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Preparation method and application of bamboo nano lignin sun-screening agent

A technology for sunscreen and lignin, applied in lignin coatings, preparations for skin care, pharmaceutical formulations, etc., can solve the problems of poor particle size uniformity, limited application of lignin, poor sunscreen effect, etc. Or the effect of reduced environmental irritation and good uniformity

Inactive Publication Date: 2021-03-12
INT CENT FOR BAMBOO & RATTAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the lignin obtained by processing bamboo using traditional techniques has poor particle size uniformity, dark color, and poor sunscreen effect; and contains strong acids and alkalis, which have very strong effects on the human body and the environment Irritant, which greatly limits the application of lignin in chemical industry and industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of bamboo nano lignin sunscreen, its preparation method comprises the steps:

[0034] (1) Process the bamboo into 30×5×1mm bamboo slices, wash them with distilled water until there is no sediment, and then air-dry them at room temperature;

[0035] (2) Prepare a p-toluenesulfonic acid solution with a concentration of 60%, put the bamboo slices in the p-toluenesulfonic acid solution and cook at 90°C for 60 minutes;

[0036] (3) Use a suction filtration device to separate the cooked mixture through a filter paper with a porosity of 10-15 μm, and collect the filtrate;

[0037] (4) Adding deionized water to dilute the filtrate to a concentration of 10%, stirring, and standing for precipitation to obtain a yellow bamboo nano-lignin solution;

[0038] (5) Exchange and rinse the yellow lignin solution obtained in step (4) with deionized water for 5 times, and change the water every 6 hours until the pH of the solution is 6.5 to obtain a light-colored lignin solution; ...

Embodiment 2

[0041] A kind of bamboo nano lignin sunscreen, its preparation method comprises the steps:

[0042] (1) Process the bamboo into 30×5×5mm bamboo slices, wash them with distilled water until there is no sediment, and then air-dry them at room temperature;

[0043] (2) Prepare a p-toluenesulfonic acid solution with a concentration of 75%, put the bamboo slices in the p-toluenesulfonic acid solution and cook at 90°C for 70 minutes;

[0044] (3) Use a suction filtration device to separate the cooked mixture through a filter paper with a porosity of 10-15 μm, and collect the filtrate;

[0045] (4) Adding deionized water to dilute the filtrate to a concentration of 10%, stirring, and standing for precipitation to obtain a yellow bamboo nano-lignin solution;

[0046] (5) Exchange and rinse the yellow lignin solution obtained in step (4) with deionized water for 5 times, and change the water every 6 hours until the pH of the solution is 6.5 to obtain a light-colored lignin solution; ...

Embodiment 3

[0049] A kind of bamboo nano lignin sunscreen, its preparation method comprises the steps:

[0050] (1) Process the bamboo into 30×5×1mm bamboo slices, wash them with distilled water until there is no sediment, and then air-dry them at room temperature;

[0051] (2) Prepare a p-toluenesulfonic acid solution with a concentration of 60%, put the bamboo slices in the p-toluenesulfonic acid solution and cook at 90°C for 60 minutes;

[0052] (3) Use a suction filtration device to separate the cooked mixture through a filter paper with a porosity of 10-15 μm, and collect the filtrate;

[0053] (4) Adding deionized water to dilute the filtrate to a concentration of 10%, stirring, and standing for precipitation to obtain a yellow bamboo nano-lignin solution;

[0054] (5) Exchange and rinse the yellow lignin solution obtained in step (4) with deionized water for 10 times, and change the water every 2 hours until the pH of the solution is 7.0 to obtain a light-colored lignin solution; ...

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PUM

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Abstract

The invention discloses a preparation method of a green and environment-friendly bamboo nano lignin sun-screening agent. The preparation method comprises the following steps: primarily processing bamboos, cooking the bamboos in a p-toluenesulfonic acid solution, and carrying out suction filtration and separation to obtain a filtrate; diluting and centrifuging the filtrate to obtain a bamboo nano lignin solution; and finally, exchanging the obtained bamboo nano lignin solution with deionized water until the solution is nearly neutral, and carrying out air drying at room temperature to obtain the bamboo nano lignin sun-screening agent. And the bamboo nano lignin is added into emulsion and varnish to prepare the bamboo nano lignin sunscreen emulsion and varnish. The prepared bamboo nano lignin sunscreen emulsion and varnish are directly smeared on the surface of a leather material with the sunscreen requirement, and the purposes of ultraviolet resistance and sunscreen are achieved. The preparation method is simple in preparation process and easy to operate; the product can be prepared under the energy-saving and environment-friendly conditions, has a sunscreen effect, and has good development potential and application prospect.

Description

technical field [0001] The invention belongs to the technical field of biomass reuse, and in particular relates to a preparation method and application of a bamboo nano lignin sunscreen. Background technique [0002] Bamboo has unique biological characteristics, grows rapidly, and has strong renewable capacity. It is a sustainable green resource. my country is the country with the most abundant bamboo resources in the world, and bamboo has become a widely used wood fiber raw material. Lignin is the second most abundant natural organic polymer compound after cellulose in storage on the earth, and it is widely present in lignocellulosic raw materials such as bamboo. However, due to the complex structure of lignin, lignin obtained from different types of raw materials or methods has great structural differences, which largely hinders the large-scale application of lignin-based materials. [0003] At the same time, with the tight supply of petrochemical raw materials and the r...

Claims

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Application Information

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IPC IPC(8): C08H7/00C09D201/00C09D197/00C09D7/65A61K8/72A61K8/06A61Q17/04
CPCC08H6/00C09D201/00C09D7/65A61K8/72A61K8/06A61Q17/04
Inventor 马千里王坤李世杰江泽慧刘杏娥尚莉莉杨淑敏田根林马建锋
Owner INT CENT FOR BAMBOO & RATTAN