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A kind of high-throughput anti-pollution reverse osmosis membrane and preparation method thereof
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A reverse osmosis membrane and anti-pollution technology, applied in the direction of reverse osmosis, semi-permeable membrane separation, chemical instruments and methods, etc., can solve the problem of water flux decline, and achieve the goals of reducing adsorption, improving water flux, and excellent adsorption performance Effect
Active Publication Date: 2022-02-08
恩泰环保科技(常州)有限公司
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The present invention aims to provide a high water flux anti-pollution reverse osmosis membrane and its preparation method, to solve the problem of water flux decline after coating the polyvinyl alcohol protective layer, and simultaneously improve the anti-pollution performance of the reverse osmosis membrane, so that The reverse osmosis membrane can still maintain excellent water flux and desalination rate after the surface water is washed and polluted for a long time
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Embodiment 1
[0034] A high-flux anti-fouling reverse osmosis membrane, which sequentially includes a polysulfone-based membrane layer, a polyamide desalination layer and a polyvinyl alcohol protective layer from bottom to top;
[0035] Described polyvinyl alcohol protective layer comprises the component of following mass parts: 1 part of polyvinyl alcohol, 0.5 part of nano-titanium dioxide modified clay mineral, 0.2 part of 3-aminopropyl silane triol and acid curing agent;
[0036] The nano-titanium dioxide modified clay mineral is nano-titanium dioxide modified attapulgite, and the acidic curing agent is citric acid, wherein the amount of citric acid is such that the pH of the modified polyvinyl alcohol protection solution is 5-6.
[0037] A method for preparing a high-throughput anti-fouling reverse osmosis membrane, comprising the steps of:
[0038] (1) First measure 10mL of 2.5mol / L TiCl 4The solution is in a three-necked flask, and the pH value of the solution is adjusted to neutrali...
Embodiment 2～5
[0047] A high-flux anti-fouling reverse osmosis membrane, which sequentially includes a polysulfone-based membrane layer, a polyamide desalination layer and a polyvinyl alcohol protective layer from bottom to top;
[0048] Described polyvinyl alcohol protective layer comprises the component of following mass parts: 1 part of polyvinyl alcohol, 0.5 part of nano-titanium dioxide modified clay mineral, 0.2 part of 3-aminopropyl silane triol and acid curing agent;
[0049] Described nano titanium dioxide modified clay mineral is nano titanium dioxide modified attapulgite, and described acid curing agent is citric acid, and wherein, the consumption of citric acid makes the pH of modified polyvinyl alcohol protection solution be 5-6 as the criterion;
[0050] Wherein, the nano-titanium dioxide in the nano-titanium dioxide modified attapulgite and the mass ratio of attapulgite in Examples 2-5 are different, as shown in Table 1.
[0051] The preparation method of high-throughput anti-...
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Abstract
The invention belongs to the technical field of reverse osmosis membranes, and in particular relates to a high-throughput anti-pollution reverse osmosis membrane and a preparation method thereof. The reverse osmosis membrane includes a polysulfone-based membrane layer, a polyamide desalination layer and a polyvinyl alcohol protective layer from bottom to top; the polyvinyl alcohol protective layer includes the following components by mass: 1 part of polyvinyl alcohol, Nano titanium dioxide modified clay mineral 0.02-0.1 part and 3-aminopropyl silane triol 0.2 part. The invention also provides a preparation method of the high flux anti-fouling reverse osmosis membrane. The invention solves the problem of water flux decline after the polyvinyl alcohol protective layer is coated, and at the same time improves the anti-pollution performance of the reverse osmosis membrane, so that the reverse osmosis membrane can still maintain excellent water flux and desalination after the surface water is washed and polluted for a long time Rate.
Description
technical field [0001] The invention belongs to the technical field of reverse osmosis membranes, in particular to a high-flux anti-pollution reverse osmosis membrane and a preparation method thereof. Background technique [0002] With the intensification of global industrialization and the rise of printing and dyeing, electronics, chemical and other industries, the problem of water pollution has become increasingly serious. How to effectively recycle, purify and reuse water resources has become one of the major issues facing human society. Compared with traditional treatment methods, membrane separation water treatment technology has many advantages such as low energy consumption, good water quality, high recovery rate, and large water production volume, and has gradually become the mainstream technology in the field of water treatment. At present, separation membranes have been widely used in brackish water desalination, seawater desalination, urban sewage reuse, househol...
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