Organic-inorganic hybrid nanoparticle based on branched PEI (polyethyleneimine) and POSS (polysilsesquioxane) as well as preparation method of organic-inorganic hybrid nanoparticle

A technology of branched polyethyleneimine and polysilsesquioxane, which is applied in the field of organic-inorganic hybrid nanoparticles, organic-inorganic hybrid nanoparticles and their preparation, and can solve the problem of less research and difficult selection of co-solution polymerization, etc. problem, to achieve the effect of simple method, low cost and mild conditions

Inactive Publication Date: 2017-06-13
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PEI / POSS composite nanoparticles are less studied, mainly because the traditional preparation method is difficult to obtain by co-solution polymerization.

Method used

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  • Organic-inorganic hybrid nanoparticle based on branched PEI (polyethyleneimine) and POSS (polysilsesquioxane) as well as preparation method of organic-inorganic hybrid nanoparticle
  • Organic-inorganic hybrid nanoparticle based on branched PEI (polyethyleneimine) and POSS (polysilsesquioxane) as well as preparation method of organic-inorganic hybrid nanoparticle
  • Organic-inorganic hybrid nanoparticle based on branched PEI (polyethyleneimine) and POSS (polysilsesquioxane) as well as preparation method of organic-inorganic hybrid nanoparticle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Synthesis of Cyclodextrin Branched Polyethyleneimine (PEI-CD):

[0044]Add 3.0g (0.3mmol) branched polyethyleneimine (PEI, Mw=10000, molecular weight distribution coefficient is 2.55, total amine value is 18mg eq / g.solid), 6g (4.65 mmol) TsCD and 100 mL of ultra-dry dimethyl sulfoxide were reacted at 75° C. for 72 h under magnetic stirring and nitrogen protection. After the reaction, the product was precipitated with dichloromethane, the solid obtained by suction filtration was re-dissolved, and then precipitated with dichloromethane, and purified three times in this way, dried, dissolved in water, and finally transferred to a dialysis bag (molecular weight cut-off: 3500) for dialysis for three times. Day, freeze-dried to obtain a yellowish solid, that is, PEI-CD, and its CD grafting rate was 5.1%.

Embodiment 2

[0046] Synthesis of hexahedral silsesquioxane containing adamantane unit (Ad-POSS):

[0047] Weigh 2.6g (2.9mmol) of heptaisobutyl-aminopropyl POSS into a three-necked round-bottomed flask with magnetic stirring, then add 0.5g (2.48mmol) of triethylamine and 100mL of dry tetrahydrofuran respectively, and install nitrogen The inlet and outlet and the constant pressure dropping funnel are used to cool the reaction system to about 0°C with an ice-salt bath under stirring conditions. Under the protection of nitrogen, turn the constant pressure dropping funnel plunger to add the mixed solution of 0.65g (3.3mmol) 1-adamantanyl chloride and 10mL tetrahydrofuran drop by drop, and the addition is completed in about 5 minutes. Afterwards, the ice-salt bath was removed to return the system to room temperature, and the reaction was continued for 24 h. Then rotary evaporation concentrated, the concentrated solution was dropped into cold water to precipitate the product, repeated three tim...

Embodiment 3

[0049] Preparation of PEI / POSS hybrid nanoparticles by assembly at water / toluene two-phase interface:

[0050] Weigh 70mg (0.005mmol) PEI-CD (the synthesis method refers to Example 1, the Mw=14000 of the prepared PEI-CD, the molecular weight distribution coefficient is 2.17, the CD grafting rate is 1.2%, and the total amine value is 18mg eq / g .solid) dissolved in 5mLH 2 In O, 5.18mg (0.005mmol) Ad-POSS was dissolved in 5mL toluene, and the two solutions were mixed in a 10mL sample bottle, mixed and ultrasonicated for 5 minutes in an ultrasonic cleaner (power was 240W), and constantly oscillated during the ultrasonic process, resulting in White emulsion, after standing for 24h. After that, most of the toluene solution in the upper layer was removed, and the aqueous solution in the lower layer was taken out with a syringe, and filtered to obtain a light blue assembly, which is the organic-inorganic hybrid nanoparticle.

[0051] The prepared organic-inorganic hybrid nanoparticl...

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Abstract

The invention discloses an organic-inorganic hybrid nanoparticle based on branched PEI (polyethyleneimine) and POSS (polysilsesquioxane) as well as a preparation method of the organic-inorganic hybrid nanoparticle. The organic-inorganic nanoparticle is obtained by assembling subject unit grafted hydrophilic branched PEI and object unit modified POSS through molecular recognition between subject and object units and by use of an oil/water phase interface. The preparation of the organic-inorganic hybrid nanoparticle is simple and low in cost, the condition is mild, the problem that conventional preparation methods lack cosolvents is solved, the prepared organic-inorganic hybrid nanoparticle has the characteristics of being easy to functionalize and sensitive to pH, and the particle size can be regulated through pH easily.

Description

technical field [0001] The invention relates to an organic-inorganic hybrid nanoparticle, in particular to an organic-inorganic hybrid nanoparticle based on branched polyethyleneimine and hexahedral oligomeric silsesquioxane and a preparation method thereof, belonging to the field of polymer materials. Background technique [0002] Polyethyleneimine (PEI) is mainly divided into branched polyethyleneimine and linear polyethyleneimine, wherein the branched polyethyleneimine component contains three kinds of amino groups: primary amine, secondary amine and tertiary amine. It is the material with the highest cation, high reactivity, water solubility three significant features. The main use of polyethyleneimine is determined by its special structure. The surface has a cationic property. It can be used as an anion neutralizer in the papermaking field to improve the fixation efficiency and retention rate; in the adhesive field, it can enhance the bonding strength of the adhesive. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/00C08L87/00C08L83/08C08G81/00C08G77/38C08G77/398C08G77/388
CPCC08G77/38C08G77/388C08G77/398C08G81/00C08J3/00C08J2387/00C08J2483/08C08L83/08C08L87/00
Inventor 孙晓毅王从强裴凡凡李娟王平山
Owner CENT SOUTH UNIV
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