Hydrophobic Hydrogels with Fruit-Like Structure and Functions

Guo, Hui1,2; Nakajima, Tasuku1,2,3; Hourdet, Dominique2,4; Marcellan, Alba2,4; Creton, Costantino2,4; Hong, Wei2,5; Kurokawa, Takayuki1,2; Gong, Jian Ping1,2,3

2019-06

10.1002/adma.201900702

ADVANCED MATERIALS   影响因子和分区

0935-9648

1521-4095

Normally, a polymer network swells in a good solvent to form a gel but the gel shrinks in a poor solvent. Here, an abnormal phenomenon is reported: some hydrophobic gels significantly swell in water, reaching water content as high as 99.6 wt%. Such abnormal swelling behaviors in the nonsolvent water are observed universally for various hydrophobic organogels containing omniphilic organic solvents that have a higher affinity to water than to the hydrophobic polymers. The formation of a semipermeable skin layer due to rapid phase separation, and the asymmetric diffusion of water molecules into the gel driven by the high osmotic pressure of the organic solvent-water mixing, are found to be the reasons. As a result, the hydrophobic hydrogels have a fruit-like structure, consisting of hydrophobic skin and water-trapped micropores, to display various unique properties, such as significantly enhanced strength, surface hydrophobicity, and antidrying, despite their extremely high water content. Furthermore, the hydrophobic hydrogels exhibit selective water absorption from concentrated saline solutions and rapid water release at a small pressure like squeezing juices from fruits. These novel functions of hydrophobic hydrogels will find promising applications, e.g., as materials that can automatically take the fresh water from seawater.

asymmetric diffusion hydrophobic hydrogels phase separation seawater desalination semipermeable skin

SCI ; EI

英语

NI期刊

其他

JSPS KAKENHI[JP17H06144] ; JSPS KAKENHI[17H06376]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000475269900013

WILEY-V C H VERLAG GMBH

20192006939818

Desalination ; Fruits ; Hydrogels ; Hydrophobicity ; Molecules ; Organic polymers ; Organic solvents ; Osmosis ; Phase separation ; Seawater ; Swelling

Water Treatment Techniques:445.1 ; Seawater, Tides and Waves:471.4 ; Chemical Operations:802.3 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Organic Polymers:815.1.1 ; Agricultural Products:821.4 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Atomic and Molecular Physics:931.3 ; Materials Science:951

MATERIALS SCIENCE

Web of Science

1.Hokkaido Univ, Fac Adv Life Sci, Lab Soft & Wet Matter, Kita Ku, N21W11, Sapporo, Hokkaido 0010021, Japan
2.Hokkaido Univ, Global Stn Soft Matter, Global Inst Collaborat Res & Educ GI CoRE, Kita Ku, N21W11, Sapporo, Hokkaido 0010021, Japan
3.Hokkaido Univ, Inst Chem React Design & Discovery WPI ICReDD, Kita Ku, N21W10, Sapporo, Hokkaido 0010021, Japan
4.Sorbonne Univ, PSL Univ, ESPCI Paris, Lab Sci & Ingn Matiere Molle,CNRS, F-75005 Paris, France
5.Southern Univ Sci & Technol, Dept Mech & Aerosp Engn, Shenzhen 518055, Guangdong, Peoples R China

Guo, Hui,Nakajima, Tasuku,Hourdet, Dominique,et al. Hydrophobic Hydrogels with Fruit-Like Structure and Functions[J]. ADVANCED MATERIALS,2019,31(25).

Guo, Hui.,Nakajima, Tasuku.,Hourdet, Dominique.,Marcellan, Alba.,Creton, Costantino.,...&Gong, Jian Ping.(2019).Hydrophobic Hydrogels with Fruit-Like Structure and Functions.ADVANCED MATERIALS,31(25).

Guo, Hui,et al."Hydrophobic Hydrogels with Fruit-Like Structure and Functions".ADVANCED MATERIALS 31.25(2019).