Preparation method of nano-silver-based collagenous fiber aerogel material capable of efficiently capturing iodine vapor

A collagen fiber and iodine vapor technology, which is applied in the field of efficiently capturing iodine vapor nano-silver-based collagen fiber aerogel material, can solve the problems of insufficient persistent iodine adsorption, high practical application cost, complicated preparation process, etc. The effect of low cost, low cost and simple preparation process

Pending Publication Date: 2020-12-04
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main adsorption materials for radioactive gaseous iodine are zeolite and activated carbon, but the factors such as difficult treatment, low recycling rate and high practical application cost limit their wide application.
In recent years, adsorption materials such as COFS, MOFS, POPs, CMPs and airgel have performed well, with large specific surface area and rich microporous structure, and have strong adsorption effect on gaseous iodine, but due to the complicated preparation process and high preparation cost , low stability, inconvenient post-processing and poor adsorption environment lead to insufficient long-term adsorption of iodine by the material, which limits the practical application.

Method used

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  • Preparation method of nano-silver-based collagenous fiber aerogel material capable of efficiently capturing iodine vapor
  • Preparation method of nano-silver-based collagenous fiber aerogel material capable of efficiently capturing iodine vapor
  • Preparation method of nano-silver-based collagenous fiber aerogel material capable of efficiently capturing iodine vapor

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Experimental program
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Effect test

Embodiment 1

[0039] A preparation method for efficiently capturing iodine vapor nano-silver-based collagen fiber airgel material is characterized in that it comprises the following steps:

[0040] Step 1. After cleaning, alkali treatment, dehydration and other treatments according to the conventional method, the untanned animal skin is pulverized by a pulverizer to obtain granular collagen fibers with a particle size of 20 mesh, added to deionized water, and ultrasonically cleaned in an ultrasonic cleaning machine. Wash for 5 hours until neutral, filter and dry in an oven; ultrasonic cleaning temperature and vacuum drying oven temperature are controlled at 50°C; ultrasonic frequency 40kHz, power 800W;

[0041] Step 2: Grind the cleaned 5 g of collagen fibers into 40 meshes in a pulverizer, add 500 mL of deionized water, and add sodium hydroxide to adjust the pH of the solution to 9; after ultrasonication for 2 hours, wash with deionized water until neutral, filter and place in Dry in a vac...

Embodiment 2

[0046] A preparation method for efficiently capturing iodine vapor nano-silver-based collagen fiber airgel material is characterized in that it comprises the following steps:

[0047] Step 1. After cleaning, alkali treatment, dehydration and other treatments according to the conventional method, the untanned animal skin is crushed by a pulverizer to obtain granular collagen fibers with a particle size of 40 mesh, added to deionized water, and ultrasonically cleaned in an ultrasonic cleaner. Wash for 5 hours until neutral, filter and dry in an oven; ultrasonic cleaning temperature and vacuum drying oven temperature are controlled at 50°C; ultrasonic frequency 40kHz, power 800W;

[0048] Step 2: Grind 5 g of collagen fibers after washing and drying into 40 meshes in a pulverizer, add 500 mL of deionized water, and add sodium hydroxide to adjust the pH of the solution to 9; after ultrasonication for 2 hours, wash with deionized water until neutral, and filter Dry in a vacuum oven...

Embodiment 3

[0053] A preparation method for efficiently capturing iodine vapor nano-silver-based collagen fiber airgel material is characterized in that it comprises the following steps:

[0054] Step 1. After cleaning, alkali treatment, dehydration and other treatments according to the conventional method, the untanned animal skin is crushed by a pulverizer to obtain granular collagen fibers with a particle size of 50 mesh, added to deionized water, and ultrasonically cleaned in an ultrasonic cleaning machine. Wash for 5 hours until neutral, filter and dry in an oven; ultrasonic cleaning temperature and vacuum drying oven temperature are controlled at 50°C; ultrasonic frequency 40kHz, power 800W;

[0055] Step 2: Grind the cleaned 5 g of collagen fibers into 70 meshes in a pulverizer, add 500 mL of deionized water, and add sodium hydroxide to adjust the pH of the solution to 9; after ultrasonication for 2 hours, wash with deionized water until neutral, filter and place in Dry in a vacuum...

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Abstract

The invention discloses a preparation method of a nano-silver-based collagenous fiber aerogel material capable of efficiently capturing iodine vapor, wherein the preparation method comprises the steps: cleaning collagenous fibers, drying, pulverizing, adding into water, soaking, and adding alkali to regulate the pH value of the solution; after ultrasonic treatment, cleaning, filtering and drying,uniformly mixing the dried material with polyvinyl alcohol, placing in a tubular furnace and calcining; washing the calcined product to be neutral, dissolving in water, and ultrasonically mixing uniformly; pre-freezing the product after ultrasonic uniform mixing, freeze-drying, soaking and swelling the freeze-dried product in a silver-ammonia solution, and performing ultrasonic treatment; and pre-freezing the material subjected to ultrasonic treatment again, freeze-drying, soaking the freeze-dried product in a NaOH solution, washing the product obtained by filtering after soaking, quick-freezing the product in liquid nitrogen, and freeze-drying to obtain the nano-silver-based collagenous fiber aerogel material capable of efficiently capturing iodine vapor. The method is simple in preparation process, low in cost and environmentally friendly, and secondary pollution to the environment in the preparation process is avoided.

Description

technical field [0001] The invention belongs to the field of environmental protection in which biomass waste resources are used for adsorption of radioactive iodine vapor in the environment, and specifically relates to a preparation method of a nano-silver-based collagen fiber airgel material for efficiently capturing iodine vapor. Background technique [0002] With the rise of the tanning industry, the leather market demand is greater, but the utilization rate of the raw material animal skin in the tanning process is not high, resulting in a large amount of waste of leather raw materials, especially the waste with small particle size is difficult to reuse, and at the same time It also causes serious pollution to the environment. How to realize the reuse of leather waste resources has always been a hot issue for researchers. Studies have shown that leather waste can be transformed into collagen fibers with strong hydrophilicity after cleaning, alkali treatment, dehydration ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J13/00B01D53/02B82Y30/00B82Y40/00G21F9/02B01J20/30
CPCB01J20/24B01J20/28047B01J13/0091B01D53/02G21F9/02B82Y30/00B82Y40/00
Inventor 周建王波朱辉
Owner SOUTHWEAT UNIV OF SCI & TECH
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