CN1233778C - Process for preparing organic phase change matter/bentonite nanometer composite phase change heat storage material - Google Patents
Process for preparing organic phase change matter/bentonite nanometer composite phase change heat storage material Download PDFInfo
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- CN1233778C CN1233778C CN 01114801 CN01114801A CN1233778C CN 1233778 C CN1233778 C CN 1233778C CN 01114801 CN01114801 CN 01114801 CN 01114801 A CN01114801 A CN 01114801A CN 1233778 C CN1233778 C CN 1233778C
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Abstract
The present invention relates to a method for preparing a nano-composite phase change heat storage building material of organic phase change matter and bentonite. The process comprises the steps that step 1, sodium base bentonite is modified among layers; step 2, an organic phase change heat storage material is embedded into the sodium base bentonite modified among layers; and step 3, a phase change heat storage building material is prepared by (1) preparing a heat storage fibrous plaster board and (2) preparing heat storage cement. The method solves the compatibility and stability problems of the organic phase change heat storage material and the organic phase change heat storage building material in essence and the nano-composite phase change heat storage building material has the advantages of low cost, no toxicity, more varieties, wide phase change temperature range, strong applicability, good heat-conducting property, high heat storage density and no flammability.
Description
The present invention is the preparation method of organic phase-change thing/bentonite nano composite phase change heat-storing building material, belongs to the technology of preparing of heat-storing building material.
Phase-change heat-storage material mainly comprises inorganics (mainly being the hydrate of inorganic salt) and organism (alcohol, acid, ester and aliphatic hydrocarbon) two big classes, although the hydrate phase change heat accumulating transformation temperature of inorganic salt is suitable, latent heat is big and cheap, but because of it has corrodibility and the less employing of strong moisture absorption to material of construction, so, still many with being applied as of organism phase-change heat-storage material.The preparation method of phase change heat-storing building material mainly comprises following two kinds both at home and abroad at present, the one, the organic phase-change heat accumulating is directly mixed with material of construction; The 2nd, adopt infusion method, promptly be will the material of construction matrix to immerse to keep in the liquid phase-change material taking out behind the certain hour, utilize material of construction to have the wicking action that a lot of microvoid structure produces the liquid phase-change heat accumulating is drawn in the matrix of material of construction.The heat-storing building material of these two kinds of method preparations is storing up in (putting) hot operational process for a long time, organic phase change material can leak out and tiny dispersive phase change material (being called " surperficial frosting " phenomenon) occur at building material surface, thereby have a strong impact on the performance of heat-storing building material, make material of construction have flammable problem simultaneously.Phase-change heat-storage material is unlikely to leak out in order to make, and has the investigator to adopt the method for coating polyester film at the heat-storing building material outside surface; Also there is the investigator to carry out organic phase-change heat accumulating and crosslinked high density polyethylene(HDPE) compound earlier, and then join in the material of construction and mix, but because the thermal conductivity of polyester film and crosslinked high density polyethylene(HDPE) is low, influence the heat transfer of phase change material in storage (putting) thermal process, thereby reduced the storage density of material of construction.
Thereby purpose of the present invention is exactly to exist organic phase-change heat-storage material can leak out the performance that has a strong impact on heat-storing building material in the practice process from material of construction and make material of construction have combustibility or the storage of organic phase-change heat accumulating in order to overcome and to solve existing phase change heat-storing building material, shortcoming and problems such as the heat transfer property difference in the exothermic process, the preparation method of research invention a kind of organic phase-change thing/bentonite nano composite phase change heat-storing building material, so that organic phase-change heat accumulating and material of construction consistency are good in the compound heat-storing building material for preparing, when undergoing phase transition, the organic phase-change heat accumulating can not leak out from material of construction, and the good heat-transfer of organic phase-change heat accumulating in storage (putting) thermal process.
The present invention realizes by following proposal: the preparation method of organic phase-change thing/bentonite nano composite phase change heat-storing building material is: (following per-cent all is weight percentage)
The first step: sodium bentonite interlayer modified:
Concentration be the aqueous solution of 5% sodium bentonite under 80～90 ℃ of temperature and agitation condition, drip 30% quaternary ammonium salt aqueous solution of identical weight, suction filtration after 1～2 hour, and be washed till no chlorion and bromide anion (the Silver Nitrate AgNo of usefulness 0.1mol/L with distilled water
3Solution detects does not have precipitation) till, vacuum-drying is ground to 500 purpose modified alta-mud powder to constant weight;
Second step: the organic phase-change heat accumulating is embedded in the sodium bentonite after interlayer modified:
The organic phase-change heat accumulating is heated to fusing fully, add modified alta-mud and water that the first step makes again, high-speed stirring under 80～90 ℃ of temperature, react suction filtration after 12～14 hours, with distilled water wash 2～3 times, carry out vacuum-drying after suction filtration is finished to constant weight, the raw material in this step is formed weight percent and is:
Organic phase-change heat accumulating: 10～20%
Interlayer modified wilkinite: 15～30%
Water: 50～75%
The 3rd step: the preparation of phase change heat-storing building material:
(1) preparation of heat storage type fibrous plaster:
Its raw material is formed and weight percent is:
Gesso 50～64%
Paper fiber 10～25%
Be embedded with the wilkinite 20～25% of phase-change heat-storage material
Other setting accelerator, compound 1～2%
All raw materials are added add water in the mixing machine and mix, to be mixed evenly after, drying and moulding;
(2) preparation of heat accumulation cement:
Its raw material is formed and weight percent is:
Cement 50～60%
River sand and river sand 20～30%
Be embedded with the wilkinite 20～30% of phase-change heat-storage material
All raw materials are added water mix in mixing machine, mix the back and directly use;
The organic phase-change thing of the above-mentioned indication of the present invention comprises: any one in the mixture of n-hexadecane hydrocarbon, Octadecane hydrocarbon, n-butyl stearate, erucic acid, capric acid and stearic mixture, capric acid and Palmiticacid; Quaternary ammonium salt comprises: any one in cetyl trimethylammonium bromide, palmityl trimethyl ammonium chloride, the octadecyl trimethyl ammonium chloride.
Mechanism of the present invention is as follows: wilkinite is the layer silicate mineral (interfloor distance is about 1nm) that a kind of interlayer has exchangable ion, it can be used as material of construction (as plastering, concrete, coating etc.) component or weighting material, utilize wilkinite to have unique laminate structure and ion-exchange performance, by certain method and means, make the organic phase-change heat accumulating be embedded between bentonitic nanometer layer and make organic---inorganic nano combined phase-change heat-storage material, the nano combined phase-change heat-storage material that to prepare is again prepared heat-storing building material as the component or the weighting material of material of construction by the preparation of specification and the requirement of material of construction on this basis.Because organic---not only there is nanometer size effect in inorganic nano combined phase-change heat-storage material, and the specific surface effect is big, interfacial interaction is strong, so, in storage (putting) thermal process, organic phase change material is difficult to from bentonitic nanometer layer de-embedding and comes out, this just the phenomenon that organic phase-change heat-storage material leaks out can not occur from material of construction, do not have the flammability issues of organic phase-change heat-storage material yet.Simultaneously, wilkinite is as a kind of inorganics, and its thermal conductivity is higher relatively, the good heat-transfer of the feasible heat-storing building material of preparing in storage (putting) thermal process, storage density height.
The present invention compared with prior art, have following advantage and beneficial effect: (1) is because organic--and not only there is nanometer size effect in inorganic nano combined phase-change heat-storage material, and the specific surface effect is big, interfacial interaction is strong, so, in storage (putting) thermal process, organic phase change material is difficult to from bentonitic nanometer layer de-embedding and comes out, the consistency and the stability problem of organic phase-change heat accumulating and material of construction will fundamentally be solved, organic phase-change heat-storage material can not occur in building material surface " frosting " phenomenon, can there be flammable problem in the prepared heat-storing building material that goes out yet; (2) the prepared heat-storing building material cost that goes out of the present invention is low, nontoxic, and selectable organic phase-change heat accumulating kind is more, and the transformation temperature scope is wide, suitability is strong; (3) good heat-transfer of the heat-storing building material that the present invention purchased out in storage (putting) thermal process, the storage density height.
Embodiments of the present invention as long as operate by the described preparation method's step of top specification sheets, just can be implemented the present invention preferably.The contriver has a lot of successful embodiment through long term studies and test, only enumerates several embodiment below and is shown in following table 1.
Table 1
Claims (2)
1, the preparation method of a kind of organic phase-change thing/bentonite nano composite phase change heat-storing building material is characterized in that:
The first step: sodium bentonite interlayer modified:
Concentration is that the aqueous solution of 5% sodium bentonite is under 80～90 ℃ of temperature and agitation condition, drip 30% quaternary ammonium salt aqueous solution of identical weight, suction filtration after 1～2 hour, and till being washed till no chlorion and bromide anion with distilled water, vacuum-drying is ground to 500 purpose modified alta-mud powder to constant weight;
Second step: the organic phase-change heat accumulating is embedded in the sodium bentonite after interlayer modified:
The organic phase-change heat accumulating is heated to fusing fully, add modified alta-mud and water that the first step makes again, high-speed stirring under 80～90 ℃ of temperature, react suction filtration after 12～14 hours, with distilled water wash 2～3 times, carry out vacuum-drying after suction filtration is finished to constant weight, the raw material in this step is formed weight percent and is:
Organic phase-change heat accumulating: 10～20%
Interlayer modified wilkinite: 15～30%
Water: 50～75%
The 3rd step: the preparation of phase change heat-storing building material:
(1) preparation of heat storage type fibrous plaster:
Its raw material is formed and weight percent is:
Gesso 50～64%
Paper fiber 10～25%
Be embedded with the wilkinite 20～25% of phase-change heat-storage material
Other setting accelerator, compound 1～2%
All raw materials are added add water in the mixing machine and mix, to be mixed evenly after, drying and moulding;
(2) preparation of heat accumulation cement:
Its raw material is formed and weight percent is:
Cement 50～60%
River sand and river sand 20～30%
Be embedded with the wilkinite 20～30% of phase-change heat-storage material
All raw materials are added water mix in mixing machine, mix the back and directly use;
Described organic phase-change thing comprises any one in the mixture of n-hexadecane hydrocarbon, Octadecane hydrocarbon, n-butyl stearate, erucic acid, capric acid and stearic mixture, capric acid and Palmiticacid.
2, by the preparation method of the described a kind of organic phase-change thing of claim 1/wilkinite composite phase change heat-storing building material, it is characterized in that described quaternary ammonium salt comprises any one in cetyl trimethylammonium bromide, palmityl trimethyl ammonium chloride, the octadecyl trimethyl ammonium chloride.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01114801 CN1233778C (en) | 2001-06-13 | 2001-06-13 | Process for preparing organic phase change matter/bentonite nanometer composite phase change heat storage material |
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| CN 01114801 CN1233778C (en) | 2001-06-13 | 2001-06-13 | Process for preparing organic phase change matter/bentonite nanometer composite phase change heat storage material |
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| CN1233778C true CN1233778C (en) | 2005-12-28 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101870476A (en) * | 2010-05-14 | 2010-10-27 | 淄博联技化工有限公司 | Method for producing temperature-resistant organically modified bentonite |
| CN102535735B (en) * | 2011-07-05 | 2015-03-04 | 江苏尼高科技有限公司 | Preparation method of phase-change energy-storage gypsum wallboard |
| CN104529321B (en) * | 2014-12-08 | 2017-02-22 | 江苏中铁奥莱特新材料股份有限公司 | Layered composite phase change energy storage building material |
| CN107056210A (en) * | 2017-04-01 | 2017-08-18 | 华东理工大学 | A kind of enhanced Thistle board of energy storage, its preparation method and application |
| CN107828385A (en) * | 2017-11-13 | 2018-03-23 | 常州凯途纺织品有限公司 | A kind of solar heat-preservation composite and preparation method thereof |
| CN108373905A (en) * | 2018-02-09 | 2018-08-07 | 苏州甫众塑胶有限公司 | A kind of preparation method of compound high heat conduction phase-changing energy storage material |
| CN108410430A (en) * | 2018-02-26 | 2018-08-17 | 苏州甫众塑胶有限公司 | A kind of preparation method of intelligent building phase-changing energy storage material |
| CN108975831A (en) * | 2018-09-17 | 2018-12-11 | 佛山皖和新能源科技有限公司 | A kind of water proof type cement heat insulating board |
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Assignee: Badefu Industry Co., Ltd. Foshan City Shunde District Assignor: South China University of Technology Contract fulfillment period: 2006.8.31 to 2011.8.31 contract change Contract record no.: 2009440000960 Denomination of invention: Process for preparing organic phase change matter/bentonite nanometer composite phase change heat storage material Granted publication date: 20051228 License type: Exclusive license Record date: 2009.7.29 |
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