CN1576358A - Starch /gelatin/glycerol aqueous compound elastic current change colloid - Google Patents
Starch /gelatin/glycerol aqueous compound elastic current change colloid Download PDFInfo
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- CN1576358A CN1576358A CN 200310124001 CN200310124001A CN1576358A CN 1576358 A CN1576358 A CN 1576358A CN 200310124001 CN200310124001 CN 200310124001 CN 200310124001 A CN200310124001 A CN 200310124001A CN 1576358 A CN1576358 A CN 1576358A
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Abstract
The present invention introduces one kind of composite elastic electrically rheological water containing starch/gelatin/glycerin colloid. The composite elastic electrically rheological colloid is prepared through dispersing water insoluble starch into medium comprising gelatin, glycerin and water under the action of DC electric field, and is one kind of water containing electrically rheological material with mechanical performance controlled with the dispersed phase grain concentration and externally applied electric field. It has simple preparation process, stable performance, no corrosion, no pollution and low cost; and its starch grain concentration regulating range is 0.5-35 wt% and corresponding compression modulus increment of 2-3 times. It has strongest electrically rheological effect in starch content of 25 wt%, and compression modulus increment of 60-65 % in gel electric field of 1.5-2 kV/mm and test electric field of 1.0-2.0 kV/mm.
Description
Technical field the present invention relates to a kind of organic rheology particle/moisture organic polymer rheologic colloid, particularly the moisture composite elastic rheologic colloid of starch/gelatin/glycerine
The background technology er material is the intelligent soft material of a class.Current liquid is scattered in the complex system of forming in the insulating liquid of low-k by the electrolyte granular of high-k, low conductivity.It has fast and reversibly electric field is made response, and can change the premium properties of its apparent viscosity and yielding stress by regulating strength of electric field, thereby is used to have wide practical use in industrial sector on the various instruments.But owing in use exist some shortcomings, sedimentation causes the imbalance of electric rheological effect as particulate, uses being corroded of instrument etc., and the over-all properties of current liquid can't satisfy industrial requirement fully, has limited its widespread use.More academia addresses this problem to adopt dispersion particle is carried out modification at present, improves the electric rheological effect and the stability of current liquid.
Rheologic colloid is the composite elastic object that the rheology particles dispersed is obtained in the gel network of macromolecular compound.Wherein the rheology particle is lockable in parent, stoped the particulate sedimentation, simultaneously the mutual electrostatic interaction that causes because of polarization in electric field of particle makes colloidal visco-elasticity change in electric field again, demonstrates electric rheological effect, and does not in use have leakage, instrument is not had wearing and tearing.The preparation of this material and research more and more are subjected to people's attention.
As the parent of rheologic colloid, investigator's multiselect silica gel anhydrous system similar to the electrorheological fluid parent, this class colloidal preparation time is long, the cost height, and can not in wet environment, produce and use.This paper adopts gelatin/glycerine Aquo System to obtain elastic hydrogel as parent.This colloidal preparation process is simple and direct, with low cost, and can produce in conventional environment and use, and the adding of glycerine, has improved the moisture colloidal elasticity of simple gelatin.
Starch normally is made up of the poly-polysaccharide polymer of chain starch and two kinds of Portugals of starch, exists with particle form, and is water insoluble, and dispersing property is more stable in lower temperature range, and it is again a kind of electric current energy of deformation material preferably simultaneously.Utilization starch can improve the concentration of dispersion particle as disperse phase in compound moisture elasticity rheologic colloid, improves the colloidal adjustability.
Emphatically starch granules and the preparation and the electric rheological effect of the elastic gel of gelatin/glycerin/water composition have been done research in the literary composition.
Expect this can intelligentized ' soft wet part ' material, in fields such as aviation lifesaving and biomedicines good prospects for application is arranged.
Summary of the invention the present invention is scattered in starch granules to have made the moisture electrorheological elastomerics that a kind of mechanical property can be subjected to electric field controls in gelatin/glycerin/water compound system by applying DC electric field, preparation is simple, with low cost, experimental implementation can be carried out at normal temperatures, equipment is not also had particular requirement, and the last handling process of product is realized easily.Particular content of the present invention is as follows:
A certain amount of gelatin in 60～70 ℃ of water that are dissolved in certain volume, is obtained mass percentage concentration and is about 30% aqueous gelatin solution.By finite concentration requirement (wt% starch=0.5,5,10,15,20,25,30,35) weighing insoluble starch, place and the isopyknic glycerine of water, in agate mortar, fully grind, starch is evenly spread in the glycerine, (keeping about 70 ℃ of temperature), add aqueous gelatin solution then, continue to grind, be well-dispersed in glycerine/gelatin Aquo System to starch.Then liquid is transferred to synthetic glass box (40 * 20 * 3mm
3) in, have, no applying direct current electric field (2.0kV/mm, 1 hour) effect gelling down, 25～70 ℃ of temperature.Gelling at room temperature is after 7 hours continuously, takes out blob of viscose, is soaked in respectively in 4% the formalin to carry out the chemical glue connection.With deionized water blob of viscose is washed after 24 hours, soak, three times repeatedly, each 5 minutes, made the moisture composite elastic colloid of starch/gelatin/glycerine.Adopt static Loading Method utilization self-control strain gage, having, the modulus of compression of elastic gel tested under the no electric field action respectively.
Description of drawings
Fig. 1 has (E=2kV/mm) gelling gained colloid under the current field condition at the modulus of compression that has, tests under the no current field condition
Fig. 2 does not have gelling gained colloid under the current field condition at the modulus of compression that has, tests under the no electric field action
The different test of Fig. 3 electric field is to the influence of colloid (wt% starch=25) modulus of compression of gelling gained in electric field (E=2kV/mm)
Embodiment specific implementation process of the present invention and mode are described in detail by following enforcement example and accompanying drawing.
Embodiment one: ((E=2kV/mm) gelling gained colloid under the current field condition being arranged at the modulus of compression that has, tests under the no current field condition)
Will have electric field (E=2kV/mm) effect down the elastic gel of gelling gained have respectively, test its modulus of compression under no electric field (E=1kV/mm) condition, and respectively the starch quality percentage concentration is mapped, as Fig. 1.
Embodiment two: (gelling gained colloid is at the modulus of compression that has, tests under the no electric field action under the no current field condition)
To have respectively at the elastic gel of gelling gained under the no electric field action, its modulus of compression of test under no electric field (E=1kV/mm) condition, and respectively to the mapping of starch quality percentage concentration, as Fig. 2.
Embodiment three: (different test electric fields are to the influence of colloid (wt% starch=25) modulus of compression of gelling gained in electric field (E=2kV/mm))
Starch percentage composition that will gelling obtains under electric field (E=2kV/mm) existence condition is 25% elastic gel, same electric field not (0,1.0,1.25,1.5,1.75,2.0kV/mm) test its modulus of compression, result such as Fig. 3 as the time spent.
Claims (3)
1. moisture composite elastic rheologic colloid of starch/gelatin/glycerine, this material is made up of disperse phase starch and external phase gelatin/glycerin/water, and its principal character is that the process of preparation material makes starch fully disperse the back to make starch be dispersed in the external phase gelling in order to finish by applying the DC electric field effect in aqueous gelatin solution.
2. moisture composite elastic rheologic colloid of starch/gelatin as claimed in claim 1/glycerine, the granular size that it is characterized in that disperse phase starch is 6～14 μ m, mass percentage concentration is 0.5%～35%, external phase is gelatin/glycerin/water, wherein the percentage composition of gelatin in continuous items remains 25%～30%, and the volume ratio of G ﹠ W is 1: 1～1: 1.3.
3. moisture composite elastic rheologic colloid of starch/gelatin as claimed in claim 1/glycerine is characterized in that preparation process may further comprise the steps:
(1) a certain amount of gelatin is obtained 25%～30% aqueous gelatin solution in 60～70 ℃ of water that are dissolved in certain volume, take by weighing insoluble starch by finite concentration requirement (the starch percentage composition is respectively 0.5,5,10,15,20,25,30 and 35%), place and the isopyknic glycerine of water, in agate mortar, fully grind, starch is evenly spread in the glycerine (keep about 70 ℃ of temperature);
(2) aqueous gelatin solution is added in the starch/glycerol, grind 2h, be well-dispersed in gelatin/glycerine Aquo System to starch;
(3) aqueous mixture is transferred to synthetic glass box (40 * 20 * 3mm
3) in, (temperature remains on 25～70 ℃ for 2.0kV/mm, 1h) effect gelling down at applying direct current electric field;
(4) continuously at room temperature behind the gelling 7h, the blob of viscose that obtains is soaked in 4% the formalin and carries out the chemical glue connection, with deionized water blob of viscose is washed behind the 24h, soak, three times repeatedly, each 5min has made the moisture composite elastic rheologic colloid of starch/gelatin/glycerine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101240019A CN100348705C (en) | 2003-07-15 | 2003-12-11 | Starch /gelatin/glycerol aqueous compound elastic current change colloid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN03134397 | 2003-07-15 | ||
| CN03134397.X | 2003-07-15 | ||
| CNB2003101240019A CN100348705C (en) | 2003-07-15 | 2003-12-11 | Starch /gelatin/glycerol aqueous compound elastic current change colloid |
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| Publication Number | Publication Date |
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| CN1576358A true CN1576358A (en) | 2005-02-09 |
| CN100348705C CN100348705C (en) | 2007-11-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102390452A (en) * | 2011-10-17 | 2012-03-28 | 郑州轻工业学院 | Improved electronically-controlled flexible adsorption device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108709811A (en) * | 2018-05-25 | 2018-10-26 | 中国人民解放军陆军装甲兵学院 | Viscoelastic colloidal mechanic property test method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5505871A (en) * | 1993-11-23 | 1996-04-09 | General Atomics | Electrorheological elastomeric composite materials |
| US5412006A (en) * | 1994-03-14 | 1995-05-02 | Dow Corning Corporation | Electrorheological cels and a method for the preparation thereof |
| CN1098343C (en) * | 2000-03-21 | 2003-01-08 | 西北工业大学 | Polysaccharide and inorganic oxide hybridized material as electric vheological liquid and its preparing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102390452A (en) * | 2011-10-17 | 2012-03-28 | 郑州轻工业学院 | Improved electronically-controlled flexible adsorption device |
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