Preparation method of supramolecular polymer films with humidity response and recyclability
A supramolecular polymer and film technology, applied in the chemical field, can solve the problems of multi-step preparation process and few polymer networks, and achieve wide application prospects, good humidity responsiveness and recyclability, improved and enriched functions The effect of sexual characteristics
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Embodiment 1
[0046] With 10g lipoic acid (in formula I, n is 3, R 1 for hydrogen, R 2 Hydrogen) powder and 1.94g sodium hydroxide powder (the molar ratio of lipoic acid and sodium hydroxide is 1:1) was dissolved in a mixed solution of 110mL ethanol and water, the volume ratio of ethanol and water was 10:1, and heated to reflux for 1h , filtered and dried to obtain sodium lipoate powder.
[0047] 5g of sodium lipoic acid powder was dissolved in 5mL of water at a temperature of 70°C, and the yellow solution was coated on a glass substrate by spin coating and evaporated for 4 hours, and formed into a film in an air environment at a temperature of 25°C to obtain the described Supramolecular Polymer Films-1.
[0048] The molecular structure and outward appearance diagram of supramolecular polymer and supramolecular polymer film provided by the present invention are as follows: figure 1 as shown, figure 1 It is the molecular structure and appearance diagram of supramolecular polymer and supram...
Embodiment 2~24
[0054] Change the kind of alkali, raw material ratio (molar ratio of lipoic acid and alkali), alcohol-water mixed solution volume ratio, reflux time, film-forming temperature to obtain different supramolecular polymer films respectively, other are the same as embodiment 1, see table 1 for details .
[0055] Table 1
[0056]
Embodiment 25~33
[0058] Change the lipoic acid derivative type, the type of alkali, the raw material ratio (the molar ratio of lipoic acid and alkali), the volume ratio of the alcohol-water mixture, the reflux time, and the film-forming temperature to obtain different supramolecular polymer films respectively, and the others are the same as in the examples 1, see Table 2 for details.
[0059] Table 2
[0060]
[0061] Described lipoic acid derivative is shown in structural formula II:
[0062]
[0063] R 1 for hydrogen or C 1 ~C 4 Straight chain or branched chain alkyl, R 2 Is hydrogen or carboxyl (-COOH), n is an integer from 1 to 5, R 3 C containing carboxyl 1 ~C 15 Straight chain or branched alkylamino group, C containing carboxyl group 1 ~C 15 Straight chain or branched aryl, C containing carboxyl 1 ~C 15 Straight chain or branched chain alkyl.
[0064] The preparation method of the compound shown in the formula II comprises the following steps:
[0065] Mix lipoic acid ...
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