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Cellulose grafted copolyacrylamide composition with controllable molecular weight and application thereof

A graft copolymerization technology of acrylamide and acrylamide monomer, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of excessive mutual repulsion, strong negative charge, unfavorable flocculation, etc., to improve flocculation performance, The effect of reducing the actual dosage

Active Publication Date: 2019-11-15
GUANGDONG IND TECHN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, when the carboxyl content is too much, that is, the molecular weight of the grafted copolymerized acrylamide of carboxymethyl cellulose is too large, the negative charge of the molecule itself is too strong, and the mutual repulsion between the molecules will be too large, which is not conducive to flocculation. effect

Method used

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  • Cellulose grafted copolyacrylamide composition with controllable molecular weight and application thereof
  • Cellulose grafted copolyacrylamide composition with controllable molecular weight and application thereof
  • Cellulose grafted copolyacrylamide composition with controllable molecular weight and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] This embodiment provides a cellulose graft copolymerized acrylamide composition with controllable molecular weight, such as figure 1 As shown, the cellulose graft copolymerized acrylamide composition with controllable molecular weight is prepared by the following method:

[0037] S1. Accurately weigh 1g of sodium carboxymethylcellulose and place it in a four-necked bottle, add 100mL of distilled water to it and stir to dissolve in a constant temperature water bath;

[0038] S2. Pass nitrogen into the four-necked bottle for 10 minutes, exhaust the air in the four-necked bottle, then add 1% potassium persulfate and 1% sodium bisulfite as double initiators, stir evenly; slowly add acrylamide monomer solution, Adjusting the pH value, sealing the four-necked bottle to carry out the polymerization reaction; continuing to feed nitrogen in the whole step S2 until the polymerization reaction ends;

[0039] S4, after the polymerization reaction is completed, pour the obtained re...

Embodiment 2

[0044] This example aims to further verify the performance of the cellulose graft copolymerized acrylamide composite with controllable molecular weight prepared by the preparation method described in Example 1 through experiments.

[0045] 1. Test equipment

[0046]DK-S22 electric heating constant temperature water bath (Shanghai Jinghong Experimental Equipment Co., Ltd.);

[0047] Electronic analytical balance (Mettler-Toledo Instruments (Shanghai) Co., Ltd.);

[0048] JJ-1 timing electric stirrer (Jiangsu Jintan Zhengji Instrument Co., Ltd.); DZF-6021 vacuum drying oven (Shanghai Jinghong Experimental Equipment Co., Ltd.);

[0049] 721 spectrophotometer (Beijing General Analysis General Instrument Co., Ltd.).

[0050] 2. Reagents and raw materials

[0051] Sodium carboxymethylcellulose; analytically pure, Tianjin Yongda Chemical Reagent Co., Ltd.

[0052] Acrylamide (AM): analytically pure, Shanghai Macklin Biochemical Co., Ltd.

[0053] Double initiator: 1% potassium p...

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Abstract

The invention discloses a cellulose grafted polyacrylamide composition with controllable molecular weight and an application thereof. According to the invention, through bonding of carboxyl and hydroxyl functional groups in CMC with an olefin bond of polyacrylamide to regulate and control the flocculation performance of PAM, the molecular weight of the cellulose grafted polyacrylamide compositioncan be controlled, so the product requirements of the cellulose grafted polyacrylamide composition under different conditions are met; and when the cellulose grafted polyacrylamide composition is applied in wastewater treatment, the flocculation performance can be improved, and the actual usage amount of the cellulose grafted polyacrylamide composition is reduced.

Description

technical field [0001] The invention relates to the technical field of preparation of water treatment agents, in particular to a cellulose graft copolymerized acrylamide composition with controllable molecular weight and its application. Background technique [0002] Polyacrylamide, an inorganic high-particle material, is a water treatment agent widely used in sewage flocculation and sedimentation and sludge dewatering processes. A large number of studies in the past have shown that its mechanism of action is attributed to multiple modes of action such as trapping and bridging, which is due to its long-chain structure and structure containing amide groups that are charged and have water-soluble and hydrophilic properties. Its flocculation treatment effect is far superior to other polymer materials. Although it is used in a small amount in the water treatment process, its extensive and long-term application has increased the total amount discharged into the environment, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/02C08F220/56C02F1/56
CPCC02F1/56C08F251/02C08F220/56
Inventor 万俊杰冯新赵娜林达武陈洁花周明珠梁志鹏肖晓明区柏豪李淑彬
Owner GUANGDONG IND TECHN COLLEGE
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