CN109342255A - A kind of measuring method of composite phase-change material clad ratio - Google Patents
A kind of measuring method of composite phase-change material clad ratio Download PDFInfo
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- CN109342255A CN109342255A CN201811148193.XA CN201811148193A CN109342255A CN 109342255 A CN109342255 A CN 109342255A CN 201811148193 A CN201811148193 A CN 201811148193A CN 109342255 A CN109342255 A CN 109342255A
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
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Abstract
The present invention relates to detection of construction energy conservation technical field, in particular to a kind of measuring method of composite phase-change material clad ratio carries out as follows: step 1: sampling: weighing the composite phase-change material for test, be denoted as mass M 0；Step 2: preparing test specimen: step 1 acquirement composite phase-change material system is pressed into cylindric, package fat-free filter paper, obtained test specimen；Step 3: primary weighing: test specimen is made in weighing stage 2, is denoted as mass M 1；Step 4: extracting phase transformation core material: using the phase transformation core material in lixiviation process removal test specimen；Step 5: secondary weighing: treated the test specimen of weighing stage 4 is denoted as mass M 2；Step 6: calculating: using formula (M1-M2)/M0, the clad ratio of test specimen is calculated, principle is easily understood, equipment is simple, and convenient test is quick, reduces testing cost, and test result is accurate, can really reflect the storage heat and temperature adjusting performance of composite phase-change material.
Description
Technical field
The present invention relates to detection of construction energy conservation technical field, in particular to a kind of measurement side of composite phase-change material clad ratio
Method.
Background technique
Phase-change material, which refers to, to be varied with temperature and changes state of matter and can provide the substance of latent heat, and phase-change material is in environment
During gradient of temperature, when temperature reaches its phase transition temperature, phase-change material can absorb or discharge heat, and then influence place ring
The temperature change in border, since pure phase-change material is above easy to happen liquate phenomenon in building energy conservation application, so needing phase transformation
Material package or cladding are got up, and obtain composite phase-change material, the key performance of composite phase-change material is storage in application process
Thermal discharge and temperature adjusting performance, and it stores heat and temperature adjusting performance is realized by the characteristic of the phase transformation core material in it, institute
With the height of clad ratio of the phase transformation core material in composite phase-change material can be used for indicating the temperature adjusting performance of composite phase-change material
Superiority and inferiority.
Currently, the measurement of the clad ratio of composite phase-change material generally passes through differential scanning calorimetry, its latent heat of phase change is tested
The adsorbance that phase transformation core material is calculated with the theoretical enthalpy of phase change of phase transformation core material, obtains the clad ratio of composite phase-change material, still, due to
Differential scanning calorimetry sampling amount is few, larger to the randomness of composite phase-change material sampling, measures result and composite phase-change material
Whole storage heat and temperature adjusting performance there are biggish differences, and the clad ratio being calculated cannot be distinguished and come from packet
Internal phase transformation core material is overlayed on, the phase transformation core material for being adhered to composite phase-change material surface is also come from, therefore, it is impossible to true quasi-
The clad ratio of true reflection composite phase-change material, and test method is complicated, test period is long, and it is at high cost, lead to composite phase-change material
Expect that the testing expense of clad ratio is higher.
In conclusion there is an urgent need for a kind of technical solutions at present, the measuring method of existing composite phase-change material clad ratio is solved
The clad ratio of composite phase-change material cannot be really and accurately obtained, and test method is complicated, the higher technical problem of cost.
Summary of the invention
It is an object of the invention to: it cannot really and accurately be obtained for the measuring method of existing composite phase-change material clad ratio
To the clad ratio of composite phase-change material, and test method is complicated, the higher technical problem of cost, and it is multiple to provide a kind of accurate test
Close the measuring method of phase-change material clad ratio.
To achieve the goals above, the technical solution adopted by the present invention are as follows:
A kind of measuring method of composite phase-change material clad ratio carries out as follows: step 1: sampling: weighing for test
Composite phase-change material is denoted as mass M 0；Step 2: preparing test specimen: step 1 acquirement composite phase-change material system is pressed into circle
Column wraps up fat-free filter paper, and test specimen is made；Step 3: primary weighing: test specimen is made in weighing stage 2, is denoted as quality
M1；Step 4: extracting phase transformation core material: using the phase transformation core material in lixiviation process removal test specimen；Step 5: secondary weighing: weighing
Step 4 treated test specimen, is denoted as mass M 2；Step 6: calculating: using formula (M1-M2)/M0, test sample is calculated
The clad ratio of product.
A kind of measuring method of composite phase-change material clad ratio of the invention, the mode by using measured weight difference are accurate
The weight for measuring the phase transformation core material in the test specimen as made from composite phase-change material, easier obtains phase transformation in test specimen
The percentage of core material, and then the clad ratio of composite phase-change material is obtained, principle is easily understood, and equipment is simple, and convenient test is quick,
Testing cost is reduced, the use of laboratory research and development composite phase-change material can be easier applied to, is saved for test research and development
The a large amount of time, simultaneously as the phase transformation core material in test specimen is sufficiently eliminated by lixiviation process, so that without the concern for survey
The clad ratio obtained, which comes from, is coated on internal phase transformation core material, also comes from the phase transformation for being adhered to composite phase-change material surface
Core material enables determination data more really to reflect the storage heat and temperature adjusting performance of composite phase-change material, keeps test result more quasi-
Really.
Preferably, the step 1 is sampled using quartering.It is sampled using quartering, makes the test obtained
Sample can really reflect the whole storage heat and temperature adjusting performance of composite phase-change material, further make test result more acurrate.
Preferably, being additionally provided with pre-treatment step before the step 1: composite phase-change material is rinsed, it is viscous to remove
It is attached to the phase transformation core material on composite phase-change material surface.Setting pre-treatment step carries out composite phase-change material anti-before step 1
Multiple to rinse, removal is adhered to the phase transformation core material on composite phase-change material surface, so that the clad ratio result measured is both from cladding
Phase transformation core material inside composite phase-change material can be surveyed using measuring method according to the actual situation so that test result is more accurate
The cladding that the clad ratio result of the composite phase-change material rinsed obtained is measured with the composite phase-change material not being rinsed
Rate result compares test, is compared obtained clad ratio result by comparative test, makes to further clarify and is adhered to
Influence of the phase transformation core material on composite phase-change material surface to composite phase-change material integral coating rate, and then obtain more accurately measuring
As a result, making measuring method of the invention not only has the beneficial effect of convenient, fast, accurate measurement composite phase-change material clad ratio
Fruit also has the phase transformation core material for obtaining being adhered to composite phase-change material surface to composite phase-change material clad ratio effect
Beneficial effect.
Preferably, the step 2 prepares columned test specimen using sample preparation mechanism, in the sample preparation mechanism
It is provided with the sample preparation chamber with test specimen size fit.Test specimen is carried out shaping using sample preparation mechanism, facilitates test sample
The test of product.
Preferably, the sample preparation mechanism includes pedestal, sample preparation cylinder and stamp stem, sample preparation chamber is arranged in sample preparation cylinder
It is interior, the breather chamber being adapted to pedestal, the breather chamber and sample preparation chamber are additionally provided in the sample preparation cylinder, in sample preparation circle
It is additionally provided with the orifice plate for separating breather chamber and sample preparation chamber in cylinder, is provided with several ventholes on the orifice plate.Sampling machine
Structure structure is simple, and use is more convenient, makes that composite phase-change material is easier carried out shaping processing, convenient to composite phase-change material
Test specimen obtained is tested.
Preferably, the step 2 includes the following steps: step 2.1: the assembling of sample preparation mechanism part: sample preparation cylinder being put
It sets on pedestal, is put into orifice plate in sample preparation chamber；Step 2.2: installation pressure-bearing filter paper: being laid with fat-free filter paper on orifice plate, leads to
It crosses stamp stem and is bonded fat-free filter paper closely with orifice plate；Step 2.3: the composite phase-change material after step 1 weighing material feeding: being poured into system
In sample chamber；Step 2.4: placing covering filter paper: being laid with fat-free filter paper on composite phase-change material, by stamp stem by fat-free filter paper
It is bonded with composite phase-change material closely；Step 2.5: tamping composite phase-change material, molded test sample tamping: being pressed by stamp stem
Product.It is limited between indoor two fat-free filter papers of sample preparation chamber using by composite phase-change material, on the one hand makes test specimen system
Be not in the case where composite phase-change material distributes during standby, keep determination data accurate, on the other hand, also conveniently makes obtained
Columned test specimen is limited by fat-free filter paper, it is not easy to be dispersed, be facilitated the progress of subsequent test.
Preferably, the fat-free filter paper is middling speed quantitative filter paper.
Preferably, the lixiviation process includes soxhlet extraction, the soxhlet extraction is to be gasified using Soxhlet extractor
The method of solvent dissolved material.Phase transformation core material in composite phase-change material is leached using Soxhlet extractor, operation is simpler, can be complete
Phase transformation core material in full removal composite phase-change material, further test is simpler, and test result is more accurate.
Preferably, the solvent is adapted to phase transformation core material, the solvent has the characteristic by thermal evaporation cooling condensation,
The solvent can dissolve the phase transformation core material in composite phase-change material.According to the actual constituent of phase transformation core material in composite phase-change material,
Solvent is adjusted, solvent is made, by thermal evaporation, sufficiently in leaching composite phase-change material phase transformation core material, to make phase transformation in Soxhlet extractor
Core material removes more thoroughly, and test result is further enable really to reflect the clad ratio of composite phase-change material.
In conclusion by adopting the above-described technical solution, a kind of measurement of composite phase-change material clad ratio of the invention
The beneficial effect of method is:
1, the phase transformation core in the test specimen as made from composite phase-change material is accurately measured by using the mode of measured weight difference
The weight of material, easier obtains the percentage of phase transformation core material in test specimen, and then obtains the clad ratio of composite phase-change material,
Principle is easily understood, and equipment is simple, and convenient test is quick, reduces testing cost, can easier apply to laboratory research and development
The use of composite phase-change material saves a large amount of time for test research and development；
2, due to sufficiently eliminating the phase transformation core material in test specimen by lixiviation process, so that without the concern for the clad ratio measured
It comes from and is coated on internal phase transformation core material, also come from the phase transformation core material for being adhered to composite phase-change material surface, make to survey
Fixed number keeps test result more acurrate according to the storage heat and temperature adjusting performance that can more really reflect composite phase-change material.
Detailed description of the invention
Fig. 1 is a kind of flow diagram of the measuring method of composite phase-change material clad ratio of the invention；
Fig. 2 is a kind of flow diagram of the measuring method of composite phase-change material clad ratio of embodiment 2；
Fig. 3 is the structural schematic diagram of heretofore described Soxhlet extractor；
Fig. 4 is the structural schematic diagram of sample preparation mechanism described in embodiment 3；
Fig. 5 is the structural schematic diagram of sample preparation mechanism use state described in embodiment 3；
Fig. 6 is the flow diagram of step 2 described in embodiment 3.
Appended drawing reference
1- pedestal, 2- sample preparation cylinder, 21- sample preparation chamber, 22- breather chamber, 3- stamp stem, 4- orifice plate, 41- venthole, 5- degreasing filter
Paper, 6- extraction tube, 7- condenser, 8- extraction flask, 9- siphon pipe, 10- test specimen.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing and specific implementation
Example, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only to explain this hair
It is bright, it is not intended to limit the present invention.
Embodiment 1
As shown in Figs. 1-2, a kind of measuring method of composite phase-change material clad ratio carries out as follows: step 1: sampling: claiming
The composite phase-change material in test is taken, mass M 0 is denoted as；Step 2: preparing test specimen: step 1 is obtained into composite phase-change material
Material system is pressed into cylindric, package fat-free filter paper, obtained test specimen 10；Step 3: primary weighing: test is made in weighing stage 2
Sample 10 is denoted as mass M 1；Step 4: extracting phase transformation core material: using the phase transformation core material in lixiviation process removal test specimen；Step
5: secondary weighing: treated the test specimen 10 of weighing stage 4 is denoted as mass M 2；Step 6: calculate: using formula (M1-M2)/
The clad ratio of test specimen 10 is calculated in M0.
The measuring method of a kind of composite phase-change material clad ratio of the present embodiment, by using the mode essence of measured weight difference
The weight ratio for really measuring the phase transformation core material in composite phase-change material, obtains the clad ratio of composite phase-change material, principle is simply easy
Understand, equipment is simple, and convenient test is quick, and data measured is accurate, can really reflect composite phase-change material storage heat and
Temperature adjusting performance is conducive to test promoting the use in R&D process, and the scope of application is wider, wherein the mass M 0 is to contain
The total weight of the composite phase-change material of phase transformation core material, the mass M 1 not only include the total of the composite phase-change material of phase transformation core material
Weight further comprises the weight of the fat-free filter paper and additional constraint rope for covered composite yarn phase-change material, the mass M 2
Remaining gross mass can be obtained composite phase-change material and extracted phase transformation using M1-M2 after having extracted phase transformation core material for test specimen
Weight difference before and after core material, that is, the weight for the phase transformation core material being extracted, namely obtain the composite phase-change material of initial sample weighing
The weight of middle phase transformation core material, then divided by the total weight of initial weighed composite phase-change material, easier obtain phase transformation core material and exist
Weight ratio in composite phase-change material obtains the clad ratio of composite phase-change material.
Preferably, the step 1 is sampled using quartering, and the step 2 prepares cylinder using the compacting of sample preparation mechanism
The test specimen 10 of shape is provided with the sample preparation chamber with 10 size fit of test specimen, the lixiviation process in the sample preparation mechanism
Including soxhlet extraction, the soxhlet extraction be using Soxhlet extractor vaporized solvent dissolved material method, described four points
Method is to divide equally sample after four parts a copy of it is taken to divide equally four parts again, repeats to divide equally the operation for taking one, conform to until obtaining
The sample of quality or volume is sought, compound phase can also be carried out using other containers according to the shape and material of composite phase-change material
Become the circulation immersion and solid-liquid separation treatment of material, realizes the extracting to phase transformation core material in composite phase-change material.
The present embodiment is using being provided with for composite phase-change material of the paraffin as phase transformation core material, using dissolvable paraffin
For organic solvent as solvent, the present embodiment preferably uses n-hexane as organic solvent, carries out clad ratio by this measuring method
The weight 1g that test, first sampling weigh the composite phase-change material for test, is accurate to 0.001g, is denoted as M0, and examination is made
Sample is tested, is weighed again, 0.001g is accurate to, is denoted as mass M 1, the M1 of this test is 6.892g, and test specimen 10 is placed
Into the extraction tube 6 of Soxhlet extractor, organic solvent is injected in the extraction flask 8 of Soxhlet extractor, the organic solvent of injection
Amount is about the 1/2 of 8 volume of extraction flask, and the present embodiment preferably uses original place flask as extraction flask 8, and heating extraction bottle 8 makes organic
Solvent gasification rises in the condenser 7 of Soxhlet extractor and congeals into liquid instillation extraction tube 6, in Leaching tests sample 10
Paraffin, when organic solvent liquid level reach a certain height in extraction tube 6, dissolved with rainbow of the organic solvent Jing Guo Soxhlet extractor of paraffin
Suction pipe 9 passes back into extraction flask 8, continues to be heated gasification ascending into extraction tube 6, loops back and forth like this, and repeatedly impregnates point
From rear, until extracting finishes, leaching can be increased by adjusting extraction times are extended according to the amount of test specimen according to the actual situation
Number is mentioned, is thoroughly extracted with the phase transformation core material ensured in composite phase-change material, guarantees the accurate of measurement result, extracting finishes
Afterwards, test specimen is taken out, places in air, organic solvent is made to volatilize naturally, until the outer layer fat-free filter paper of test specimen 10 is dry
After dry, carry out secondary weighing test specimen, be denoted as mass M 2, this test M2 be 6.2335g, further according to formula (M1-M2)/
M0, the clad ratio with paraffin composite phase change material that this sub-sampling is calculated is 65.85%.
Embodiment 2
As shown in Figure 1-3, a kind of measuring method of composite phase-change material clad ratio of the present embodiment, testing process and embodiment 1
Identical, difference is: being additionally provided with pre-treatment step before the step 1: rinsing composite phase-change material, be adhered to remove
The phase transformation core material on composite phase-change material surface.
The measuring method of a kind of composite phase-change material clad ratio of the present embodiment, by the way that pretreatment is arranged before step 1
Step carries out repeated flushing to composite phase-change material, and removal is adhered to the phase transformation core material on composite phase-change material surface, so that measuring
Clad ratio result both from the phase transformation core material being coated on inside composite phase-change material so that test result is more accurate, this reality
It applies example preferably while carrying out two groups of tests, wherein one group of test uses the composite phase-change material without flushing, another group of test
Using the composite phase-change material by rinsing, the clad ratio of composite phase-change material is measured according to measuring method as a result, by two groups of surveys
Test result compares test, by the test result of comparative determination, easier obtains being adhered to composite phase-change material surface
Influence of the phase transformation core material to composite phase-change material integral coating rate, make measuring method of the invention not only and have it is convenient, fast,
The beneficial effect of accurate measurement composite phase-change material clad ratio, also has the phase transformation core for obtaining being adhered to composite phase-change material surface
Beneficial effect of the material to composite phase-change material clad ratio influence degree.
Embodiment 3
As shown in figures 1 to 6, the measuring method of a kind of composite phase-change material clad ratio of the present embodiment, testing process and embodiment 1
Identical, difference is: the sample preparation mechanism includes pedestal 1, sample preparation cylinder 2 and stamp stem 3, and sample preparation chamber 21 is arranged in sample preparation cylinder
In 2, the breather chamber 22 being adapted to pedestal 1 is additionally provided in the sample preparation cylinder 2, the breather chamber 22 connects with sample preparation chamber 21
It is logical, it is additionally provided with the orifice plate 4 for separating breather chamber 22 and sample preparation chamber 21 in sample preparation cylinder 2, is provided on the orifice plate 4
Several ventholes 41, on the basis of using the sample preparation mechanism of the structure, the step 2 includes the following steps: step 2.1: system
The assembling of sample mechanism part: sample preparation cylinder 2 is placed on pedestal 1, orifice plate 4 is put into sample preparation chamber 21；Step 2.2: installation
Pressure-bearing filter paper: it is laid with fat-free filter paper 5 on orifice plate 4, is bonded fat-free filter paper 5 closely with orifice plate 4 by stamp stem 3；Step 2.3:
Material feeding: the composite phase-change material after step 1 weighing is poured into sample preparation chamber 21；Step 2.4: placing covering filter paper: compound
It is laid with fat-free filter paper 5 on phase-change material, is bonded fat-free filter paper 5 closely with composite phase-change material by stamp stem 3；Step 2.5: smashing
It is real: tamping composite phase-change material, molded test specimen 10 are pressed by stamp stem 3.
A kind of measuring method of composite phase-change material clad ratio of the present embodiment will by using specific sample preparation mechanism
Composite phase-change material is limited between two fat-free filter papers 5 in the sample preparation chamber 21 of sample preparation mechanism, on the one hand makes test sample
Be not in the case where composite phase-change material distributes in 10 preparation process of product, keep determination data accurate, on the other hand, also conveniently makes
Columned test specimen 10 obtained is limited by fat-free filter paper 5, it is not easy to disperse, facilitate it is subsequent in Soxhlet extractor into
The extraction of row phase transformation core material.
Above embodiments are only to illustrate the present invention and not limit the technical scheme described by the invention, although this explanation
The present invention has been described in detail referring to the above embodiments for book, but the present invention is not limited to above-mentioned specific embodiment party
Formula, therefore any couple of present invention modifies or equivalent replacement, and the technical solution of all spirit and scope for not departing from invention
And its improve, it should all cover within the scope of the claims of the present invention.
Claims (9)
1. a kind of measuring method of composite phase-change material clad ratio, it is characterised in that: carry out as follows:
Step 1: sampling: weighing the composite phase-change material for test, be denoted as mass M 0；
Step 2: preparing test specimen: step 1 acquirement composite phase-change material system is pressed into cylindric, package fat-free filter paper, system
Obtain test specimen；
Step 3: primary weighing: test specimen is made in weighing stage 2, is denoted as mass M 1；
Step 4: extracting phase transformation core material: using the phase transformation core material in lixiviation process removal test specimen；
Step 5: secondary weighing: treated the test specimen of weighing stage 4 is denoted as mass M 2；
Step 6: calculating: using formula (M1-M2)/M0, the clad ratio of test specimen is calculated.
2. measuring method as described in claim 1, it is characterised in that: the step 1 is sampled using quartering.
3. measuring method as described in claim 1, it is characterised in that: be additionally provided with rinsing step before the step 1: rinsing
Composite phase-change material, to remove the phase transformation core material for being adhered to composite phase-change material surface.
4. measuring method as described in claim 1, it is characterised in that: the step 2 prepares cylinder using the compacting of sample preparation mechanism
The test specimen of shape is provided with the sample preparation chamber with test specimen size fit in the sample preparation mechanism.
5. measuring method as claimed in claim 4, it is characterised in that: the sample preparation mechanism includes pedestal, sample preparation cylinder and smashes
Bar, sample preparation chamber are arranged in sample preparation cylinder, and the breather chamber being adapted to pedestal, the ventilation are additionally provided in the sample preparation cylinder
Room and sample preparation chamber, are additionally provided with the orifice plate for separating breather chamber and sample preparation chamber, the orifice plate in sample preparation cylinder
On be provided with several ventholes.
6. measuring method as claimed in claim 5, it is characterised in that: the step 2 includes the following steps:
Step 2.1: the assembling of sample preparation mechanism part: sample preparation cylinder being placed on pedestal, is put into orifice plate in sample preparation chamber；
Step 2.2: installation pressure-bearing filter paper: being laid with fat-free filter paper on orifice plate, be bonded fat-free filter paper tightly with orifice plate by stamp stem
It is close；
Step 2.3: material feeding: the composite phase-change material after step 1 weighing being poured into sample preparation chamber；
Step 2.4: placing covering filter paper: being laid with fat-free filter paper on composite phase-change material, by stamp stem by fat-free filter paper and again
It is close to close phase-change material fitting；
Step 2.5: tamping composite phase-change material, molded test specimen tamping: being pressed by stamp stem.
7. measuring method as claimed in claim 6, it is characterised in that: the fat-free filter paper is middling speed quantitative filter paper.
8. the measuring method as described in claim 1-7 any one, it is characterised in that: the lixiviation process includes Soxhlet extraction
Method, the soxhlet extraction are the method using Soxhlet extractor vaporized solvent dissolved material.
9. measuring method as claimed in claim 8, it is characterised in that: the solvent is adapted to phase transformation core material, the solvent tool
There is the characteristic by thermal evaporation cooling condensation, the solvent can dissolve the phase transformation core material in composite phase-change material.
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