Preparing process and application of composite biolipid/cellulose acetate membrane

A technology of cellulose acetate and cellulose acetate, which is applied in the application of pre-enrichment and removal, the preparation of biological ester/cellulose acetate composite membrane, and the regeneration of the above-mentioned composite membrane, can solve the problem of reducing enrichment efficiency, Problems such as slow enrichment rate of lipophilic organic pollutants and inability to purify

Inactive Publication Date: 2003-02-12
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
View PDF0 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the device formed by this technology is simple in structure, and the encapsulated ester is easy to flow between two layers of low-density plastic films, and forms ester droplets, which reduces the enrichment efficiency; the low-density polyethylene film used to encapsula

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
  • Preparing process and application of composite biolipid/cellulose acetate membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: cellulose acetate-trioleate composite film (wherein trioleate content 0.5%)

[0018] The formula of the film used in the experiment is as follows: the weight of each component is 18 g of cellulose acetate, 10 g of dioxane, 70 g of acetone, 2 g of magnesium perchlorate, and 1.5 g of neutral fat. Film-making process: L-S phase inversion method; evaporation time is 60 seconds, and the temperature of the cold dipping solution is 23-24°C. figure 1 It is the scanning electron micrograph of the front, back and cross-section of the composite membrane. Table 1 is the basic physical and chemical properties of the composite membrane prepared.

[0019] Mechanical strength (kg)

Embodiment 2

[0020] Embodiment 2: Utilize the cellulose acetate-trioleate (1.5%) composite membrane material of making to enrich the organochlorine pesticide in water

[0021] About 0.1 g of the above-mentioned composite membrane material was put into flowing water prepared in the laboratory, in which the concentration of each of the five organochlorine pesticides was 2 μg / L. During the experiment, samples were taken at intervals of 0.5, 1, 2, 4, 8, 14, and 20 days, and were dialyzed through hexane for 24 hours. The concentration of organochlorine pesticides in hexane was analyzed by GC / ECD, and converted into the concentration of pesticides in the cellulose acetate composite film. content. The chromatographic analysis conditions are: HP5890GC / ECD detector, HP-5 type 60m×0.32m×0.25um quartz capillary column, carrier gas: high-purity N 2 ;Initial temperature: 85°C, rise to 180°C at 10°C per minute, stay for 15 minutes; rise to 280°C at 20°C per minute, stay for 20 minutes. Injection port ...

Embodiment 3

[0025] Embodiment 3: Utilize the cellulose acetate-trioleate (1.5%) composite membrane material that makes to purify organochlorine slightly polluted water body

[0026] Six organochlorine pesticides in water were simulated in the laboratory, namely trifluralin, lindane, heptachlor, aldrin, dieldrin, and DDT, and the initial concentration was set to 10 μg / L. Take 50ml of simulated water and 0.1g of membrane material into a 100ml Erlenmeyer flask at the same time, shake at a low speed on a shaker. After 1, 2, 4, 8, 12, 24, 48, and 96 hours, remove the triangular flask, take out the membrane carefully, blot the moisture on the membrane with soft paper, weigh and record immediately. The membrane was dialyzed in 20 ml of hexane in the dark. After 24 hours, the membrane dialysis was complete, and 5 ml of the dialysate was concentrated to 0.2 ml for analysis.

[0027] Add recovery indicators 2,4,5,6-tetrachloro-m-xylene and PCB-209 to the simulated water in the triangular flask, e...

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

A process for preparing biological ester/cellulose acetate composite membrane for sampling the toxic organic pollutants in environment monitor and removing them from water includes such steps as dissolving the cellulose acetate in solvent, adding biological ester, and preparing membrane by the L-S phase transfer method. The membrane contains cellulose acetate, dioxane, acetone, magnesium perchlorate, and neutral ester in a certain proportion.

Description

technical field [0001] The invention relates to the technical field of environmental monitoring and pollution control, in particular to a preparation method of a biological ester / cellulose acetate composite film. [0002] The invention also relates to the application of the composite material membrane in the pre-concentration and removal of organic pollutants in water environment. [0003] The present invention also relates to a method for regenerating the above-mentioned composite material membrane. Background technique [0004] The method of separating, grading, purifying and enriching two-component or multi-component solutes and solvents with natural or synthetic polymer films, driven by external energy or chemical potential difference, is collectively referred to as membrane separation method . Synthetic membranes can be divided into organic (polymer) membranes and inorganic membranes, where the most important membrane material is organic matter, that is, polymers or m...

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
IPC IPC(8): B01D71/16
Inventor 王子健吕怡兵王静荣
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap