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A kind of notch insensitive tough hydrogel and preparation method thereof
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A hydrogel, sensitive technology, applied in the field of notch-insensitive strong hydrogel and its preparation
Inactive Publication Date: 2016-05-11
CHANGCHUN UNIV OF TECH
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Problems solved by technology
[0010] However, few patents on notch-insensitive hydrogels have been reported
Method used
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Embodiment 1
[0053] (1) Dispersion of surfactants
[0054] At room temperature, weigh 0.8 g of sodium lauryl sulfate and 10 mL of deionized water, add them into a beaker, and stir well until the solution is clear and transparent.
[0055] (2) Dissolution of hydrophobic group monomer
[0056] Weigh 0.1 g of 22 methacrylate and add it to the solution in step (1), and stir well until the solution is transparent and clear.
[0057] (3) Dissolution of hydrophilic monomers and initiators
[0058] Weigh 2 g of acrylamide and 0.01 g of potassium persulfate, add them into the solution prepared in step (2), and stir thoroughly for 5 min.
[0059] (4) Preparation of notch-insensitive tough hydrogel
[0060] In step (3) solution, quickly add 0.07mL containing FeCl 2 aqueous solution (FeCl 2 Concentration is 10%), promptly obtains the notch insensitive tough hydrogel of stress (tensile strength) 6.2Kpa, strain (elongation at break) 1390%.
Embodiment 2
[0062] (1) Dispersion of surfactants
[0063] At room temperature, weigh 0.8 g of sodium lauryl sulfate and 10 mL of deionized water, add them into a beaker, and stir well until the solution is clear and transparent.
[0064] (2) Dissolution of hydrophobic group monomer
[0065] Weigh 0.2 g of 22 methacrylate and add it to the solution in step (1), and stir well until the solution is transparent and clear.
[0066] (3) Dissolution of hydrophilic monomers and initiators
[0067] Weigh 2 g of acrylamide and 0.01 g of potassium persulfate, add them into the solution prepared in step (2), and stir thoroughly for 5 min.
[0068] (4) Preparation of notch-insensitive tough hydrogel
[0069] In step (3) solution, quickly add 0.07mL containing FeCl 2 aqueous solution (FeCl 2 Concentration is 10%), promptly obtains the notch insensitive tough hydrogel of stress (tensile strength) 55.9Kpa, strain (elongation at break) 1582%.
Embodiment 3
[0071] (1) Dispersion of surfactants
[0072] At room temperature, weigh 0.8 g of sodium lauryl sulfate and 10 mL of deionized water, add them into a beaker, and stir well until the solution is clear and transparent.
[0073] (2) Dissolution of hydrophobic group monomer
[0074] Weigh 0.3 g of 22 methacrylate and add it to the solution in step (1), and stir well until the solution is transparent and clear.
[0075] (3) Dissolution of hydrophilic monomers and initiators
[0076] Weigh 2 g of acrylamide and 0.01 g of potassium persulfate, add them into the solution prepared in step (2), and stir thoroughly for 5 min.
[0077] (4) Preparation of notch-insensitive tough hydrogel
[0078] In step (3) solution, quickly add 0.07mL containing FeCl 2 aqueous solution (FeCl 2 Concentration is 10%), promptly obtains the notch insensitive tough hydrogel of stress (tensile strength) 98.5Kpa, strain (elongation at break) 1530%.
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Abstract
The invention relates to a notch-insensitive strengthening-toughening hydrogel and a preparation method thereof and belongs to the technical field of polymer hydrogels. The notch-insensitive strengthening-toughening hydrogel prepared by the preparation method has better properties than the traditional chemical crosslinking hydrophobic association hydrogel. The preparation method comprises the following steps of dispersing hydrophobic group monomers in water under the action of a surfactant to form micellae in water; by free radicals generated by a redox initiator system, copolymerizing the hydrophobic group monomers and hydrophilic monomers; simultaneously oxidizing Fe<2+> into Fe<3+>, and enabling Fe<3+> and a polymer to form a complex to obtain the notch-insensitive strengthening-toughening hydrogel. Experiments show that by the complexing effect of the metal ion and the polymer, the tensile property and toughness of the hydrophobic association hydrogel are significantly enhanced as compared to those of the chemical crosslinking hydrophobic association hydrogel.
Description
technical field [0001] The invention belongs to the technical field of polymer hydrogel, and relates to a notch insensitive tough hydrogel and a preparation method thereof. Background technique [0002] Hydrogel is a water-soluble or hydrophilic polymer, a type of polymer with a three-dimensional network structure formed by certain chemical cross-linking or physical cross-linking, which can absorb a large amount of water in water and swell, and after swelling It can continue to maintain its original structure without being dissolved. Hydrogels have been widely used in the fields of biomedicine, industrial supplies, agricultural civil engineering, and cosmetics, especially in the fields of artificial cartilage, drug delivery, biosensors, and tissue engineering in the biomedical field. [0003] However, due to their poor mechanical properties, most hydrogels are easily brittle under the action of external force, and the application range is severely limited. For example, poly...
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Application Information
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