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Collagen plastic and preparation method thereof

A collagen and plastic technology, applied in the field of collagen plastic and its preparation, can solve the problems of strength, thermal stability, long-term durability limitations, etc., and achieve the effects of avoiding toxicity, improving mechanical properties and thermal stability, and low price

Inactive Publication Date: 2014-10-22
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the physical blending modification between such polymer materials is still very limited in terms of strength, thermal stability and long-term durability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1 Firstly, using tanning leather leftovers as raw materials, select an ammonia-free deliming agent for deliming and neutralization, and then mechanically defibrate to obtain powdered collagen fibers after natural drying, and obtain white skin powder after drying; then the above-prepared White skin powder and dialdehyde starch are blended at a mass ratio of 10:1, and glycerin with a dry weight of 20% of white skin powder is added, and stirred at room temperature for 1 hour; finally, the mixture is injected into a twin-screw extruder, at 50°C, Processing under the condition of 300rpm, the collagen plastic is obtained.

Embodiment 2

[0018] Example 2 Firstly, using tanning leather leftovers as raw materials, select an ammonia-free deliming agent for deliming and neutralization, and after natural drying, mechanically defibrate to obtain powdered collagen fibers, and after drying, white skin powder is obtained; then the above-prepared White skin powder and dialdehyde starch are blended at a mass ratio of 10:2, and 10% propylene glycol and 5% mannitol are added to the dry weight of white skin powder, and stirred at room temperature for 1.5 hours; finally, the mixture is injected into a twin-screw extruder , processed at 150°C and 150rpm to obtain collagen plastic.

Embodiment 3

[0019] Example 3 Firstly, using tannery leftovers as raw materials, select an ammonia-free deliming agent for deliming and neutralization, after natural drying, mechanically defibrate to obtain powdered collagen fibers, and obtain white skin powder after drying; then the above-prepared White skin powder and dialdehyde starch are blended in a mass ratio of 10:5, and 10% monoglyceride of dry weight of white skin powder is added, and stirred at room temperature for 2 hours; finally, the mixture is injected into a twin-screw extruder, and the mixture is mixed at 120 ℃, 250rpm under the condition of processing, made of collagen plastics.

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PUM

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Abstract

The invention relates to a collagen plastic and a preparation method thereof. The method comprises the following steps: preparing white leather powder from leather-making leftover materials at first; then blending the white leather powder with dialdehyde starch according to a mass ratio of 10: 1-10; adding a plasticizer accounting for 10 to 30% of the dry weight of the white leather powder and carrying out stirring at room temperature for 1 to 3 h; and carrying out processing via a double-screw extruder at 50 to 180 DEG C at a speed of 100 to 300 rpm so as to prepare the collagen plastic. The collagen plastic prepared in the invention has high mechanical strength and heat stability, good biocompatibility and environmental degradability, and wide application prospects in fields like biological materials, food and medicine packaging.

Description

technical field [0001] The invention relates to the technical field of plastics, in particular to a collagen plastic with high mechanical strength and thermal stability, non-toxic, harmless, good biocompatibility and environmental degradability and a preparation method thereof. Background technique [0002] Collagen is composed of polypeptide chains with repeating structural units formed by the polymerization of 19 amino acids. The molecule has a unique triple helical structure, and can self-assemble or induce aggregation to form microfibrils, and then cross-link to form fibrils. ), fiber (fibre) and fiber bundle network and other supramolecular structures. The thermal denaturation of proteins, that is, the phase transition behavior of deaggregation and uncoiling, makes the processing of protein-based plastics possible. [0003] Compared with vegetable protein, collagen is cheap and easy to obtain, and due to the negative impact of leather hydrolyzate being listed as "possi...

Claims

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Application Information

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IPC IPC(8): C08L89/06C08L3/04C08J3/24
Inventor 穆畅道葛黎明李德富林炜
Owner SICHUAN UNIV
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