CNF-MXene-PEI high-strength and high-conductivity material as well as preparation method and application thereof

Abstract

The invention provides a CNF-MXene-PEI high-strength and high-conductivity material as well as a preparation method and application thereof, and belongs to the technical field of functional materials. The CNF-MXene-PEI high-strength and high-conductivity material comprises cellulose nanofibers, MXene nanosheets and polyethyleneimine, the mass ratio of the cellulose nanofibers to the MXene nanosheets is 2: 3, and the addition amount of the polyethyleneimine is 1-5% of the mass of the cellulose nanofibers. The CNF-MXene-PEI high-strength and high-conductivity material prepared by the preparation method disclosed by the invention has excellent mechanical properties and conductivity, and can be applied to sensors, electric heating devices and energy storage devices.

Description

technical field

[0001] The invention belongs to the field of functional materials, in particular to the manufacture of products or shaped materials containing polymer substances, and in particular to a CNF-MXene-PEI high-strength and high-conductivity material and its preparation method and application. Background technique

[0002] MXene, as a novel two-dimensional transitional metal carbide, nitride, or carbonitride, possesses large specific surface area, 2D layered structure, rich surface chemical properties, excellent electrical conductivity, and responsiveness to various external stimuli. ability, so it is an ideal filler for constructing advanced functional materials. The polar functional groups (Tx) on the surface of MXene, such as -F, =O, and -OH, enable the assembly of various macroscopic structures through hydrogen bonds without changing their intrinsic properties. However, severe heavy stacking of MXene nanosheets and weak interactions between adjacent nanosheets...

Examples

Embodiment 1

[0048] This embodiment provides a CNF-MXene-PEI high-strength and high-conductivity material, comprising cellulose nanofibers (CNF), MXene nanosheets and polyethyleneimine (PEI), the cellulose nanofibers (CNF) and the The mass ratio of the MXene nanosheets is 2:3, and the addition of the polyethyleneimine (PEI) is 3% of the cellulose nanofiber (CNF) mass.

[0049] The preparation method of described CNF-MXene-PEI high-strength high-strength high-conductivity material is as follows:

[0050] S1, preparation of cellulose nanofiber dispersion; specifically include the following steps:

[0051] X1, the preparation of palm fiber: the palm trunk veneer is broken into 90 mesh fibers to obtain palm fiber;

[0052] X2. Palm fiber pretreatment: hydrothermally treat the palm fiber described in step X1 at 70±1°C for 3.5h, then centrifuge at 3500rpm for 5min, and dry the precipitate at 60°C;

[0053] X3, palm fiber delignification: collect 10g of palm fiber treated in step X2, use 300g 5...

Embodiment 2

[0065] This embodiment provides a CNF-MXene-PEI high-strength and high-conductivity material, comprising cellulose nanofibers (CNF), MXene nanosheets and polyethyleneimine (PEI), the cellulose nanofibers (CNF) and the The mass ratio of the MXene nanosheets is 2:3, and the addition of the polyethyleneimine (PEI) is 5% of the cellulose nanofiber (CNF) mass.

[0066] The preparation method of the CNF-MXene-PEI high-strength and high-conductivity material is as follows:

[0067] S1, preparation of cellulose nanofiber dispersion; specifically include the following steps:

[0068] X1, the preparation of palm fiber: the palm trunk veneer is broken into 80 mesh fibers to obtain palm fiber;

[0069] X2. Palm fiber pretreatment: hydrothermally treat the palm fiber described in step X1 at 80±1°C for 3 hours, then centrifuge at 3500rpm for 5min, and dry the precipitate at 60°C;

[0070] X3, palm fiber delignification: collect 10g of palm fiber treated in step X2, use 300g 5wt% sodium ch...

Embodiment 3

[0081] This embodiment provides a CNF-MXene-PEI high-strength high-strength high-conductivity material, comprising cellulose nanofibers (CNF), MXene nanosheets and polyethyleneimine (PEI), the cellulose nanofibers (CNF) The mass ratio of the MXene nanosheets is 2:3, and the addition amount of the polyethyleneimine (PEI) is 1% of the mass of the cellulose nanofibers (CNF).

[0082] The preparation method of described CNF-MXene-PEI high-strength high-strength high-conductivity material is as follows:

[0083] S1, preparation of cellulose nanofiber dispersion; specifically include the following steps:

[0084] X1, the preparation of palm fiber: the palm trunk veneer is broken into 100 mesh fibers to obtain palm fiber;

[0085] X2. Palm fiber pretreatment: hydrothermally treat the palm fiber described in step X1 at 60±1°C for 4h, then centrifuge at 3500rpm for 5min, and dry the precipitate at 60°C;

[0086] X3, palm fiber delignification: collect 10g of palm fiber treated in ste...

technical field

[0001] The invention belongs to the field of functional materials, in particular to the manufacture of products or shaped materials containing polymer substances, and in particular to a CNF-MXene-PEI high-strength and high-conductivity material and its preparation method and application. Background technique

[0002] MXene, as a novel two-dimensional transitional metal carbide, nitride, or carbonitride, possesses large specific surface area, 2D layered structure, rich surface chemical properties, excellent electrical conductivity, and responsiveness to various external stimuli. ability, so it is an ideal filler for constructing advanced functional materials. The polar functional groups (Tx) on the surface of MXene, such as -F, =O, and -OH, enable the assembly of various macroscopic structures through hydrogen bonds without changing their intrinsic properties. However, severe heavy stacking of MXene nanosheets and weak interactions between adjacent nanosheets...

Examples

Embodiment 1

[0048] This embodiment provides a CNF-MXene-PEI high-strength and high-conductivity material, comprising cellulose nanofibers (CNF), MXene nanosheets and polyethyleneimine (PEI), the cellulose nanofibers (CNF) and the The mass ratio of the MXene nanosheets is 2:3, and the addition of the polyethyleneimine (PEI) is 3% of the cellulose nanofiber (CNF) mass.

[0049] The preparation method of described CNF-MXene-PEI high-strength high-strength high-conductivity material is as follows:

[0050] S1, preparation of cellulose nanofiber dispersion; specifically include the following steps:

[0051] X1, the preparation of palm fiber: the palm trunk veneer is broken into 90 mesh fibers to obtain palm fiber;

[0052] X2. Palm fiber pretreatment: hydrothermally treat the palm fiber described in step X1 at 70±1°C for 3.5h, then centrifuge at 3500rpm for 5min, and dry the precipitate at 60°C;

[0053] X3, palm fiber delignification: collect 10g of palm fiber treated in step X2, use 300g 5...

Embodiment 2

[0065] This embodiment provides a CNF-MXene-PEI high-strength and high-conductivity material, comprising cellulose nanofibers (CNF), MXene nanosheets and polyethyleneimine (PEI), the cellulose nanofibers (CNF) and the The mass ratio of the MXene nanosheets is 2:3, and the addition of the polyethyleneimine (PEI) is 5% of the cellulose nanofiber (CNF) mass.

[0066] The preparation method of the CNF-MXene-PEI high-strength and high-conductivity material is as follows:

[0067] S1, preparation of cellulose nanofiber dispersion; specifically include the following steps:

[0068] X1, the preparation of palm fiber: the palm trunk veneer is broken into 80 mesh fibers to obtain palm fiber;

[0069] X2. Palm fiber pretreatment: hydrothermally treat the palm fiber described in step X1 at 80±1°C for 3 hours, then centrifuge at 3500rpm for 5min, and dry the precipitate at 60°C;

[0070] X3, palm fiber delignification: collect 10g of palm fiber treated in step X2, use 300g 5wt% sodium ch...

Embodiment 3

[0081] This embodiment provides a CNF-MXene-PEI high-strength high-strength high-conductivity material, comprising cellulose nanofibers (CNF), MXene nanosheets and polyethyleneimine (PEI), the cellulose nanofibers (CNF) The mass ratio of the MXene nanosheets is 2:3, and the addition amount of the polyethyleneimine (PEI) is 1% of the mass of the cellulose nanofibers (CNF).

[0082] The preparation method of described CNF-MXene-PEI high-strength high-strength high-conductivity material is as follows:

[0083] S1, preparation of cellulose nanofiber dispersion; specifically include the following steps:

[0084] X1, the preparation of palm fiber: the palm trunk veneer is broken into 100 mesh fibers to obtain palm fiber;

[0085] X2. Palm fiber pretreatment: hydrothermally treat the palm fiber described in step X1 at 60±1°C for 4h, then centrifuge at 3500rpm for 5min, and dry the precipitate at 60°C;

[0086] X3, palm fiber delignification: collect 10g of palm fiber treated in ste...

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