Lignin/polycaprolactone environment-friendly degradable film and preparation method thereof

A technology of polycaprolactone and degradable film, which is applied in the field of lignin/polycaprolactone environmentally friendly degradable film and its preparation, can solve the problems of poor enterprise condition and secondary pollution of the environment, and achieves improvement of mixing uniformity and improved mixing efficiency. The effect of improving the interfacial bonding force and the degree of phase separation between the two-phase interface

Inactive Publication Date: 2013-02-13
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Completely biodegradable plastics are in the stage of product application testing, and their products are actively developing markets in the fields of medical materials and high-end packaging materials; at the same time, my country's degradable plastics are still mainly starch-filled, and this material is partially degraded. It causes secondary pollution to the environment and has basically been eliminated abroad. Therefore, domestic enterprises that mainly produce starch-filled degradable materials are in poor condition.

Method used

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  • Lignin/polycaprolactone environment-friendly degradable film and preparation method thereof
  • Lignin/polycaprolactone environment-friendly degradable film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A specific preparation method of a lignin / polycaprolactone environmentally friendly degradable film is as follows: mix 30g lignin with 270g polycaprolactone, add 5ml butyl titanate, 10mlDOP, 5ml glycerol, and mix well, Slowly add to a two-stage twin-screw extruder for extrusion, use circulating water to cool, then cut into pellets, and extrude and blow to form a film under the action of the screw extruder.

Embodiment 2

[0030] A specific preparation method of a lignin / polycaprolactone environmentally friendly degradable film is as follows: mix 60g lignin with 240g polycaprolactone, add 10ml butyl titanate, 15mlDOP, 8ml glycerol, mix and stir evenly, Slowly add to a two-stage twin-screw extruder for extrusion, use circulating water to cool, then cut into pellets, and extrude and blow to form a film under the action of the screw extruder.

Embodiment 3

[0032] A specific preparation method of a lignin / polycaprolactone environmentally friendly degradable film is as follows: mix 90g lignin with 210g polycaprolactone, add 15ml butyl titanate, 15mlDOP, 10ml glycerol, and mix well, Slowly add to a two-stage twin-screw extruder for extrusion, use circulating water to cool, then cut into pellets, and extrude and blow to form a film under the action of the screw extruder.

[0033] The mechanical property test results of the film blown according to this example (lignin / polycaprolactone blend film) are shown in Table 1 below:

[0034] Table 1:

[0035]

[0036] Note: The test conditions for mechanical properties in Table 1 are: test method (ASTMD 882-02), humidity 45%, temperature 30°C;

[0037] The average thickness of the lignin / polycaprolactone blend film is 0.412mm, the tensile strength is 8.28MPa, and the elongation is 716.73%. The mechanical properties of the blend film are good.

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Abstract

The invention discloses a lignin / polycaprolactone environment-friendly degradable film and a preparation method thereof. The preparation method is characterized by comprising the following steps: 5-50 parts by mass of lignin, 50-95 parts by mass of polycaprolactone, 10-20 parts by mass of dioctyl phthalate, 5-10 parts of by mass glycerol and 5-20 parts of by mass of solubilizer, and evenly mixing to obtain a blend compound; adding the blend compound into a double-screw extruder, carrying out melt blending at 60-140 DEG C under the pressure of 0.5-1.0 MPa for 10-15 minutes, extruding to form, cooling, and granulating to obtain the cylindrical granular blend material; and extruding the cylindrical granular blend material with an inflation film manufacturing machine, and carrying out blow molding and film formation to obtain the lignin / polycaprolactone environment-friendly degradable film. The lignin / polycaprolactone environment-friendly degradable film has the advantages of excellent degradability, excellent stretching resistance, excellent mechanical properties, wide raw material sources, simple technique and strong practicality, and can easily implement industrial production.

Description

technical field [0001] The invention belongs to the preparation of degradable films, and relates to a lignin / polycaprolactone environment-friendly degradable film and a preparation method thereof. Especially for. Background technique [0002] With the rapid development of the commodity economy, the demand for plastic packaging materials is increasing year by year, and its pollution and damage to the environment has also become prominent. Because plastic packaging is mostly a commodity with a short life cycle, especially disposable packaging, such as plastic bags, plastic boxes, plastic cups, plastic wrap, milk and yogurt packaging bags, product composite packaging bags, etc. From commodities to garbage, the amount of plastic waste has increased dramatically. Based on the pressure of environmental and social sustainable development, governments of various countries have attached great importance to the white pollution of plastics, and thus have given strong support to the r...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L97/00C08K5/12C08K5/053C08K5/00B29B9/06
Inventor 杨序平周叶徐静蒋海林晓艳张驰
Owner SOUTHWEAT UNIV OF SCI & TECH
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