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

PHBV (Polyhydroxylbutyrate Valerate) composite membrane with high water flux, as well as preparation method and application thereof

A composite membrane and flux technology, used in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of inability to achieve filtration, poor mechanical properties, poor pressure resistance, etc. Filtration separation ability, the effect of improving feasibility

Active Publication Date: 2015-06-17
马雪原
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For PHBV, although PHBV has good thermal stability and biodegradability, the pure PHBV electrospun fiber membrane has poor mechanical properties, poor pressure resistance, and its hydrophilicity is weak, so it cannot be used for filtration.

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
  • PHBV (Polyhydroxylbutyrate Valerate) composite membrane with high water flux, as well as preparation method and application thereof
  • PHBV (Polyhydroxylbutyrate Valerate) composite membrane with high water flux, as well as preparation method and application thereof
  • PHBV (Polyhydroxylbutyrate Valerate) composite membrane with high water flux, as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 2g PHBV and dissolve it in 40ml chloroform / absolute ethanol mixed solution, adjust the volume ratio of chloroform / absolute ethanol to 3 / 1, heat it in a water bath thermostat at 60℃ for 2.5h, and configure the concentration to 5wt% Electrospinning was performed with the PHBV solution, the spinning solution advancing speed was 4mL / h, the voltage was 8kV, the receiving distance was 10cm, and PHBV fibers with an average diameter of 0.5μm were obtained, and the average fiber membrane thickness was 100μm. Weigh 0.36g of PVA and dissolve it in 1.64mL of distilled water, heat to dissolve in a water bath at 95°C, add 0.5wt% of glycerol and 0.5wt% of PEG, stir and dissolve with a magnetic stirrer, after fully dissolving, stand for defoaming to obtain A PVA solution with a concentration of 18 wt%. The PVA solution is coated on the prepared PHBV electrospun fiber membrane to obtain a PHBV / PVA composite membrane with a smooth and uniform surface. Among them, the volume ratio o...

Embodiment 2

[0029] Weigh 2.4g PHBV and dissolve it in 17.6mL chloroform / anhydrous methanol mixed solution, adjust the volume ratio of chloroform / anhydrous methanol to 90 / 10, heat it in a water bath thermostat at 60℃ for 2.5h, and configure the concentration to 12wt % PHBV solution, electrospinning, spinning solution advancing speed 1mL / h, voltage 16kV, receiving distance 25cm, to obtain PHBV fiber with a diameter of 10μm and a fiber film thickness of 150μm. Weigh 1.2g of CS and dissolve it in 28.8mL, glacial acetic acid, add 4wt% of glycerol and 3wt% of PVP, place the coating solution in a water bath at 60°C and heat to dissolve it. Under the action of a magnetic stirrer, it will be fully dissolved and statically After defoaming, a CS solution with a concentration of 4 wt% is obtained. The CS solution is coated on the prepared PHBV electrospun fiber membrane to obtain a PHBV / CS composite membrane with a smooth and uniform surface. Among them, the volume ratio of CS coating liquid to PHBV f...

Embodiment 3

[0031] Weigh 0.4g PHBV and dissolve it in 4.6mL chloroform / absolute ethanol mixed solution, adjust the volume ratio of chloroform / absolute ethanol to 5 / 1, heat it in a water bath thermostat at 60℃ for 2.5h, and configure the concentration as Electrospinning was performed with 8wt% PHBV solution, spinning solution advancing speed 1.5mL / h, voltage 12kV, receiving distance 15cm, and obtaining PHBV fiber with diameter of 6μm and fiber film thickness of 10μm. Weigh 0.1g of PVA and dissolve in 3.8mL of water; weigh 0.12g of CS and dissolve in 7mL of formic acid, add 2.5wt% glycerol and 2.5wt% PVP, heat to dissolve in a water bath at 95℃, and stir to dissolve with magnetic stirring. The bubble is left standing to obtain a PVA / CS mixed solution with a concentration of 4wt%. The PVA / CS mixture solution is coated on the prepared PHBV electrospun fiber membrane by a casting method, wherein the volume ratio of the PVA / CS coating solution to the PHBV fiber layer is 7:3. Put the coated PHBV...

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

PropertyMeasurementUnit
thicknessaaaaaaaaaa
diameteraaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

In order to solve the defect of low water flux of an electrospun fibrous membrane in the prior art, the invention provides a PHBV (Polyhydroxylbutyrate Valerate) composite membrane with high water flux, as well as a preparation method and an application thereof. The technical scheme adopted by the invention comprises the following steps of: (1) carrying out preparation of a fibrous membrane by adopting a PHBV solution as a spinning solution and adopting a PHBV electrostatic spinning fibrous membrane as a base layer of the composite membrane; (2) dissolving a hydrophilic polymer in a solvent, then adding a plasticizing agent and a pore-forming agent into the solvent, heating, dissolving, standing, and defoaming so as to obtain a coating solution, coating the coating solution on the base layer, and drying so as to obtain the PHBV composite membrane. The invention has the advantages that by adjusting important parameters such as the concentration of the coating solution, the proportion of additives in the coating solution and the coating amount, the mechanical property, the voltage resistance and the hydrophilcity of the PHBV electrospun composite membrane are perfected, and the water flux can reach 1500L / m2h, so that the feasibility of the development by adopting PHBV as a membrane product is improved, and the filtering and separating capabilities to micro-nano-level particles and wastewater are high.

Description

Technical field [0001] The invention belongs to the field of polymer separation membranes, and particularly relates to a PHBV composite membrane. Background technique [0002] In recent years, environmental pollution and energy shortages have become more and more serious. On the one hand, the currently used composite materials are not degradable and will cause white pollution. On the other hand, most of the raw materials of polymer materials are degradation products of petroleum, and such resources are becoming increasingly scarce. Therefore, biopolymer materials have attracted more and more attention. PHBV uses industrial waste from food factories and discarded fruits as raw materials for microbial synthesis, and has good biocompatibility and biodegradability. It is an ideal environmentally friendly material. [0003] In the preparation of polymer fiber membranes, many researchers at home and abroad use electrospinning to prepare them. The fiber membrane prepared by this method...

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 Patents(China)
IPC IPC(8): B01D69/12B01D67/00B01D71/48B01D71/38B01D71/08B01D71/16
Inventor 赵晓燕赵晓画纪俊玲
Owner 马雪原
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