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Pickering emulsion based on pineapple peel residue nanocellulose and preparation method of Pickering emulsion

A technology of nano-cellulose and pineapple pomace, applied in the field of new materials, can solve problems such as difficult application and short storage period

Inactive Publication Date: 2021-07-30
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing Pickering emulsions prepared by nanocellulose generally have the problem of short storage period, which is difficult for practical application.

Method used

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  • Pickering emulsion based on pineapple peel residue nanocellulose and preparation method of Pickering emulsion
  • Pickering emulsion based on pineapple peel residue nanocellulose and preparation method of Pickering emulsion
  • Pickering emulsion based on pineapple peel residue nanocellulose and preparation method of Pickering emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A kind of Pickering emulsion based on pineapple pomace nano cellulose, its preparation method comprises the following steps:

[0033] 1) Grind the pineapple peel cellulose and pass it through a 100-mesh sieve, then disperse 1g of pineapple peel cellulose, 0.0016g of TEMPO and 0.016g of sodium bromide in 100mL of water, stir for 10min, and then add 15mL of available chlorine Sodium hypochlorite solution with content ≥ 7.5%, and use 0.5mol / L sodium hydroxide solution and 0.5mol / L hydrochloric acid solution to control the pH of the reaction solution to 10, react for 6h, then drop 5mL of absolute ethanol to terminate the reaction , filter, and then wash the filtered product to neutrality, add water and carry out ultrasonic homogenization at 4°C, the ultrasonic power is 400W, and the ultrasonic time is 20min to obtain TEMPO oxidized nanocellulose (PTNc) with a solid content of 0.1%. suspension;

[0034] 2) Mix the TEMPO-oxidized nanocellulose suspension as the water phase w...

Embodiment 2

[0044] A kind of Pickering emulsion based on pineapple pomace nano cellulose, its preparation method comprises the following steps:

[0045] 1) The preparation of the nanocellulose suspension oxidized by TEMPO is the same as in Example 1;

[0046] 2) Mix the TEMPO oxidized nanocellulose suspension as the water phase with the oil phase corn oil, adjust the oil-water ratio (the mass ratio of the oil phase and the water phase) to 5:5, and adjust the pH of the mixed solution to 2, 4, 6, 8, 10 and 12, ultrasonic homogenization was carried out at 4°C, the ultrasonic power was 400W, and the ultrasonic time was 5min to obtain the Pickering emulsion based on pineapple pomace nanocellulose. Comparative example 2:

Embodiment 3

[0053] A kind of Pickering emulsion based on pineapple pomace nano cellulose, its preparation method comprises the following steps:

[0054] 1) The preparation of the nanocellulose suspension oxidized by TEMPO is the same as in Example 1;

[0055] 2) The nano-cellulose suspension oxidized by TEMPO is used as the water phase and the oil phase corn oil is mixed, and the oil-water ratio (the mass ratio of the oil phase and the water phase) is adjusted to be 5:5, and the inorganic salt sodium chloride is added, and the concentration of the inorganic salt is 0, 35mmol / L, 70mmol / L, 105mmol / L and 140mmol / L, and adjust the pH of the mixed solution to 7, carry out ultrasonic homogenization at 4°C, the ultrasonic power is 400W, and the ultrasonic time is 5min. Pickering emulsion of pomace nanocellulose.

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Abstract

The invention discloses a Pickering emulsion based on pineapple peel residue nano cellulose and a preparation method of the Pickering emulsion. The preparation method of the Pickering emulsion based on pineapple peel residue nanocellulose comprises the steps of 1) dispersing pineapple peel residue cellulose, TEMPO and sodium bromide in water, then adding sodium hypochlorite, and carrying out an oxidation reaction to obtain a TEMPO oxidized nanocellulose suspension; and 2) mixing the TEMPO oxidized nanocellulose suspension as a water phase and an oil phase, adding inorganic salt, adjusting the pH value of the mixed solution, and homogenizing. The Pickering emulsion is prepared from the TEMPO oxidized pineapple peel residue nanocellulose, the absolute value of zeta potential of the obtained Pickering emulsion is as high as 30, the Pickering emulsion is not obviously settled or deteriorated after being stored at room temperature for 3 months, and the height of a water layer is lower than 10% of the total height after the emulsion is layered.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to a Pickering emulsion based on pineapple pomace nanocellulose and a preparation method thereof. Background technique [0002] Containing rich nutrients, pineapple is one of the most popular tropical fruits and is widely used in daily consumption and further processing. However, about 50% of the pineapple residue left after pineapple processing is directly discarded, which not only causes environmental pollution, but also causes waste of resources. In recent years, some researchers have begun to use pineapple residues to extract nanocellulose, and have achieved certain research results. [0003] Nanocellulose refers to cellulose with a nanoscale diameter. Its crystallinity, mechanical strength, specific surface area and surface activity are higher than natural cellulose, and it also has unique biocompatibility and hydrophilicity. It is often used in In the fields of biomedi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/02C08L1/04C08K3/16C08B15/02
CPCC08J3/02C08B15/02C08J2301/04C08K3/16
Inventor 黄惠华唐璐廖晶
Owner SOUTH CHINA UNIV OF TECH