Unlock instant, AI-driven research and patent intelligence for your innovation.

Membrane comprising self-assembled block copolymer and method of making same by mixing casting (ib)

A diblock copolymer, selected technology, used in chemical instruments and methods, membranes, membrane technology, etc.

Inactive Publication Date: 2018-05-29
PALL CORP
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although self-assembled structures are advantageous because they produce membranes with uniform pore size and pore size distribution, the proposed block copolymers and methods remain challenging or difficult

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Membrane comprising self-assembled block copolymer and method of making same by mixing casting (ib)
  • Membrane comprising self-assembled block copolymer and method of making same by mixing casting (ib)
  • Membrane comprising self-assembled block copolymer and method of making same by mixing casting (ib)

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0121] The homopolymers formed during the preparation of the diblock copolymers of the present invention, as well as the diblock copolymers, can be characterized by any known technique for their molecular weight and molecular weight distribution. For example, MALS-GPC technology can be used. This technique uses mobile phase elution, and by means of a high pressure pump, the polymer solution is passed through a column stack packed with stationary phase. The stationary phase separates the polymer sample according to chain size and then detects the polymer by three different detectors. A series of detectors can be used, for example, an ultraviolet detector (UV-detector), followed by a multi-angle laser light scattering detector (MALS-detector), in turn, followed by a refractive index detector (RI-detection). device). The UV-detector measures the light absorption of the polymer at a wavelength of 254 nm; the MALS-detector measures the scattered light of the polymer chains relati...

Embodiment 1

[0164] This example describes some of the materials used in the preparation of monomers and polymers

[0165] Maleimide, furan, diisopropyl azodicarboxylate (DIAD), triphenylphosphine (Ph 3 P), 1-hexadecanol, tetrahydrofuran (THF), ethyl acetate, N-phenylmaleimide, acetonitrile, methanol, Grubbs secondary catalyst, 3-bromopyridine, and pentane, from Sigma- Aldrich obtained and used without further processing. Dichloropentane, also obtained from Sigma-Aldrich, was treated with basic alumina prior to use.

Embodiment 2

[0167] This example illustrates exo-7-oxanorbornene-5,6-dicarboxyimide (C1), an intermediate in the preparation of the first and second monomers according to embodiments of the present invention. preparation.

[0168] In a clean 500 mL round bottom flask (RBF) equipped with a magnetic stir bar, furan (21 g, 309 mmol) was added to a solution of maleimide (25 g, 258 mmol) in 250 mL of ethyl acetate. The mixture was heated at 90 °C for 30 h. Rinse with ether (100 mL, 3X) and filter to give C1 as a white precipitate from solution. The white solid was dried under vacuum at room temperature for 24 h. C1 was obtained as the pure exo isomer in 29 g, 68% yield. 1 H-NMR (300MHz, CDCl 3 ): δ (ppm) 8.09 (s, 1H), 6.53 (s, 2H), 5.32 (s, 2H), 2.89 (s, 2H).

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
number average molecular weightaaaaaaaaaa
Login to View More

Abstract

Disclosed are membranes formed from self-assembling diblock copolymers of the formula (I): wherein R 1 -R 4 , n, and m are as described herein, which find use in preparing porous membranes. Embodiments of the membranes contain the diblock copolymer that self-assembles into a cylindrical morphology. Also disclosed is a method of preparing such a membrane which involves hybrid casting a polymer solution containing the diblock copolymer to obtain a thin film, followed by evaporation of some of the solvent from the thin film, and coagulating the resulting this film in a bath containing a nonsolvent or poor solvent for the diblock copolymer.

Description

Background technique [0001] Membranes, especially nanoporous membranes, are well known for use in many fields, including filtration of biological fluids, removal of micro-pollutants, water softening, wastewater treatment, dye retention, ultrapure water preparation in the electronics industry, and food, juice or Concentration of milk. Methods involving block copolymers that self-assemble into nanostructures have been proposed for the preparation of nanoporous membranes. While self-assembled structures are advantageous because they produce membranes with uniform pore size and pore size distribution, the proposed block copolymers and methods remain challenging or difficult. For example, in some of these methods, a membrane is first produced from a block copolymer and then one of the blocks of this block copolymer is removed by using a caustic chemical, such as a strong acid or base. [0002] The foregoing shows that there is an unmet need for membranes prepared from block copol...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/26C08J5/18C08L53/00
CPCB01D71/80B01D67/0016B01D69/02B01D71/52B01D71/62B01D71/72B01D2325/022
Inventor K·A-H·H·阿穆尔D·L·格勒兹尼亚
Owner PALL CORP