Method for preparing natural high-molecular material by utilization of rare earth metal ion coordination

A rare earth metal ion, natural polymer technology, applied in medical science, prosthesis, etc., can solve the problems of limiting the potential application of natural polymer materials, and achieve the effect of simple method and enhanced mechanical strength

Inactive Publication Date: 2016-12-21
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional natural polymer materials prepared by transition metal ion coordination cannot meet the requirements of these special functions, which limits the potential application of natural polymer materials in the fields of life, environment and medical science functional materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] a) Synthesis of graphene oxide: Accurately weigh 2.0g natural graphite and 1.6g sodium nitrate at room temperature and join in a 250ml dry three-necked flask, measure 150ml of 98% concentrated sulfuric acid, slowly add it to the reaction flask, and place on ice Under the condition of a water bath, the rotation speed of the stirrer was adjusted, and after stirring for 30 minutes at a rotation speed of 120 rad / min, 9.0 g of potassium permanganate was slowly added to the reaction system. Keep the reaction system at relatively low temperature (0-10° C.) for 48 hours.

[0028] After the above reaction was completed, slowly add 700ml, 5% sulfuric acid solution to the reaction system using a constant pressure dropping funnel, and after magnetically stirring for 2.0 hours at 98°C, the temperature of the system was reduced to 60°C. Add 30ml of 30% hydrogen peroxide to the solution, then stir at room temperature for 2.0h and then centrifuge. The centrifuged product is washed to n...

Embodiment 2

[0040] The basic process is the same as in Example 1, the difference is that:

[0041] In step c), 0.1 g of carboxy-functionalized graphene oxide solid was weighed and added to 100 ml of deionized water and sonicated for 1.5 h to obtain a carboxy-functionalized graphene oxide solution with a mass concentration of 1.0 mg / ml.

[0042] The preparation of the sodium alginate solution in step d) was carried out at 50° C. and stirred for 2.0 h.

[0043] Step 1) Take 5ml of carboxy-functionalized graphene oxide (1.0mg / ml) and add it to 10ml of sodium alginate solution (0.05g / ml) to prepare a mixed solution.

[0044] The rest are completely consistent with Example 1.

Embodiment 3

[0046] The basic process is the same as in Example 1, the difference is that:

[0047] In step c), 0.05 g of carboxy-functionalized graphene oxide solid was weighed and added to 100 ml of deionized water and sonicated for 1.0 h to obtain a carboxy-functionalized graphene oxide solution with a mass concentration of 0.5 mg / ml.

[0048] The preparation of the sodium alginate solution in step d) was carried out at 50° C. and stirred for 2.0 h.

[0049] Step 1) Take 5ml of carboxy-functionalized graphene oxide (0.5mg / ml) and add it to 10ml of sodium alginate solution (0.05g / ml) to prepare a mixed solution.

[0050] The rest are completely consistent with Example 1.

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PUM

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Abstract

The invention discloses a method for preparing a natural high-molecular material by the utilization of rare earth metal ion coordination. Through strong coordination between rare earth metal ion and oxygen atom in carboxyl function group, the rare earth metal ion coordinated natural high-molecular material is prepared by an ion permeation and diffusion method. According to the method, carboxyl-modified graphene oxide is introduced into the natural high-molecular material such that mechanical strength of the material is enhanced and structural regularity of the material also can be boosted. By selecting one ingredient from sodium alginate and xanthan gum as the base material, the material can be endowed with good biocompatibility and biodegradability. The method of the invention is simple and feasible. Reaction condition is mild. The prepared natural high-molecular material has good biocompatibility and strong mechanical properties.

Description

technical field [0001] The invention belongs to the field of synthesis methods of polymer materials, and relates to a method for preparing high-strength natural polymer materials through coordination of rare earth metal ions. Background technique [0002] Rare earth elements have optical, electrical and magnetic properties that many other metal elements do not have due to their special structure (with an unfilled 4f electron layer structure that can produce a variety of electronic energy levels), so they cooperate with transition metals Compared with the rare earth metal complexes, the central ions of the rare earth metal complexes have higher coordination numbers and different coordination configurations, and the rare earth metal complexes often have relatively good properties. Rare earth metal ions can be combined with multifunctional ligands to have potential applications in many fields such as catalysis, magnetism, optics, ion exchange, electron gas adsorption, storage, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/04C08B37/00C08K9/04C08K7/00C08K3/04C08J3/24C08L5/04C08L5/00A61L27/20A61L27/02A61L27/50
CPCC08B37/0084A61L27/025A61L27/20A61L27/50C08B37/0033C08J3/24C08J2305/00C08J2305/04C08K3/04C08K7/00C08K9/04C08L5/04C08L5/00
Inventor 付国东黄倩倩姚芳
Owner SOUTHEAST UNIV
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