文章摘要
于梦,王菲菲,赵彦生.聚醚改性聚天冬氨酸减水剂的制备及其性能[J].精细化工,2018,35(12):0
聚醚改性聚天冬氨酸减水剂的制备及其性能
Synthesis and Properties of Polyether-Modified Poly(aspartic acid) Superplasticizer
投稿时间:2018-03-09  修订日期:2018-06-11
DOI:
中文关键词: 聚天冬氨酸  聚醚  减水剂  制备  性能
英文关键词: poly(aspartic acid)  polyether  superplasticizer  synthesis  property
基金项目:国家自然科学基金青年基金项目(21304066);山西省科技攻关项目(20100311117)
作者单位E-mail
于梦 太原理工大学 yum4319@163.com 
王菲菲 太原理工大学  
赵彦生 太原理工大学 zhaoyansheng@tyut.edu.cn 
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中文摘要:
      摘要:以聚琥珀酰亚胺(PSI)和端氨基聚醚M2005(M2005)为原料,合成了聚醚改性聚天冬氨酸减水剂(PEMPASP),采用FTIR对PEMPASP进行了表征,探讨了不同减水剂及其用量对水泥净浆流动度和胶砂强度的影响;通过对TOC、Zeta电位、XRD以及TG-DSC分析,研究了PEMPASP减水剂的作用机理。结果表明,当采用nPSI:nM2005为1:0.14所制备的PEMPASA,在掺量为水泥的0.35%时,水泥的净浆流动度比掺加聚天冬氨酸(PASP)的水泥净浆流动度提高了189%,在用量为0.25%时,水泥胶砂抗折强度比空白水泥增长了15.6%,比含有PASP的水泥胶砂增长了17%;由于在PASP分子上引入长侧链聚醚链,改变了减水剂分子上的电荷密度和侧链结构,影响了减水剂对水泥颗粒的静电作用和位阻作用,进而改善了吸附、分散以及水泥的水化作用,提高了减水剂的综合性能。
英文摘要:
      Abstract:Polyether-modified poly(aspartic acid) superplasticizer(PEMPASP)was synthesized using polysuccinimide (PSI) and polyetheramine M2005 (M2005) as materials. FTIR was used to characterize the PEMPASP. The effects of different superplasticizers and their dosage on the fluidity and flexural strength of cement pastes were discussed and the corresponding mechanism of PEMPASP superplasticizer was studied by TOC, Zeta potential, XRD and TG-DSC. The results showed that when the molar ratio of PSI and M2005 was 1: 0.14 and the dosage of 0.35% of cement, the fluidity of cement pastes mixed with PEMPASP was 189% higher than that of cement paste mixed with PASP, and at dosage of 0.25% the flexural strength of concrete increased by 15.6% compared with that of blank cement and 17% higher than that of cement mortar containing PASP. The introduction of long-chain polyether into PASP molecules changes the charge density and the side chain structure of PEMPASP, which leads to change of the electrostatic effect and steric effect of the superplasticizer on the cement particles. The adsorption, dispersion and the hydration of cement are improved, and then the comprehensive performance of superplasticizer is improved.
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