CN102329484A - Method for preparing high-strength composite material from natural plant fibers and polylactic acid - Google Patents
Method for preparing high-strength composite material from natural plant fibers and polylactic acid Download PDFInfo
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- CN102329484A CN102329484A CN 201110215998 CN201110215998A CN102329484A CN 102329484 A CN102329484 A CN 102329484A CN 201110215998 CN201110215998 CN 201110215998 CN 201110215998 A CN201110215998 A CN 201110215998A CN 102329484 A CN102329484 A CN 102329484A
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- natural plant
- plant fibre
- polyactic acid
- composite material
- polylactic acid
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Abstract
The invention discloses a method for preparing a high-strength composite material from natural plant fibers and polylactic acid. The method comprises the following steps of: fully dissolving the polylactic acid; soaking the natural plant fibers in a dichloromethane solution of the polylactic acid, so that the liquid polylactic acid solution enters the fibers through surface pores and cell wall pits of the natural plant fibers; drying the remained natural plant fiber and polylactic acid mixture in an oven; and crushing, granulating, and preparing the natural plant fiber/polylactic acid composite material according to the conventional forming method. Therefore, a coupling agent is not needed to be added in the process of manufacturing the composite material, and the high-performance natural plant fiber/polylactic acid composite material can be prepared.
Description
Technical field
The invention belongs to matrix material and make the field, specifically is a kind of method of utilizing natural plant fibre and the compound manufacturing high-strength composite material of POLYACTIC ACID.
Background technology
Natural plant fibre has advantages such as length-to-diameter ratio is big, strength ratio is high, density is low, inexpensive, renewable and biodegradable, can with the compound preparation biodegradable composites of degradable plastics such as POLYACTIC ACID.
At present, the compound preparation matrix material of natural plant fibre and POLYACTIC ACID main method has compression molding, injection molding and extrusion moulding etc.No matter be which kind of molding mode; Before composite material forming, all need add hot milling and broken granulation to improve natural plant fibre and the compound homogeneity of POLYACTIC ACID, also need add a certain amount of coupling agent simultaneously to improve natural plant fibre and POLYACTIC ACID interface compatibility.But POLYACTIC ACID degraded to a certain degree can occur because of heating in the heating mixing process, simultaneously, causes the fracture of natural plant fibre easily because of natural plant fibre and POLYACTIC ACID repeated friction in the mixing process, and then influences the mechanical property of matrix material.In addition, add coupling agent and can increase the made cost to a certain extent.
Summary of the invention
The technical problem that the present invention solved is to provide a kind of method of utilizing natural plant fibre and the compound manufacturing high-strength composite material of POLYACTIC ACID, to solve the shortcoming in the above-mentioned background technology.
The technical problem that the present invention solved adopts following technical scheme to realize:
A kind of method of utilizing natural plant fibre and the compound manufacturing high-strength composite material of POLYACTIC ACID; Before Composite Preparation, earlier POLYACTIC ACID being put into dichloromethane solvent fully dissolves POLYACTIC ACID; Then natural plant fibre is put in the dichloromethane solution of POLYACTIC ACID and soaked 10 minutes, make approach such as surface pore and the cell walls pit of liquid POLYACTIC ACID solution through natural plant fibre get into fibrous inside.Then, adopt the method for pump suction make methylene dichloride fast volatilization and condensing and recycling utilize again, the natural plant fibre that stays and poly-lactic acid mixture are put into baking oven and are sent into crusher in drying under 80 ℃ of conditions after 4 hours and carry out broken granulation.Can adopt conventional forming method to prepare natural plant fibre/lactic acid composite material after the granulation.
Its concrete grammar is following:
(1) POLYACTIC ACID is poured in the container that methylene dichloride is housed, stirring is dissolved it fully;
(2) the POLYACTIC ACID dichloromethane solution is packed into it is dissolved fully in the container that has retrieving arrangement, then natural plant fibre is added in the container, natural plant fibre was immersed in the dichloromethane solution of POLYACTIC ACID 10 minutes fully;
(3) booster air pump is with the methylene dichloride rapid condensation recycling of highly volatile;
(4) take out remaining natural plant fibre and POLYACTIC ACID block mixture, send into baking oven and after under 80 ℃ of conditions dry 4 hours, utilize crusher to carry out broken granulation;
(5) adopt conventional forming method to prepare high-strength natural plant fibre/lactic acid composite material.
In the step in said process (2), the dichloromethane solution weight ratio of natural plant fibre and POLYACTIC ACID is 1:20.
Beneficial effect:Can the degree of depth get into natural plant fibre inside and form crosslinked shape POLYACTIC ACID structure after utilizing POLYACTIC ACID liquefaction of the present invention; The inner POLYACTIC ACID of natural plant fibre can fuse by outside POLYACTIC ACID with being coated on fiber behind the composite material forming; Can have more to imitate and transmit extraneous stress, and then improve composite materials property.Therefore, composite material manufacturing process need not to add coupling agent, can prepare high-performance natural vegetable fibre/lactic acid composite material.
Embodiment
Give an actual example below and describe the present invention.
Embodiment one:
1, the POLYACTIC ACID of 500g is poured in the round-bottomed flask of the methylene dichloride that 9500g is housed, with flask sealing and stir, make POLYACTIC ACID be dissolved in the methylene dichloride fully till (state keeps shut during stir process).
2, the mixing solutions that stirs is packed into have in the container of retrieving arrangement, then the 500g natural plant fibre is added in the container, make natural plant fibre be immersed in the POLYACTIC ACID dichloromethane solution fully and left standstill 10 minutes.
3, booster air pump is with the methylene dichloride rapid condensation recycling of highly volatile.
4, take out remaining natural plant fibre and POLYACTIC ACID block mixture, send into baking oven and after under 80 ℃ of conditions dry 4 hours, utilize crusher to carry out broken granulation.
In an embodiment, natural plant fibre can directly be used to adopt conventional forming method to prepare high-strength natural plant fibre/lactic acid composite material after taking out.
Embodiment two:
1, with the POLYACTIC ACID of 600g pour into methylene dichloride that 7400g is housed round-bottomed flask in, with the flask sealing and stir, make POLYACTIC ACID be dissolved in the methylene dichloride fully till (state keeps shut during stir process).
2, the mixing solutions that stirs is packed into have in the container of retrieving arrangement, then the 400g natural plant fibre is added in the container, make natural plant fibre be immersed in the POLYACTIC ACID dichloromethane solution fully and left standstill 10 minutes.
3, booster air pump is with the methylene dichloride rapid condensation recycling of highly volatile.
4, take out remaining natural plant fibre and POLYACTIC ACID block mixture, send into baking oven and after under 80 ℃ of conditions dry 6 hours, utilize crusher to carry out broken granulation.
In an embodiment, natural plant fibre can directly be used to adopt conventional forming method to prepare high-strength natural plant fibre/lactic acid composite material after taking out.
More than show and described ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; The present invention is not restricted to the described embodiments; That describes in the foregoing description and the specification sheets just explains principle of the present invention; Under the prerequisite that does not break away from spirit and scope of the invention, the present invention also has various changes and modifications, and these variations and improvement all fall in the scope of the invention that requires protection.The scope of the claimed invention by the appended claims and their equivalents defined
.
Claims (2)
1. method of utilizing natural plant fibre and the compound manufacturing high-strength composite material of POLYACTIC ACID; It is characterized in that; Before Composite Preparation, earlier POLYACTIC ACID being put into dichloromethane solvent fully dissolves POLYACTIC ACID; Then natural plant fibre is put in the dichloromethane solution of POLYACTIC ACID and soaked 10 minutes; Make approach such as surface pore and the cell walls pit of liquid POLYACTIC ACID solution through natural plant fibre get into fibrous inside; Adopt again the method for pump suction make methylene dichloride fast volatilization and condensing and recycling utilize again, the natural plant fibre that stays and poly-lactic acid mixture are put into baking oven and after under 80 ℃ of conditions dry 4 hours, are sent into crusher and carry out broken granulation, can adopt the forming method of routine to prepare natural plant fibre/lactic acid composite material after the granulation.
2. a kind of method of utilizing natural plant fibre and the compound manufacturing high-strength composite material of POLYACTIC ACID according to claim 1 is characterized in that its concrete grammar is following:
(1) POLYACTIC ACID is poured in the container that methylene dichloride is housed, stirring is dissolved it fully;
(2) the POLYACTIC ACID dichloromethane solution is packed into have in the container of retrieving arrangement; Then natural plant fibre is added in the container; Natural plant fibre and POLYACTIC ACID dichloromethane solution weight ratio are 1:20, and natural plant fibre was immersed in the POLYACTIC ACID dichloromethane solution 10 minutes fully;
(3) booster air pump is with the methylene dichloride rapid condensation recycling of highly volatile;
(4) take out remaining natural plant fibre and POLYACTIC ACID block mixture, send into baking oven and after under 80 ℃ of conditions dry 4 hours, utilize crusher to carry out broken granulation;
(5) adopt conventional forming method to prepare high-strength natural plant fibre/lactic acid composite material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110215998 CN102329484A (en) | 2011-07-30 | 2011-07-30 | Method for preparing high-strength composite material from natural plant fibers and polylactic acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110215998 CN102329484A (en) | 2011-07-30 | 2011-07-30 | Method for preparing high-strength composite material from natural plant fibers and polylactic acid |
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| CN102329484A true CN102329484A (en) | 2012-01-25 |
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| CN 201110215998 Pending CN102329484A (en) | 2011-07-30 | 2011-07-30 | Method for preparing high-strength composite material from natural plant fibers and polylactic acid |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110511547A (en) * | 2019-10-09 | 2019-11-29 | 南京林业大学 | Composition, composite material and preparation method for 3D printing |
| CN114762533A (en) * | 2021-01-12 | 2022-07-19 | 云南恩典科技产业发展有限公司 | Low-temperature slow-release flavoring particles for cigarette filter stick and preparation method and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1488673A (en) * | 2003-08-21 | 2004-04-14 | 上海交通大学 | Modified chitin fiber reinforced poly lactic acid composite material and preparing method thereof |
| US20090221755A1 (en) * | 2008-02-29 | 2009-09-03 | Sony Corporation | Resin composition |
| CN101538401A (en) * | 2009-03-13 | 2009-09-23 | 上海大学 | High temperature resistance binary fiber/polylactic acid based composite material and preparation method thereof |
-
2011
- 2011-07-30 CN CN 201110215998 patent/CN102329484A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1488673A (en) * | 2003-08-21 | 2004-04-14 | 上海交通大学 | Modified chitin fiber reinforced poly lactic acid composite material and preparing method thereof |
| US20090221755A1 (en) * | 2008-02-29 | 2009-09-03 | Sony Corporation | Resin composition |
| CN101538401A (en) * | 2009-03-13 | 2009-09-23 | 上海大学 | High temperature resistance binary fiber/polylactic acid based composite material and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 《Composites Science and Technology》 20031231 Takashi Nishino et al. Kenaf reinforced biodegradable composite 1281-1286 1-2 第63卷, * |
| 《世界竹藤通讯》 20090815 李新功等 生物可降解竹纤维增强塑料复合材料成型工艺 22-26 1-2 第7卷, 第4期 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110511547A (en) * | 2019-10-09 | 2019-11-29 | 南京林业大学 | Composition, composite material and preparation method for 3D printing |
| CN114762533A (en) * | 2021-01-12 | 2022-07-19 | 云南恩典科技产业发展有限公司 | Low-temperature slow-release flavoring particles for cigarette filter stick and preparation method and application thereof |
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Application publication date: 20120125 |