CN104277248A - Starch plastic water resistance improving method - Google Patents
Starch plastic water resistance improving method Download PDFInfo
- Publication number
- CN104277248A CN104277248A CN201310281976.6A CN201310281976A CN104277248A CN 104277248 A CN104277248 A CN 104277248A CN 201310281976 A CN201310281976 A CN 201310281976A CN 104277248 A CN104277248 A CN 104277248A
- Authority
- CN
- China
- Prior art keywords
- starch
- trifluoroacetic anhydride
- starch plastic
- plastic
- water resistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention relates to a starch plastic water resistance improving method, and belongs to high added value utilization of renewable biomass resources. The method is as follows: first, trifluoroacetic anhydride as an internal plasticizer is added into starch for esterification of the starch and the trifluoroacetic anhydride to produce ester groups, at the same time, the surface of starch molecules is grafted with fluorine atoms, and through glycerol external plasticization and then through extrusion with a double screw extruder, trifluoroacetic anhydride externally plasticized starch plastic is obtained. The trifluoroacetic anhydride contains the fluorine atoms, and the fluorine atoms have a relatively low surface energy, so that by the use of the anhydride groups of the trifluoroacetic anhydride, the fluorine atoms are grafted onto the surface of starch molecules to improve the water resistance of the starch plastics.
Description
Technical field
The invention belongs to the high value added utilization field of starch plastic, relate to a kind of preparation method of treated starch plastics.
Background technology
Starch molecule is made up of glucose unit, and each unit has 3 hydrophilic hydroxyls.Native starch is intermolecular exists hydrogen chain, and solvability is very poor, hydrophilic but not soluble in water.Melting process is not had, more than 300 DEG C decomposition during heating.But starch can destroy crystalline structure of starch by physical process under certain condition, starch molecule is made to become disordering.This starch is different with native granular shape starch, heats plastic, so there is people to be referred to as thermoplastic starch (TPS).But, after natural starch transition is TPS, due to the intermolecular hydrogen bond rupture of ative starch, make many hydroxyls be in state comparatively freely, thus considerably increase the wetting ability of TPS.Poor water resistance is the outstanding problem that current TPS plastics exist in the application, also has a certain impact to aspects such as mechanical properties.
Carrying out esterification to starch is one of method improving starch water tolerance.Containing fluorine atom in trifluoroacetic anhydride, and fluorine atom has lower surface energy, therefore utilizes the anhydride group in trifluoroacetic anhydride to make fluorine atom be grafted to starch molecule surface, can improve the water tolerance of starch plastic.This experiment is exactly utilize this feature of trifluoroacetic anhydride, and make it carry out internal plasticization to starch, glycerine carries out physical plasticizing to starch, prepares thermoplastic starch plastic further with twin screw extruder.
Exploring and open up the frontier of reproducible biomass resource application and study the enhancing of thermoplastic starch, is all the current hot subject with studying both at home and abroad from now on.At present, in order to glycerine as external plasticizer, trifluoroacetic anhydride is as internal plasticizer, and the research being used for improving starch plastic water tolerance have not been reported.
Summary of the invention
First starch mix with trifluoroacetic anhydride and seal for some time by the present invention by a certain percentage, then mix by a certain percentage with glycerine, then extruded by twin screw extruder, thus obtain the starch plastic improveing water tolerance.
For achieving the above object, the preparation method that the present invention adopts is:
1) plasticizing of starch
Containing fluorine atom in trifluoroacetic anhydride, and fluorine atom has lower surface energy, therefore utilizes the anhydride group in trifluoroacetic anhydride to make fluorine atom be grafted to starch molecule surface, effectively can improve the water tolerance of starch plastic.Reactional equation is as shown in the figure:
Step:
Take the trifluoroacetic anhydride of 300g starch and certain mass, add in high speed dispersor, to be mixed evenly after, load in sealing bag, place 24h.Make starch and trifluoroacetic anhydride generation esterification, connect fluorine atom on starch molecule surface while generating ester group, thus improve the water resistance of starch plastic better.Again the glycerine of 100g identical in quality is joined in reacted starch respectively, fully mixed by high speed dispersor, obtain internally plasticized thermoplastic starch.
2) the extruding of thermoplastic starch
By the powdery thermoplastic starch of gained by extruding and injection moulding, required starch plastic goods can be obtained.
Step:
Thermoplastic starch is extruded under twin screw extruder shear at high temperature condition, each district temperature be respectively 110 DEG C, 115 DEG C, 115 DEG C, 110 DEG C (from spout to ground).Pelletizing, is injected into dumbbell shaped batten, and injection moulding machine each district temperature is respectively 125 DEG C, 120 DEG C, 125 DEG C, 130 DEG C, 130 DEG C.
The invention has the advantages that:
1) starch used in the present invention is natural reproducible material, environmental protection.
2) use in the present invention starch there is good biocompatibility.
3) the present invention is improved by the internally plasticized starch plastic mechanical property of trifluoroacetic anhydride, water resistance.
4) the treated starch plastics that prepared by the present invention can be used for food packaging industry.
5) synthetic route and technique simple.
Embodiment
Embodiment 1: take 300g starch, 0.3g trifluoroacetic anhydride, after mixing, be placed in sealing bag 24h, fully mixed by centrifugal stirrer with the glycerine of 100g again, extrude under twin screw extruder shear at high temperature condition, each district temperature be respectively 110 DEG C, 115 DEG C, 115 DEG C, 110 DEG C (from spout to ground).Pelletizing, injection moulding, injection moulding machine each district temperature is respectively 125 DEG C, 120 DEG C, 125 DEG C, 130 DEG C, 130 DEG C.
Embodiment 2: take 300g starch, 0.5g trifluoroacetic anhydride, after mixing, be placed in sealing bag 24h, fully mixed by centrifugal stirrer with the glycerine of 100g again, extrude under twin screw extruder shear at high temperature condition, each district temperature be respectively 110 DEG C, 115 DEG C, 115 DEG C, 110 DEG C (from spout to ground).Pelletizing, injection moulding, injection moulding machine each district temperature is respectively 125 DEG C, 120 DEG C, 125 DEG C, 130 DEG C, 130 DEG C.
Embodiment 3: take 300g starch, 0.7g trifluoroacetic anhydride, after mixing, be placed in sealing bag 24h, fully mixed by centrifugal stirrer with the glycerine of 100g again, extrude under twin screw extruder shear at high temperature condition, each district temperature be respectively 110 DEG C, 115 DEG C, 115 DEG C, 110 DEG C (from spout to ground).Pelletizing, injection moulding, injection moulding machine each district temperature is respectively 125 DEG C, 120 DEG C, 125 DEG C, 130 DEG C, 130 DEG C.
Embodiment 4: take 300g starch, 0.9g trifluoroacetic anhydride, after mixing, be placed in sealing bag 24h, fully mixed by centrifugal stirrer with the glycerine of 100g again, extrude under twin screw extruder shear at high temperature condition, each district temperature be respectively 110 DEG C, 115 DEG C, 115 DEG C, 110 DEG C (from spout to ground).Pelletizing, injection moulding, injection moulding machine each district temperature is respectively 125 DEG C, 120 DEG C, 125 DEG C, 130 DEG C, 130 DEG C.
Claims (5)
1. improve a method for starch plastic water tolerance, it is characterized in that: the thermoplastic starch plastic of improvement obtains according to the following step:
Take 300g starch, add trifluoroacetic anhydride (0.3 ~ 0.9g), after mixing, 24h is placed in sealing, mix with the glycerine of 100g, extrude under twin screw extruder shear at high temperature condition, each district temperature is 110 ~ 115 DEG C (from spout to ground).Pelletizing, is injected into dumbbell shaped batten, and injection moulding machine each district temperature is respectively 120 ~ 130 DEG C.
2. the preparation method based on the internally plasticized starch plastic of trifluoroacetic anhydride according to claim 1, is characterized in that: starch wants sealed reaction 24h after mixing with trifluoroacetic anhydride.
3. the preparation method based on the internally plasticized starch plastic of trifluoroacetic anhydride according to claim 1, is characterized in that: trifluoroacetic anhydride is 0.3 ~ 0.9g (i.e. W-Gum quality 0.1% ~ 0.3%) in the quality of starch plastic.
4. the preparation method based on the internally plasticized starch plastic of trifluoroacetic anhydride according to claim 1, is characterized in that: each district temperature of twin screw extruder is 110 ~ 115 DEG C (from spout to ground).
5. the preparation method based on the internally plasticized starch plastic of trifluoroacetic anhydride according to claim 1, is characterized in that: injection moulding machine each district temperature is 120 ~ 130 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310281976.6A CN104277248A (en) | 2013-07-04 | 2013-07-04 | Starch plastic water resistance improving method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310281976.6A CN104277248A (en) | 2013-07-04 | 2013-07-04 | Starch plastic water resistance improving method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104277248A true CN104277248A (en) | 2015-01-14 |
Family
ID=52252625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310281976.6A Pending CN104277248A (en) | 2013-07-04 | 2013-07-04 | Starch plastic water resistance improving method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104277248A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110818807A (en) * | 2018-08-07 | 2020-02-21 | 吴勇 | Two-stage surface reaction treatment method of natural plant high molecular starch |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101311208A (en) * | 2007-05-25 | 2008-11-26 | 江华 | Thermoplastic starch and method for preparing same |
| CN102633890A (en) * | 2012-04-22 | 2012-08-15 | 吉林大学 | Surface cross-linking esterification compound modification method of starch nanocrystal |
-
2013
- 2013-07-04 CN CN201310281976.6A patent/CN104277248A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101311208A (en) * | 2007-05-25 | 2008-11-26 | 江华 | Thermoplastic starch and method for preparing same |
| CN102633890A (en) * | 2012-04-22 | 2012-08-15 | 吉林大学 | Surface cross-linking esterification compound modification method of starch nanocrystal |
Non-Patent Citations (5)
| Title |
|---|
| BYUNG Y. YANG，ET AL.: "Acylation of Starch using Trifluoroacetic Anhydride Promoter", 《STARCH/STARKE》 * |
| 任丽丽: "热塑性淀粉的表面酯化修饰", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
| 张水洞: "《酯化淀粉的研究进展》", 《化学研究与应用》 * |
| 彭雅丽 等: "酸解、酯化及其复合变性淀粉的研究进展", 《技术.淀粉工程》 * |
| 罗发兴 等: "淀粉疏水改性及其应用", 《包装工程》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110818807A (en) * | 2018-08-07 | 2020-02-21 | 吴勇 | Two-stage surface reaction treatment method of natural plant high molecular starch |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106220996B (en) | Silicon carbon black/composite polyolefine material preparation method | |
| Xie et al. | Plasticizer combinations and performance of wood flour–poly (lactic acid) 3D printing filaments | |
| CN101747645B (en) | Method for preparing bamboo plastic composite material | |
| CN101824229B (en) | Thermoplastic plant fiber/polylactic acid blending material and preparation method thereof | |
| CN102604164A (en) | Master batch capable of fully and biologically degrading plastic film and preparation method thereof | |
| CN104592724A (en) | Biaxially oriented poly lactic acid (BOPLA) thermal contraction type film for high-speed automatic packaging machine, and preparation method of BOPLA thermal contraction type film | |
| CN105670191A (en) | Special material for modified starch-polyvinyl alcohol degradable membrane | |
| CN104592620A (en) | Resin/graphene conductive plastic master batch as well as preparation method and use thereof | |
| CN102604347B (en) | Preparation method of chitosan modified polylactic acid material by gamma-ray irradiation | |
| CN206527932U (en) | A kind of PE bags makes of raw material melting device | |
| CN103012856A (en) | Microcrystalline cellulose and polyvinyl alcohol reinforced starch-based full-biodegradable blending material and preparation method thereof | |
| CN103819748A (en) | Preparing method for starch-based degradable packaging film bag | |
| CN102276972A (en) | Polychloroprene/acrylonitrile butadiene styrene (PC/ABS) defective material recovery composition and preparation method thereof | |
| CN101792539B (en) | Method for preparing full-starch full-biodegradable thermoplastic plastic | |
| CN101864184B (en) | Thermoplastic vegetable fiber/starch blending material and preparation method thereof | |
| CN108047503A (en) | A kind of PBAT polyester compositions and preparation method thereof and nucleating agent used | |
| CN105131542A (en) | Blended composite material prepared from lactide surface grafted bamboo powder and polylactic acid, and preparation method and applications thereof | |
| CN104277248A (en) | Starch plastic water resistance improving method | |
| CN101864176B (en) | Thermoplastic vegetable protein/starch blending material and preparation method thereof | |
| CN103980586A (en) | Biodegradable plastic film composition and biodegradable plastic film preparation method | |
| CN103319828B (en) | preparation method of biodegradable plastic | |
| CN107619502A (en) | A kind of biodegradable plastic film | |
| CN105176021A (en) | Preparation method of high-impact-resistance polyethylene terephthalate particles | |
| CN114589831B (en) | Thermoplastic starch or starch/macromolecule blend prepared by in-situ reaction extrusion plasticizing or plasticizing compatibilization process | |
| CN107267122A (en) | A kind of production technology for phase-change accumulation energy module of shaping |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150114 |