온도감응성 하이드로젤 기반 증발 결정화 시스템

김호연; 이종휘; Hoyeon Kim; Jonghwi Lee

Polymer(Korea), Vol.45, No.6, 897-903, November, 2021

DOI10.7317/pk.2021.45.6.897 Export Citation

온도감응성 하이드로젤 기반 증발 결정화 시스템

Evaporative Crystallization System Based on Temperature-Responsive Hydrogel

김호연, 이종휘^†

중앙대학교 공과대학 화학신소재공학과

Hoyeon Kim, and Jonghwi Lee^†

Department of Chemical Engineering and Materials Science, Chung-Ang University, 84, Heukseok-ro, Dongjak-gu, Seoul 06974, Korea

E-mail:

초록

천일염의 생산은 전세계적으로 일부 지역에서만 자연 증발을 통해 가능하며, 그 외 지역에서는 많은 에너지를 사용하는 증발 결정화 방식으로 이루어지고 있다. 본 연구에서는 온도감응성 하이드로젤을 사용하여 해수를 끌어올리고 이를 증발시켜 천일염을 인공적 에너지를 사용하지 않고 지속적으로 생산할 수 있는 시스템을 개발하였다. 증발결정화기 내의 증발 부분과 펌프 부분을 분리하여서, 결정에 의한 막힘 현상 없이 생성되는 결정을 따로 모을 수 있었다. 펌프 부분에 poly(N-isopropylacrylamide)를 사용하여서 낮에는 물을 방출하고, 밤에는 물을 흡수하는 시스템을 만들었다. 증발 부분에는 물에 뜰 수 있는 환원된 그래핀 옥사이드가 코팅된 종이를 사용하여 결정을 종이 밑면에 모을 수 있게 하였다. 본 친환경적 증발 결정화기는 향후 다양한 물질의 결정화에 활용될 가능성이 높다.

The production of sea salt is possible only through natural evaporation in some regions of the world, and in other regions, it is made by evaporative crystallization using a lot of energy. In this study, we developed a system that can continuously produce sea salt without using artificial energy by pumping seawater using a temperature-sensitive hydrogel and evaporating it. By separating the evaporating part and the pump part in the evaporative crystallizer, it was possible to separate the generated crystals without clogging by the crystals. By using poly(N-isopropylacrylamide) in the pump part, we made a system that discharges water during the day and absorbs water at night. In the evaporating part, a paper coated with reduced graphene oxide that can float on water was used to collect crystals on the underside of the paper. This eco-friendly evaporative crystallizer is likely to be used for crystallization of various materials in the future.

Keywords:thermosensitive hydrogel;solar evaporator;poly(N-isopropylacrylamide);NaCl crystallization

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[2] Javor BJ, Limnol., 28, 153 (1983)

[3] Guntur GJ, Prihanto AA, Earth Env. Sci., 106, 012082 (2018)

[4] Silva JG, Morais HA, Silvestre MPC, Food Res. Int., 36, 73 (2003)

[5] Kelley CP, Mohtadi S, Cane MA, Seager R, Kushnir Y, P Natl. Acad Sci. USA, 112, 3241 (2015)

[6] Cao S, Jiang Q, Wu X, Ghim D, Gholami Derami H, Chou PI, Jun YS, Singamaneni S, J. Mater. Chem. A, 7, 24092 (2019)

[7] Mekonnen MM, Hoekstra AY, Sci. Adv., 2, e15003 (2016)

[8] Ravizky A, Nadav N, Desalination, 205(1-3), 374 (2007)

[9] Tong T, Elimelech M, Environ. Sci. Technol., 50, 6846 (2016)

[10] Warner NR, Christie CA, Jackson RB, Vengosh A, Environ. Sci. Technol., 47, 11849 (2013)

[11] Shahidzadeh-Bonn N, Desarnaud J, Bertrand F, Chateau X, Bonn D, Phys. Rev. E, 81, 066110 (2010)

[12] Zhou X, Zhao F, Guo Y, Zhang Y, Yu G, Energ. Environ. Sci., 11, 1985 (2018)

[13] Xu Z, Zhang L, Zhao L, et al., Energ. Environ. Sci., 13, 830 (2020)

[14] Geng H, Xu Q, Wu M, Ma H, Zhang P, Gao T, Qu L, Ma T, Li C, Nat. Commun., 10, 1512 (2019)

[15] Chen C, Kuang Y, Hu L, Joule, 3, 683 (2019)

[16] Wang X, Gan Q, Chen R, Peng H, Zhang T, Ye M, ACS Sustain. Chem. Eng., 8, 7753 (2020)

[17] Xu J, Wang Z, Chang C, Fu B, Tao P, Song C, Shang W, Deng T, Desalination, 484, 114423 (2020)

[18] Wu L, Dong Z, Cai Z, Ganapathy T, Fang NX, Li C, Yu C, Zhang Y, Song Y, Nat. Commun., 11, 521 (2020)

[19] Kuang Y, Chen C, He S, Hitz EM, Wang Y, Gan W, Mi R, Hu LA, Adv. Mater., 31, 190049 (2019)

[20] Lee C, Kang S, Seo J, Lee J, ACS Appl. Mater. Inter., 13, 4442 (2021)

[21] Maeda Y, Higuchi T, Ikeda I, Langmuir, 16(19), 7503 (2000)

[22] Zhang H, Cooper AI, Adv. Mater., 19(11), 1529 (2007)

[23] An S, Kim BS, Lee J, J. Ind. Eng. Chem., 33, 362 (2016)

[24] Kim BS, Lee J, Chem. Eng. J., 301, 158 (2016)

[25] Kang S, Kang TH, Kim BS, Oh J, Park S, Choi IS, Lee J, Son JG, Compos. Part B-Eng., 162, 580 (2019)

[26] Kim J, Cho Y, Kim S, Lee J, ACS Macro Lett., 6, 1119 (2017)

[27] Lee SR, Lee JH, Polym. Korea, 43(4), 646 (2019)

[28] Kim B, Kim MK, Cho Y, Hamed EE, Gillette MU, Sci. Adv., 6, eabc56 (2020)

[29] Li J, Liu X, Tomaskovic-Crook E, Crook JM, Wallace GG, Colloids Surf. B: Biointerfaces, 176, 87 (2019)

[30] Abid, Sehrawat P, Islam SS, Mishra P, Ahmad S, Sci. Rep., 8, 3537 (2018)

[31] Haq MA, Su Y, Wang D, Mat. Sci. Eng. C-Mater., 70, 842 (2017)

[32] Shahidzadeh-Bonn N, Rafai S, Bonn D, Wegdam G, Langmuir, 24(16), 8599 (2008)