CN105950110A - Novel shear thickening solution based on silica solid substrate - Google Patents
Novel shear thickening solution based on silica solid substrate Download PDFInfo
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- CN105950110A CN105950110A CN201610297451.5A CN201610297451A CN105950110A CN 105950110 A CN105950110 A CN 105950110A CN 201610297451 A CN201610297451 A CN 201610297451A CN 105950110 A CN105950110 A CN 105950110A
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Abstract
The invention provides a novel shear thickening solution based on a silica solid substrate. The novel shear thickening solution comprises: silica powder, polyethylene glycol and N-(Rho-aminoethyl)-gamma aminopropyltrimethoxysilane. The novel shear thickening solution based on the silica solid substrate provided by the invention has the advantages of easily available raw materials, convenient processing, and relatively low cost.
Description
Technical field
The present invention relates to material engineering field, be specifically related to a kind of novel shearing thickening solution based on silica solid base material.
Background technology
" STF " (Shear Thickening Fluid, it is called for short STF) it is kind of a novel functional material, it exists under normal state in fluid form, but when it is acted on by impulsive force, its apparent viscosity will increase drastically, can present as solid, have good impact resistance, after impulsive force quickly disappears, can relatively rapidly return to again original state.Therefore, this solution is otherwise known as " solid-liquid two phase liquid ".
Whether " STF " is initially that US military designs for flak jackets, and its most famous formula is nanometer grade silica base material+polyglycol solution, but also have other additive or special processing process the most unknown.Practical operation through applicant, it was demonstrated that in the case of the both stocks only using US military to propose carry out simple physical mixing, solution can not reach intended shear thickening effect.
China is domestic also some novel shearing thickening fluid formula or processing technique patents of processing technique patent, such as Application No. 201410009134.x.But these patents are typically passed through extremely complex processing technique (deaeration or other volatile material under such as Ultrasonic machining, vacuum condition), and cost is the highest, once production technology slightly deviation, it is possible to causes and processes unsuccessfully.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, propose a kind of novel shearing thickening solution based on silica solid base material.
Novel shearing thickening solution based on silica solid base material includes: SiO 2 powder, Polyethylene Glycol and N-(ρ-aminoethyl)-γ-aminopropyltrimethoxysilane；The quality of wherein said SiO 2 powder accounts for the 13%-46% of novel shearing thickening solution gross mass, the quality of 48%-85.8%, described N-(ρ-aminoethyl)-γ-aminopropyltrimethoxysilane that the quality of described Polyethylene Glycol accounts for novel shearing thickening solution gross mass accounts for the 1.2%-6.0% of novel shearing thickening solution gross mass.
Described SiO 2 powder is usually nanometer fineness SiO 2 powder.
Preferably, described SiO 2 powder includes 200nm fineness SiO 2 powder.
Preferably, described Polyethylene Glycol includes polyethylene glycol 200 (i.e. molecular weight is the Polyethylene Glycol of 200).
Compared with prior art, the method have the advantages that
1, based on silica solid base material the novel shearing thickening solution that the present invention provides, can be used for military project or civil area, for preventing high speed missile to human body, equipment, the destruction of building.
2, based on silica solid base material the novel shearing thickening solution that the present invention provides, it is made up of solid particle and base fluid, solid-liquid two phase liquid when bearing high-speed impact due between solid particle power have little time propagate, cause friction force huge between solid particle, the instantaneous characteristic presenting solid, the kinetic energy making rammer is converted into the interior energy of this solution, thus absorbs the energy of high-speed impact.After this solution instantaneous solidification, there is extremely strong penetration-resistant.Owing to its moment presents the performance of solid property, it is referred to alternatively as again " solid-liquid two phase liquid ".
3, based on silica solid base material the novel shearing thickening solution that the present invention provides, use SiO 2 powder as solid substrate, use Polyethylene Glycol as liquid base, use N-(ρ-aminoethyl)-γ-aminopropyltrimethoxysilane as dispersant.Material used is readily available, the least to human body toxic and side effects, can be generated by General Physics processing, it is simple to commercial introduction.
4, based on silica solid base material the novel shearing thickening solution that the present invention provides, material easily obtains, easy to process, relative inexpensiveness.
Detailed description of the invention
Inventor, according to the investigation to U.S.'s STF, learns that it uses SiO 2 powder and Polyethylene Glycol bi-material.Through overtesting, it was demonstrated that only using both materials, when SiO 2 powder mass concentration not up to 15%, solution just enters the state of not re-dissolved, it is impossible to continues processing, also cannot embody shear thickening effect.Improve processing method, use double-planet ball milling, ultrasonic cleaning method that mass fraction is increased to more than 20% further, still cannot embody shear thickening effect.
For solving this problem, inventor has attempted the various additive of addition, including setting agent (sodium bromate), stabilizer (dibutyl tin laurate), fire retardant (sodium silicate), dispersant (N-(ρ-aminoethyl)-γ-aminopropyltrimethoxysilane), wherein setting agent, stabilizer, fire retardant all do not play a role in improving, fire retardant even causes the solidification of solution, and only dispersant N-(ρ-aminoethyl)-γ-aminopropyltrimethoxysilane serves preferably effect.
The present embodiment provides a kind of novel shearing thickening solution based on silica solid base material, including: the SiO 2 powder of mass fraction 20%20nm fineness, mass fraction 76.2% Polyethylene Glycol and mass fraction 3.8%N-(ρ-aminoethyl)-γ-aminopropyltrimethoxysilane.Wherein Polyethylene Glycol includes but not limited to that polyethylene glycol 200, N-(ρ-aminoethyl)-γ-aminopropyltrimethoxysilane play dispersant effect in the solution.
The processing method such as paddling process, extruding (rubbing pressure) method, ultrasonic cleaning method, double-planet ball-milling method can be used to process above-mentioned novel shearing thickening solution based on silica solid base material.Only use paddling process, extruding this simple artificial physics processing method of (rubbing pressure) method can also reach good processing effect, but inefficient, in order to stir, need longer process time.Ultrasonic cleaning method, double-planet ball-milling method are the two kinds of machining process attempted, and efficiency is higher.If pressed powder large usage quantity in solution, being difficult to stir or during machining, can first use extruding (rubbing pressure) method, be extruded by rubbing repeatedly, make various materials in solution be sufficiently mixed, change other processing method again after reaching certain dissolubility, can reach preferable processing effect.
For evaluating the shock resistance effect of solution, devise impact test stand, by the standardized impact thing fallen from differing heights, on impact solution in beaker, by the solution backward acceleration to alluvium, the shock resistance effect of solution can be passed judgment on.
Under various height, alluvium is as shown in the table by the average backward acceleration of typical proportioning solution (20% mass fraction silicon dioxide, 3.8%N-(ρ-aminoethyl)-γ-aminopropyltrimethoxysilane):
Typical proportion Polyethylene Glycol+silicon dioxde solution Impulse Test Result statistical table
* 1:g is acceleration of gravity.
Keep silicon dioxide quality mark 20%, adjust N-(ρ-aminoethyl)-γ-aminopropyltrimethoxysilane consumption, when consumption 1.3%, 4m dropping shock backward acceleration-33.36g, solution is the most sticky, continues to reduce consumption and is then difficult to stirring and processing, the dry powder that cannot dissolve occurs；When consumption reaches 5.9%, 4m dropping shock backward acceleration-22.55g, some is the dilutest for solution；When consumption reaches 8%, solution is the dilutest, and beaker is smashed.Considering to reach the acceleration of-20g as acceptance index using 4m impact, and consider machinability, the consumption of N-(ρ-aminoethyl)-γ-aminopropyltrimethoxysilane is preferably between 1.2-6.0%.
Keeping N-(ρ-aminoethyl)-γ-aminopropyltrimethoxysilane consumption is 3.8%, adjusts silicon dioxide quality mark, and when being taken as 8%, solution is the dilutest, and almost without shear thickening effect, beaker is smashed；When being taken as 14%, solution is the dilutest, 4m dropping shock backward acceleration-23.76g；When being taken as 45%, solution is feeding-up, 4m dropping shock backward acceleration-37.43g, but continues to increase concentration and be difficult to stirring and processing, the dry powder that cannot dissolve occurs.Considering to reach the acceleration of-20g as acceptance index using 4m impact, and consider machinability, silicon dioxide quality mark is preferably between 13%-46%.
Compared with prior art, the present embodiment has the advantages that
1, based on silica solid base material the novel shearing thickening solution that the present embodiment provides, can be used for military project or civil area, for preventing high speed missile to human body, equipment, the destruction of building.
2, based on silica solid base material the novel shearing thickening solution that the present embodiment provides, it is made up of solid particle and base fluid, solid-liquid two phase liquid when bearing high-speed impact due between solid particle power have little time propagate, cause friction force huge between solid particle, the instantaneous characteristic presenting solid, the kinetic energy making rammer is converted into the interior energy of this solution, thus absorbs the energy of high-speed impact.After this solution instantaneous solidification, there is extremely strong penetration-resistant.Owing to its moment presents the performance of solid property, it is referred to alternatively as again " solid-liquid two phase liquid ".
3, based on silica solid base material the novel shearing thickening solution that the present embodiment provides, use SiO 2 powder as solid substrate, use Polyethylene Glycol as liquid base, use N-(ρ-aminoethyl)-γ-aminopropyltrimethoxysilane as dispersant.Material used is readily available, the least to human body toxic and side effects, can be generated by General Physics processing, it is simple to commercial introduction.
4, based on silica solid base material the novel shearing thickening solution that the present embodiment provides, compare the novel shearing thickening fluid formula that more domestic processing technique are complicated, with high costs, this solution material easily obtains, (simple physical agitation) easy to process, need not special facility or the equipments such as vacuum chamber, relative inexpensiveness.
Claims (4)
1. a novel shearing thickening solution based on silica solid base material, it is characterised in that including:
SiO 2 powder, Polyethylene Glycol and N-(ρ-aminoethyl)-γ-aminopropyltrimethoxysilane；Wherein said
The quality of SiO 2 powder accounts for the 13%-46% of novel shearing thickening solution gross mass, the matter of described Polyethylene Glycol
Amount accounts for 48%-85.8%, described N-(ρ-aminoethyl)-γ-aminopropyl three of novel shearing thickening solution gross mass
The quality of methoxy silane accounts for the 1.2%-6.0% of novel shearing thickening solution gross mass.
2. novel shearing thickening solution based on silica solid base material as claimed in claim 1, it is special
Levying and be, described SiO 2 powder includes nanometer fineness SiO 2 powder.
3. novel shearing thickening solution based on silica solid base material as claimed in claim 2, it is special
Levying and be, described SiO 2 powder includes 200nm fineness SiO 2 powder.
4. novel shearing thickening solution based on silica solid base material as claimed in claim 1, it is special
Levying and be, described Polyethylene Glycol includes polyethylene glycol 200.
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| CN201610297451.5A CN105950110A (en) | 2016-05-06 | 2016-05-06 | Novel shear thickening solution based on silica solid substrate |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106916433A (en) * | 2017-03-16 | 2017-07-04 | 南昌航空大学 | A kind of preparation method of high impact properties STF |
| CN107502288A (en) * | 2017-08-28 | 2017-12-22 | 湖南沃美新材料科技有限公司 | A kind of preparation method of nano silicon STF |
| CN107558228A (en) * | 2017-08-22 | 2018-01-09 | 湖南沃美新材料科技有限公司 | A kind of method for preparing STF |
| CN112920640A (en) * | 2020-12-25 | 2021-06-08 | 湘潭大学 | Shear thickening fluid, paint, preparation method thereof and application of paint |
| CN115179636A (en) * | 2022-06-17 | 2022-10-14 | 东莞井上建上汽车部件有限公司 | Automobile battery heat shield and processing technology thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103359740A (en) * | 2012-03-27 | 2013-10-23 | 浩华科技实业有限公司 | Preparation method of silica shear thickening liquid |
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2016
- 2016-05-06 CN CN201610297451.5A patent/CN105950110A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103359740A (en) * | 2012-03-27 | 2013-10-23 | 浩华科技实业有限公司 | Preparation method of silica shear thickening liquid |
Non-Patent Citations (3)
| Title |
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| 徐素鹏，等: "纳米SiO2-聚乙二醇分散体系的分散性及流变行为研究", 《北京服装学院学报(自然科学版)》 * |
| 徐素鹏: "不同配制方法下剪切增稠液体的性能表征", 《硅酸盐通报》 * |
| 王蒙，等: "剪切增稠液体流变性能研究及STF复合膜材料的展望", 《第十五届全国现代结构工程学术研讨会论文集》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106916433A (en) * | 2017-03-16 | 2017-07-04 | 南昌航空大学 | A kind of preparation method of high impact properties STF |
| CN107558228A (en) * | 2017-08-22 | 2018-01-09 | 湖南沃美新材料科技有限公司 | A kind of method for preparing STF |
| CN107558228B (en) * | 2017-08-22 | 2021-03-02 | 湖南御邦华安新材料科技有限公司 | Method for preparing shear thickening liquid |
| CN107502288A (en) * | 2017-08-28 | 2017-12-22 | 湖南沃美新材料科技有限公司 | A kind of preparation method of nano silicon STF |
| CN112920640A (en) * | 2020-12-25 | 2021-06-08 | 湘潭大学 | Shear thickening fluid, paint, preparation method thereof and application of paint |
| CN115179636A (en) * | 2022-06-17 | 2022-10-14 | 东莞井上建上汽车部件有限公司 | Automobile battery heat shield and processing technology thereof |
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Application publication date: 20160921 |