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Cellulose antibacterial composite film made from pineapple leaves, and production method and application thereof

A cellulose film and pineapple leaf technology, applied in the field of film manufacturing, can solve the problems of easy deterioration and failure, short storage time of composite film, high preparation cost, and achieve the effects of low cytotoxicity, obvious effect and simple method

Inactive Publication Date: 2018-09-04
TAIZHOU LIWEI ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the composite membrane has a short storage time, is prone to deterioration and failure, and has high preparation costs.

Method used

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  • Cellulose antibacterial composite film made from pineapple leaves, and production method and application thereof
  • Cellulose antibacterial composite film made from pineapple leaves, and production method and application thereof
  • Cellulose antibacterial composite film made from pineapple leaves, and production method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1 makes the preparation of cellulose antibacterial composite film with pineapple leaf

[0033] Follow the steps below:

[0034] (1) Extract cellulose from pineapple leaves: dry the pineapple leaves, crush them, and pass through a 100-mesh sieve to obtain pineapple leaf powder; add the pineapple leaf powder to 2mol / L NaOH solution, shake and react at 50°C for 3h to activate, filter, and use pure water After washing to neutrality, dry, add the solid to the mixed enzyme solution of 100U / g pectinase and 100U / g amylase containing 0.01mol / L pyridinium salt ionic liquid, microwave frequency is 2500MHz, microwave power is 500W, microwave After extracting for 2 hours, filter, concentrate in a water bath to 1 / 4 volume, and dry to obtain cellulose powder with a yield of 77%;

[0035] (2) Preparation of pineapple leaf cellulose film: Dissolve 100 g of cellulose powder prepared in step (1) in 500 mL of absolute ethanol, ultrasonicate at 700 W for 30 min to form a film li...

Embodiment 2

[0039] Embodiment 2 makes the preparation of cellulose antibacterial composite film with pineapple leaf

[0040] Follow the steps below:

[0041] (1) Extract cellulose from pineapple leaves: dry the pineapple leaves, crush them, and pass through a 100-mesh sieve to obtain pineapple leaf powder; add the pineapple leaf powder to 5mol / L NaOH solution, shake and react at 50°C for 3h to activate, filter, and use pure water After washing to neutrality, dry, add the solid to the mixed enzyme solution of 200U / g pectinase and 150U / g amylase containing 0.01mol / L imidazolium salt ionic liquid, microwave extraction for 2h and filter, microwave frequency 2500MHz, microwave With a power of 700W, concentrate in a water bath to 1 / 4 volume, and dry to obtain cellulose powder with a yield of 91%;

[0042](2) Preparation of pineapple leaf cellulose film: Dissolve 100 g of cellulose powder prepared in step (2) in 500 mL of absolute ethanol, ultrasonicate at 500 W for 30 min to form a film liquid...

Embodiment 3

[0046] Embodiment 3 makes the preparation of cellulose antibacterial composite film with pineapple leaf

[0047] Follow the steps below:

[0048] (4) Extract cellulose from pineapple leaves: dry the pineapple leaves, crush them, and pass through a 100-mesh sieve to obtain pineapple leaf powder; add the pineapple leaf powder to 5mol / L NaOH solution, shake and react at 50°C for 3h to activate, filter, and use pure water After washing to neutrality, dry, add the solid to the mixed enzyme solution of 200U / g pectinase and 150U / g amylase containing 0.01mol / L imidazolium salt ionic liquid, microwave extraction for 2h and then filter, microwave frequency 3000MHz, microwave With a power of 700W, concentrate in a water bath to 1 / 4 volume, and dry to obtain cellulose powder with a yield of 84%;

[0049] (5) Preparation of pineapple leaf cellulose film: Dissolve 100 g of cellulose powder prepared in step (2) in 1500 mL of absolute ethanol, ultrasonicate at 500 W for 30 min to form a film...

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Abstract

The invention discloses a production method of a cellulose antibacterial composite film. The method comprises the following steps: (1) drying the pineapple leaves in the sun, crushing the pineapple leaves, sieving the crushed pineapple leaves by a 100 mesh sieve to obtain pineapple leaf powder, adding the pineapple leaf powder into a NaOH solution, activating the pineapple leaf powder, filtering the pineapple leaf powder, washing the pineapple leaf powder with pure water, drying the washed pineapple leaf powder, adding the dried pineapple leaf powder into an enzyme extracting solution containing an ionic liquid, performing microwave extraction, filtering the obtained extract, concentrating the filtered extract, and drying the concentrated extract to obtain cellulose powder; (2) dissolvingthe cellulose powder prepared in step (1) in ethanol, performing ultrasonic treatment to prepare a film solution, performing curtain casting to form a film, immersing the film in water, and taking outthe film to obtain a pineapple leaf cellulose film; and (3) adding graphene oxide-zinc nano-compound into water, performing ultrasonic treatment to obtain a uniform dispersion, immersing the pineapple leaf cellulose film produced in step (2) in the dispersion, taking out the film, and drying the film to obtain the graphene oxide-zinc nano-compound cellulose antibacterial composite film. The antibacterial composite film has the advantages of non-toxicity, degradability, good antibacterial effect, economic property and environmental protection.

Description

technical field [0001] The invention relates to the field of thin film manufacturing, in particular to a method for preparing an antibacterial composite membrane material. Background technique [0002] The annual output of pineapple in my country is high, among which it reached 1.386 million tons in 2013. Pineapple leaf fiber has health properties such as antibacterial and deodorizing, and its development and utilization have great development prospects. The fiber macromolecules in the crystalline region of pineapple leaf fibers are arranged neatly and regularly, and the polyhydroxy structure and strong hydrogen bonding of cellulose molecules make them have high crystallinity and orientation, and low chemical reactivity, which limits its application. Therefore, improving the added value of pineapple leaf fiber through deep processing, so that it can be widely used in many fields, has important economic value and practical significance for promoting the development of pineap...

Claims

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Application Information

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IPC IPC(8): C08J7/06C08J5/18C08L1/02C08K3/04C08K3/08D21B1/30D21C5/00D21H11/12
CPCC08J5/18C08J7/06C08J2301/02C08K3/042C08K2003/0893C08K2201/011D21B1/306D21C5/005D21H11/12
Inventor 许希杰
Owner TAIZHOU LIWEI ENVIRONMENTAL TECH CO LTD
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