Titanium dioxide/lignin-based composite nanoparticle, and preparation method and application thereof

A composite nanoparticle and lignin-based technology, which is applied in the field of titanium dioxide/lignin-based composite nanoparticles and its preparation, can solve the problems of lignin such as easy agglomeration, difficult dispersion, and poor weather resistance, and achieve uniform particle size and compatibility Strong, good dispersion effect

Active Publication Date: 2017-05-10
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to overcome the above-mentioned deficiencies in the prior art that titanium dioxide nanoparticles are difficult to disperse in the polymer matrix, poor weather ...

Method used

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  • Titanium dioxide/lignin-based composite nanoparticle, and preparation method and application thereof
  • Titanium dioxide/lignin-based composite nanoparticle, and preparation method and application thereof
  • Titanium dioxide/lignin-based composite nanoparticle, and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0042] Take 100 parts by weight of wood pulp alkali lignin solid and dissolve it in water, prepare a suspension with a concentration of 20% by weight, adjust the pH value to 9 with NaOH with a mass concentration of 20%, heat to 50°C, and add 50 parts of 3- Chloro-2-hydroxypropyltrimethylammonium chloride, reacted at 50°C for 2 hours, and dried to obtain quaternized lignin.

[0043] Take the above quaternized lignin, add water and dilute to a solution with a weight percent of 10%, and then add hydrochloric acid with a mass concentration of 30% to adjust the pH to 3. In addition, 300 parts by weight of sodium dodecylbenzenesulfonate was dissolved in water to prepare a solution with a concentration of 10% by weight, and then sulfuric acid with a mass concentration of 20% was added to adjust the pH value to 3. The prepared quaternized lignin solution and sodium dodecylbenzenesulfonate solution are mixed, and after co-precipitation, aging and drying, the quaternized lignin / sodium d...

Embodiment 2

[0046] Take 100 parts by weight of bagasse acid-analyzed lignin solid and dissolve it in water, prepare a suspension with a concentration of 50% by weight, adjust the pH value to 9 with NaOH with a mass concentration of 20%, heat to 85°C, add 30 parts by weight of 3 -Chloro-2-hydroxypropyltrimethylammonium chloride, react at 85°C for 1 hour, and obtain quaternized lignin after drying.

[0047] The above quaternized lignin was taken, diluted with water to a solution of 10% by weight, and then added sulfuric acid with a mass concentration of 20% to adjust the pH to 1. In addition, 30 parts by weight of sodium lauryl sulfate was dissolved in water to prepare a solution with a concentration of 10% by weight, and then sulfuric acid with a mass concentration of 20% was added to adjust the pH value to 1. The prepared quaternized lignin solution and sodium dodecylbenzenesulfonate solution are mixed, and after co-precipitation, aging and drying, the quaternized lignin / sodium dodecylben...

Embodiment 3

[0050] Take 50 parts by weight of reed alkali lignin and 50 parts by weight of bamboo pulp alkali lignin solid and dissolve them in water, prepare a suspension with a concentration of 40% by weight, adjust the pH value to 11 with NaOH with a mass concentration of 20%, and heat to At 70°C, add 80 parts by weight of 2,3-epoxypropyltrimethylammonium chloride, react at 70°C for 4 hours, and obtain quaternized lignin after drying.

[0051] Take the above quaternized lignin, add water and dilute to a solution with a weight percentage of 10%, and then add phosphoric acid with a mass concentration of 10% to adjust the pH to 7. In addition, 360 parts by weight of sodium dodecylbenzenesulfonate was dissolved in water to prepare a solution with a concentration of 10% by weight, and then sulfuric acid with a mass concentration of 20% was added to adjust the pH value to 7. The prepared quaternized lignin solution and sodium dodecylbenzenesulfonate solution are mixed, and after co-precipita...

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Abstract

The invention discloses a titanium dioxide/lignin-based composite nanoparticle, and a preparation method and application thereof, belonging to the technical field of composite nanoparticles. The method provided by the invention comprises the following steps: adding a quaternization reagent into an alkaline alkali lignin solution for a reaction so as to obtain quaternized lignin; subjecting the quaternized lignin to acid regulation, adding an anionic surfactant so as to obtain a quaternized lignin/anionic surfactant compound, and adding the compound into an ethanol suspension of nanometer titanium dioxide so as to obtain a mixed solution of titanium dioxide/lignin-based compound; and adding water with a pH value of 1 to 7 into the mixed solution and carrying out ageing so as to obtain titanium dioxide/lignin-based composite nanoparticle. The composite nanoparticle is low in cost, uniform in particle size, good in dispersibility and strong in compatibility with organic mediums; when applied to skin care products and anti-UV materials, the composite nanoparticle can substantially improve anti-UV capability; and titanium dioxide wrapped by the lignin-based compound can effectively shield the photocatalytic activity of the composite nanoparticle and improve the photostability of the composite nanoparticle.

Description

technical field [0001] The invention belongs to the technical field of composite nanoparticles, and in particular relates to a titanium dioxide / lignin-based composite nanoparticle, a preparation method and an application thereof. Background technique [0002] In recent years, the damage to the ozone layer caused by the random discharge of freon gas has become a global environmental problem. There is a theory that: a 10% reduction in the ozone layer will increase the ultraviolet B waves reaching the earth by 20%. As people pay more and more attention to the danger of excessive ultraviolet radiation, sunscreen and skin care products are important varieties for the development of skin care products now and in the future. Titanium dioxide is a representative of inorganic sunscreens. It has good ultraviolet absorption and scattering capabilities. Compared with organic sunscreens, it is less irritating and has better stability. It is widely used in sunscreens. However, the parti...

Claims

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Application Information

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IPC IPC(8): C08L97/00C08K3/22C08K5/42C08K5/41C08H7/00A61K8/29A61K8/72A61K8/02A61Q17/04A61Q19/00
CPCA61K8/0245A61K8/29A61K8/72A61K2800/413A61Q17/04A61Q19/00C08H6/00C08K3/22C08K5/41C08K5/42C08K2201/011C08L97/005
Inventor 杨东杰李圆圆邱学青钱勇楼宏铭黄锦浩庞煜霞
Owner SOUTH CHINA UNIV OF TECH
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