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Method for chemical design of photothermal effect type self-healing hydrogel based on melanin

A photothermal effect and melanin technology, applied in the field of functional polymers, can solve problems such as waste of resources, environmental pollution, and large fuel consumption

Pending Publication Date: 2019-12-31
LUDONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional methods such as membrane reverse osmosis, ion exchange, dialysis, etc. will consume a lot of fuel, not only waste resources, but also cause environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Example 1: Preparation of polydopamine-type nanoparticles grafted with functional polymers on the surface

[0046] Gently stir 2 mL of aqueous ammonia with 40 mL of ethanol and 90 mL of ultrapure water at 30 °C for 30 min,

[0047] 0.5 g of dopamine hydrochloride dissolved in 10 ml of ultrapure water was added to the above mixture. React at 30°C for 24 hours, repeat centrifugation for 10 minutes, and rinse with ultrapure water. The post-treatment was repeated centrifugation at 10,000 rpm for 30 minutes, rinsed with ultrapure water, and dried the polydopamine nanoparticles under vacuum to obtain black polydopamine nanoparticles with distinct particles and a diameter of 100 nanometers.

Embodiment 2

[0048] Example 2: PDA Surface Grafting Atom Transfer Radical Polymerization Initiator (PDA@Br)

[0049] Put 1.0 g of PDA and 30.0 ml of DMF into the flask and sonicate for 1 h. Then, 20.0 mL of TEA and 30.0 mL of BiBB were added to the flask, which was immersed in an ice bath. The resulting solution was stirred for 24 hours. Finally, the product was repeatedly washed with dichloromethane and deionized water, and finally freeze-dried to obtain PDA@Br.

Embodiment 3

[0050] Example 3: PDA@Br surface grafted polydimethylaminoethyl methacrylate (PDMAEMA)

[0051] The components were sequentially added to the flask, DMAEMA100.0 mg, PDA@Br (100.0 mg), EBiB (78.0 μl), using CuBr 2 (50.0 mg) as catalyst, PMDETA (200.0 μl), VC (100.0 mg), DMF (60.0 ml) were used respectively. Then, the mixture was subjected to three freeze-pump-thaw cycles. Finally, the polymerization system was terminated after reacting at 70° C. for 24 hours. The post-treatment was to redisperse the precipitate in ethanol and further centrifuge after discarding the top solvent, repeat the purification cycle three times, and dry under vacuum at 35 degrees Celsius for 24 hours, thereby preparing polydopamine-type nanocomposites (PDA @PDMAEMA).

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PUM

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Abstract

The invention discloses a method for chemical design and preparation of nano-composite hydrogel with strong photothermal effect and self-repairing capability by melanin. Specifically, polydopamine type nanoparticles are prepared, also surface initiated atom transfer free radical polymerization technology is utilized, firstly an atom transfer free radical polymerization initiator (PDA@Br) is grafted on the surfaces of polydopamine type nanoparticles, then polydimethylaminoethyl methacrylate (PDMAEMA) is grafted on the surface of the polydopamine type nanoparticles, thereby achieving functionalmodification on the surfaces of the polydopamine type nanoparticles. The prepared polydopamine type nano-composite material (PDA@PDMAEMA) is implanted into a hydrogel to obtain the nano-composite hydrogel with strong photothermal effect and self-repairing performance.

Description

technical field [0001] The present invention prepares polydopamine-type nanoparticles based on melanin chemistry, uses surface-induced atom transfer radical polymerization technology to functionalize its surface, and implants it into hydrogel to construct nano-particles with strong photothermal effect and self-repairing ability. The composite hydrogel belongs to the field of functional polymers. Background technique [0002] Water is one of the most abundant resources on earth, yet there is very little fresh water available for drinking. Fresh water resources are so precious, but they have to meet the needs of most living things on the earth. In addition, there are still serious pollution and waste. Various factors led to a shortage of fresh water resources. At this time, the desalination of the only inexhaustible seawater resource has attracted widespread attention. In this regard, there are many methods for seawater desalination. However, traditional methods such as me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F285/00C08F220/06C08F283/00C08F220/34B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C08F283/002C08F285/00C08F2438/01C08F220/06C08F220/34
Inventor 柏良久任娟娟王文香马安瑶王娜陈厚杨丽霞蒙延锋
Owner LUDONG UNIVERSITY
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