Preparation method of polyurethane pervaporation phenol/water separating membrane compounded by inorganic particles

An inorganic particle, pervaporation technology, applied in semi-permeable membrane separation, chemical instruments and methods, membrane technology, etc., can solve the problems of selectivity gap, low permeability, etc., achieve strong hydrophobic performance, high specific modulus, high The effect of specific strength

Inactive Publication Date: 2013-05-08
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this unmodified traditional polyurethane (PU) material has very low permeability to low-concentration phenol solutions, and its selectivity is far from industrial applications.

Method used

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  • Preparation method of polyurethane pervaporation phenol/water separating membrane compounded by inorganic particles
  • Preparation method of polyurethane pervaporation phenol/water separating membrane compounded by inorganic particles
  • Preparation method of polyurethane pervaporation phenol/water separating membrane compounded by inorganic particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Synthesis of carbon fiber powder-1 composite polyurethane

[0030] Add 10.18g of hydroxyl-terminated polybutadiene (the hydroxyl value of hydroxyl-terminated polybutadiene is 0.82 mol / g) into a 250ml three-necked flask equipped with nitrogen protection, mechanical stirring and condensing reflux tube. Dehydration treatment) and 10ml N,N-dimethylacetamide (density 0.94~0.942g / ml, purified by vacuum distillation before use), after the two form a uniform solution under stirring, then toluene diisocyanate monomer 1.4754 g (molecular weight is 174.16, the number of moles is twice the number of moles of hydroxyl-terminated polybutadiene) and 0.02g of the catalyst dibutyltin dilaurate (mass is 0.2% of the mass of hydroxyl-terminated polybutadiene) are added to the above solution to make The reaction was carried out for 1 hour under stirring and heating in a water bath at 30°C to obtain a diisocyanate-terminated prepolymer; then 0.4138g of 4,4'-diaminodiphenylmethane (molecular ...

Embodiment 2

[0038] 1) Synthesis of silica-filled polyurethane prepolymer

[0039] Add 10.43g of hydroxyl-terminated polybutadiene into a 250ml three-necked flask equipped with nitrogen protection, mechanical stirring and reflux tube. (The hydroxyl value of hydroxyl-terminated polybutadiene is 0.82mol / g. It is dehydrated under reduced pressure at 110°C before use. Treatment) and 10mlN,N-dimethylacetamide (density 0.094~0.942, purified by vacuum distillation before use), after the two form a uniform solution under stirring, then 1.5099g toluene diisocyanate monomer (molecular weight is 174.16, the number of moles is twice the number of moles of hydroxy-terminated polybutadiene) and 0.02g of the catalyst dibutyltin dilaurate (the mass is 0.2% of the mass of hydroxy-terminated polybutadiene) are added to the above solution, and it is stirred and heated for 60%. Reacted for 1 hour under heating in a water bath at ℃ to obtain a diisocyanate-terminated prepolymer; then 0.4262g of 4,4'-diaminodiphen...

Embodiment 3

[0046] 1) Synthesis of carbon fiber powder-2 composite polyurethane

[0047] Add 10.84g of hydroxyl-terminated polybutadiene into a 250ml three-necked flask equipped with nitrogen protection, mechanical stirring and condensing reflux tube (the hydroxyl value of hydroxyl-terminated polybutadiene is 0.82mol / g, and it is dehydrated under reduced pressure at 110°C before use. Treatment) and 10ml N,N-dimethylacetamide (density 0.094~0.942, purified by vacuum distillation before use), after the two form a uniform solution under stirring, then 1.5631g toluene diisocyanate monomer (molecular weight is 174.16, the number of moles is twice the number of moles of hydroxy-terminated polybutadiene) and 0.02g of the catalyst dibutyltin dilaurate (the mass is 0.2% of the mass of the hydroxy-terminated polybutadiene) are added to the above solution, and it is stirred and heated for 30%. Reacted for 1 hour under heating in a water bath at ℃ to obtain a diisocyanate-terminated prepolymer; then 0.4...

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Abstract

The invention discloses a preparation method of a polyurethane pervaporation phenol/water separating membrane compounded by inorganic particles, and belongs to the field of pervaporation membrane separation. The polyurethane membrane basic material is obtained by polymerizing and mixing monomer hydroxyl-terminated polybutadiene, toluene diisocynate, 4,4'-diamine diphenylmethane solution, cyclodextrin and silica or carbon fiber powder. The preparation method comprises the following steps: reacting hydroxyl-terminated polybutadiene with toluene diisocynate to obtain blocked prepolymer, then adding 4,4'-diamine diphenylmethane solution and cyclodextrin as chain extenders to perform the chain extension, and adding inorganic modified particle silica or carbon fiber powder (using N,N-dimethylacetamide as solvent) to obtain prepolymer solution of polyurethane; casting the solution on a polyfluortetraethylene plate to form a membrane, solidifying for 1-1.5 hours at room temperature, and moving the membrane to an oven at 80 DEG C to thermally treat to obtain the polyurethane membrane compounded by inorganic particles. The preparation method disclosed by the invention is simple in process, and the prepared membrane has good heat and chemical stability and mechanical property.

Description

Technical field: [0001] The invention relates to a preparation method of an inorganic particle composite polyurethane membrane that can be used to separate phenol / water by a pervaporation method, and belongs to the technical field of pervaporation membrane separation. Background technique: [0002] Pervaporation (PV) is a process that uses the difference in the dissolution and diffusion rate of the components through the membrane to achieve component separation under the impetus of the vapor pressure difference of the components of the liquid mixture. It is a very promising membrane separation technology, and it is increasingly recognized as an energy-saving and high-efficiency technology that can replace traditional separation methods such as distillation and liquid-liquid extraction. It can be applied to the dehydration of organic solvents and the removal of organic matter (such as aromatic compounds) in water. ), polar / non-polar separation (such as alcohol / aliphatic compounds)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/54B01D69/12B01D67/00B01D61/36
Inventor 叶宏陈晓培王玉王静
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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