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Intelligence branch polymer hydrogel and preparation method thereof

A branching and hydrogel technology, which is applied in the field of intelligent dendritic polymer hydrogel and its preparation, can solve the problems of poor controllability, dendritic polymer hydrogel has not been reported, and achieve high load capacity , the structure is easy to adjust, and the effect of excellent temperature sensitivity

Inactive Publication Date: 2015-12-09
SHANGHAI UNIV
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Problems solved by technology

[0004] Most of the materials currently used to prepare hydrogels are linear polymers with relatively simple structures and poor controllability
Dendritic polymers are a new class of nonlinear polymers developed in the past two decades. These polymers have many excellent characteristics, including nanoscale size, easy to adjust structure, and rich internal holes, which can efficiently load small molecules. etc., but researches based on dendritic polymer hydrogels have not been reported

Method used

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  • Intelligence branch polymer hydrogel and preparation method thereof
  • Intelligence branch polymer hydrogel and preparation method thereof
  • Intelligence branch polymer hydrogel and preparation method thereof

Examples

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Embodiment 1

[0022] The present invention relates to the preparation and synthesis of a first-generation dendritic alkoxyether monomer and terpyridine monomer, and the synthetic route refers to figure 1 .

[0023] 1. Synthesis of Thermosensitive Copolymer

[0024] Add the first-generation dendritic alkoxyether monomer (2.50g) and terpyridine monomer (0.16g), AIBN (7.60mg) and DMF (0.8mL) into a 50mL reaction tube, and vacuum replace the N 2 , place the closed reaction tube at 65 o In the C oil bath, the polymerization reaction is carried out for 3~5h, until the viscosity of the reaction solution increases and the magnet stops stirring. An appropriate amount of DCM was added to fully dissolve, and purified by silica gel column chromatography to obtain a copolymer (2.83 g), with a yield of 93.3%.

[0025] 2. Preparation of Dendritic Polymer Hydrogels

[0026] In a 10mL sample bottle, the polymer (50mg) and deionized water (407.5mg) were prepared into an aqueous solution of a certain conc...

Embodiment 2

[0028] Embodiment two: In this example, a temperature-sensitive polymer solution was prepared for a turbidity test. The solution was heated at 32 o The transmittance near C decreases rapidly, dehydration and aggregation occur, and in the process of cooling at 31.5 o The transmittance near C increases, and rehydration becomes a good dispersion system, see image 3 .

Embodiment 3

[0029] Embodiment three: In the present embodiment, hydrogels (3%wt~10%wt) of different concentrations were prepared, and at 25 o C for rheological tests. The hydrogel with a copolymer concentration of 10%wt has a modulus of about 2000 Pa at this temperature, can maintain a certain shape, and has a certain mechanical strength. Figure 4 .

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Abstract

The present invention relates to an intelligence polymer hydrogel and a preparation method thereof. The hydrogel is prepared by adding Fe <2 +> into a temperature-sensitive copolymer formed by copolymerization of alkoxy ether branch primitives with temperature sensing properties and terpyridine monomers for crosslinking by terpyridine-metal coordination effect, the solid content of the hydrogel is 9wt%; the hydrogel in a certain temperature range can achieve the process of rapid dehydration collapse with increasing of the temperature and re-hydration swelling with decreasing of the temperature, and the hydrogel has high load capacity and good biocompatibility, and has good use value in the field of biomedical materials.

Description

technical field [0001] The invention relates to an intelligent branched polymer hydrogel and a preparation method thereof. Background technique [0002] Smart hydrogels are a class of smart materials that can change their properties or shapes according to changes in the external environment. Various types of smart hydrogels have been developed, including temperature-sensitive, pH-sensitive, light-sensitive, and redox-sensitive. Among them, temperature-sensitive hydrogels have received extensive attention. This type of hydrogel is formed by cross-linking temperature-sensitive polymers through physical effects or chemical bonds, and has a specific sensitive temperature. Below this temperature, the polymer and water molecules are well combined, and the gel absorbs water and swells; when the temperature rises above the sensitive temperature, the hydrogen bond between the polymer chain and the water molecule is destroyed, and the polymer chain is dehydrated, resulting in The se...

Claims

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Application Information

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IPC IPC(8): C08G83/00
Inventor 李文殷瑜陈晓张夏聪黄高军熊初平张阿方
Owner SHANGHAI UNIV
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