摘要
以顺酐环化、聚合产物聚环氧琥珀酸(PESA)和硫脲(CSN)为原料合成了一种聚环氧琥珀酸衍生物(CSN-PESA),利用红外光谱和核磁共振谱对聚环氧琥珀酸衍生物的结构进行了表征,测定了聚环氧琥珀酸和硫脲不同比例时产物的分子量;探讨了聚环氧琥珀酸衍生物的阻垢性能、分散氧化铁的性能和生物降解性能;利用红外光谱和扫描电镜对垢的晶型(形)进行了研究。结果表明,当PESA与CSN的质量比为8∶4时,产物的分子量达到了581左右,其阻垢和分散效果最好;在钙离子浓度为400 mg/L、碳酸氢根离子浓度为800 mg/L的介质中,当聚环氧琥珀酸衍生物用量为8 mg/L时,阻垢率达到95%以上;当n(Ca2+)=150 mg/L,n(Fe2+)=10 mg/L,加药量为20 mg/L时,其上清液最小透光率为75%。结果表明,改性聚环氧琥珀酸衍生物对碳酸钙垢有晶格扭曲的作用,可把稳定的方解石转化为球霰石,表现出良好的阻垢分散性能和可生物降解性能。
Polyethylene succinic acid( PESA) was synthetized through cyclization and polymerization of maleic anhydride,and modified polyethylene succinic acid derivatives( CSN-PESA) was prepared with PESA and thiourea. Characterization of the structure of the modified polyethylene succinate derivatives was proved by infrared spectrum and nuclear magnetic resonance spectrum. Molecular weight was studied in the condition of different proportion of PESA and thiourea. The scale inhibition performance,dispersing iron oxide performance and biodegradability were investigated in aqueous solution. The scale of the crystal calcium carbonate was studied by infrared spectroscopy and scanning electron microscopy( SEM). The experimental results showed that the molecular weight of CSN-PESA reached 581 when the mass ratio of the CSN-PESA was 8∶ 4,which its scale inhibition and dispersion effect were optimum. When the dosage of polyethylene succinate derivatives was 8 mg / L,the calcium ion concentration is 400 mg / L and bicarbonate ions concentration of was 800 mg / L medium,anti-scaling ratio was above 95%; The minimum light transmittance of the clear liquid was 75% when the dosage of polyethylene succinate derivatives was 20 mg / L,the concentration of Ca2 +was 150 mg / L and the concentration of Fe2 +was 10 mg / L. It was proved that CSN-PESA could distort calcium carbonate crystallite from steady calcite to vaterite,and show good performance of scale inhibition and biodegradable properties.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2015年第13期13048-13052,13056,共6页
Journal of Functional Materials
基金
河北省科技资助项目(06213027)
关键词
改性聚环氧琥珀酸
分子合成
分子量
粘度
降解
阻垢机理
modified polyethylene succinic acid
molecular synthesis
the molecular weight
viscosity
degradation
scale inhibition mechanism
作者简介
柳鑫华（1971-）,女,河北唐山人,副教授,硕士生导师,从事合成绿色水处理剂研究.
