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A cold-water fish gelatin base film reinforced by a ball-rod double nanostructure and its preparation method and application

A gelatin-based film, nano-structured technology, applied in hyaluronic acid coatings, cellulose coatings, protein coatings, etc., can solve the problems of limiting cherry production, falling farmers' income, fruit waste, etc. Characteristics, the effect of good coating performance

Active Publication Date: 2022-03-29
QINGDAO AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the rain-split problem of sweet cherries has severely limited cherry production, leading to significant fruit wastage and reduced income for farmers

Method used

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  • A cold-water fish gelatin base film reinforced by a ball-rod double nanostructure and its preparation method and application
  • A cold-water fish gelatin base film reinforced by a ball-rod double nanostructure and its preparation method and application
  • A cold-water fish gelatin base film reinforced by a ball-rod double nanostructure and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment 1: the preparation of gelatin base film

[0044] The cherries (Tieton & Cerasus pseudocerasus) used in the present invention come from Yunshan Town (Qingdao, China). Sugar cane comes from Sanya City (Hainan, China). Reagents required were: Cold-water fish gelatin (CFG) was purchased from Sigma Aldrich Ltd. (Canada). Chitosan hydrochloride (CHC), sorbitol and sodium chlorite were purchased from McLean Biochemical Co., Ltd. (Shanghai, China). Sodium alginate was purchased from Guangfu Chemical Reagent Co., Ltd. (Tianjin, China). Calcium chloride was purchased from Bodie Chemical Reagent Co., Ltd. (Tianjin, China). Acetic acid was purchased from Fuyu Chemical Reagent Co., Ltd. (Tianjin, China). Glycerol and sodium hydroxide were purchased from Kangde Chemical Reagent Co., Ltd. (Yantai, China).

[0045] 1. Preparation of spherical nanoparticles (CA)

[0046] Mix SA (1.00 g) and CaCl 2 (1.00 g) were dissolved in 100 mL ultrapure water and stirred at 1000 r / ...

Embodiment 2

[0055] Example 2: Characterization of gelatin-based films

[0056] 1. Particle size (Dh), Zeta potential and dispersion index (PDI)

[0057] The Dh, zeta potential and PDI of the aqueous solution of CNC and CA nanoparticles were measured at 25°C using Nano-90ZS zeta particle size analyzer, the results are shown in Table 2 below.

[0058] Table 2. Dh, Zeta potential and PDI of CHC, SA, CA (CHC-SA) and CNC nanoparticles

[0059]

[0060] (Note: *: a-d in each column represents a significant difference (p-1 . The mass ratio of CA prepared is SA:CHC=10:1. )

[0061] The Dh, zeta potential and PDI of CHC, SA, CA and CNC nanoparticles are shown in Table 2. CHC is a positively charged polysaccharide with a zeta potential of 46.1 mV, while SA is negatively charged with a zeta potential of −63.1 mV. Therefore, CA nanoparticles can be formed by electrostatic interaction. When the ratio of CHC:SA=1:10, the zeta potential of the prepared CA is almost zero (-3.20 mV), and the partic...

Embodiment 3

[0097] Embodiment 3: field experiment

[0098] The experiment was conducted in a commercial orchard located in Yunshan Township (Qingdao, China) during 2019-2021. The orchard is located at 120°13´ east longitude, 36°77´ north latitude and 58 m above sea level. From the perspective of solving practical problems, the field experiment is divided into two stages. The survey found that local cherry planting is divided into greenhouse planting and open-air planting. The greenhouse cherries are mainly the Tieton variety, and the outdoor cherries are mainly the Red Lantern (Cerasus pseudocerasus) variety.

[0099] Therefore, in order to better test the rain-cracking resistance of the gelatin-based film, the first phase of the experiment was carried out in the greenhouse cherry orchard, and Meizao was selected as the experimental variety. The experiment time was from April 29, 2021 to May 15, 2021. The second phase of the experiment was carried out in the open-air cherry orchard, an...

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Abstract

The invention discloses a cold-water fish gelatin base film reinforced with ball-rod double nanostructures and its preparation method and application, comprising the following steps: 1) adding calcium chloride solution dropwise to sodium alginate solution to obtain calcium alginate Pre-gel, then add chitosan hydrochloride solution dropwise to the pre-gel, ultrasonically treat, centrifuge to obtain supernatant, and freeze-dry to obtain spherical nanoparticles; 2) Soak bagasse, wash and dry, bleach Add acid hydrolysis, centrifuge dialysis to neutrality, and obtain cellulose nanocrystals after freeze-drying; 3) Add sorbitol-glycerin plasticizer to the cold-water fish gelatin solution reinforced with ball-rod double nanostructures and stir evenly, and degas it by ultrasonic ; 4) The coating solution is processed by casting method to obtain gelatin base film, meanwhile, the film properties can be improved by magnetic field treatment. The cold-water fish gelatin base film prepared by the invention can be used to reduce fruit cracking of cherries in rain, and has biodegradability, safety and non-toxicity.

Description

technical field [0001] The invention relates to the technical field of gelatin base film, in particular to a cold-water fish gelatin base film reinforced with ball-rod double nanostructures, a preparation method and application thereof. Background technique [0002] Sweet cherry is an important economic crop, native to Southern Europe and Southwest Asia, and has now spread to more than 70 temperate countries and regions around the world. At present, China's sweet cherry planting area is nearly 153,000 hectares, which makes China the country with the largest planting area in the world. Therefore, sweet cherries have become the main source of income for farmers in many areas, such as Yunshan Town, Pingdu City. However, the rain cracking problem of sweet cherries has severely limited the production of cherries, resulting in serious fruit wastage and a decrease in farmers' income. According to data, in May 2020, in Qingdao, China, the fruit cracking rate of Mizao cherries was ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D189/00C09D101/04C09D105/04C09D105/08C09D7/65
CPCC09D189/00C09D7/65C09D7/70C08L2205/18C08L2205/14C08L2201/06C08L2201/14C08L1/04C08L5/04C08L5/08
Inventor 张双灵杨硕姜文利薛长晖曲忠峰陈宁陈成旺程小芳康梦晨李镇儒
Owner QINGDAO AGRI UNIV
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