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A kind of pineapple skin carboxymethyl cellulose/polyvinyl alcohol/mesoporous silica composite hydrogel and its preparation method and application

A carboxymethyl cellulose, mesoporous silica technology, applied in biochemical equipment and methods, immobilized on/in organic carriers, enzymes, etc., can solve resource waste, environmental and ecosystem risk pollution, etc. problems, to achieve the effect of low equipment requirements, improved biocompatibility, and low price

Inactive Publication Date: 2019-05-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pineapple is mostly edible pulp and its pulp is also used as a supplement in food desserts, salads, fruit cocktails, jams, juice combinations or in the food processing industry, however, its mass cultivation and food manufacturing industry deteriorates due to the large amount of peeling waste , which not only causes a waste of resources, but also has potential risk pollution to the environment and ecosystem. Therefore, how to turn waste into treasure, process and utilize pineapple peel residue, and promote the efficient development of the pineapple industry and environmental protection are of great significance

Method used

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  • A kind of pineapple skin carboxymethyl cellulose/polyvinyl alcohol/mesoporous silica composite hydrogel and its preparation method and application
  • A kind of pineapple skin carboxymethyl cellulose/polyvinyl alcohol/mesoporous silica composite hydrogel and its preparation method and application
  • A kind of pineapple skin carboxymethyl cellulose/polyvinyl alcohol/mesoporous silica composite hydrogel and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0035] (1) Wash 2 kg of fresh pineapple peel, cut into pieces and beat, filter, dry at 50°C for 20 hours, and sieve under 80 mesh after pulverization to obtain pineapple peel powder;

[0036] (2) Mix pineapple peel residue powder with distilled water at a solid-liquid ratio of 1:20g / mL, heat in a water bath at 70°C for 2 hours, and collect the filter residue after filtration for bleaching treatment. The bleaching treatment uses sodium chlorite solution with a mass fraction of 7% as the bleaching agent, the solid-liquid ratio is 1:15g / mL, the pH value of the solution is adjusted to 3.8 with 4mol / L hydrochloric acid solution, and the bleaching treatment is performed at 70°C for 2 hours;

[0037] (3) Collect the insoluble matter after the bleaching treatment by filtration, wash with distilled water to neutrality and then wash 3 times with an ethanol solution with a volume fraction of 95%, air-dry at room temperature for 2 hours, and dry at 50°C for 16 hours to obtain the crude pin...

Embodiment 2

[0043] (1) Wash 2 kg of fresh pineapple peel, cut into pieces and beat, filter, dry at 55° C. for 24 hours, and sieve under 80 mesh after pulverization to obtain pineapple peel powder;

[0044] (2) Mix pineapple peel residue powder with distilled water at a solid-liquid ratio of 1:25g / mL, heat in a water bath at 80°C for 3 hours, and collect the filter residue after filtration for bleaching treatment. The bleaching treatment uses sodium chlorite solution with a mass fraction of 8% as the bleaching agent, the solid-liquid ratio is 1:20g / mL, the pH value of the solution is adjusted to 4.0 with 4mol / L hydrochloric acid solution, and the bleaching treatment is performed at 70°C for 4 hours;

[0045] (3) Collect the insoluble matter after bleaching by filtration, wash with distilled water to neutrality and then wash 5 times with ethanol solution with a volume fraction of 95%, air-dry at room temperature for 2 hours, and dry at 55°C for 24 hours to obtain the crude pineapple pomace c...

Embodiment 3

[0051] (1) Wash 2 kg of fresh pineapple peel, cut into pieces and beat, filter, dry at 50°C for 22 hours, and sieve under 80 meshes after pulverization to obtain pineapple peel powder;

[0052] (2) Mix pineapple peel residue powder with distilled water at a solid-liquid ratio of 1:22g / mL, heat in a water bath at 70°C for 2 hours, and collect the filter residue after filtration for bleaching treatment. The bleaching treatment uses sodium chlorite solution with a mass fraction of 7.5% as the bleaching agent, the solid-liquid ratio is 1:17g / mL, the pH value of the solution is adjusted to 3.9 with 4mol / L hydrochloric acid solution, and the bleaching treatment is performed at 70°C for 3 hours;

[0053] (3) Collect the insoluble matter after the bleaching treatment by filtration, wash with distilled water to neutrality, and then wash with ethanol solution with a volume fraction of 95% for 4 times, air-dry at room temperature for 2 hours, and dry at 52° C. for 22 hours to obtain the c...

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Abstract

The invention discloses a pineapple peel residue carboxymethyl cellulose / polyvinyl alcohol / mesoporous silica composite hydrogel and a preparation method and an application thereof. A pineapple peel residue as a raw material is subjected to cleaning, drying, crushing, bleaching and alkali liquor treatment to obtain pineapple peel residue cellulose, then the pineapple peel residue cellulose is activated and is subjected to gradient etherification treatment, filtration, washing and drying to obtain pineapple peel residue carboxymethyl cellulose; then the pineapple peel residue carboxymethyl cellulose, SBA-15 and polyvinyl alcohol are dissolved in water to form a uniform solution, and the solution is subjected to freezing-thawing circulation and is dried to obtain the composite hydrogel; and the composite hydrogel as a carrier is immobilized with papain. The used raw material pineapple peel residue has the advantages of rich sources, convenient and easy obtaining, and good economic performance. The process for preparing the hydrogel after the pineapple peel residue cellulose is modified is simple, the reaction time is short, polyvinyl alcohol and SBA-15 can improve the structure stability and hydrophilicity of the hydrogel, and the hydrogel has good application prospects in the fields of biological medicines and adsorption materials.

Description

technical field [0001] The invention belongs to the technical field of composite hydrogel, and in particular relates to a pineapple pomace carboxymethyl cellulose / polyvinyl alcohol / mesoporous silica SBA-15 composite hydrogel and its preparation method and application. Background technique [0002] Pineapple is the third fruit in the world after bananas and citrus. Because of its unique flavor, it is deeply loved by everyone. Pineapple is a tropical fruit that mainly grows in China, Brazil, Thailand and the Philippines. Pineapple is mostly edible pulp and its pulp is also used as a supplement in food desserts, salads, fruit cocktails, jams, juice combinations or in the food processing industry, however, its mass cultivation and food manufacturing industry deteriorates due to the large amount of peeling waste , This not only causes a waste of resources, but also has potential risk pollution to the environment and ecosystem. Therefore, how to turn waste into treasure, process a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/075C08L29/04C08L1/28C08K7/26C08K3/36C12N11/14C12N11/12C12N11/08C12N9/50
CPCC08J3/075C08J2329/04C08J2401/28C08L29/04C12N9/63C12N11/08C12N11/12C12N11/14C12Y304/22002C08L1/286C08K7/26C08K3/36
Inventor 黄惠华罗苏芹戴宏杰
Owner SOUTH CHINA UNIV OF TECH
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