A kind of gel synthesized by transition metal and vitamin C double catalytic system and its preparation method
A technology of transition metals and transition metal salts, applied in the field of gels synthesized by transition metals and vitamin C dual catalytic systems and its preparation, can solve the problems of limiting the large-scale application of hydrogels, time-consuming, and complexity
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[0018] The invention provides a method for preparing a gel synthesized by a transition metal and vitamin C dual catalyst system, comprising the following steps:
[0019] a), mixing the deep eutectic solvent, the transition metal salt, and vitamin C uniformly to obtain solution A; the deep eutectic solvent includes betaine and alcohol compounds;
[0020] b), acrylic acid, initiator, solution A, solution B and deep eutectic solvent are mixed and reacted to obtain a gel.
[0021] In the present invention, the deep eutectic solvent is uniformly mixed with the transition metal salt and vitamin C to obtain solution A; the deep eutectic solvent includes betaine and alcohol compounds.
[0022] In the present invention, the deep eutectic solvent includes betaine and alcohol compounds; the alcohol compounds are preferably selected from ethylene glycol and / or glycerin. The molar ratio of the betaine to the alcohol compound is preferably 1:2.5-3.5, more preferably 1:3.
[0023] Describe...
Embodiment 1
[0035] 1) DES was prepared by simply mixing betaine and ethylene glycol at a molar ratio of 1:3, and heating the mixture at 60 °C under continuous stirring until a clear solution was formed, then stored in a desiccator for future use.
[0036] (2) Preparation of gel: First, add 0.3g FeCl to 9.7g DES 3 and 0.01g VC to form a homogeneous solution, and store it for future use (solution A); then dissolve 0.04g ammonium persulfate in water of different volumes, and store it for future use (solution B); finally, stir in an ice bath Add acrylic acid, solution A and solution B into DES, and after stirring, the monomers polymerize into a gel.
[0037] For the convenience of expression, the DES gel is named Gel-xFe 3+ / yH 2 O, where x and y represent Fe 3+ and H 2 The mass fraction of O. With Gel-0.3Fe 3+ / 2.5H 2 O and Gel-0.3Fe 3+ / 9.3H 2 O as an example, dissolve 0.04g ammonium persulfate in 0.25ml and 1ml H 2 After O (solution B), mix 2.7ml of acrylic acid with 1g of soluti...
Embodiment 2
[0043] This embodiment tests the conductivity of the gel prepared in Example 1 at different temperatures, such as figure 2 As shown, the conductivity of the DES gel between 0°C and 90°C is 0.1Sm -1 to 1.3S m -1 . The graph of the test results shows that the electrical conductivity increases significantly with the increase of temperature. The higher the water content and iron content, the greater the conductivity of the gel.
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