Kinetic Insights into Marangoni Effect-Assisted Preparation of Ultrathin Hydrogel Films

Tian, Ye1; Gao, Xiaoying1; Hong, Wei2,4,5; Du, Miao1; Pan, Pengju3; Sun, Jing Zhi1; Wu, Zi Liang1; Zheng, Qiang1

2018-10-16

10.1021/acs.langmuir.8b02626

LANGMUIR   影响因子和分区

0743-7463

In a previous work (ACS Appl. Mater. Interfaces 2017, 9, 34349-34355), a facile approach was reported to prepare thin hydrogel films based on the Marangoni effect. After dripping onto a water surface, a drop of ethanol solution of poly(stearyl acrylate-co-acrylic acid) [P(SA-co-AAc)] spread quickly to form a thin film. The solvent exchange from ethanol to water led to the gelation of polymer solution which turned into a hydrogel film. Here, we investigate the scenario and seek for the governing kinetics of the Marangoni effect-assisted preparation of hydrogel films. By incorporating aggregation-induced emission fluorogens into the P(SA-co-AAc) solution, so that fluorescence appears at the gel state, we found that the spreading usually completed before the full gelation of the entire film. The spreading and formation of the gel films were influenced by the molar fraction of SA, f, and the polymer concentration of ethanol solution, C-p. The spreading was blocked when C-p was too high, whereas the film was fragmented into small pieces when C-p was too low. At an intermediate C-p, uniform hydrogel films were obtained. Steady spreading at a constant speed was observed during the processes which yielded uniform hydrogel films. Both C-p and f influenced the spreading process by tuning the surface tension of the ethanol solution and the viscoelasticity of the gelated film, as suggested by our theoretical model. This work provided kinetic insights into the Marangoni phenomena of viscous polymer solutions. The strategy and principle should be applicable to other systems on preparing thin supramolecular gel films with versatile functions.

SCI ; EI

英语

通讯

National Natural Science Foundation of China[51773179]

Chemistry ; Materials Science

Chemistry, Multidisciplinary ; Chemistry, Physical ; Materials Science, Multidisciplinary

WOS:000447816200010

AMER CHEMICAL SOC

20184205948821

Ethanol ; Gelation ; Hydrogels ; Kinetics ; Metallic films ; Organic solvents ; Polymer films ; Ultrathin films

Chemical Operations:802.3 ; Chemical Products Generally:804 ; Organic Compounds:804.1 ; Polymeric Materials:815.1 ; Classical Physics; Quantum Theory; Relativity:931

CHEMISTRY

Web of Science

1.Zhejiang Univ, Minist Educ, Key Lab Macromol Synth & Functionalizat, Dept Polymer Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China
2.Zhejiang Univ, Dept Engn Mech, Hangzhou 310027, Zhejiang, Peoples R China
3.Zhejiang Univ, State Key Lab Chem Engn, Coll Chem & Biol Engn, Hangzhou 310027, Zhejiang, Peoples R China
4.Southern Univ Sci & Technol, Dept Mech & Aerosp Engn, Shenzhen 518055, Peoples R China
5.Hokkaido Univ, Global Inst Collaborat Res & Educ, Global Stn Soft Matter, Sapporo, Hokkaido 0600810, Japan

Tian, Ye,Gao, Xiaoying,Hong, Wei,et al. Kinetic Insights into Marangoni Effect-Assisted Preparation of Ultrathin Hydrogel Films[J]. LANGMUIR,2018,34(41):12310-12317.

Tian, Ye.,Gao, Xiaoying.,Hong, Wei.,Du, Miao.,Pan, Pengju.,...&Zheng, Qiang.(2018).Kinetic Insights into Marangoni Effect-Assisted Preparation of Ultrathin Hydrogel Films.LANGMUIR,34(41),12310-12317.

Tian, Ye,et al."Kinetic Insights into Marangoni Effect-Assisted Preparation of Ultrathin Hydrogel Films".LANGMUIR 34.41(2018):12310-12317.