CN110684164A - High-compression-strength gelatin/PAM double-network hydrogel and preparation method thereof - Google Patents
High-compression-strength gelatin/PAM double-network hydrogel and preparation method thereof Download PDFInfo
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- CN110684164A CN110684164A CN201911005932.4A CN201911005932A CN110684164A CN 110684164 A CN110684164 A CN 110684164A CN 201911005932 A CN201911005932 A CN 201911005932A CN 110684164 A CN110684164 A CN 110684164A
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Abstract
The high-compressive strength gelatin/PAM double-network hydrogel and the preparation method thereof overcome the problems of complex process, long time consumption and difficult control of monomer molar ratio of the existing preparation method. The technical scheme of the invention is as follows: dissolving gelatin in water to obtain a solution A, adding acrylamide, potassium persulfate and N, N-methylene bisacrylamide into the solution A, and then raising the temperature to 60 ℃ for 3-5 h; after the reaction is finished, reducing the temperature to 4 ℃, and standing for 1 h; the gelatin/PAM double-network hydrogel with high compressive strength is prepared. The preparation method provided by the invention has simple steps, and the prepared gelatin/PAM double-network hydrogel with high compressive strength has better compressive property and shows excellent self-recovery performance.
Description
Technical Field
The invention belongs to the field of double-network hydrogel, and particularly relates to high-compression-strength gelatin/PAM double-network hydrogel and a preparation method thereof.
Background
Gelatin as a class of proteins has the performance of dissolving at high temperature and forming gel at low temperature, hydrogel formed by the gelatin has very weak mechanical properties, and the research on hydrogel mainly based on gelatin in recent years has not made a major breakthrough in the aspect of mechanical properties.
A double-network hydrogel is a special interpenetrating network of polymers formed from two polymers with strong structural asymmetry. The mechanical strength and toughness of DN gels are surprisingly improved over single polymer networks (SN gels), primarily as a result of the entanglement and interpenetration of a first (rigid and brittle) and a second (soft and tough) network of strong symmetry. However, when a double-network (DN) hydrogel is synthesized, the double-network (DN) hydrogel is usually obtained by a two-step method, and the synthesis involves swelling, diffusion, and two-step polymerization-initiating processes, which are complicated, time-consuming, and difficult to control the monomer molar ratio, so that the mechanical properties of each batch of products cannot be kept consistent, and the complexity of the synthesis steps leads to a severe requirement for the application field.
Disclosure of Invention
The invention aims to provide a high-compression-strength gelatin/PAM double-network hydrogel and a preparation method thereof.
In order to achieve the purpose, the preparation method of the gelatin/PAM double-network hydrogel with high compressive strength provided by the invention comprises the following steps:
dissolving 24 parts by weight of gelatin into 100 parts by weight of water to obtain a solution A, adding 36 parts by weight of acrylamide AM, 0.13 part by weight of potassium persulfate KPS and 0.03 part by weight of N, N-methylene bisacrylamide MBA into the solution A, and then raising the temperature to 60 ℃ for 3-5 hours; after the reaction is finished, reducing the temperature to 4 ℃, and standing for 1 h; the gelatin/PAM double-network hydrogel with high compressive strength is prepared.
The gelatin/PAM double-network hydrogel with high compressive strength is prepared by the preparation method.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the high-compression-strength double-network hydrogel is prepared by adopting a one-pot method, the synthesis complexity is simplified, and the prepared high-compression-strength gelatin/PAM double-network hydrogel has better compression resistance and shows excellent self-recovery performance.
Drawings
FIG. 1 is a compressive stress-strain curve of gelatin/PAM double-network hydrogel.
FIG. 2 is a shape memory picture of gelatin/PAM double-network hydrogel.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the embodiments of the present invention include, but are not limited to, the scope shown in the following examples.
Example 1
Dissolving 2.4g of gelatin into 10mL of water, adding 3.6g of acrylamide AM, 0.013g of potassium persulfate KPS, 0.003g N, N-methylene bisacrylamide MBA and the obtained gelatin solution into a mold, standing at the temperature of 60 ℃ for 3 hours, discharging, placing at the temperature of 4 ℃ for 1 hour, and taking out to obtain the high-compression-strength gelatin/PAM double-network hydrogel.
Example 2
Dissolving 24g of gelatin into 100mL of water, adding 36g of acrylamide AM, 0.13g of potassium persulfate KPS, 0.03g N, N-methylene bisacrylamide MBA and the obtained gelatin solution into a mold, standing at the temperature of 60 ℃ for 3h, discharging, placing at the temperature of 4 ℃ for 1h, and taking out to obtain the high-compression-strength gelatin/PAM double-network hydrogel.
Example 3
Dissolving 24g of gelatin into 100mL of water, adding 36g of acrylamide AM, 0.13g of potassium persulfate KPS, 0.03g N, N-methylene bisacrylamide MBA and the obtained gelatin solution into a mold, standing at the temperature of 60 ℃ for 4 hours, discharging, placing at the temperature of 4 ℃ for 1 hour, and taking out to obtain the high-compression-strength gelatin/PAM double-network hydrogel.
Example 4
Dissolving 24g of gelatin into 100mL of water, adding 36g of acrylamide AM, 0.13g of potassium persulfate KPS, 0.03g N, N-methylene bisacrylamide MBA and the obtained gelatin solution into a mold, standing at the temperature of 60 ℃ for 5 hours, discharging, placing at the temperature of 4 ℃ for 1 hour, and taking out to obtain the high-compression-strength gelatin/PAM double-network hydrogel.
In order to test the performance of the prepared gelatin/PAM double-network hydrogel, the following analysis tests are carried out, and the analysis results are as follows:
shown in figure 1 are the compression test curves for gelatin, PAM, gelatin/PAM double network hydrogels. As can be seen from the figure, the compressive strength of the gelatin/PAM double-network hydrogel is 70.1M Pa, which is 1200 times that of the pure gelatin hydrogel and 5.84 times that of the pure PAM hydrogel, which shows that the compressive strength of the gelatin/PAM double-network hydrogel is obviously improved. Therefore, the gelatin/PAM double-network hydrogel has better compression resistance.
As shown in FIG. 2, the obtained gelatin/PAM double-network hydrogel was twisted and left to stand at 4 ℃ for 30 min to fix the bent shape and temporarily form the shape while the hydrogel was changed from translucent to opaque. When the hydrogel with the fixed shape is placed in hot water of 45 ℃, the hydrogel gradually recovers the shape under the driving of the temperature, and the hydrogel shows excellent self-recovery performance.
The invention is not limited to the examples, and any equivalent changes to the technical solution of the invention by a person skilled in the art after reading the description of the invention are covered by the claims of the invention.
Claims (2)
1. A preparation method of high compression strength gelatin/PAM double-network hydrogel is characterized in that:
the method comprises the following steps:
dissolving 24 parts by weight of gelatin into 100 parts by weight of water to obtain a solution A, adding 36 parts by weight of acrylamide AM, 0.13 part by weight of potassium persulfate KPS and 0.03 part by weight of N, N-methylene bisacrylamide MBA into the solution A, and then raising the temperature to 60 ℃ for 3-5 hours; after the reaction is finished, reducing the temperature to 4 ℃, and standing for 1 h; the gelatin/PAM double-network hydrogel with high compressive strength is prepared.
2. A high compressive strength gelatin/PAM double network hydrogel prepared by the method of claim 1.
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| CN201911005932.4A CN110684164A (en) | 2019-10-22 | 2019-10-22 | High-compression-strength gelatin/PAM double-network hydrogel and preparation method thereof |
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| CN201911005932.4A CN110684164A (en) | 2019-10-22 | 2019-10-22 | High-compression-strength gelatin/PAM double-network hydrogel and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113274543A (en) * | 2021-05-19 | 2021-08-20 | 吉林大学 | Preparation method and application of novel adhesive antibacterial temperature-tolerant functional hydrogel |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103739861A (en) * | 2014-01-02 | 2014-04-23 | 河南理工大学 | Preparation method of high-strength hydrogel |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103739861A (en) * | 2014-01-02 | 2014-04-23 | 河南理工大学 | Preparation method of high-strength hydrogel |
Non-Patent Citations (4)
| Title |
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| MOHAMED MOHAMADY GHOBASHY等: "Radiation Crosslinking of Modifying Super Absorbent (Polyacrylamide/Gelatin) Hydrogel as Fertilizers Carrier and Soil Conditioner", 《JOURNAL OF POLYMERS AND THE ENVIRONMENT》 * |
| MOHAMED MOHAMADY GHOBASHY等: "Radiation Crosslinking of Modifying Super Absorbent (Polyacrylamide/Gelatin) Hydrogel as Fertilizers Carrier and Soil Conditioner", 《JOURNAL OF POLYMERS AND THE ENVIRONMENT》, 14 July 2018 (2018-07-14), pages 3981, XP036566394, DOI: 10.1007/s10924-018-1273-9 * |
| 黄铂扬等: "高耐压强度互穿双网络水凝胶的抗压性能研究", 《广东石油化工学院学报》 * |
| 黄铂扬等: "高耐压强度互穿双网络水凝胶的抗压性能研究", 《广东石油化工学院学报》, no. 03, 30 June 2017 (2017-06-30), pages 8 - 12 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113274543A (en) * | 2021-05-19 | 2021-08-20 | 吉林大学 | Preparation method and application of novel adhesive antibacterial temperature-tolerant functional hydrogel |
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Application publication date: 20200114 |