| Citation: |
WANG Shu, WU Zhuliang, ZHENG Jianmin, ZHANG Yang, DENG Yiqiang. Synthesis and Application of Ethenyloxy-polyoxyethylene Ether Slump Retaining Typed Polycarboxylate Superplasticizer[J]. Journal of South China Normal University (Natural Science Edition), 2024, 56(3): 34-39. DOI: 10.6054/j.jscnun.2024035
|
Based on molecular structure design theory, a polycarboxylic acid superplasticizer with high slump retaining performance was prepared by free radical polymerization with acrylic acid and acrylamide in the Redox system of sodium erythorbate/Na2SO3 and Fe2+, using ethenyloxy polyoxyethylene ether with double bond directly connected with oxygen atom as polymeric monomer. The results showed that the ethenyloxy-polyoxyethylene ether has higher polymerization activity than conventional polyether monomer due to its C＝C double bond directly connected with oxygen atom, and the time of induction period can be shortened by nearly 1/2. The initial and 1 h slump of the prepared concrete can be increased by 16% and 64%, respectively, compared with conventional water reducing agents. However, the initial and 1 h slump expansion were 7% and 22% higher. The FT-IR spectra showed that the amide group and carboxyl group of the functional monomers were successfully grafted on the main chain of polycarboxylic acid superplasticizer.
| [1] |
YANG L, YILMAZ E, LI J, et al. Effect of superplasticizer type and dosage on fluidity and strength behavior of cemented tailings backfill with different solid contents[J]. Construction and Building Materials, 2018, 187: 290-298. doi: 10.1016/j.conbuildmat.2018.07.155
|
| [2] |
FANG Y H, KE Y L, LAI H Z, et al. Study on the synthesis, properties and characterization of EPEG slump retaining typed polycarboxylate superplasticizer[J]. Key Engineering Materials, 2022, 905, 325-330. doi: 10.4028/www.scientific.net/KEM.905.325
|
| [3] |
曾湘楚, 张光华, 武哲. 长链疏水改性苯丙共聚物乳液的合成及固沙性能[J]. 华南师范大学学报(自然科学版), 2021, 53(6): 34-42. doi: 10.6054/j.jscnun.2021090
ZENG X C, ZHANG G H, WU Z. The synthesis and sand solidification properties of long chain hydrophobic modified styrene-acrylic copolymer emulsion[J]. Journal of South China Normal University (Natural Science Edition), 2021, 53(6): 34-42. doi: 10.6054/j.jscnun.2021090
|
| [4] |
MARLON A L, ERICH D. R, WALKEY B, et al. Metakaolin-based geopolymers: relation between formulation physicochemical properties and efflorescence formation[J]. Composites Part B: Engineering, 2020, 182: 1-15.
|
| [5] |
裴继凯, 王越, 陈广明, 等. EPEG大单体聚合升温与其合成减水剂性能的关联[J]. 混凝土, 2023(7): 66-69;74. https://www.cnki.com.cn/Article/CJFDTOTAL-HLTF202307015.htm
PEI J K, WANG Y, CHEN G M, et al. Correlation of EPEG macromonomer polymerization temperature rise and its synthetic water reducer performance[J]. Concrete, 2023(7): 66-69;74. https://www.cnki.com.cn/Article/CJFDTOTAL-HLTF202307015.htm
|
| [6] |
GB/T 8077-2012. 混凝土外加剂匀质性试验方法[S]. 北京: 中国标准出版社, 2012.
|
| [7] |
GB 8076-2008. 混凝土外加剂规范[S]. 北京: 中国标准出版社, 2008.
|
| [8] |
OUATTARA D, YAHIA A, MBONIMPA M, et al. Effects of superplasticizer on rheological properties of cemented paste backfills[J]. International Joumal of Mineral Processing, 2017, 161: 28-40. doi: 10.1016/j.minpro.2017.02.003
|
| [9] |
郑建民, 余小荣, 吴朱亮, 等. 含酰胺基团早强型聚羧酸减水剂研究[J]. 新型建筑材料, 2023(8): 11-14;18. https://www.cnki.com.cn/Article/CJFDTOTAL-XXJZ202308003.htm
ZHENG J M, YU X R, WU Z L, et al. Study on the early-strength polycarboxylate superplasticizer containing acylamide group[J]. New Building Materials, 2023(8): 11-14;18. https://www.cnki.com.cn/Article/CJFDTOTAL-XXJZ202308003.htm
|
| [10] |
PLANK J, PÖLLMANN K, ZOUAOUI N, et al. Synthesis and performance of methacrylic ester based polycarboxylate superplasticizers possessing hydroxy terminated poly (ethylene glycol) side chains[J]. Cement and Concrete Research, 2008, 38(10): 1210-1216. doi: 10.1016/j.cemconres.2008.01.007
|
| [11] |
冯鹏超, 张光华, 张雪, 等. 酯类小单体对聚羧酸减水剂缓释行为的影响[J]. 华南师范大学学报(自然科学版), 2022, 54(2): 37-44. doi: 10.6054/j.jscnun.2022024
FENG P H, ZHANG G H, ZHANG X, et al. Effect of small ester monomers on the slow-release behavior of polycarboxylate superplasticizer[J]. Journal of South China Normal University(Natural Science Edition), 2022, 54(2): 37-44. doi: 10.6054/j.jscnun.2022024
|
| [12] |
ZONG E M, LIU X H, WANG L N, et al. Graft polymerization of acrylic monomers onto lignin with CaCl2-H2O2 as initiator: preparation, mechanism, characterization, and application in poly(lactic acid)[J]. ACS Sustainable Chemistry & Engineering, 2018, 6(1): 337-348.
|
| [13] |
赵海谦, 高继慧, 周伟, 等. Fe2+/H2O2体系内各种自由基在氧化NO中的作用[J]. 化工学报, 2015(1): 449-454. https://www.cnki.com.cn/Article/CJFDTOTAL-HGSZ201610047.htm
ZHAO H Q, GAO J H, ZHOU W, et al. Roles of varied radicals in NO oxidation by Fe2+/H2O2 system[J]. CIESC Journal, 2015(1): 449-454. https://www.cnki.com.cn/Article/CJFDTOTAL-HGSZ201610047.htm
|
| [14] |
谭俊华, 徐明, 朱开金, 等. 早强保坍型聚羧酸减水剂的制备与性能研究[J]. 硅酸盐通报, 2018, 37(2): 449-455. https://www.cnki.com.cn/Article/CJFDTOTAL-GSYT201802013.htm
TAN J H, XU M, ZHU K J, et al. Synthesis and properties of polycarboxylate superplasticizer with early strength and slump loss resistance[J]. Bulletin of the Chinese Ceramic Society, 2018, 37(2): 449-455. https://www.cnki.com.cn/Article/CJFDTOTAL-GSYT201802013.htm
|
| [15] |
雷田雨, 卢晓磊, 杜保立, 等. 含酰胺基团早强型聚羧酸减水剂的制备及性能研究[J]. 新型建筑材料, 2019, 46(5): 7-9;20. https://www.cnki.com.cn/Article/CJFDTOTAL-XXJZ201905003.htm
LEI T Y, LU X L, DU B L, et al. Study on preparation and property of early strength polycarboxylate superplasticizer containing acylamide group[J]. New Building Materials, 2019, 46(5): 7-9;20. https://www.cnki.com.cn/Article/CJFDTOTAL-XXJZ201905003.htm
|
| 1. |
肖世伟，李承凯，杨美娜，冯祥虎，孙国萃，杜军. MIPS指令集的流水线CPU模型机设计. 单片机与嵌入式系统应用. 2023(02): 15-18 .
|
Supported by: Beijing Renhe Information Technology Co., Ltd. 
DownLoad: