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Preparation method for pH intelligent response membrane with nano-crystalline cellulose for enhancing tara gum substrate

A technology of nanocellulose and tara gum is applied in the field of preparation of pH intelligent responsive membrane, which can solve the problems of high cost and complicated preparation process, and achieve the effect of improving flexibility and good antioxidant activity.

Active Publication Date: 2015-10-21
NORTHEAST FORESTRY UNIVERSITY
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the technical problems of complex preparation process and high cost of the existing pH responsive materials, and provides a preparation method of a nanocellulose-reinforced Tara gum matrix pH intelligent responsive membrane

Method used

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  • Preparation method for pH intelligent response membrane with nano-crystalline cellulose for enhancing tara gum substrate
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  • Preparation method for pH intelligent response membrane with nano-crystalline cellulose for enhancing tara gum substrate

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specific Embodiment approach 1

[0018] Specific embodiment one: The preparation method of the nanocellulose reinforced tara gum matrix pH intelligent response membrane of the present embodiment is carried out according to the following steps:

[0019] 1. Add microcrystalline cellulose (MCC) and concentrated sulfuric acid solution into a container and heat to 45-55°C, react for 1.5-3 hours to obtain a cellulose suspension; wherein the mass concentration of the concentrated sulfuric acid solution is 50%-60%;

[0020] 2. After washing the cellulose suspension with water, centrifuge to separate the colloidal substance at the bottom of the centrifuge tube, then place it in a dialysis bag with a molecular weight cut-off of 6000-8000, use deionized water as the dialysate, and dialyze until the colloid The pH value is neutral, and then treated with an ultrasonic cell pulverizer for 15 to 30 minutes, and dried to obtain nanocellulose (NCC);

[0021] 3. Wash and dry the grape skins and crush them. According to the mas...

specific Embodiment approach 2

[0024] Embodiment 2: This embodiment differs from Embodiment 1 in that the heating temperature in step 1 is 51° C., and the reaction time is 2.5 hours. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0025] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the mass concentration of the concentrated sulfuric acid solution in step one is 56%. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a preparation method for a pH intelligent response membrane, in particular to a preparation method for a pH intelligent response membrane with nano-crystalline cellulose for enhancing a tara gum substrate. The technical problems that an existing pH response material preparation technology is complex and high in cost are solved. The method comprises the steps that microcrystalline cellulose is processed through concentrated sulfuric acid to obtain nano-crystalline cellulose; a grape skin extract is prepared, glycerinum, the nano-crystalline cellulose and the grape skin extract are added into a tara gum solution for even stirring, and then a membrane formation solution is obtained; membrane casting and drying are performed to obtain the pH intelligent response membrane with the nano-crystalline cellulose for enhancing the tara gum substrate. The membrane can change color in the acid-base environment and can be used for manufacturing packaging materials.

Description

technical field [0001] The invention relates to a preparation method of a pH intelligent response membrane. Background technique [0002] In recent years, people have put forward new requirements for food packaging. They hope that the packaging materials will become safer and reduce the amount of additives. For example, the Chinese patent with the application number 201310370689.2 discloses a pH-responsive biodegradable polymer vesicle, which is a tri-block of polyethylene glycol monomethyl ether, poly(ε-caprolactone) and polyglutamic acid. Segment polymers are mainly used for drug loading, which realize pH response and drug loading by adding various initiators, and the preparation process is complicated and the cost is high. Contents of the invention [0003] The present invention aims to solve the technical problems of complicated preparation process and high cost of the existing pH responsive materials, and provides a preparation method of a nanocellulose-reinforced Ta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L5/00C08L1/02C08K5/053C08K5/00
Inventor 王立娟马倩云杨金杯
Owner NORTHEAST FORESTRY UNIVERSITY
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