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A kind of amphiphilic polymer biosurfactant and its preparation method and application

An amphiphilic polymer, surfactant technology, applied in chemical instruments and methods, chemical/physical processes, transportation and packaging, etc. problem, to achieve the effect of improving the emulsion conversion rate, low surface tension, and cost-effective

Active Publication Date: 2021-10-29
山东德坤工贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in traditional emulsion polymerization, the presence of small molecule surfactants will affect the performance of the polymer
Compared with traditional surfactants, polymer surfactants have excellent dispersibility, O / W emulsion stability, salt resistance and anti-sedimentation due to the association of their hydrophobic side chains in water to form hydrophobic groups. The ability of polymer surfactants to reduce surface tension is generally low, and the surface activity is not significant

Method used

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  • A kind of amphiphilic polymer biosurfactant and its preparation method and application
  • A kind of amphiphilic polymer biosurfactant and its preparation method and application
  • A kind of amphiphilic polymer biosurfactant and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add 5g of HEC to the reaction bottle, add 90% ethanol / water solution, configure it as a 20%wt solution, add sodium hydroxide to adjust the pH to alkaline, put it in a constant temperature water bath at 45°C, and then slowly add the ethanol solution containing 1g of maleic anhydride dropwise After the dropwise addition, continue to react for 2 hours, adjust the pH to neutral with hydrochloric acid solution, then centrifuge twice at high speed with absolute ethanol, and dry in vacuum; add the dried product into the reaction flask, add sodium bisulfite sodium solution, and drop Add catalyst cetyltrimethylammonium bromide, react at 80°C for 2 hours, remove solvent by rotary evaporation, and dry to obtain maleic anhydride modified cellulose surfactant.

Embodiment 2

[0026] Add 0.8g of polyethylene glycol (mPEG) and 2.64g of fluorocaprolactone into the reaction flask, add stannous octoate, vacuumize, and react in a constant temperature oil bath at 140°C for 24h; after cooling, add dichloromethane to dissolve, Then the solution was dropped into cold anhydrous ether, precipitated, filtered, and vacuum-dried to obtain polyethylene glycol-caprolactone copolymer (PEG-PCL).

[0027] Dissolve polyethylene glycol-caprolactone copolymer in DMF, add DCC, nitrogen protection, and add maleic anhydride modified cellulose surfactant of equal mass therein, stir at low speed, then add dropwise the solution that has dissolved in DMPA. DMF solution, stirred and reacted at room temperature for 48 hours, extracted with ethyl acetate, the extract was crystallized in ice water, the crystals were rinsed with ice ethanol, filtered with suction, and dried in vacuum to obtain a cellulose-based amphiphilic polymer surfactant.

[0028] The modified cellulose surfacta...

Embodiment 3

[0031] Example 3: PVAc emulsion was prepared according to the above preparation method as a blank sample.

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Abstract

This case involves an amphiphilic polymer biosurfactant and its preparation method and application. The amphiphilic polymer is prepared by ring opening of polyethylene glycol and fluorocaprolactone, which is grafted to the surface of water-soluble cellulose to form Cellulose-based amphiphilic polymer surfactant, and acts on polyvinyl acetate emulsion. In this case, the cellulose is derived from wood or kapok, the raw material is easy to obtain, the modification process is simple, and the cost performance is high; the invention prepares a cellulose-based amphiphilic polymer surfactant, which has a lower critical micelle concentration and surface tension; the modified cellulose surfactant participates in the emulsion polymerization of polyvinyl acetate, provides good stability for the emulsion, improves the conversion rate of the emulsion, and improves the adhesion and strength of the emulsion; modified cellulose can be used as A new biosurfactant that meets the requirements of green chemistry.

Description

technical field [0001] The invention relates to the field of emulsion surfactants, in particular, the invention relates to an amphiphilic polymer biosurfactant and its preparation method and application. Background technique [0002] Traditional emulsions with large oil / water interfaces are thermodynamically extremely unstable systems, adding surfactants can effectively reduce the surface tension and promote the long-term stability of the emulsion. However, in traditional emulsion polymerization, the presence of small molecule surfactants will affect the performance of polymers. Compared with traditional surfactants, polymer surfactants have excellent dispersibility, O / W emulsion stability, salt resistance and anti-sedimentation due to the association of their hydrophobic side chains in water to form hydrophobic groups. The ability of polymeric surfactants to reduce surface tension is generally low, and the surface activity is not significant. [0003] Polyvinyl acetate (P...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G81/00C08B3/12B01F17/52C09K23/52
CPCC08G81/00C08B3/12C09K23/00
Inventor 李瑞
Owner 山东德坤工贸有限公司