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High flux fluid separation membranes comprising a cellulose or cellulose derivative layer

一种纤维素衍生物、纤维素的技术，应用在半透膜分离、膜、涂层等方向

Active Publication Date: 2010-06-02
THE RES FOUND OF STATE UNIV OF NEW YORK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another disadvantage in the preparation of conventional composite membranes is the use of volatile organic solvents and caustic alkaline solutions for the hydrolysis of cellulose esters in organic solvents

Method used

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  • High flux fluid separation membranes comprising a cellulose or cellulose derivative layer
  • High flux fluid separation membranes comprising a cellulose or cellulose derivative layer
  • High flux fluid separation membranes comprising a cellulose or cellulose derivative layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0130] Embodiment 1. Preparation of 1-butyl-3-methylimidazolium chloride (BCl)

[0131] Preparation of 1-butyl-3-methylimidazolium chloride (BCl): 1-butyl-3-methylimidazolium chloride was prepared by the following method: 1-methylimidazole and 1-chloro A mixture of butane (molar ratio 1:1) was heated for 24 h, followed by three washes with ether. The chemical structure of ionic liquids is given by 1 H NMR confirmed and shown in Scheme 1(I). The structure of another ionic liquid, 1-ethyl-3-methylimidazolium acetate, purchased from Aldrich is shown in Scheme 1(II).

[0132]

[0133] Scheme 1. Chemical structures of 1-butyl-3-methylimidazolium chloride and 1-ethyl-3-methylimidazolium acetate

[0134] 1 H NMR (D 2 O as solvent, d, ppm) spectrum consists of the following peaks: 8.606 (N-CH-N, s, 1H), 7.374 (N-CH-CH, s, 1H), 7,327 (N-CH-CH, s, 1H), 4.095 (N-CH 2 , t, 2H), 3.789 (N-CH 3 , t, 2H), 1.747 (N-CH 2 -CH 2 , m, 2H), 1.229 (N-CH 2 -CH 2 -(CH 2 ) 2 , m, 2H), ...

Embodiment 2

[0135] Embodiment 2. Preparation of cellulose solution

[0136] Cellulose solutions were prepared by adding 0.02 g of different grades of cellulose to 19.98 g of each ionic liquid, then heating the mixture with an oil bath at 90° C. for 1 hour while stirring for 1 hour. After cooling to room temperature, the clear solution at a concentration of 0.1% was used.

Embodiment 3

[0137] Example 3. Preparation of electrospun carriers

[0138] All electrospun supports, including PAN, cross-linked PVA, PA, nylon-6, PES, and PSF, were performed in the laboratory using conditions similar to those described in U.S. Application Serial Nos. 11 / 664650 and 11 / 951248 prepared (except for PA and Nylon-6 vectors, which were obtained from Donaldson and DuPont, respectively), the US application sequence is hereby incorporated by reference in its entirety for all purposes.

[0139] PAN electrospun carrier: the fiber diameter is about 500nm, and the carrier thickness is 40-50μm;

[0140] PVA electrospinning carrier: the fiber diameter is about 230nm, and the carrier thickness is 40-50μm;

[0141] PA electrospun carrier: the fiber diameter is about 200nm, and the carrier thickness is 5-20μm;

[0142] Nylon-6 electrospun carrier: the fiber diameter is 500-1000nm, and the carrier thickness is about 20μm;

[0143] PES electrospun carrier: the fiber diameter is about 500...

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Abstract

The present invention provides membranes having a coating layer comprising cellulose or cellulose derivative and a porous support comprising nanofibers prepared by a process of coating a solution comprising cellulose or a cellulose derivative dissolved in an ionic liquid on to a porous support layer. The present invention is useful for providing improved water flux and high rejection rates for oil / water emulsions. The present invention also provides fluid separation systems in UF, NF, RO and FO, incorporating membranes of the present invention.

Description

[0001] government rights [0002] This invention was made with Government support under Grant No. N000140310932 to the Office of Naval Research. The government has certain rights in this invention. [0003] Cross References to Related Applications [0004] This application claims the benefit of U.S. Provisional Patent Application 60 / 931,765, filed May 26, 2007, and U.S. Provisional Patent Application 60 / 947,045, filed June 29, 2007, the entire contents of which are for all Its purpose is incorporated herein in its entirety. field of invention [0005] The present invention relates to a simple process for the preparation of cellulose and cellulose derivative composite membranes with enhanced permeate flux properties. The membranes of the present invention are useful as fluid separation membranes such as ultrafiltration membranes, nanofiltration membranes, reverse osmosis membranes and forward osmosis membranes. Background of the invention [0006] Cellulose is an abundant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D1/00
CPCB01D71/10B01D69/12B01D69/02B01D67/0013B01D71/12B01D2323/39B01D2325/20B01D2323/42
Inventor 本杰明·储本杰明·肖马鸿洋
Owner THE RES FOUND OF STATE UNIV OF NEW YORK
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