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Deproteinized rubber and preparation method thereof
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A deproteinized and rubberized technology, applied in the field of deproteinized rubber and its preparation, can solve the problems of poor toughness, good electrical conductivity and poor electrical conductivity.
Active Publication Date: 2022-02-15
河南崤函生物科技有限公司
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[0002] Rubber is generally divided into synthetic rubber and natural rubber. Synthetic rubber has poor toughness, but good electrical conductivity, while natural rubber has poor electrical conductivity. Part of the reason is that natural rubber contains vegetable protein and synthetic rubber does not contain vegetable protein. In order to improve natural rubber Conductive properties, need to remove the protein in natural rubber
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preparation example Construction
[0019] The embodiment of the present application provides a method for preparing deproteinized rubber, which includes: mixing the natural rubber centrifugal supernatant glue and enzyme preparation, and reacting at 40-55°C to obtain the deproteinized rubber glue, wherein the reaction system The pH value of the mixture is 8-9, the enzyme preparation includes alkaline protease with an activity of 200,000-500,000 U / g, and the ratio of the enzyme preparation to the natural rubber centrifugal supernatant glue is 0.05-0.2g:100mL.
[0020] Exemplarily, the ratio of enzyme preparation and natural rubber centrifuge liquid glue is 0.05g: 100mL, 0.08g: 100mL, 0.10g: 100mL, 0.12g: 100mL, 0.15g: 100mL, 0.18g: 100mL and 0.20g: 100mL Either of or any range in between.
[0021] It should be noted that the enzyme preparations in the examples of the present application can either be alkaline protease alone, or contain alkaline protease and other proteases. Wherein, the activity of the alkaline ...
Embodiment 1
[0041] The present embodiment provides a kind of preparation method of deproteinized rubber, comprises the following steps:
[0042] Put 100mL of natural rubber centrifuge supernatant glue in a 250mL beaker, add 0.1g of alkaline protease with an activity of 200,000 U / g into the beaker, then put the beaker into a constant temperature water bath at 40°C, and heat at 100r / min Stir for 2.5 hours at a high speed to obtain a deproteinized rubber solution. Wherein, the pH value of the reaction system is 8.84.
Embodiment 2
[0044] The present embodiment provides a kind of preparation method of deproteinized rubber, comprises the following steps:
[0045] Put 100mL of natural rubber centrifuge supernatant glue in a 250mL beaker, add 0.1g of alkaline protease with an activity of 500,000 U / g into the beaker, then put the beaker into a constant temperature water bath at 40°C, and set the temperature at 100r / min Stir for 2.5 hours at a high speed to obtain a deproteinized rubber solution. Wherein, the pH value of the reaction system is 8.90.
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Abstract
A deproteinized rubber and a preparation method thereof belong to the technical field of natural rubber deproteinized. The preparation method of the deproteinized rubber comprises: mixing the natural rubber centrifugal supernatant liquid and an enzyme preparation, and reacting at 40-55° C. to obtain the deproteinized rubber liquid, wherein the pH value of the reaction system is 8-9, The enzyme preparation includes alkaline protease with an activity of 200,000-500,000 U / g, and the ratio of the enzyme preparation to the natural rubber centrifuge liquid glue is 0.05-0.2g:100mL. The method can effectively remove vegetable protein in natural rubber. Use H 2 SO 4 The solution adjusts the pH of the deproteinized rubber solution to 2.5-5 so that the rubber is precipitated, and the second acid protease is added to the residual solution to react under the condition of 35-45°C. It can eliminate the substances with antibacterial ability produced by alkaline protease in the process of decomposing plant protein, so that protease can be used normally in the process of improving the quality of rubber.
Description
technical field [0001] The present application relates to the technical field of deproteinization of natural rubber, in particular to a deproteinization rubber and a preparation method thereof. Background technique [0002] Rubber is generally divided into synthetic rubber and natural rubber. Synthetic rubber has poor toughness, but good electrical conductivity, while natural rubber has poor electrical conductivity. Part of the reason is that natural rubber contains vegetable protein and synthetic rubber does not contain vegetable protein. In order to improve natural rubber To improve the electrical conductivity, the protein in natural rubber needs to be removed. Contents of the invention [0003] The application provides a deproteinized rubber and a preparation method thereof, which can effectively remove vegetable protein in natural rubber. [0004] The embodiment of the application is realized like this: [0005] In the first aspect, the embodiment of the present appl...
Claims
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Application Information
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