Cellulose chemical crosslinking based gelatin film and preparation method thereof

A technology of chemical cross-linking and cellulose is applied in the field of gelatin film based on chemical cross-linking of cellulose and its preparation to achieve the effects of improving light-blocking performance, light-blocking performance and hydrophobicity

Inactive Publication Date: 2015-08-26
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, there are very few studies on the use of fiber-based active esters to modify gelatin films. There is still a lack of patent research on functi

Method used

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  • Cellulose chemical crosslinking based gelatin film and preparation method thereof
  • Cellulose chemical crosslinking based gelatin film and preparation method thereof
  • Cellulose chemical crosslinking based gelatin film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] A kind of synthetic method of novel macromolecular cross-linking agent based on cellulose:

[0060] (1) Synthesis of EDTA dianhydride (EDTAD):

[0061] Dissolve 20g of EDTA disodium salt in 100ml of water to form a transparent solution, add 1.5 mol / L HCl dropwise during stirring until a white precipitate appears, and filter to obtain EDTA; weigh 18g of EDTA and 24ml of acetic anhydride in 31 ml of pyridine to form a suspension, and magnetically stirred in an oil bath at 65 °C for 24 h. After the reaction was completed, it was washed with distilled water and ether, then suction filtered, and vacuum-dried at 50 °C to obtain white powdery solid EDTA dianhydride (EDTAD).

[0062] (2) Preparation of EDTAD functionalized microcrystalline cellulose (ME):

[0063] Weigh 3 g of microcrystalline cellulose (MCC) and 9 g of EDTAD in 150 ml DMF, and stir magnetically in an oil bath at 70 °C for 24 h. ml of distilled water and 20 ml of ethanol were washed, then suction-filtered, an...

Embodiment 2

[0117] (1) Synthesis of EDTA dianhydride (EDTAD):

[0118] Weigh 30g of EDTA disodium salt and dissolve it in 150ml of water to form a transparent solution, add 1 mol / L HCl dropwise during the stirring process until white precipitate appears, and filter to obtain EDTA; weigh 21g of EDTA and 30ml of acetic anhydride in 40 ml of pyridine to form a suspension, stirred in an oil bath at 72 °C for 24 h, washed with distilled water and then with diethyl ether after the reaction, then vacuum-dried at 50 °C to obtain white powdery solid EDTA dianhydride (EDTAD).

[0119] (2) Preparation of EDTAD functionalized microcrystalline cellulose (ME):

[0120] Weigh 3 g of MCC and 12 g of EDTAD in 150 ml of DMF, and stir magnetically in an oil bath at 73°C for 30 h. Suction filtration after washing, and vacuum drying at 50°C to obtain a light yellow powdery solid compound, namely, EDTAD functionalized microcrystalline cellulose ME;

[0121] (3) Preparation of N-hydroxysuccinimide-activated f...

Embodiment 3

[0129] (1) Synthesis of EDTA dianhydride (EDTAD):

[0130] Weigh 40g of EDTA disodium salt and dissolve it in 200ml of water to form a transparent solution. During stirring, add 2 mol / L HCl dropwise until a white precipitate appears, and filter to obtain EDTA; weigh 25g of EDTA and 40ml of acetic anhydride in 50 ml pyridine to form a suspension, stirred in an oil bath at 75 °C for 36 h, washed with distilled water and then with diethyl ether after the reaction, then vacuum-dried at 50 °C to obtain white powdery solid EDTA dianhydride (EDTAD).

[0131] (2) Preparation of EDTAD functionalized microcrystalline cellulose (ME):

[0132] Weigh 3 g of MCC and 10 g of EDTAD in 120 ml of DMF, and stir magnetically in an oil bath at 65 °C for 20 h. Suction filtration after washing, and vacuum drying at 50°C to obtain a light yellow powdery solid compound, namely, EDTAD functionalized microcrystalline cellulose ME;

[0133] (3) Preparation of N-hydroxysuccinimide-activated functional c...

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Abstract

The invention discloses a cellulose chemical crosslinking based gelatin film and a preparation method thereof, and belongs to the field of modified gelatin. The preparation method of the cellulose chemical crosslinking based gelatin film comprises steps as follows: 1), EDTA (ethylene diamine tetraacetic acid) dianhydride and microcrystalline cellulose are taken as raw materials to prepare EDTA dianhydride functionalized microcrystalline cellulose ME; 2), N- hydroxysuccinimide and ME obtained in the step 1) are taken as raw materials to prepare the macromolecular cross-linking agent MEN; 3), the macromolecular cross-linking agent MEN and the gelatin film are subjected to chemical crosslinking to prepare the cellulose chemical crosslinking based gelatin film. The ester group in the cross-linking agent MEN can have a crosslinking reaction with primary amino in gelatin, the gelatin film is modified in a chemical reaction manner, and the limitation of gelatin modification through cellulose macromolecule blending in the prior art is broken. The heat stability, the degradation resistance, the mechanical property (elasticity), the light blocking performance and the hydrophobicity of the gelatin film are improved to a greater degree.

Description

technical field [0001] The invention relates to the field of modified gelatin, in particular to a gelatin film based on cellulose chemical crosslinking and a preparation method thereof. Background technique [0002] Gelatin is a heterogeneous peptide molecular polymer produced by the hydrolysis of collagen. It is a natural polymer material with good cell compatibility and biodegradability. However, its application is limited due to its low thermal stability, poor mechanical properties, and easy degradation. Therefore, gelatin is often modified. [0003] Microcrystalline cellulose (MCC) is a kind of linear polysaccharide macromolecular structure connected by b-glycosidic bonds, and gelatin is often modified by blending. For example, Alves studied the effect of cellulose content on the biodegradability, mechanical properties and moisture permeability of gelatin / cellulose / starch blend films (J.S. Alves, K.C. dos Reis, E.G.T. Menezes, F.V. Pereira, J. Pereira. Carbohydrate Poly...

Claims

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Application Information

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IPC IPC(8): C08J3/24C08L89/00C08L1/02C08J5/18
Inventor 陶芙蓉庄辰崔月芝
Owner QILU UNIV OF TECH
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