磷石膏的钛酸酯偶联剂表面改性
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摘要
为解决磷石膏的亲水问题,提高其与有机物的相容性,采用机械复合改性工艺,以钛酸酯偶联剂对磷石膏进行表面改性。以活化指数为试验指标,得出其最佳改性条件:钛酸酯偶联剂的掺量为2%,改性研磨温度45℃,改性时间20 min,研磨机的转速50 r/min。在最佳改性工艺下,改性后磷石膏的活化指数达到99.6%,分散稳定性较好。对改性后的磷石膏进行红外分析,结果表明其与钛酸酯偶联剂发生了较好的键合作用。改性后磷石膏可用作不饱和聚酯树脂(UPR)的无机填料,磷石膏/UPR复合材料的力学性能有所提高。
Surface of phosphogypsm was modified with titanate coupling agent to solve the hydrophilicity of phosphogypsum and to improve its compatibility.With mechanical composite modification process and activation index as target,optimum modification conditions were confirmed as follows; dosage of titanate coupling agent was 2%, grinding temperature was 45 ℃, modification time was 20 min,and grinding machine turns was 50 r/min. Activation index of phosphogypsm reached 99.6% after modification and with good dispersion stability.The infrared absorption spectrum indicated that the chemical bonds were formed between phosphogypsum and titanate coupling agent. Modified phosphogypsum was used as inorganic filler in UPR and mechanical properties of phosphogypsum/UPR composite material has increased.
Surface of phosphogypsm was modified with titanate coupling agent to solve the hydrophilicity of phosphogypsum and to improve its compatibility.With mechanical composite modification process and activation index as target,optimum modification conditions were confirmed as follows; dosage of titanate coupling agent was 2%, grinding temperature was 45 ℃, modification time was 20 min,and grinding machine turns was 50 r/min. Activation index of phosphogypsm reached 99.6% after modification and with good dispersion stability.The infrared absorption spectrum indicated that the chemical bonds were formed between phosphogypsum and titanate coupling agent. Modified phosphogypsum was used as inorganic filler in UPR and mechanical properties of phosphogypsum/UPR composite material has increased.
引文
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[4]陈宇飞,李连明,袁广雪,等.纳米二氧化钛表面化学改性及表征[J].哈尔滨师范大学自然科学学报,2011,27(4):71-73.
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[6]朱庆英,莫永.稀土偶联剂对碳酸钙表面改性的研究[J].塑料科技,2006,34(5):48-50.
[7]郭英凯,刘晓薇,张秀起,等.纳米二氧化钛表面改性研究[J].无机盐工业,2003,35(3):25-26.
[2]郭江,于顺洋,张宪康.纳米Ti O2的表面改性及其在有机/无机复合乳液制备中的应用[J].化学建材,2004(4):1-4.
[3]高长华,刘厚凡,潘庆辉,等.纳米氧化镁粉体的表面改性研究[J].无机盐工业,2008,40(4):28-30.
[4]陈宇飞,李连明,袁广雪,等.纳米二氧化钛表面化学改性及表征[J].哈尔滨师范大学自然科学学报,2011,27(4):71-73.
[5]马志领,王景辉,马春雨,等.水镁石的硅烷偶联剂表面改性[J].河北大学学报(自然科学版),2007,27(3):283-287.
[6]朱庆英,莫永.稀土偶联剂对碳酸钙表面改性的研究[J].塑料科技,2006,34(5):48-50.
[7]郭英凯,刘晓薇,张秀起,等.纳米二氧化钛表面改性研究[J].无机盐工业,2003,35(3):25-26.