Thermal response polyion liquid hydrogel for brine desalination

A polyionic liquid and brine desalination technology, which is applied in the field of thermally responsive polyionic liquid hydrogel, can solve the problems of reduced desalination effect, insignificant volume shrinkage, and water extrusion that cannot be desalinated, so as to improve the desalination effect, Avoid the effects of high energy consumption and high brine desalination

Pending Publication Date: 2022-05-03
BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of hydrogel can only achieve 35-60% salt removal rate in light brine, and unfortunately, because ordinary ionic hydrogels are not thermally responsive, it is impossible to adjust the temperature to convert partially desalinated water from the hydrogel Squeeze out of the gel, water can only be squeezed out of the hydrogel by extreme pressure
The combination of thermoresponsiveness and salt removal can be achieved

Method used

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  • Thermal response polyion liquid hydrogel for brine desalination
  • Thermal response polyion liquid hydrogel for brine desalination
  • Thermal response polyion liquid hydrogel for brine desalination

Examples

Experimental program
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Effect test

Embodiment 1

[0032] The ionic liquid monomer was synthesized from 1,4-vinylbenzyl chloride (A) and tripentylamine (B).

[0033] The first step is to synthesize the ionic liquid monomer. Pour 50ml of acetonitrile into a 200ml three-neck flask, then add 13.76g (58mmol) of tripentylamine and 10.1g (60mmol) of 1,4-vinylbenzyl chloride, stir at room temperature for 40 hours, remove the acetonitrile after the reaction, and wash with ether Three times of product, then remove the ether and dry the product in a vacuum oven at room temperature to obtain the tripentylamine-vinylbenzyl chloride ionic liquid monomer;

[0034] The second step is to polymerize and crosslink the ionic liquid monomer. The initiator adopts azobisisobutyronitrile (AIBN), and the crosslinking agent adopts polyethylene glycol dimethacrylate (Mn=550g / mol); the ionic liquid monomer synthesized in the first step of 10g is dissolved in 40g anhydrous In ethanol, add initiator and cross-linking agent, stir evenly to a colorless tr...

Embodiment 2

[0036] The ionic liquid monomer is synthesized by 1,4-vinylbenzyl chloride (A) and tributylamine (B). During gel synthesis, monomer: initiator: crosslinking agent = 100:1:0.1 (molar ratio), synthesized Ionic liquid monomer, ionic liquid monomer polymerization cross-linking method is the same as embodiment 1; Monomer structural formula is as figure 2 shown.

Embodiment 3

[0038] The ionic liquid monomer is synthesized by 1,3-vinylbenzyl bromide (A) and trihexylphosphine (B). During gel synthesis, monomer: initiator: crosslinking agent = 100:1:0.1 (molar ratio), synthesized Ionic liquid monomer, ionic liquid monomer polymerization cross-linking method is the same as embodiment 1; Monomer structural formula is as image 3 shown.

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Abstract

The invention discloses a thermal response polyion liquid hydrogel for brine desalination, an ionic liquid monomer for synthesizing the hydrogel is composed of cations with carbon-carbon double bonds and halogen anions, and the ionic liquid monomer is subjected to free radical polymerization crosslinking under the action of an initiator and a crosslinking agent to form the polyion liquid hydrogel. A hydrogel synthetic monomer is the thermal response ionic liquid, each unit in a hydrogel macromolecular structure contains halogen anions, the halogen anions in saline water are blocked from entering the hydrogel, and the halogen anions of the hydrogel cannot be extruded out along with water under the electrostatic action of a positively charged gel skeleton, so that the thermal response ionic liquid is formed. The desalting effect of the hydrogel is improved; the ionic hydrogel has thermal responsiveness, the response temperature can be adjusted from 20 DEG C to 70 DEG C, the hydrogel expands in low-temperature saline water, the expanded hydrogel can shrink at high temperature, desalted water is squeezed out in a liquid form, and saline water desalination is achieved only through narrow temperature change.

Description

technical field [0001] The invention relates to the technical field of salt water desalination, in particular to a heat-responsive polyionic liquid hydrogel for salt water desalination. Background technique [0002] According to a report released by the World Water Resources Institute, more than 1 billion people in the world currently live in water-scarce areas, and by 2025, 3.5 billion people will face water shortages. my country's coastal and inland areas are short of water resources. With the development of the national economy and society, the demand for fresh water resources is becoming increasingly urgent. As a water resource increment technology, brine desalination is an important choice to solve the problem of water shortage in water-scarce areas, and related technologies can be extended to seawater desalination, brackish water development, protection and utilization, sewage resource utilization, industrial water recycling and other fields , help the construction of...

Claims

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Application Information

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IPC IPC(8): C08J3/075C08F212/14C08F222/20C08F230/02C08L25/18C08L43/02C02F1/00
CPCC08J3/075C08F212/28C08F230/02C02F1/00C08J2325/18C08J2343/02C08F222/106
Inventor 蔡聿锋苑雪玉刘明庄正兴陈曦
Owner BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD
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