CN103194007A - Making method of modified starch sheet - Google Patents
Making method of modified starch sheet Download PDFInfo
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- CN103194007A CN103194007A CN2012100027857A CN201210002785A CN103194007A CN 103194007 A CN103194007 A CN 103194007A CN 2012100027857 A CN2012100027857 A CN 2012100027857A CN 201210002785 A CN201210002785 A CN 201210002785A CN 103194007 A CN103194007 A CN 103194007A
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- starch
- modified starch
- making method
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- catalytic reforming
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Abstract
A making method of a modified starch sheet comprises the following steps: mixing a natural starch material, a catalytic modifier and an additive in an internal mixer in a sealed circulation environment, and carrying out stirring and internal mixing treatment to form a doughy modified starch block, wherein the catalytic modifier comprises a ferment to increase the hydrophobicity of the natural starch material, and the additive comprises calcium carbonate to reinforce the mechanical strength of the natural starch material; granulating the modified starch block by utilizing a granulator to form modified starch particles; and carrying out casting extrusion treatment of the modified starch particles by utilizing a casting machine to form the modified starch sheet. The modified starch generated through the catalytic modification in the invention has the advantages of environmental protection, energy saving, non-toxicity, combination with other sheets, cost reduction and product competitiveness improvement.
Description
Technical field
The present invention relates to a kind of making method of modified starch sheet material, especially utilize ferment to be used as the catalytic reforming agent with the hydrophobicity of increase native starch and to add calcium carbonate and be used as additive to strengthen physical strength.
Background technology
Various plastics or the rubber product of petrochemical industry manufacturing owing to have easy processing and a good advantage of wearing quality, therefore have been widely generally use, for example packaging vessel, textiles, facility shell, interior decoration building materials, tire, water pipe, plate etc.Yet, new line gradually along with environmental consciousness, the quite positive practice is encouraged to take in the statute of limitations and subsidy in countries in the world, to solve global petrochemical industry garbage problem, because general plastics or rubber product are difficult for natural decomposition, for example, polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP) and polystyrene (PS) needed just can be decomposed by the Nature in about 100～150 years.
Therefore, but industry active development biodegradable or decomposing material in recent years namely can partially or completely be degraded to low molecular material by the microorganism as bacterium, mould and algae at occurring in nature.For example, poly(lactic acid) (Polylactic acid, PLA), polycaprolactone (Polycaprolactone, PCL), polyvinyl alcohol (Polyvinyl alcohol, PVA) etc.
Be example with PLA, mainly be that the lactic acid that is refined with corn, beet, wheat is but that material is through the formed new bio decomposing macromolecular of chemosynthesis material, it is the derivative product of lactic acid, have nontoxic, nonirritant, bio-compatibility is good, intensity is high and characteristics such as biodegradable and absorption, is the most rising biodegradable macromolecular material at present.PLA is mainly used in biodegradable fiber, biodegradable plastics and medical material, such as operating sutures, nail, environment protecting tableware, environmentally-friendly plastic cup, food product pack material, fast food lunch-box, non-woven fabrics, industry and civilian cloth.PLA can utilize suitable processing mode and natural decomposition, and such as compost, and preferable treatment condition are: oxygen (non-enclosed space), the proper temperature (58 ℃～70 ℃) of sufficient aqueous vapor (relative humidity is more than 90%), abundance.
Yet the shortcoming of PLA is that whole material circulation institute's time spent is not short, and fusing point is low excessively, cause the difficulty in the recovery, and price competitiveness is not enough.Therefore, need a kind of making method of modified starch sheet material, the wetting ability that mat changes original starch material becomes the hydrophobicity of energy moisture-proof, to solve above-mentioned prior art problems.
Summary of the invention
Main purpose of the present invention comprises in the making method that a kind of modified starch sheet material is provided:
Utilize internal mixer under the closed loop border, to mix native starch material, catalytic reforming agent and additive, stirring internally mix handles, to form doughy modified starch agglomerate, wherein the catalytic reforming agent is in order to increasing the hydrophobicity of native starch material, and additive is in order to strengthen the physical strength of native starch material; Utilize tablets press that the modified starch agglomerate is carried out granulation and handle, to form granular modified starch particle; And utilize casting machine that the modified starch particle is carried out the curtain coating extrusion and handle, to form the modified starch sheet material of sheet.
Above-mentioned native starch material can comprise rice bar, rice husk, straw, leaf of Semen Maydis, Caulis Sacchari sinensis leaf, Exocarpium cocois (Cocos nucifera L), herbage, W-Gum, sweet potato starch, yam starch, wheat starch or its composition.The catalytic reforming agent can comprise ferment, and additive can comprise calcium carbonate.
Making method of the present invention is not used poly(lactic acid) (PLA), and the modified starch that is to use the native starch material to produce through the catalytic reforming effect of catalytic reforming agent, therefore has environmental protection, energy-conservation, nontoxic and be easy to advantage in conjunction with other material plate body, such as can be in conjunction with plastic plate, and then reduce cost, especially can be lower than general plastic plate, use the raising product competitiveness.
Description of drawings
Fig. 1 is the schema of the making method of modified starch sheet material of the present invention.
Embodiment
Following conjunction with figs. is done more detailed description to embodiments of the present invention, makes to be familiar with those skilled in the art and can to implement according to this after reading this specification sheets.
With reference to figure 1, the schema of the making method of modified starch sheet material of the present invention.As shown in Figure 1, making method of the present invention is begun by step S10, utilize internal mixer (Banbury Mixer) under the closed loop border, to mix native starch material, catalytic reforming agent and additive, use and stir the internally mix processing, and then form doughy modified starch agglomerate, wherein the weight percent of native starch material, catalytic reforming agent and additive is respectively 85～95%, 1～5% and 1～10%.
Above-mentioned native starch material can comprise rice bar, rice husk, straw, leaf of Semen Maydis, Caulis Sacchari sinensis leaf, Exocarpium cocois (Cocos nucifera L), herbage, W-Gum, sweet potato starch, yam starch, wheat starch or its composition.The catalytic reforming agent can comprise ferment, in order to increase the hydrophobicity of native starch material, such as the wetting ability functional group of the particular functional base that utilizes ferment in conjunction with the native starch material.For example, utilize the ferment contain the lipid acid functional group, with wetting ability functional group's (such as hydroxyl) of starch, carry out esterification and generate ester bond.Additive can comprise calcium carbonate, in order to strengthen the physical strength of native starch material.
In addition, above-mentioned stirring internally mix is handled and is further comprised heat treated, and wherein temperature is 120 ℃ to 220 ℃.
Then, in step S20, utilize tablets press that the modified starch agglomerate is carried out granulation and handle, to form granular modified starch particle, wherein the size of modified starch particle is 0.1mm to 5mm.
At last, enter step S30, utilize casting machine (Casting Film Machine) that the modified starch particle is carried out curtain coating and extrude processing, to form the modified starch sheet material of sheet, wherein casting machine is to utilize the hydrostomia quenching to stretch and nondirectional sheet material to produce not have.
The characteristics of making method of the present invention are not use poly(lactic acid) (PLA), and be to use general native starch material, after the catalytic reforming effect of catalytic reforming agent, produce the modified starch of the better water tolerance of tool and wearing quality, but natural decomposition and have environmental protection, energy-conservation, nontoxic advantage not only, be easy to simultaneously in conjunction with other material plate body, such as can be in conjunction with plastic plate, further reduce material cost, such as being lower than general plastic plate, thereby significantly improve competitiveness of product, so making method of the present invention quite has industry applications.
The above only is in order to explain preferred embodiment of the present invention, be not that attempt is done any pro forma restriction to the present invention according to this, therefore, all have in that identical invention spirit is following do relevant any modification of the present invention or change, all must be included in the category of claim of the present invention.
Claims (5)
1. the making method of a modified starch sheet material is characterized in that, this making method comprises:
Utilize an internal mixer under a closed loop border, to mix a native starch material, a catalytic reforming agent and an additive, carry out one and stir the internally mix processing, to form a doughy upgrading starch agglomerate, wherein the weight percent of native starch material, catalytic reforming agent and additive is respectively 85～95%, 1～5% and 1～10%, this catalytic reforming agent is in order to increasing the hydrophobicity of this native starch material, and this additive is in order to strengthen the physical strength of this native starch material;
Utilize a tablets press that this modified starch agglomerate is carried out a granulation and handle, to form a plurality of granular modified starch particles; And
Utilize a casting machine that described modified starch particle is carried out a curtain coating and extrude processing, to form the modified starch sheet material of a plurality of sheets.
2. making method as claimed in claim 1 is characterized in that, this native starch material comprises rice bar, rice husk, straw, leaf of Semen Maydis, Caulis Sacchari sinensis leaf, Exocarpium cocois (Cocos nucifera L), herbage, W-Gum, sweet potato starch, yam starch, wheat starch or its composition.
3. making method as claimed in claim 1 is characterized in that, this catalytic reforming agent comprises the ferment that contains the lipid acid functional group.
4. making method as claimed in claim 1 is characterized in that, this additive comprises calcium carbonate.
5. making method as claimed in claim 1 is characterized in that, this stirring internally mix is handled and comprised that further heat treated, temperature are 120 ℃ to 220 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100027857A CN103194007A (en) | 2012-01-06 | 2012-01-06 | Making method of modified starch sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100027857A CN103194007A (en) | 2012-01-06 | 2012-01-06 | Making method of modified starch sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103194007A true CN103194007A (en) | 2013-07-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100027857A Pending CN103194007A (en) | 2012-01-06 | 2012-01-06 | Making method of modified starch sheet |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1337969A (en) * | 1999-01-25 | 2002-02-27 | Ato公司 | Biopolymer nanoparticles |
| CN1637053A (en) * | 2004-12-10 | 2005-07-13 | 中国科学院长春应用化学研究所 | Completely biodegradable starch-base plastics and plastomer material and their prepn process |
-
2012
- 2012-01-06 CN CN2012100027857A patent/CN103194007A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1337969A (en) * | 1999-01-25 | 2002-02-27 | Ato公司 | Biopolymer nanoparticles |
| CN1637053A (en) * | 2004-12-10 | 2005-07-13 | 中国科学院长春应用化学研究所 | Completely biodegradable starch-base plastics and plastomer material and their prepn process |
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Application publication date: 20130710 |