A kind of zein/titanium dioxide composite film and its preparation method and application

A zein, nano-titanium dioxide technology, applied in transportation and packaging, packaging, wrapping paper, etc., can solve the problems of aggravating the deterioration of the environment, slow degradation rate, etc., to increase commercial value, improve film structure, and enhance mechanical properties. and barrier properties

Active Publication Date: 2022-03-15
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to relevant data reports, the degradation rate of traditional plastics is very slow, and it will take about 100 years to achieve complete degradation, which invisibly aggravates the deterioration of the environment

Method used

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  • A kind of zein/titanium dioxide composite film and its preparation method and application
  • A kind of zein/titanium dioxide composite film and its preparation method and application
  • A kind of zein/titanium dioxide composite film and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment approach

[0046] The third embodiment of the present invention provides an application of the above-mentioned zein / titanium dioxide composite film in packaging and / or replacing traditional plastic products.

[0047] In order to enable those skilled in the art to understand the technical solution of the present invention more clearly, the technical solution of the present invention will be described in detail below in conjunction with specific embodiments.

[0048] Material:

[0049] Zein (99%, molecular weight 164.2KDa), eugenol and nano-titanium dioxide (99.8%, 25nm, anatase) were purchased from Shanghai McLean Biochemical Technology Co., Ltd. Ethanol, glycerol and Tween 20 were purchased from Sinopharm Group Chemical Reagents Ltd.

[0050] Performance test method:

[0051] (1) Tensile performance test

[0052] The tensile properties were evaluated according to ASTM standard method D882 with ZQ-990LA electric tensile and compression testing machine (ZQ, Dongguan). Tensile propertie...

Embodiment 1

[0072] Embodiment 1: the optimization of ethanol volume fraction

[0073] (1) Use deionized water as a solvent to prepare aqueous ethanol solutions with a volume fraction of 70%, 80%, and 90% v / v in a beaker, and add zein powder to the above-mentioned aqueous ethanol solutions until the solid-to-liquid ratio is 1 : 10g / ml, stir magnetically at room temperature until it dissolves completely.

[0074] (2) Take out the beaker, add 30wt.% glycerol accounting for the mass fraction of zein, and continue magnetic stirring until it is fully mixed.

[0075] (3) The fully mixed dispersion was reacted in a magnetic stirrer at 80°C for 30 minutes while stirring.

[0076] (4) After the reaction, the beaker was taken out, cooled to room temperature, and then the film-forming solution was poured into a square petri dish. Preheat the blast drying oven to 50°C, and place the culture dish in the drying oven to dry for 3 hours.

[0077] (5) The dried film was cooled to room temperature, gentl...

Embodiment 2

[0081] Embodiment 2: Optimization of solid-to-liquid ratio of zein dispersion liquid

[0082] (1) Use deionized water as a solvent to prepare an aqueous ethanol solution with a volume fraction of 80% in a beaker, and add zein powder to the above-mentioned aqueous ethanol solution until the solid-to-liquid ratio is 1:10, 1:20, and 1:1. 40. 1:70g / ml, stir magnetically at room temperature until it is completely dissolved.

[0083] (2) Take out the beaker, add glycerin which accounts for 30% of the mass fraction of zein, and continue magnetic stirring until they are fully mixed.

[0084] (3) The fully mixed dispersion was reacted in a magnetic stirrer at 80°C for 30 minutes while stirring.

[0085] (4) After the reaction, the beaker was taken out, cooled to room temperature, and then the film-forming solution was poured into a square petri dish. Preheat the blast drying oven to 50°C, and place the culture dish in the drying oven to dry for 3 hours.

[0086] (5) The dried film w...

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Abstract

The invention discloses a zein / titanium dioxide composite film and its preparation method and application. The preparation method is as follows: adding zein into an aqueous ethanol solution to prepare a dispersion liquid, adding glycerin and eugenol to the dispersion liquid to mix Afterwards, heating and reacting, then adding nano-titanium dioxide particles and emulsifiers to mix to prepare a film-forming liquid, drying the film-forming liquid to obtain a zein / titanium dioxide composite film. The composite film prepared by the invention not only solves the problem of high brittleness, but also solves the problem of poor barrier performance caused by the addition of eugenol, and at the same time, the thermal stability of the composite film prepared by the invention is greatly improved.

Description

technical field [0001] The invention relates to the technical field of preparation of edible nanocomposite films, and relates to a zein / titanium dioxide composite film, a preparation method and an application. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Traditional plastic products have the advantages of light weight, low price, convenient storage and transportation, and excellent barrier properties, so they have become one of the important components of people's convenient life. However, the ensuing environmental pollution of non-degradable plastic products cannot be ignored and has attracted increasing attention. According to relevant data reports, the degradation ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L89/00C08K3/22C08K5/053C08K5/13C08J5/18B65D65/46
CPCC08J5/18B65D65/466C08J2389/00C08K2003/2241C08K2201/011C08K5/053C08K5/13
Inventor 王佃刚肖飞虹王菁陈传忠
Owner SHANDONG UNIV
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