Acrylamide

Example 2

Materials: m-acrylamido phenylboronic acid, and the structure was as follow:

[Figure (not displayed)]

N-[Tris(hydroxymethyl)methyl]acrylamide was purchased from Alfa Aesar, and the structure as follow:

[Figure (not displayed)]

Acrylamide (AAm) was purchased from J&K. Ammonium persulfate and N,N,N′,N′-tetramethylethylenediamine were purchased from Sinopharm. Diphenyliodonium nitrate was purchased from Aladdin.

Preparation: 446 mg acrylamide, 60 mg m-acrylamido phenylboronic acid and 55 mg N-[Tris(hydroxymethyl)methyl]acrylamide were dissolved in the 5 ml deionized water. After fully dissolved, 100 μL Ammonium persulfate and 10 μL N,N,N′,N′-tetramethylethylenediamine were added into the solution. The solution was transferred to a sealed glass vessel quickly. 24 hours later, the resulting gel was immersed in a solution which contains the diphenyliodonium nitrate (control the pH=10) for 24 hours. The gel was frozen by a cooling stage. Under the freezing condition, the gel was exposed by UV irradiation integrally for 5 min. After thawing, the gel swelled in the water to obtain porous gels. The laser scanning confocal microscope was applied to characterize the pore structure of the porous gel.

Example 4

Materials: Acrylamido cyclodextrin, and the structure was as follow:

[Figure (not displayed)]

Acrylamido azobenzene, and the structure was as follow:

[Figure (not displayed)]

Acrylamide (AAm) purchased from J&K. Ammonium persulfate and N,N,N′,N′-tetramethylethylenediamine purchased from Sinopharm.

Preparation: 100 mg Acrylamide, 60 mg acrylamido cyclodextrin and 10 mg acrylamido azobenzene were dissolved in the 5 ml deionized water. After fully dissolved, 100 μL ammonium persulfate and 10 μL N,N,N′,N′-tetramethylethylenediamine were added into the solution. The solution was transferred to a sealed glass vessel quickly. 24 hour later, the resulting hydrogel was immersed in the deionized water for 24 hours. The hydrogel was frozen by a cooling stage. Under the freezing condition, the hydrogel was exposed by UV irradiation integrally for 5 min. After thawing, the hydrogel swelled in the water to obtain the porous hydrogels. The laser scanning confocal microscope was applied to characterize the pore structure of the porous gel.

Example 1

Materials: Acrylamide (AAm) and 2-hydroxy-4′-(2-hydroxyethoxy)-2-methyl propiophenone (12959) purchased from J&K. N,N′-bis(acryloyl) cystamine (BISAC) purchased from Alfa Aesar. Ammonium persulfate and N,N,N′,N′-tetramethylethylenediamine purchased from Sinopharm.

Preparation: 500 mg Acrylamide and 5 mg N,N′-bis(acryloyl) cystamine were dissolved in 5 ml deionized water. After fully dissolved, 100 μL ammonium persulfate and 10 μL N,N,N′,N′-tetramethylethylenediamine were added into the solution. The solution was transferred to a sealed glass vessel quickly. 24 hour later, the resulting gel was immersed in a solution which contains the 2-hydroxy-4′-(2-hydroxyethoxy)-2-methyl propiophenone (photo-catalyst) for 24 h. The gel was frozen by a cooling stage. Under the freezing condition, the gel was exposed by UV irradiation integrally for 5 min. After thawing, the gel swelled in the deionized water to obtain porous gels. The laser scanning confocal microscope was applied to characterize the pore structure of the obtained gel.