zhpsЖурнал прикладной спектроскопииZhurnal Prikladnoii Spektroskopii0514-7506B. I. Stepanov Institute of Physics of the National Academy of Scienceszhps-815Research ArticleСтатьиПрименение низкополевой 1Н ЯМР-спектроскопии для определения концентрации и молекулярной массы поликарбоксилатных суперпластификаторовApplication of 1H Low-Field NMR Spectroscopy for the Determination of the Concentration and Molecule Weight of Polycarboxylate SuperplasticizersJiY.JiY.

201804, Шанхай

Shanghai 201804

tjyanliangji@tongji.edu.cnSunZh.SunZh.

201804, Шанхай

Shanghai 201804

sunzhptongji@163.comPangM.PangM.

201804, Шанхай

Shanghai 201804

YangJ.YangJ.

201804, Шанхай

Shanghai 201804

Школа материаловедения и инженерии Университета ТунцзиKey Laboratory of Advanced Civil Engineering Materials, Ministry of Education, School of Materials Science and Engineering at Tongji University202129052021882255260Copyright © Ji Y., Sun Z., Pang M., Yang J., 20212021Ji Y., Sun Z., Pang M., Yang J.Ji Y., Sun Z., Pang M., Yang J.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://zhps.ejournal.by/jour/article/view/815

На основе низкополевой спектроскопии ядерного магнитного резонанса (ЯМР) 1Н разработан метод определения концентрации и молекулярной массы поликарбоксилатных суперпластификаторов (PCE). Синтезированы пять типов PCE с различными отношением эфира к кислоте (от 3:1 до 5:1) и функциональными группами, молекулярные структуры разных PCE охарактеризованы с помощью эксклюзионной хроматографии. Растворы PCE с концентрацией 0-40 % изучены с помощью последовательности Карра—Парселла—Мейбума—Гилла методом низкополевой 1Н ЯМР-спектроскопии. Результаты показывают, что значение Т2 основного пика линейно зависит от концентрации PCE. Интенсивность сигнала с T2 <10 мс для растворов PCE с концентрацией 20 % линейно коррелирует с молекулярной массой PCE.

As a type of water reducer, polycarboxylate superplasticizers (PCEs) has been widely used in the concrete industry. The concentration and molecule weight of PCEs have a profound impact on the performance of fresh concrete. Based on 1H low-field nuclear magnetic resonance (NMR) spectroscopy, this paper developed a novel method for the determination of the concentration and characterization of the molecule weight of PCEs. Five types of PCEs with various ether to acid ratios (3:1 to 5:1) and functional groups were syn-thetized in laboratory conditions, and their molecular structures were characterized by size exclusion chromatography. PCE solutions with concentrations from 0 to 40% were measured using the Carr-Purcell-Meiboom-Gill sequence by 1Н low-field NMR. The results showed that the T2 value of the main peak has a linear relation with the PCE concentration. The signal intensity of peaks whose T2 values are smaller than 10 ms of the PCE solutions with a concentration of 20% is linearly correlated to the molecule weight of PCEs.

поликарбоксилатные суперпластификаторыконцентрациямолекулярная массанизкополевая гН ЯМР-спектроскопияpolycarboxylate superplasticizersconcentrationmolecule weight:H low-field Carr-Purcell-Meiboom-Gill spectroscopyThe authors acknowledge the financial support provided by the China National Key R&D Program during the 13th Five-year Plan Period (Grant No. 2016YFC0701004), the National Natural Science Foundation of China (Grant No.51678441), the Science and Technology Commission of the Shanghai Municipality (Grant No. 19DZ1202702 and 19DZ1201404), and the Key Science and Technology Foundation of the Gansu Province (Grant No. 19YF3GA004). Gratitude is extended for support from the Shanghai Post-doctoral Excellence Program (2019-2020) and Visiting Scientist project in the Darcy Center of TU/e (2019-2020), the project of ‘High-level Foreign Experts’ in Tongji University, and the China Scholarship Council. We also like to thank Niumag Electric Corporation (Shanghai, China) for their assistance in performing these measurementsReferencesJ. Plank, E. Sakai, C. W. Miao, C. Yu, J. X. Hong, Cem. Concr. Res, 78, 81-99 (2015).J. Plank, E. Sakai, C. W. Miao, C. Yu, J. X. Hong, Cem. Concr. Res, 78, 81-99 (2015).Y. Yu, J. Liu, Q. Ran, et al., J. Therm. Anal. Calorim, 111, 437-444 (2013).Y. Yu, J. Liu, Q. Ran, et al., J. Therm. Anal. Calorim, 111, 437-444 (2013).Z. Zhang, Z. Wang, J. Ren, J. Pei, Iran. Polym. J., 25, No. 6, 549-557 (2016).Z. Zhang, Z. Wang, J. Ren, J. Pei, Iran. Polym. J., 25, No. 6, 549-557 (2016).S. Qian, Y. Yao, Z. Wang, et al., Constr. BuildMater., 169, 452-461 (2018).S. Qian, Y. Yao, Z. Wang, et al., Constr. BuildMater., 169, 452-461 (2018).H. Yan, Z. Xiong, S. Yaning, et al., J. Wuhan Univ. Technol. Mater. Sci., 33, No. 4, 932-937 (2018).H. Yan, Z. Xiong, S. Yaning, et al., J. Wuhan Univ. Technol. Mater. Sci., 33, No. 4, 932-937 (2018).Y. Qian, K. Lesage, K. E. Cheikh, G. D. Schutter, Cem. Concr. Res., 107, 75-84 (2018).Y. Qian, K. Lesage, K. E. Cheikh, G. D. Schutter, Cem. Concr. Res., 107, 75-84 (2018).H. Yan, Z. Xiong, S. Lianglinag, et al., Constr. Build. Mater, 202, 656-668 (2019).H. Yan, Z. Xiong, S. Lianglinag, et al., Constr. Build. Mater, 202, 656-668 (2019).K. Yamada, T. Takahashi, S. Hanehara, et al., Cem. Concr. Res., 30, No. 2, 197-207 (2000).K. Yamada, T. Takahashi, S. Hanehara, et al., Cem. Concr. Res., 30, No. 2, 197-207 (2000).Y. R. Zhang, X. M. Kong, Z. B. Lu, et al., Cem. Concr. Res, 67, 184-196 (2015).Y. R. Zhang, X. M. Kong, Z. B. Lu, et al., Cem. Concr. Res, 67, 184-196 (2015).X. Q. Qiu, X. Y. Peng, C. H. Yi, Y. H. Deng, J. Disp. Sci. Technol, 32, No. 2, 203-212 (2011).X. Q. Qiu, X. Y. Peng, C. H. Yi, Y. H. Deng, J. Disp. Sci. Technol, 32, No. 2, 203-212 (2011).K. R. Brownstein, C. E. Tarr, Phys. Rev. A, 19, 2446-2453 (1979).K. R. Brownstein, C. E. Tarr, Phys. Rev. A, 19, 2446-2453 (1979).M. Brax, M. Kohne, E. Kroener et al., Geoderma, 340, 269-278 (2019).M. Brax, M. Kohne, E. Kroener et al., Geoderma, 340, 269-278 (2019).Y. J. Yuan, R. Z. Rezaee, M. Verrall, et al., Int. J. Coal Geol, 194, 11-21 (2018).Y. J. Yuan, R. Z. Rezaee, M. Verrall, et al., Int. J. Coal Geol, 194, 11-21 (2018).Y. Ji, Z. Sun, J. Yang, P. Leo, et al., Constr. Build. Mater, 240, 117938, ISSN 0950-0618 (2020).Y. Ji, Z. Sun, J. Yang, P. Leo, et al., Constr. Build. Mater, 240, 117938, ISSN 0950-0618 (2020).Y. Ji, P. Leo, Z. Sun, Cem. Concr. Res, 125, 105866, ISSN 0008-8846 (2019).Y. Ji, P. Leo, Z. Sun, Cem. Concr. Res, 125, 105866, ISSN 0008-8846 (2019).Lhcio L. Barbosa, Flavio V. C. Kock, et al., Energy Fuels, 27, No. 2, 673-679 (2013).Lhcio L. Barbosa, Flavio V. C. Kock, et al., Energy Fuels, 27, No. 2, 673-679 (2013).F. C. Giovanna, C. S. Renzo, L. B. Lhcio, et al., Fuel, 140, No. 15, 762-769 (2015).F. C. Giovanna, C. S. Renzo, L. B. Lhcio, et al., Fuel, 140, No. 15, 762-769 (2015).L. Luetkmeyer, B. T. Maria Ines, et al., Macromol. Symp, 258, No. 1, 108-112 (2007).L. Luetkmeyer, B. T. Maria Ines, et al., Macromol. Symp, 258, No. 1, 108-112 (2007).Y. Ji, Z. Sun, et al., Constr. Build. Mater., 100, 255-261 (2015).Y. Ji, Z. Sun, et al., Constr. Build. Mater., 100, 255-261 (2015).C. Pathama, C. Pavinee, S. Klanarong, et al., Carbohydr. Polym, 53, No. 3, 233-240 (2015).C. Pathama, C. Pavinee, S. Klanarong, et al., Carbohydr. Polym, 53, No. 3, 233-240 (2015).

The authors declare that there are no conflicts of interest present.