CN104387683A - Preparation method of biodegradable composite plastic - Google Patents

Abstract

The invention discloses a biodegradable green composite plastic which comprises a substrate and a reinforcing material. The substrate comprises the following materials in parts by weight: 60 parts of polystyrene, 30 parts of degradation accelerator, 4 parts of inorganic antimicrobial agent, 4 parts of plasticizer, 4 parts of antioxidant, 3 parts of dispersing agent and 5 parts of stearic acid. The reinforcing material is natural bamboo fibers which account for more than 25 wt% in the biodegradable green composite plastic. The natural bamboo fibers in the biodegradable green composite plastic have the characteristics of large length-diameter ratio, high specific strength, large specific area, low density and low price. By combining the natural bamboo fibers with the biodegradable plastic substrate, the composite material has the advantages of favorable processability, high strength, high degradation rate, low manufacturing cost, low price and the like, and is beneficial to environmental protection.

Description

A kind of biodegradable composite plastic preparation method

Technical field

The present invention relates to a kind of plastic formula, particularly relate to a kind of biodegradable composite plastic preparation method.

Background technology

Along with I crosses agricultural, industrial expansion, plastic prod has become one of starting material of indispensable product use or manufacture in every field, and the advantage of plastics brings many facilities in people's live and work, but brings serious environmental pollution.Plastics have the characteristic of acid and alkali-resistance, anti-oxidant, difficult burn into difficult degradation, and buried process a century is not rotten, produces a large amount of toxic gases during burning.

There has been research and development and the production of various biodegradable plastic in prior art, but its production cost is high, plastic strength is low, poor processability, seriously constrains its development in Green Composites.

Natural bamboo fibres is the abundantest natural macromolecular material of occurring in nature, its production is up to hundred billion tons, utilize natural bamboo fibres resource, give full play to function and the characteristic of its uniqueness, and natural bamboo fibres and the green composite plastic of biodegradable are the effective ways utilizing this resource, greatly can reduce the manufacturing cost of biodegradable plastic simultaneously.

Summary of the invention

The technical problem that the present invention mainly solves is to provide a kind of biodegradable green composite plastic; wherein natural bamboo fibres length-to-diameter ratio is large, specific tenacity is high, specific surface area is large, density is low, the excellent honest and clean feature of price; natural bamboo fibres is combined with bio-degradable plastics base material; it is good that its matrix material has processing characteristics; the advantages such as intensity is high, degradation speed is fast, cost of manufacture is low, cheap, are conducive to the protection of environment simultaneously.

For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: for a kind of biodegradable green composite plastic, comprise base material and strongthener, described base material comprises the material of following weight part: polystyrene 60 parts, degradation of promoter 30 parts, inorganic antiseptic 4 parts, 4 parts, softening agent, 4 parts, oxidation inhibitor, dispersion agent 3 parts, stearic acid 5 parts, set strongthener is natural bamboo fibres, and described natural bamboo fibres shared weight percent in biodegradable green composite plastic is greater than 25%.

In the present invention's preferred embodiments, described basic unit comprises the material of following weight part: vinylbenzene 50 parts, starch 20 parts, inorganic antiseptic 2 parts, 3 parts, softening agent, 2 parts, oxidation inhibitor, dispersion agent 2 parts, stearic acid 2 parts, degradation of promoter 2 parts.

In the present invention's preferred embodiments, described inorganic antibacterial material is the one in nano titanium oxide or earth composite phosphate.

In the present invention's preferred embodiments, described degradation of promoter is one or both in W-Gum or Starch rice.

In the present invention's preferred embodiments, the particle of described W-Gum or Starch rice is 350 ~ 650 orders.

In the present invention's preferred embodiments, described natural bamboo fibres adds coupling agent again and enters type process after depletion process.

In the present invention's preferred embodiments, in described alkali lye, the content of alkali is 1%, and all the other are deionized water.

In the present invention's preferred embodiments, described coupling agent is Methionin based isocyanate.

The invention has the beneficial effects as follows: invention provides a kind of biodegradable green composite plastic; wherein natural bamboo fibres length-to-diameter ratio is large, specific tenacity is high, specific surface area is large, density is low, the excellent honest and clean feature of price; natural bamboo fibres is combined with bio-degradable plastics base material; it is good that its matrix material has processing characteristics; the advantages such as intensity is high, degradation speed is fast, cost of manufacture is low, cheap, are conducive to the protection of environment simultaneously.

 

Embodiment

Below better example of executing of the present invention is described in detail, can be easier to make advantages and features of the invention be readily appreciated by one skilled in the art, thus more explicit defining is made to protection scope of the present invention.

A kind of biodegradable green composite plastic, comprise base material and strongthener, described base material comprises the material of following weight part: polystyrene 60 parts, degradation of promoter 30 parts, inorganic antiseptic 4 parts, 4 parts, softening agent, 4 parts, oxidation inhibitor, dispersion agent 3 parts, stearic acid 5 parts, set strongthener is natural bamboo fibres, and described natural bamboo fibres shared weight percent in biodegradable green composite plastic is greater than 25%.Further, described basic unit comprises the material of following weight part: vinylbenzene 50 parts, starch 20 parts, inorganic antiseptic 2 parts, 3 parts, softening agent, 2 parts, oxidation inhibitor, dispersion agent 2 parts, stearic acid 2 parts, degradation of promoter 2 parts.

Further, described inorganic antibacterial material is the one in nano titanium oxide or earth composite phosphate.

Further, described degradation of promoter is one or both in W-Gum or Starch rice.

Further, the particle of described W-Gum or Starch rice is 800 orders.

Further, described natural bamboo fibres adds coupling agent again and enters type process after depletion process.

Further, in described alkali lye, the content of alkali is 1%, and all the other are deionized water.

Further, described coupling agent is Methionin based isocyanate.

In sum; the biodegradable green composite plastic of one provided by the invention; wherein natural bamboo fibres length-to-diameter ratio is large, specific tenacity is high, specific surface area is large, density is low, the excellent honest and clean feature of price; natural bamboo fibres is combined with bio-degradable plastics base material; it is good that its matrix material has processing characteristics; the advantages such as intensity is high, degradation speed is fast, cost of manufacture is low, cheap, are conducive to the protection of environment simultaneously.

The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present invention.

Claims (8)

1. a biodegradable green composite plastic, it is characterized in that, comprise base material and strongthener, described base material comprises the material of following weight part: polystyrene 60 parts, degradation of promoter 30 parts, inorganic antiseptic 4 parts, 4 parts, softening agent, 4 parts, oxidation inhibitor, dispersion agent 3 parts, stearic acid 5 parts, set strongthener is natural bamboo fibres, and described natural bamboo fibres shared weight percent in biodegradable green composite plastic is greater than 25%.

2. according to the biodegradable green composite plastic described in claim 1, it is characterized in that, described basic unit comprises the material of following weight part: vinylbenzene 50 parts, starch 20 parts, inorganic antiseptic 2 parts, 3 parts, softening agent, 2 parts, oxidation inhibitor, dispersion agent 2 parts, stearic acid 2 parts, degradation of promoter 2 parts.

3. according to the biodegradable green composite plastic described in claim 1, it is characterized in that, described inorganic antibacterial material is the one in nano titanium oxide or earth composite phosphate.

4. according to the biodegradable green composite plastic described in claim 1, it is characterized in that, described degradation of promoter is one or both in W-Gum or Starch rice.

5. according to the biodegradable green composite plastic described in claim 4, it is characterized in that, the particle of described W-Gum or Starch rice is 800 orders.

6. according to the biodegradable green composite plastic described in claim 1, it is characterized in that, described natural bamboo fibres adds coupling agent again and enters type process after depletion process.

7. according to the biodegradable green composite plastic described in claim 6, it is characterized in that, in described alkali lye, the content of alkali is 1%, and all the other are deionized water.

8. according to the biodegradable green composite plastic described in claim 6, it is characterized in that, described coupling agent is Methionin based isocyanate.