重质碳酸钙的表面改性及填充聚丙烯  

Surface Modification of Heavy Calcium Carbonate and its Application in Polypropylene

作　　者：张陶忠 陈晓龙[2] 郝晓宇 于福家[2] ZHANG Taozhong;CHEN Xiaoong;HAO Xiaoyu;YU Fujia(Shanxi Zijin Mining Group company limited,Xinzhou 034000,Shanxi,China;College of Resource and Civil Engineer,Northeastern University,Shenyang 110819,Liaoning,China)

机构地区：[1]山西紫金矿业有限公司,山西忻州034000 [2]东北大学资源与土木工程学院,辽宁沈阳110819

出　　处：《矿产综合利用》2024年第6期141-145,共5页Multipurpose Utilization of Mineral Resources

摘　　要：这是一篇矿物材料领域的论文。采用钛酸酯偶联剂JN-114与铝酸酯偶联剂DL-411为改性剂,采用干法改性对重质碳酸钙进行表面改性,以活化指数和接触角为表征手段,研究重质碳酸钙表面改性效果,结合红外光谱对表面改性机理进行分析,并对其填充聚丙烯(PP)复合材料进行研究。结果表明,JN-114改性较佳工艺:药剂用量1.0%,改性温度70℃,改性时间30 min,改性重质碳酸钙活化指数99.21%,接触角114.34°。DL-411改性较佳工艺:药剂用量1.0%,改性温度90℃,改性时间30 min,改性重质碳酸钙活化指数100.00%,接触角121.70°。红外光谱分析结果表明JN-114和DL-411二者均以化学吸附作用于重质碳酸钙表面上,从而使得重质碳酸钙由亲水性变为疏水性。JN-114与DL-411表面改性能够有效提高PP复合材料的冲击强度,当添加量20%时,复合材料冲击强度较大,较纯PP分别提高了38.87%与41.97%。This is an article in the field of mineral materials.While titanate coupling agent JN-114 and aluminate coupling agent DL-411 were used as modifiers,the surface of heavy calcium carbonate was modified by dry method.The effect of surface modification on heavy calcium carbonate was studied by means of activation index and contact angle.The mechanism of surface modification was analyzed with infrared spectrum analysis,and its filled PP composite was studied.The results show that the best modification process of JN-114 is as follows:reagent dosage 1.0%,modification temperature 70℃,modification time 30 min,modified heavy calcium carbonate activation index 99.21%,contact angle 114.34°.DL-411 modification best process:reagent dosage 1.0%,modification temperature 90℃,modification time 30 min,modified heavy calcium carbonate activation index 100.00%,contact angle 121.70°.Infrared spectrum analysis showed that JN-114 and DL-411 both acted on the surface of heavy calcium carbonate by chemical adsorption,heavy calcium carbonate changed fromhydrophobicity into hydrophobicity.The surface modification of JN-114 and DL-411 can effectively improve the impact strength of PP composite.When the modified heavy calcium carbonate filling content is 20%,the impact strength of the composite reaches the best,which is 38.87%and 41.97%higher than that of pure PP,respectively.

关 键 词：矿物材料 重质碳酸钙 表面改性 机理研究 聚丙烯 

分 类 号：TD989[矿业工程—选矿]