Cyanobacteria-based biological composite film material with functions of water resistance and light blocking, and preparation method thereof

A composite film, cyanobacteria-based technology, applied in the field of materials science, can solve the problems of wasting cyanobacterial nutrients, low lactic acid conversion rate, difficult disposal of waste residues, etc., and achieves high utilization rate of cyanobacteria, water resistance and light blocking properties. Effect

Active Publication Date: 2020-01-17
JIANGSU PROVINCIAL ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has problems such as the difficulty in handling the waste residue after the fermentation of cyanobacteria and the low conversion rate of lactic acid.
[0006] (2) Cultivate and extract phycocyanin to pro

Method used

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  • Cyanobacteria-based biological composite film material with functions of water resistance and light blocking, and preparation method thereof
  • Cyanobacteria-based biological composite film material with functions of water resistance and light blocking, and preparation method thereof
  • Cyanobacteria-based biological composite film material with functions of water resistance and light blocking, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0047] Example 1:

[0048] 1. Prepare the mixed solution

[0049] 1 g of polyethylene glycol, 0.75 g of guanidine hydrochloride and 0.5 g of carboxymethyl cellulose are mixed with 47.75 g of water to make a homogenate, which is stirred evenly and reacted for 2 hours under normal temperature conditions to obtain a mixed solution.

[0050] 2. Preparation of polyvinyl alcohol / nanocellulose mixture

[0051] (1) Weigh 8g of polyvinyl alcohol and mix with 72g of water, swell at room temperature and then heat (55°C) for 2 hours to dissolve to obtain a polyvinyl alcohol solution with a concentration of 10%.

[0052] (2) Weigh 40g of the nanocellulose solution with a concentration of 1%, mix with the polyvinyl alcohol solution and stir for 1 hour to obtain a polyvinyl alcohol / nanocellulose mixture.

[0053] 3. Preparation of polyvinyl alcohol / nanocellulose composite film

[0054] Mix 20 g of the above polyvinyl alcohol / nanocellulose solution with 1 g of the mixed solution, add 0.5 g of coupling ag...

Example Embodiment

[0055] Example 2:

[0056] 1. Prepare the cyanobacteria mixture

[0057] Weigh 1g of cyanobacterial powder and mix 46.75g of water to make a homogenate. Add 1g polyethylene glycol, 0.75g guanidine hydrochloride and 0.5g carboxymethylcellulose to the homogenate, stir well, and react at room temperature. 2 Hours, get the cyanobacteria mixture.

[0058] 2. Preparation of polyvinyl alcohol / nanocellulose mixture

[0059] (1) Weigh 8g of polyvinyl alcohol and mix with 72g of water, swell at room temperature and then heat (55°C) for 2 hours to dissolve to obtain a polyvinyl alcohol solution with a concentration of 10%.

[0060] (2) Weigh 40g of the nanocellulose solution with a concentration of 1%, mix with the polyvinyl alcohol solution and stir for 1 hour to obtain a polyvinyl alcohol / nanocellulose mixture.

[0061] 3. Preparation of cyanobacteria / polyvinyl alcohol / nanocellulose composite film

[0062] Mix 20g of the above polyvinyl alcohol / nanocellulose solution with 1g of cyanobacteria mixt...

Example Embodiment

[0064] Example 3:

[0065] 1. Prepare the cyanobacteria mixture

[0066] Weigh 1g of cyanobacterial powder and mix 46.75g of water to make a homogenate. Add 1g polyethylene glycol, 0.75g guanidine hydrochloride and 0.5g carboxymethylcellulose to the homogenate, stir well, and react at room temperature. 2 Hours, get the cyanobacteria mixture.

[0067] 2. Preparation of polyvinyl alcohol / nanocellulose mixture

[0068] (1) Weigh 8g of polyvinyl alcohol and mix with 72g of water, swell at room temperature and then heat (55°C) for 2 hours to dissolve to obtain a polyvinyl alcohol solution with a concentration of 10%.

[0069] (2) Weigh 40g of the nanocellulose solution with a concentration of 1%, mix with the polyvinyl alcohol solution and stir for 1 hour to obtain a polyvinyl alcohol / nanocellulose mixture.

[0070] 3. Preparation of cyanobacteria / polyvinyl alcohol / nanocellulose composite film

[0071] Mix 20g of the above polyvinyl alcohol / nanocellulose solution with 3g of cyanobacteria mixt...

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Abstract

The invention discloses a cyanobacteria-based biological composite film material with functions of water resistance and light blocking, and a preparation method thereof, and belongs to the field of material science. The preparation method comprises: mixing cyanobacteria powder with a water content of not more than 10%, water, carboxymethyl cellulose, a solubilizer and a modifier to prepare a cyanobacteria mixture; mixing a nanocellulose solution and a polyvinyl alcohol solution to obtain a polyvinyl alcohol/nanocellulose mixed solution; and finally uniformly mixing the cyanobacteria mixture, the polyvinyl alcohol/nanocellulose mixed solution and a coupling agent, reacting at 55 DEG C for 2 h to obtain a film-forming solution, pouring into a culture dish, and drying to obtain the water-resistant light-blocking cyanobacteria-based biological composite film material. Compared with the polyvinyl alcohol film, the cyanobacteria-based biological composite film material of the invention has the significantly improved water resistance and the significantly improved light blocking property, can be used as a packaging material, has characteristics of simple process and low cost, effectivelyutilizes the cyanobacteria fished from lake water, and solves the environmental problem.

Description

technical field [0001] The invention relates to a cyanobacteria-based biocomposite film material with water-resistant and light-blocking functions and a preparation method thereof, belonging to the field of materials science. Background technique [0002] Plastic packaging films are widely used. Petroleum or natural gas is used as raw materials, which are refined and cracked into various basic petrochemical raw materials, and then polymerized. However, plastic packaging films are not easy to decompose and can cause serious "white pollution". Burning is prone to produce toxic and harmful gases and odors, so the research and development of degradable film materials in the industry has been going on. Polyvinyl alcohol film is a green and environmentally friendly functional material with polyvinyl alcohol as the main body, adding additives such as modifiers, and processing through a special process, which can be completely degraded by microorganisms in the soil. It can be degra...

Claims

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Application Information

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IPC IPC(8): C08L29/04C08L1/02C08L71/02C08L5/04C08L89/00C08L1/28C08K5/5435C08K5/10C08K5/5425C08J5/18B65D65/38
CPCC08J5/18B65D65/38C08J2329/04C08J2401/02C08J2405/04C08J2489/00C08K5/5435C08K5/10C08K5/5425
Inventor 陈赛楠徐长妍徐丽周海云包健王希刘滴钱敏高诗雨徐楠
Owner JIANGSU PROVINCIAL ACAD OF ENVIRONMENTAL SCI
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