阅读说明：本技术 一锅法制备的二次掺杂型氧化石墨烯/碱溶壳聚糖-聚苯胺-聚丙烯酰胺复合导电水凝胶 (Secondary doped graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite conductive hydrogel prepared by one-pot method ) 是由 王征科 金晓强 姜慧虹 傅倍佳 鲍晓炯 乔丰慧 胡巧玲 于 2019-11-01 设计创作，主要内容包括：本发明公开了一种一锅法制备的二次掺杂型氧化石墨烯/碱溶壳聚糖-聚苯胺-聚丙烯酰胺复合导电水凝胶。该方法先将苯胺、植酸和过硫酸铵聚合得到聚苯胺,并溶解待用；再将壳聚糖粉末在一水合氢氧化锂、尿素和氧化石墨烯的混合水溶液中溶解得到氧化石墨烯/碱溶壳聚糖溶液；依次加入聚苯胺/N-甲基吡咯烷酮溶液、丙烯酰胺、N,N′-亚甲基双丙烯酰胺、过硫酸铵,聚合得到复合水凝胶；转移至植酸溶液中再进行二次掺杂,得到高强度氧化石墨烯/碱溶壳聚糖-聚苯胺-聚丙烯酰胺复合导电水凝胶材料。二次掺杂过程可实现对水凝胶电导率的提升,以及对凝胶机械性能的调整。该材料由于具有优异的力学性能和导电性能,有望应用于电子皮肤、柔性电子器件等领域。(The invention discloses a secondary doped graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite conductive hydrogel prepared by a one-pot method. Firstly, polymerizing aniline, phytic acid and ammonium persulfate to obtain polyaniline, and dissolving the polyaniline for later use; dissolving chitosan powder in a mixed aqueous solution of lithium hydroxide monohydrate, urea and graphene oxide to obtain a graphene oxide/alkali-soluble chitosan solution; sequentially adding polyaniline/N-methylpyrrolidone solution, acrylamide, N' -methylene bisacrylamide and ammonium persulfate, and polymerizing to obtain composite hydrogel; and transferring the mixture into a phytic acid solution and then carrying out secondary doping to obtain the high-strength graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite conductive hydrogel material. The secondary doping process can realize the improvement of the conductivity of the hydrogel and the adjustment of the mechanical property of the hydrogel. The material is expected to be applied to the fields of electronic skins, flexible electronic devices and the like due to excellent mechanical properties and conductivity.)

1. A secondary doped graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite conductive hydrogel prepared by a one-pot method is characterized in that: the conductive hydrogel material is prepared by a one-pot method by taking alkali-soluble chitosan hydrogel as a matrix, graphene oxide as a nano reinforcing component, polyaniline as a conductive component and polyacrylamide as a reinforcing and toughening component, and then soaking the conductive hydrogel material into a phytic acid solution to carry out secondary doping on the polyaniline.

2. The one-pot method for preparing the secondary doped graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite hydrogel according to claim 1, wherein the one-pot method comprises the following steps: the one-pot method specifically comprises the following steps: adding polyaniline/N-methylpyrrolidone solution, acrylamide, N' -methylene bisacrylamide and ammonium persulfate into the graphene oxide/alkali-soluble chitosan solution, uniformly stirring, casting the mixture into a mold after centrifugal deaeration, and transferring the mold into an oven at the temperature of 60-80 ℃ for reaction for 4 hours to obtain the graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite hydrogel.

3. The one-pot method for preparing the secondary doped graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite conductive hydrogel according to claim 2, wherein the addition ratio of the graphene oxide/alkali-soluble chitosan solution, the polyaniline/N-methylpyrrolidone solution, the acrylamide, the N, N' -methylenebisacrylamide and the ammonium persulfate is 20 mL: 5mL of: 1-10 g: 0.02-1 g: 0.02-1g, wherein the concentration of polyaniline in the polyaniline/N-methylpyrrolidone solution is 0.01-0.2%.

4. The one-pot method for preparing the secondary doped graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite conductive hydrogel according to claim 2, wherein the polyaniline/N-methylpyrrolidone solution is prepared by the following steps: weighing the following components in percentage by mass: preparing 1-10% aniline monomer, 1-20% phytic acid and the balance of water into a solution, uniformly stirring, and adding ammonium persulfate accounting for 0.05-0.5% of the mass percent of the solution as an initiator to initiate aniline polymerization; after the reaction is finished, dialyzing polyaniline by using deionized water until the pH value is 7, performing suction filtration, and drying; and finally, dissolving polyaniline by using N-methylpyrrolidone, wherein the concentration of the polyaniline is 0.01-0.2%.

5. The one-pot method for preparing the secondary doped graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite conductive hydrogel according to claim 2, wherein the preparation method of the graphene oxide/alkali-soluble chitosan solution comprises the following steps: weighing the following components in percentage by mass: 2% of chitosan, 8% of lithium hydroxide monohydrate, 6% of urea, 0.15% of graphene oxide and the balance of water; the molecular weight of the chitosan is 2000000; after the components are mixed and swelled, the graphene oxide/alkali-soluble chitosan solution is prepared through multiple freezing-unfreezing processes.

6. The one-pot method for preparing the secondary doped graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite conductive hydrogel according to claim 2, wherein after the one-pot method is used for preparing the graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite hydrogel, the graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite hydrogel is immersed in a phytic acid solution with the mass fraction of 1-20 wt% for at least 2 hours for secondary doping of polyaniline, meanwhile, phytic acid is used as a co-crosslinking agent for the chitosan, the polyaniline and the polyacrylamide for crosslinking, and finally deionized water is used for dialysis until the pH value is 7, so that the graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite conductive hydrogel material is obtained.

Technical Field

The invention belongs to the field of preparation of conductive hydrogel, and particularly relates to secondary doped graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite conductive hydrogel prepared by a one-pot method and a preparation method thereof.

Background

Smart materials have the same stretching, sensing and bending capabilities as skin and have found a wide variety of applications in interacting with the human body. The conductive hydrogel is considered to be used for preparing the flexible electronic skin material due to the high water content and the structure similar to human soft tissue. Many current conductive hydrogel materials are prepared from conductive polymers as raw materials. Because the polyaniline has the characteristics of easily obtained raw materials, simple synthesis process, good chemical and environmental stability and the like, the polyaniline is widely applied in the field. However, the processing property and film-forming property of polyaniline are poor, and the mechanical property is not ideal, so that the further development of the material is greatly limited.

The chitosan as the second most natural polysaccharide material in nature has the characteristics of excellent biocompatibility, degradability and the like, and has great application prospects in the fields of tissue engineering, biomedical materials and the like. And when the alkali-soluble chitosan hydrogel material having higher strength than the acid-soluble chitosan hydrogel is prepared, the chitosan shows greater application potential. Polyacrylamide is used as a polymer with flexible high molecular chains, and a hydrogel material prepared by using the polyacrylamide has excellent tensile property and flexibility. Chitosan and polyacrylamide are therefore ideal candidates for the preparation of electrically conductive hydrogel matrices. However, polyacrylamide has strong swelling performance and is easy to swell and break in aqueous solution.

Disclosure of Invention

The invention aims to provide a secondary doped graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite conductive hydrogel prepared by a one-pot method and a preparation method thereof, aiming at the defects of poor polyaniline processability and film-forming performance and poor mechanical property of corresponding conductive hydrogel.

The invention provides the following technical scheme for realization:

the conductive hydrogel material is prepared by a one-pot method by taking alkali-soluble chitosan hydrogel as a matrix, taking graphene oxide as a nano reinforcing component, taking polyaniline as a conductive component and taking polyacrylamide as a reinforcing and toughening component, and then soaking the conductive hydrogel material into a phytic acid solution to carry out secondary doping on the polyaniline.

In the above technical solution, further, the one-pot method specifically comprises: adding polyaniline/N-methylpyrrolidone solution, acrylamide, N' -methylene bisacrylamide and ammonium persulfate into the graphene oxide/alkali-soluble chitosan solution, uniformly stirring, casting the mixture into a mold after centrifugal deaeration, and transferring the mold into an oven at the temperature of 60-80 ℃ for reaction for 4 hours to obtain the graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite hydrogel.

Further, the addition ratio of the graphene oxide/alkali-soluble chitosan solution, the polyaniline/N-methylpyrrolidone solution, the acrylamide, the N, N' -methylene bisacrylamide and the ammonium persulfate is 20 mL: 5mL of: 1-10 g: 0.02-1 g: 0.02-1g, wherein the concentration of polyaniline in the polyaniline/N-methylpyrrolidone solution is 0.01-0.2%.

Further, the preparation process of the polyaniline/N-methylpyrrolidone solution is as follows: weighing the following components in percentage by mass: preparing 1-10% aniline monomer, 1-20% phytic acid and the balance of water into a solution, uniformly stirring, and adding ammonium persulfate accounting for 0.05-0.5% of the mass percent of the solution as an initiator to initiate aniline polymerization; after the reaction is finished, dialyzing polyaniline by using deionized water until the pH value is 7, performing suction filtration, and drying; and finally, dissolving polyaniline by using N-methylpyrrolidone, wherein the concentration of the polyaniline is 0.01-0.2%.

Further, the preparation method of the graphene oxide/alkali-soluble chitosan solution comprises the following steps: weighing the following components in percentage by mass: 2% of chitosan, 8% of lithium hydroxide monohydrate, 6% of urea, 0.15% of graphene oxide and the balance of water; the molecular weight of the chitosan is 2000000; after the components are mixed and swelled, the graphene oxide/alkali-soluble chitosan solution is prepared through multiple freezing-unfreezing processes.

Further, after the graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite hydrogel is prepared by a one-pot method, the graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite hydrogel is immersed in a phytic acid solution with the mass fraction of 1-20 wt% for at least 2 hours to carry out secondary doping on polyaniline, the phytic acid is used as a co-crosslinking agent of the chitosan, the polyaniline and the polyacrylamide to carry out crosslinking on the three, and finally deionized water is used for dialysis until the pH value is 7, so that the graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite conductive hydrogel material is obtained.

The preparation method comprises the steps of dissolving a polyaniline material in N-methyl pyrrolidone by using a one-pot blending method, mixing the polyaniline material with a polymer matrix with excellent mechanical property, and carrying out secondary doping on the polyaniline by using phytic acid to prepare a composite conductive hydrogel material; the graphene oxide is introduced into the alkali-soluble chitosan/polyacrylamide matrix, and by virtue of the high specific surface area and a large amount of oxygen-containing functional groups on the surface, the graphene oxide and the polymer generate strong physical interaction so as to realize the enhancement of the polymer matrix, and the excellent mechanical property is obtained while the swelling of polyacrylamide is inhibited.

Compared with the prior art, the invention has the following advantages:

1) the graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite hydrogel with the nanometer reinforced and interpenetrating polymer network structure is prepared by a one-pot method, and the preparation method is simple in process and easy to operate; the polyaniline is blended into a chitosan-acrylamide system in a solution form, so that the defects that the polyaniline is difficult to process and film are difficult to form are well overcome;

2) the alkali-soluble chitosan-polyacrylamide hydrogel is used as a matrix, the mechanical property is greatly improved compared with that of acid-soluble chitosan, and the hydrogel is endowed with excellent mechanical property; the addition of graphene oxide, which allows the gel not to break when swollen (caused by polyacrylamide) through physical interaction;

3) the phytic acid is used for carrying out secondary doping on the polyaniline in the hydrogel, so that the conductivity of the hydrogel is improved; meanwhile, phytic acid is used as a co-crosslinking agent, so that crosslinking of chitosan, polyaniline and polyacrylamide can be realized, and the tensile strength of the hydrogel is enhanced;

4) the conductivity of the hydrogel material changes along with the change of the stretching length of the gel, so that the hydrogel material has force sensitivity.

Detailed Description

The present invention is further illustrated by the following specific examples.

Example 1:

1) weighing the following components in percentage by mass: adding water into 5% aniline monomer and 8% phytic acid to prepare a solution, uniformly stirring, and adding 0.5% ammonium persulfate initiator to initiate aniline polymerization; after 4 hours, the reaction is finished, and the polyaniline is dialyzed by deionized water until the pH value is approximately equal to 7, filtered and dried; finally, dissolving polyaniline (the concentration of polyaniline is 0.1%) by using N-methylpyrrolidone for standby;

2) weighing the following components in percentage by mass: 2% of chitosan, 8% of lithium hydroxide monohydrate, 6% of urea, 0.15% of graphene oxide and the balance of water; the molecular weight of the chitosan is 2000000; mixing and swelling the components, and then freezing and unfreezing for multiple times to prepare a graphene oxide/alkali-soluble chitosan solution;

3) taking 20ml of the graphene oxide/alkali-soluble chitosan solution prepared in the step 2), sequentially adding 5ml of 0.01wt% of polyaniline/N-methylpyrrolidone solution, 3g of acrylamide, 0.07g N, N' -methylenebisacrylamide and 0.05g of ammonium persulfate, ultrasonically dispersing, uniformly stirring, centrifugally defoaming, casting in a mold, transferring into a 60 ℃ oven for reaction for 4 hours, then taking out, dialyzing and dehydrating to obtain the graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite hydrogel;

4) and (3) transferring the graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite hydrogel prepared in the step 3) into a 5 wt% phytic acid solution, soaking for 4 days to dope polyaniline for the second time, using the phytic acid as a co-crosslinking agent of the chitosan, the polyaniline and the polyacrylamide to crosslink the three, and finally dialyzing by using deionized water until the pH value is approximately equal to 7 to obtain the graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite conductive hydrogel material.

5) The tensile strength, elongation at break and electrical conductivity of the hydrogel were 1.27MPa, 381% and 0.008S/m, respectively.

Example 2:

1) weighing the following components in percentage by mass: adding water into 5% aniline monomer and 8% phytic acid to prepare a solution, uniformly stirring, and adding 0.5% ammonium persulfate initiator to initiate aniline polymerization; after 4 hours, the reaction is finished, and the polyaniline is dialyzed by deionized water until the pH value is approximately equal to 7, filtered and dried; finally, dissolving polyaniline (the concentration of polyaniline is 0.1%) by using N-methylpyrrolidone for standby;

2) weighing the following components in percentage by mass: 2% of chitosan, 8% of lithium hydroxide monohydrate, 6% of urea, 0.15% of graphene oxide and the balance of water; the molecular weight of the chitosan is 2000000; mixing and swelling the components, and then freezing and unfreezing for multiple times to prepare a graphene oxide/alkali-soluble chitosan solution;

3) taking 20ml of the graphene oxide/alkali-soluble chitosan solution prepared in the step 2), sequentially adding 5ml of 0.01wt% of polyaniline/N-methylpyrrolidone solution, 3g of acrylamide, 0.07g N, N' -methylenebisacrylamide and 0.05g of ammonium persulfate, ultrasonically dispersing, uniformly stirring, centrifugally defoaming, casting in a mold, transferring into a 60 ℃ oven for reaction for 4 hours, then taking out, dialyzing and dehydrating to obtain the graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite hydrogel;

4) and (3) transferring the graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite hydrogel prepared in the step 3) into a 20 wt% phytic acid solution, soaking for 4 hours to carry out secondary doping on polyaniline, simultaneously using the phytic acid as a co-crosslinking agent of the chitosan, the polyaniline and the polyacrylamide to crosslink the three, and finally dialyzing by using deionized water until the pH value is approximately equal to 7 to obtain the graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite conductive hydrogel material.

5) The tensile strength, elongation at break and electrical conductivity of the hydrogel were 1.57MPa, 173% and 0.049S/m, respectively. Compared to example 1, with the increase of the amount of phytic acid used in the secondary doping, the gel tensile strength and electrical conductivity were improved, but the elongation at break was decreased.

Example 3:

1) weighing the following components in percentage by mass: adding water into 5% aniline monomer and 8% phytic acid to prepare a solution, uniformly stirring, and adding 0.5% ammonium persulfate initiator to initiate aniline polymerization; after 4 hours, the reaction is finished, and the polyaniline is dialyzed by deionized water until the pH value is approximately equal to 7, filtered and dried; finally, dissolving polyaniline (the concentration of polyaniline is 0.1%) by using N-methylpyrrolidone for standby;

2) weighing the following components in percentage by mass: 2% of chitosan, 8% of lithium hydroxide monohydrate, 6% of urea, 0.15% of graphene oxide and the balance of water; the molecular weight of the chitosan is 2000000; mixing and swelling the components, and then freezing and unfreezing for multiple times to prepare a graphene oxide/alkali-soluble chitosan solution;

3) taking 20ml of the graphene oxide/alkali-soluble chitosan solution prepared in the step 2), sequentially adding 5ml of 0.01wt% of polyaniline/N-methylpyrrolidone solution, 3g of acrylamide, 0.07g N, N' -methylenebisacrylamide and 0.05g of ammonium persulfate, ultrasonically dispersing, uniformly stirring, centrifugally defoaming, casting in a mold, transferring into a 60 ℃ oven for reaction for 4 hours, then taking out, dialyzing and dehydrating to obtain the graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite hydrogel;

4) the tensile strength, elongation at break and conductivity of the hydrogel were 1.93MPa, 767% and 0.089mS/m, respectively. Compared to the hydrogels of examples 1,2, which were not subjected to the secondary doping step, both tensile strength and elongation at break were greater but the electrical conductivity was very low, since there was no acidic degradation process of the hydrogel components (chitosan, polyacrylamide) in phytic acid.

Example 4:

1) weighing the following components in percentage by mass: adding water into 5% aniline monomer and 8% phytic acid to prepare a solution, uniformly stirring, and adding 0.5% ammonium persulfate initiator to initiate aniline polymerization; after 4 hours, the reaction is finished, and the polyaniline is dialyzed by deionized water until the pH value is approximately equal to 7, filtered and dried; finally, dissolving polyaniline (the concentration of polyaniline is 0.1%) by using N-methylpyrrolidone for standby;

2) weighing the following components in percentage by mass: 2% of chitosan, 8% of lithium hydroxide monohydrate, 6% of urea, 0.15% of graphene oxide and the balance of water; the molecular weight of the chitosan is 2000000; mixing and swelling the components, and then freezing and unfreezing for multiple times to prepare a graphene oxide/alkali-soluble chitosan solution;

3) taking 20ml of the graphene oxide/alkali-soluble chitosan solution prepared in the step 2), sequentially adding 5ml of 0.01wt% of polyaniline/N-methylpyrrolidone solution, 3g of acrylamide, 0.07g N, N' -methylenebisacrylamide and 0.05g of ammonium persulfate, ultrasonically dispersing, uniformly stirring, centrifugally defoaming, casting in a mold, transferring into a 60 ℃ oven for reaction for 4 hours, then taking out, dialyzing and dehydrating to obtain the graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite hydrogel;

4) and (3) transferring the graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite hydrogel prepared in the step 3) into a 5 wt% phytic acid solution, soaking for 10 days to dope polyaniline for the second time, using the phytic acid as a co-crosslinking agent of the chitosan, the polyaniline and the polyacrylamide to crosslink the three, and finally dialyzing by using deionized water until the pH value is approximately equal to 7 to obtain the graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite conductive hydrogel material.

5) The tensile strength, elongation at break and electrical conductivity of the hydrogel were 1.31MPa, 343% and 0.010S/m, respectively. Compared with example 1, the extension of the secondary doping time enables the phytic acid molecules to be more completely diffused in the graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite hydrogel, and the doping and crosslinking are more uniform.

Example 5:

1) weighing the following components in percentage by mass: adding water into 5% aniline monomer and 8% phytic acid to prepare a solution, uniformly stirring, and adding 0.5% ammonium persulfate initiator to initiate aniline polymerization; after 4 hours, the reaction is finished, and the polyaniline is dialyzed by deionized water until the pH value is approximately equal to 7, filtered and dried; finally, dissolving polyaniline (the concentration of polyaniline is 0.01%) by using N-methylpyrrolidone for standby;

2) weighing the following components in percentage by mass: 2% of chitosan, 8% of lithium hydroxide monohydrate, 6% of urea, 0.15% of graphene oxide and the balance of water; the molecular weight of the chitosan is 2000000; mixing and swelling the components, and then freezing and unfreezing for multiple times to prepare a graphene oxide/alkali-soluble chitosan solution;

3) taking 20ml of the graphene oxide/alkali-soluble chitosan solution prepared in the step 2), sequentially adding 5ml of 0.01wt% of polyaniline/N-methylpyrrolidone solution, 10g of acrylamide, 0.30g N, N' -methylenebisacrylamide and 0.50g of ammonium persulfate, ultrasonically dispersing, uniformly stirring, centrifugally defoaming, casting into a mold, transferring into an oven at 80 ℃ for reaction for 4 hours, taking out, dialyzing, and dehydrating to obtain the graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite hydrogel;

4) and (3) transferring the graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite hydrogel prepared in the step 3) into a 2 wt% phytic acid solution, soaking for 4 hours to dope polyaniline for the second time, using the phytic acid as a co-crosslinking agent of the chitosan, the polyaniline and the polyacrylamide to crosslink the three, and finally dialyzing by using deionized water until the pH value is approximately equal to 7 to obtain the graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite conductive hydrogel material.

5) The tensile strength, elongation at break and conductivity of the hydrogel were 1.03MPa, 601% and 0.002S/m, respectively.

Example 6:

1) weighing the following components in percentage by mass: adding water into 10% aniline monomer and 20% phytic acid to prepare a solution, stirring and mixing uniformly, and then adding 0.4% ammonium persulfate initiator to initiate aniline polymerization; after 4 hours, the reaction is finished, and the polyaniline is dialyzed by deionized water until the pH value is approximately equal to 7, filtered and dried; finally, dissolving polyaniline (the concentration of polyaniline is 0.15%) by using N-methylpyrrolidone for standby;

2) weighing the following components in percentage by mass: 2% of chitosan, 8% of lithium hydroxide monohydrate, 6% of urea, 0.15% of graphene oxide and the balance of water; the molecular weight of the chitosan is 2000000; mixing and swelling the components, and then freezing and unfreezing for multiple times to prepare a graphene oxide/alkali-soluble chitosan solution;

3) taking 20ml of the graphene oxide/alkali-soluble chitosan solution prepared in the step 2), sequentially adding 5ml of 0.15wt% polyaniline/N-methylpyrrolidone solution, 3g of acrylamide, 0.06g N, N' -methylenebisacrylamide and 0.08g of ammonium persulfate, ultrasonically dispersing, uniformly stirring, centrifugally defoaming, casting in a mold, transferring into a 70 ℃ oven for reaction for 4 hours, taking out, dialyzing, and dehydrating to obtain the graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite hydrogel;

4) and (3) transferring the graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite hydrogel prepared in the step 3) into a 4 wt% phytic acid solution, soaking for 2, carrying out secondary doping on polyaniline, using the phytic acid as a co-crosslinking agent of the chitosan, the polyaniline and the polyacrylamide, crosslinking the graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite hydrogel, and finally dialyzing by using deionized water until the pH value is approximately equal to 7 to obtain the graphene oxide/alkali-soluble chitosan-polyaniline-polyacrylamide composite conductive hydrogel material.

5) The tensile strength, elongation at break and electrical conductivity of the hydrogel were 1.33MPa, 367% and 0.006S/m, respectively.