Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Fluorescently-labeled polyacrylamide, and preparation method and application thereof as visual soil structure improver

A polyacrylamide and fluorescent labeling technology, applied in the fields of application, soil conditioning materials, chemical instruments and methods, etc., can solve the problem that polyacrylamide solution does not achieve the effect visible to the naked eye, and can control the decomposition reaction, increase the content, low temperature effect

Inactive Publication Date: 2020-05-29
SOUTH CHINA UNIV OF TECH
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are descriptions of the improvement effect of polyacrylamide on soil at home and abroad, the position of action and migration have not been more intuitively expressed (Feng, Chuanping, Guo, et al. Effect of straw and polyacrylamide on the stability of land / water ecotone soil and the field implementation[J].Ecological engineering: The Journal of Ecotechnology,2016. Reference 2: Wang Yong, Li Fucheng, Wang Xuan, etc. Effect of polyacrylamide on cultivation displacement and soil structure of purple soil slope[J] .Journal of Soil and Water Conservation; 2017(4),51-56.), that is, the migration of the colorless and odorless polyacrylamide solution in the soil did not achieve the effect visible to the naked eye, which has great significance for the study of its improvement effect limitation

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
  • Fluorescently-labeled polyacrylamide, and preparation method and application thereof as visual soil structure improver
  • Fluorescently-labeled polyacrylamide, and preparation method and application thereof as visual soil structure improver
  • Fluorescently-labeled polyacrylamide, and preparation method and application thereof as visual soil structure improver

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The preparation of the polyacrylamide (FL-PAM) of fluorescent mark comprises the following steps (chemical reaction scheme can refer to figure 1 shown):

[0046] Add 7.1g of acrylamide, 0.0071g of FL, and 0.0071g of urea to a three-neck flask equipped with mechanical stirring, reflux condenser, and nitrogen gas, add 100mL of water to dissolve, mechanically stir at a speed of 250 r / min, and heat to After 56°C, add 0.0036 g of initiator azobisisobutylamidine hydrochloride (AIBA) and react for 6 hours. Pour the reacted product into a beaker with ethanol. After washing for five times, put it into an oven at 80° C. for drying, and grind it into uniform small particles after drying to obtain the fluorescently labeled polyacrylamide. The reference standard "GB / T 12005.10-1989 Polyacrylamide Intrinsic Viscosity Determination Method", "GB / T 12005.10-1992 Polyacrylamide Molecular Weight Determination" measures its viscosity average molecular weight to be about 5×10 6 . The flu...

Embodiment 2

[0048] The preparation of the polyacrylamide (FL-PAM) of fluorescent mark comprises the following steps (chemical reaction scheme can refer to figure 1 shown):

[0049] In a three-neck flask equipped with mechanical stirring, reflux condenser, and nitrogen gas, add 7.1g of acrylamide, FL0.0071g, without urea, add 100mL of water to dissolve, mechanically stir at a speed of 230r / min, and heat to 60 ℃, then add initiator azobisisobutylamidine hydrochloride (AIBA) 0.0071g to react for 6h, pour the reacted product into a beaker filled with ethanol, separate out and cut into pieces, replace with new ethanol and wash under mechanical stirring Five times, and then placed in an oven at 80° C. for drying, and then ground into uniform small particles to obtain the fluorescently labeled polyacrylamide. The viscosity-average molecular weight of the reference standard "GB / T 12005.10-1989 Polyacrylamide Intrinsic Viscosity Determination Method" and "GB / T 12005.10-1992 Polyacrylamide Molecul...

Embodiment 3

[0051] The preparation of the polyacrylamide (FL-PAM) of fluorescent mark comprises the following steps (chemical reaction scheme can refer to figure 1 shown):

[0052] In a three-neck flask equipped with a mechanical stirrer, a reflux condenser, and nitrogen gas, add 7.1g of acrylamide, FL 0.0213g, without urea, add 100mL of water to dissolve, mechanically stir at a speed of 210r / min, and heat to 56°C, then add 0.1065g of initiator azobisisobutylamidine hydrochloride (AIBA) to react for 6 hours, pour the reacted product into a beaker with ethanol, separate out and cut it into pieces, replace with new ethanol and stir it under mechanical stirring After washing five times, put it into an oven at 80° C. for drying, and grind it into uniform small particles after drying to obtain the fluorescently labeled polyacrylamide. The viscosity-average molecular weight of the reference standard "GB / T 12005.10-1989 Polyacrylamide Intrinsic Viscosity Determination Method" and "GB / T 12005.10...

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

No PUM Login to View More

Abstract

The invention discloses fluorescently-labeled polyacrylamide, and a preparation method and application thereof as a visual soil structure improver. The method comprises the steps: initiating an acrylamide monomer and a modified fluorescent monomer FL (4-(N'-methyl-1-piperazinyl)-N-propyl-1,8-naphthalenedicarbonyl allyl chloride quaternary ammonium salt) by using an initiator, and carrying out freeradical copolymerization reaction to generate the fluorescently-labeled polyacrylamide. The material can emit macroscopic green fluorescence under the excitation of ultraviolet light. When the material is applied to soil, the migration of polyacrylamide in the soil can be visualized, and a method is provided for subsequent research on the action of polyacrylamide in the soil. Polyacrylamide contains a large number of amide groups, and can adsorb soil particles due to hydrogen bond interaction, so that tiny particles in polyacrylamide are aggregated into stable large aggregates, the volume weight of soil is reduced, soil hardening and water and soil loss are effectively prevented and treated, and a good soil improvement effect is achieved.

Description

technical field [0001] The invention belongs to the field of material synthesis, and in particular relates to a fluorescent-labeled polyacrylamide, a preparation method thereof and its application as a visualized soil structure improver. Background technique [0002] Today, rapid population and economic growth is putting enormous challenges and pressures on land use, especially in developing countries. In order to obtain higher yields in a short period of time, people use improper farming methods or long-term single application of chemical fertilizers, etc., which eventually lead to soil degradation, especially soil compaction. Soil compaction will reduce the porosity of the soil, increase the bulk density, reduce the hydraulic conductivity, and reduce the percentage of soil stable aggregates. These influencing factors will reduce the water and fertilizer retention capacity of the soil, reduce the air content in the soil, and then affect the crop's nutrient Absorption and r...

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 Applications(China)
IPC IPC(8): C08F220/56C08F226/06C08F4/04C09K11/06C09K17/20C09K101/00
CPCC08F4/04C08F220/56C09K11/06C09K17/20C09K2101/00C09K2211/1466C08F226/06C08F2500/01
Inventor 张安强孙凯伦林雅铃喻建刚
Owner SOUTH CHINA UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com