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Interface supramolecular reinforced nano composite material and preparation method thereof

A nanocomposite material and supramolecular technology, applied in the field of interfacial supramolecule reinforced nanocomposite materials and its preparation, can solve the problems of lack of interface design, material processability and mechanical properties decline, hindering the practical application of materials, etc., to achieve the benefit of large Effects of large-scale application, reduction of preparation cost, and simple preparation method

Inactive Publication Date: 2021-02-19
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the lack of effective interface design, conventional polymer-based composites are filled with a large number of nanoparticles, which reduces the processability and mechanical properties of the material, hindering the practical application of the material.

Method used

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  • Interface supramolecular reinforced nano composite material and preparation method thereof
  • Interface supramolecular reinforced nano composite material and preparation method thereof
  • Interface supramolecular reinforced nano composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] TA-WS 2 Preparation of nanosheet dispersion: 240 mg of tungsten disulfide (WS 2 ) powder, 120 mg of tannic acid (TA) were added to 120 mL of deionized water, and then ultrasonicated for 2 h with an ultrasonic pulverizer at 300 W. Finally, centrifuge at 6000rpm for 15 minutes and take the supernatant to remove unstripped WS 2 , collecting WS stable in TA solution 2 nanosheets, prepared TA-WS 2 nanosheet dispersion.

[0030] TA-WS 2 / PU composite preparation: First, TA-WS 2 Nanosheet dispersion (72g, 0.1wt%) was added to polyurethane latex (1g, 60wt%), and stirred for 30 minutes. Next, the mixed TA-WS 2 / PU latex is vacuum filtered through a polypropylene filter membrane with a pore size of 0.22 μm to obtain TA-WS 2 / PU film, TA-WS 2 / PU membrane attached to the filter membrane. The formed film was dried in air at room temperature for 4 hours, and then peeled off from the polypropylene filter membrane to obtain WS 2 / PU composite material.

[0031] The transmi...

Embodiment 2

[0033] Preparation of polydopamine@halloysite nano-hybrid dispersion: mix dopamine (1.0g) in 100ml, 0.5w% halloysite suspension dispersion, add appropriate amount of NH 3 ·H 2 O (28%). Thereafter, the solution was reacted for 2 hours under vigorous stirring. Rinse several times with deionized water to obtain polydopamine@haloysite nanohybrid dispersion.

[0034] Preparation of photothermal nanocomposites: Add epoxidized natural rubber (1.7g, 35wt%) and polydopamine @ halloysite suspension (12g, solid content: 0.5wt%) under strong stirring conditions, ultrasonic 5min, preparation Supramolecular reinforced nanocomposite latex was obtained. The obtained composite latex was dropped into a polytetrafluoroethylene mold, and baked in an oven at 65°C for 4 hours to obtain a nanocomposite material reinforced by multiple hydrogen bonds at the interface.

Embodiment 3

[0036] Fe 3+ -Preparation of GO nanosheet dispersion: graphene (GO) nanosheets were prepared according to the modified Hummer method. Graphite powder (3.0g, 1wt%), FeCl 3 (2g) and KMnO 4 (18.0g, 6wt%) mixed and slowly added concentrated H2 SO 4 / H 3 PO 4 (360:40 v / v) mixture. The obtained blend was then heated to 50 °C and stirred for 12 h. Afterwards, the blend was cooled to room temperature and kept at 30% H 2 o 2 (3 mL) in an ice bath. The resulting product was purified by repeated centrifugation and dialysis in deionized water.

[0037] Preparation of GA-ENR emulsion: 2.5 g of gelatin (GA) was dissolved in 97.5 mL of deionized water to obtain a GA solution (1 wt%). In addition, 21.2 g of epoxidized natural rubber (ENR) latex was added to 12.8 g of GA solution and vigorously stirred at room temperature for 10 min to prepare GA-ENR emulsion.

[0038] Preparation of nanocomposites: 84.21 g of Fe intercalated 3+ The GO dispersion was mixed with GA-ENR latex, stirre...

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Abstract

The invention discloses an interface supramolecular reinforced nano composite material and a preparation method thereof. The preparation method comprises the following steps: (1) preparing a nano-filler dispersion liquid, and stably dispersing a nano-filler; (2) adding polyphenol and analogues thereof to modify the surface of the nano-filler; (3) carrying out ultrasonic dispersion mixing on the surface-modified nano-filler dispersion liquid obtained in the step (2) and latex emulsion according to a weight ratio, or subjecting the modified filler and latex to double-roller / banburying extrusionmelting processing dispersion; and (4) injecting the mixed latex obtained in the step (3) into a mold, and conducting drying and molding in a 60 DEG C blast oven. The preparation method is simple, andthe obtained material has a unique three-dimensional nano-filler network structure, so that the rigid filler and the flexible polymer matrix have good interface bonding and an interface phase with acertain thickness, crack propagation can be stopped when the material is damaged, a large amount of impact energy is consumed, and borne external force is transmitted, so that the purposes of strengthening and toughening are achieved.

Description

technical field [0001] The invention belongs to the technical field of polymer-based composite materials, and in particular relates to an interfacial supramolecular reinforced nanocomposite material and a preparation method thereof. Background technique [0002] Rubber-like elastomeric polymer materials usually require filler compounding to endow them with functionality and high mechanical properties, expanding the scope of their practical application fields. In the field of nanofiller-reinforced elastomer composites, the chemical inertness of the filler surface leads to poor bonding at the filler-polymer interface in filler / elastomer composites, which is easily destroyed. When the filler is damaged, it is easy to slip off from the interface and cannot fully exert its reinforcing effect. In addition, the dispersion of nanoparticles in nanofiller / polymer composites and the compatibility with polymer matrix are difficult to control, which limits the use of nanofiller / polymer ...

Claims

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Application Information

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IPC IPC(8): C08L75/04C08K9/04C08K7/00C08K3/30C08K5/1545C08J5/18C08L15/00C08L79/04C08L89/00C08K3/34C08K3/04C08K9/02
CPCC08J5/18C08J2375/04C08K5/1545C08K7/00C08K9/04C08K2003/3009C08K2201/011C08L15/00C08L79/04C08K3/346C08L89/00C08K9/02C08K3/042
Inventor 张新星王宇嫣黄鑫
Owner SICHUAN UNIV
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