聚天冬氨酸共聚物的合成、表征及性能研究  

Synthesis, Characterization and Performance of Copolymer of Polyaspartic Acid

作　　者：高玉华[1,2,3] 王延吉[1] 刘振法 张利辉 

机构地区：[1]河北工业大学化工学院,天津300130 [2]河北省能源研究所,河北石家庄050081 [3]河北省工业节水工程技术研究中心,河北石家庄050081

出　　处：《高校化学工程学报》2010年第2期301-306,共6页Journal of Chemical Engineering of Chinese Universities

基　　金：河北省自然科学基金(B2007000956)

摘　　要：利用天冬氨酸热缩聚产物聚琥珀酰亚胺(PSI)和2-氨基乙磺酸(SEA)、天冬氨酸(ASP)合成了一种聚天冬氨酸共聚物。红外光谱法和元素分析法表征了聚天冬氨酸共聚物的结构,研究了聚琥珀酰亚胺与2-氨基乙磺酸、天冬氨酸不同比例时的接枝率;考查了聚天冬氨酸共聚物的阻垢和分散性能;利用扫描电子显微镜对CaCO3晶形进行了观察和分析。实验结果表明:当PSI:SEA:ASP=1:0.6:0.4时,其阻垢和分散的综合性能较好;当Ca2+质量浓度400mg·L-1、HCO3-量浓度800mg·L-1、聚天冬氨酸共聚物用量4mg·L-1时,阻垢率为59%;聚天冬氨酸共聚物用量10mg·L-1,分散氧化铁时上清液最小透光率为53%。聚天冬氨酸共聚物对CaCO3有晶格扭曲和分散作用。The polysuccinimide （PSI） was prepared via thermal condensation of aspartic acid （ASP）, and then the copolymer of polyaspartic acid PASP-SEA-ASP was synthesized by the prepared PSI with taurine （SEA） and ASP. The structure of the synthesized polyaspartic acid copolymer was characterized by FT-IR and elemental analysis, and the calcium carbonate crystal of the scale samples were analyzed with SEM. The effects of the different mole ratios of PSI：SEA：ASP on the grafting ratio of PASP-SEA-ASP and on its scale inhibition performance and dispersal property for iron oxide in aqueous solution were studied. The results show that the PASP-SEA-ASP containing sulfogroup and carboxylic acid group has good scale inhibition performance, especially when the mole ratio of PSI：SEA：ASP is 1：0.6：0.4. When the concentration of Ca2＋ is 400 mg？L？1, HCO3？ 800 mg？L？1 and the used dosage of PASP-SEA-ASP is 4 mg？L？1, the scale inhibition ratio of PASP-SEA-ASP is 59%; and the least diaphaneity of the top liquid of the aqueous solution with dispersing iron oxide is 53% when 10 mg·L-1 of PASP-SEA-ASP is used. It was found that the copolymer of polyaspartic acid could distort calcium carbonate crystallite and make calcium carbonate crystallite more dispersive.

关 键 词：聚天冬氨酸 聚天冬氨酸共聚物 接枝率 阻垢机理 

分 类 号：TQ085.412[化学工程] TQ316.343