Multi-response shape memory polyurethane material as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of functional materials, and particularly relates to a multi-response shape memory polyurethane material which comprises the components in percentage by mass: 6.0-10.0% of thermoplastic polyurethane, 0.5-1.0% of acrylic crosslinking resin, 0.1-1.0% of a nano reinforcing material, 0.2-1.0% of a nano conductive material, 0.1-0.6% of an organic antibacterial material, and the balance being a solvent based on 100% of total mass of the multi-response shape memory polyurethane. Through the modification and enhancement effects of the components on the polyurethane material, the polyurethane material not only has an excellent shape memory function and response performance to stimulation of water, pH and electricity, but also has good conductivity and antibacterial performance, so that the stimulation response range of the shape memory polyurethane material is expanded, the shape memory polyurethane material has a multi-response shape memory function, meets the application requirements of a multifunctional flexible sensor, and widens the application range of the shape memory polyurethane material.

Description

technical field

[0001] The invention belongs to the technical field of functional materials, and in particular relates to a multiple-response shape-memory polyurethane material and a preparation method thereof, a flexible sensor and a conductive textile. Background technique

[0002] With the continuous progress and development of society and science and technology, people's requirements for materials are getting higher and higher, and various new functional materials are applied. Shape memory polymer smart materials with self-diagnosis, self-adaptation, shape recovery and other characteristics are convenient. It is one of the important ones and has broad application prospects. Shape memory polymer (SMP) refers to a polymer with an initial shape that can be restored to its original shape by external stimulation after being deformed and fixed under certain external conditions. It has the advantages of light weight, low price, easy processing, large deformation and Corrosion ...

Examples

preparation example Construction

[0047] The embodiment of the present invention also provides a method for preparing a multiple-response shape-memory polyurethane material, comprising the following steps:

[0048] S10. Obtain a nano-conductive material and a solvent, and disperse the nano-conductive material in the solvent to obtain a dispersion liquid of the nano-conductive material;

[0049] S20. Obtain thermoplastic polyurethane, acrylic crosslinked resin, and nano-reinforcement material, and disperse the thermoplastic polyurethane, the acrylic cross-linked resin, and the nano-reinforcement material in the solvent to obtain a mixed solution;

[0050] S30. Add the dispersion of the nano-conductive material to the mixed solution, and stir to obtain a conductive shape-memory polyurethane dispersion;

[0051] S40. Obtain an organic antibacterial material, add the organic antibacterial material to the conductive shape memory polyurethane dispersion, and perform dispersion treatment to obtain a multi-response sh...

Embodiment 1

[0063] A multiple response shape memory polyurethane material, comprising the following preparation steps:

[0064] S11. Add 0.27g of carbon nanotubes (CNTs) to 20mL of N,N-dimethylformamide (DMF), and ultrasonically disperse for 30min to obtain a dispersion of CNTs;

[0065] S21. Take 4.0g of TPU, 0.5g of Carbomer-940 and 0.225g of hydroxyethyl nanocellulose (CNC), add it to 25mL of DMF, and stir magnetically at a rate of 200r / min at 75°C for 2h , so that TPU and Carbomer-940 are completely dissolved and CNC is uniformly dispersed to obtain a mixture of TPU, Carbomer-940 and CNC;

[0066] S31. Slowly add the dispersion of CNTs to the mixture of TPU, Carbomer-940 and CNC, and continue magnetic stirring at a rate of 200r / min for 3.0h at 75°C, so that the CNTs are in the shape memory polyurethane system Evenly dispersed to obtain conductive shape memory polyurethane dispersion;

[0067] S41. Add 0.2 g of chloramphenicol to the conductive shape-memory polyurethane dispersion, a...

Embodiment 2

[0069] A multiple response shape memory polyurethane material, comprising the following preparation steps:

[0070] S12. Get 0.27g of graphene and join in the N of 20mL, N-dimethylformamide (DMF), ultrasonic dispersion 30min, obtain the dispersion liquid of graphene;

[0071] S22. Take 4.0g of TPU, 0.5g of Carbomer-940 and 0.225g of hydroxyethyl nanocellulose (CNC), add it to 25mL of DMF, and stir magnetically at a rate of 200r / min at 75°C for 2h , so that TPU and Carbomer-940 are completely dissolved and CNC is uniformly dispersed to obtain a mixture of TPU, Carbomer-940 and CNC;

[0072] S32. Slowly add the dispersion of graphene into the mixture of TPU, Carbomer-940 and CNC, and continue to stir magnetically at a rate of 200r / min for 3.0h at 75°C, so that the graphene is in the shape memory polyurethane Disperse uniformly in the system to obtain conductive shape memory polyurethane dispersion;

[0073] S42. Add 0.2 g of chloramphenicol to the conductive shape-memory polyu...

technical field

[0001] The invention belongs to the technical field of functional materials, and in particular relates to a multiple-response shape-memory polyurethane material and a preparation method thereof, a flexible sensor and a conductive textile. Background technique

[0002] With the continuous progress and development of society and science and technology, people's requirements for materials are getting higher and higher, and various new functional materials are applied. Shape memory polymer smart materials with self-diagnosis, self-adaptation, shape recovery and other characteristics are convenient. It is one of the important ones and has broad application prospects. Shape memory polymer (SMP) refers to a polymer with an initial shape that can be restored to its original shape by external stimulation after being deformed and fixed under certain external conditions. It has the advantages of light weight, low price, easy processing, large deformation and Corrosion ...

Examples

preparation example Construction

[0047] The embodiment of the present invention also provides a method for preparing a multiple-response shape-memory polyurethane material, comprising the following steps:

[0048] S10. Obtain a nano-conductive material and a solvent, and disperse the nano-conductive material in the solvent to obtain a dispersion liquid of the nano-conductive material;

[0049] S20. Obtain thermoplastic polyurethane, acrylic crosslinked resin, and nano-reinforcement material, and disperse the thermoplastic polyurethane, the acrylic cross-linked resin, and the nano-reinforcement material in the solvent to obtain a mixed solution;

[0050] S30. Add the dispersion of the nano-conductive material to the mixed solution, and stir to obtain a conductive shape-memory polyurethane dispersion;

[0051] S40. Obtain an organic antibacterial material, add the organic antibacterial material to the conductive shape memory polyurethane dispersion, and perform dispersion treatment to obtain a multi-response sh...

Embodiment 1

[0063] A multiple response shape memory polyurethane material, comprising the following preparation steps:

[0064] S11. Add 0.27g of carbon nanotubes (CNTs) to 20mL of N,N-dimethylformamide (DMF), and ultrasonically disperse for 30min to obtain a dispersion of CNTs;

[0065] S21. Take 4.0g of TPU, 0.5g of Carbomer-940 and 0.225g of hydroxyethyl nanocellulose (CNC), add it to 25mL of DMF, and stir magnetically at a rate of 200r / min at 75°C for 2h , so that TPU and Carbomer-940 are completely dissolved and CNC is uniformly dispersed to obtain a mixture of TPU, Carbomer-940 and CNC;

[0066] S31. Slowly add the dispersion of CNTs to the mixture of TPU, Carbomer-940 and CNC, and continue magnetic stirring at a rate of 200r / min for 3.0h at 75°C, so that the CNTs are in the shape memory polyurethane system Evenly dispersed to obtain conductive shape memory polyurethane dispersion;

[0067] S41. Add 0.2 g of chloramphenicol to the conductive shape-memory polyurethane dispersion, a...

Embodiment 2

[0069] A multiple response shape memory polyurethane material, comprising the following preparation steps:

[0070] S12. Get 0.27g of graphene and join in the N of 20mL, N-dimethylformamide (DMF), ultrasonic dispersion 30min, obtain the dispersion liquid of graphene;

[0071] S22. Take 4.0g of TPU, 0.5g of Carbomer-940 and 0.225g of hydroxyethyl nanocellulose (CNC), add it to 25mL of DMF, and stir magnetically at a rate of 200r / min at 75°C for 2h , so that TPU and Carbomer-940 are completely dissolved and CNC is uniformly dispersed to obtain a mixture of TPU, Carbomer-940 and CNC;

[0072] S32. Slowly add the dispersion of graphene into the mixture of TPU, Carbomer-940 and CNC, and continue to stir magnetically at a rate of 200r / min for 3.0h at 75°C, so that the graphene is in the shape memory polyurethane Disperse uniformly in the system to obtain conductive shape memory polyurethane dispersion;

[0073] S42. Add 0.2 g of chloramphenicol to the conductive shape-memory polyu...

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