉表面特性与酸预处理的关系。结果①随着醋酸浓度增大或处理时间延长，玻璃微粉粒径和表面Ca2+相对浓度减小、比表面积增大；②经5%醋酸预处理60min的玻璃微粉颗粒呈圆钝状，表面可见坑凹或孔洞。结论酸预处理玻璃微粉导致其粒径、比表面积、表面Ca2+相对浓度及形貌等表面特性的变化，进而会导致玻璃离子水门汀性能的改变。
목적연구산예처리파리미분대기표면특성적영향。방법이작산수용액처리파리미분，이용입자척촌분석의、비표면적분석의、소묘전경(SEM)화X사선광전자능보(XPS)등기술수단，연구파리미분표면특성여산예처리적관계。결과①수착작산농도증대혹처리시간연장，파리미분립경화표면Ca2+상대농도감소、비표면적증대；②경5%작산예처리60min적파리미분과립정원둔상，표면가견갱요혹공동。결론산예처리파리미분도치기립경、비표면적、표면Ca2+상대농도급형모등표면특성적변화，진이회도치파리리자수문정성능적개변。
Objective　To investigate the relationship between the surface characteristics of acid-pretreated glass powder and acid-pretreatment.Methods　The glass powder was pretreated respectively by varying concentrations of acetic acid for 60 minutes.The relationship between the surface characteristics of acid-pretreated glass powder and acid-pretreatment were researched by some techniques of surface analysis,such as Centrifugal Particle Size Analyzer,Specific Surface Analyzer,SEM and XPS.Results　①The particle size and Ca2+ relative concentration of the glass powder acid-pretreated decreased,but the superfacial area increased with rising acetic acid concentration and extending the length time of acid-pretreatment.②The surface appearance of the glass powder acid-pretreated by 5% acetic acid for 60min was round,and some holes was found on the surface of the glass powder.Conclusion　Acid-pretreatment can result in the change of the surface characteristics,such as the particle size,superfacial area,Ca2+ relative concentration and the surface appearance of the glass powder acid-pretreated by acetic acid.So the powder may influence progressively the properties of glass ionomer cements.