CN115343457A - Antibacterial long-acting performance test method and application - Google Patents
Antibacterial long-acting performance test method and application Download PDFInfo
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- CN115343457A CN115343457A CN202211137001.1A CN202211137001A CN115343457A CN 115343457 A CN115343457 A CN 115343457A CN 202211137001 A CN202211137001 A CN 202211137001A CN 115343457 A CN115343457 A CN 115343457A
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- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 109
- 238000000034 method Methods 0.000 title claims description 25
- 238000011056 performance test Methods 0.000 title claims description 5
- 238000012360 testing method Methods 0.000 claims abstract description 70
- FOIXSVOLVBLSDH-UHFFFAOYSA-N Silver ion Chemical compound [Ag+] FOIXSVOLVBLSDH-UHFFFAOYSA-N 0.000 claims abstract description 53
- 229920001155 polypropylene Polymers 0.000 claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000010998 test method Methods 0.000 claims abstract description 13
- 239000004033 plastic Substances 0.000 claims abstract description 8
- 229920003023 plastic Polymers 0.000 claims abstract description 8
- 238000012797 qualification Methods 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 26
- 239000011347 resin Substances 0.000 claims description 14
- 229920005989 resin Polymers 0.000 claims description 14
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 12
- 230000007774 longterm Effects 0.000 claims description 12
- 235000012431 wafers Nutrition 0.000 claims description 10
- 241000191967 Staphylococcus aureus Species 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 5
- 230000001580 bacterial effect Effects 0.000 claims description 4
- 238000003321 atomic absorption spectrophotometry Methods 0.000 claims description 2
- 230000000845 anti-microbial effect Effects 0.000 claims 2
- 241000894007 species Species 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000003242 anti bacterial agent Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 241000588724 Escherichia coli Species 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- -1 silver ions Chemical class 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000003385 bacteriostatic effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/44—Resins; Plastics; Rubber; Leather
- G01N33/442—Resins; Plastics
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/3103—Atomic absorption analysis
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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- Analytical Chemistry (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention relates to the technical field of plastic antibacterial performance detection, in particular to an antibacterial long-acting test method and application thereof, wherein samples to be tested in the same batch are subjected to water bath in a hot water (95 ℃) environment, the antibacterial rate and the silver ion content of the samples in each water bath time period are measured, a prediction curve is drawn according to data, corresponding antibacterial rate and silver ion content data at 50 years are found, the qualification rate is judged according to the antibacterial rate and the silver ion content judgment standard, and the antibacterial qualification rate of a PP-R pipe in the service life is further evaluated. Compared with the prior art, the antibacterial test adopts a short-time test, the test in a short time after the PP-R pipe is manufactured can only reflect the antibacterial effect of the PP-R pipe on the test time node, the service life of the PP-R pipe is more than or equal to 50 years, and the antibacterial effect of the short-time test in the whole service life period of the PP-R pipe is extremely inaccurate.
Description
Technical Field
The invention relates to the technical field of plastic antibacterial performance detection, in particular to an antibacterial long-acting testing method and application.
Background
The PP-R pipe is a novel plastic pipeline product developed and applied in the early 90 th European age, and has better impact resistance and long-term creep property. In recent years, the composite material is rapidly developed due to environmental protection, not only has light weight and high cost performance and is easy to install, but also is widely applied to various fields such as chemical industry, buildings, medicines and the like.
People not only meet the advantages of long service life, no scaling and the like of the PP-R pipeline system, but also put forward higher requirements, namely the pipeline has antibacterial and bacteriostatic properties so as to remove bacteria harmful to human bodies in the whole pipeline system, particularly the inhibiting effect on escherichia coli and staphylococcus aureus.
Chinese patent application No. 200810203019.0 discloses a PP-R antibacterial pipe material, which comprises a PP-R outer layer and a PP-R antibacterial inner layer, wherein the PP-R antibacterial inner layer is formed by mixing PP-R resin, an inorganic antibacterial agent and color master, and the weight parts of the PP-R resin and the inorganic antibacterial agent are as follows: 100: 2-3; the inorganic antibacterial agent is Ag + 、Cu 2+ 、Zn 2+ One or more of (a).
Besides the related structure and composition of the PP-R antibacterial pipe, the specification also discloses a method for testing the inhibition rate of the PP-R antibacterial pipe on escherichia coli and staphylococcus aureus and related data, and the test time nodes are all 18 hours later.
The problems can be reflected by the above contents, the service life of the PP-R pipe is the same as that of a building (more than or equal to 50 years), but the existing antibacterial standard has no long-term verification method, and the antibacterial material can be judged only through the initial antibacterial effect, so that whether the long-term service performance is influenced or not cannot be scientifically judged.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides an antibacterial long-acting test method and application, has the advantages of high efficiency, accuracy, science and the like of the test method, and solves the problem that the PP-R pipe does not have a long-acting verification test method in the antibacterial standard.
(II) technical scheme
In order to realize the purposes of high efficiency, accuracy and science of the PP-R pipe in the antibacterial test method, the invention provides the following technical scheme:
a method for testing antibacterial long-acting performance comprises the following steps of putting samples to be tested in the same batch in a water bath in a hot water (95 ℃) environment, measuring the antibacterial rate and the silver ion content of the samples in each water bath time period, drawing a prediction curve according to data, finding corresponding antibacterial rate and silver ion content data at 50 years, and judging whether the antibacterial long-acting performance can be achieved, wherein the specific steps are as follows:
1) Uniformly mixing materials for preparing a test sample, wherein the material formula comprises the following components in parts by weight: 100 parts of PP-R resin and 1-5 parts of antibacterial master batch;
2) Uniformly rolling the mixture obtained in the step 1) by using a double-roller plasticator, and pressing the mixture into sheets with the thickness of 0.3-0.8 mm;
3) Cutting the sheet obtained in the step 2) into 3 or more test sample sheets;
4) Putting the test sample wafer prepared in the step 3) in a hot water (95 ℃) environment for water bath for 0 day, 15 days, 30 days, 45 days and 90 days respectively, or arranging according to other sets;
5) Testing the antibacterial rate and the silver ion content of the sample wafers at different time after water bath;
6) Summarizing and analyzing the data, drawing a prediction curve, and finding out the antibacterial rate and silver ion content data corresponding to 50 years;
7) And (4) qualitatively judging the qualification of whether the sample can achieve the long-term antibacterial effect according to the antibacterial rate at 50 years and the silver ion content data obtained in the step 6).
Preferably, the antibacterial rate and the silver ion content at 50 years in the step 7) are determined according to the following formula:
the antibacterial rate is less than 99 percent, and the product is judged to be unqualified;
the silver ion content was < 50ppm, this data is reference data and no judgment was made.
Preferably, the method for testing the antibacterial rate and the silver ion content in the step 5) is as follows:
the antibacterial rate test method comprises the following steps: GB/T31402-2015 plastic-plastic surface antibacterial performance test method;
the silver ion content testing method comprises the following steps: the silver ion content was measured by atomic absorption spectrophotometry.
Preferably, the material formula in the step 1) comprises the following components in parts by weight: 100 parts of PP-R resin and 2 parts of antibacterial master batch.
Preferably, the material formula in the step 1) comprises the following components in parts by weight: 100 parts of PP-R resin and 3 parts of antibacterial master batch.
Preferably, the antibacterial ratio test strain is staphylococcus aureus.
Preferably, the silver ion content data is the arithmetic mean of the results of three tests.
According to the invention, the antibacterial long-term effect test method can be applied to the antibacterial long-term effect test of the PP-R pipe
(III) advantageous effects
Compared with the prior art, the invention provides an antibacterial long-acting performance test method and application, and the method has the following beneficial effects:
the method for testing the antibacterial long-acting performance and the application solve the problem of the conventional PP-R pipe in the antibacterial test at the same time of high efficiency, accuracy and science, and compared with the prior art, the antibacterial test adopts short-time test, the test is performed in a short time after the PP-R pipe is manufactured, the test can only reflect the antibacterial effect of the PP-R pipe on a test time node, the service life of the PP-R pipe is more than or equal to 50 years, the antibacterial effect of the PP-R pipe in the whole service life period of the PP-R pipe in the short-time test is extremely inaccurate, and the test method carries out water bath on the samples in the same batch in a hot water environment, measures the antibacterial rate and the silver ion content of the samples in each water bath time period, draws a prediction curve according to the data, finds corresponding antibacterial rate and silver ion content data in 50 years, and is used for judging whether the antibacterial long-acting performance can be achieved or not, so that the method is more efficient, accurate and scientific.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A method for testing antibacterial long-acting performance comprises the steps of putting samples to be tested in the same batch in a water bath in a hot water (95 ℃) environment, measuring the antibacterial rate and the silver ion content of the samples in each water bath time period, drawing a prediction curve according to data, finding corresponding antibacterial rate and silver ion content data in 50 years, and judging whether the antibacterial long-acting performance can be achieved or not.
The first embodiment is as follows:
1) Uniformly mixing materials for preparing a test sample, wherein the material formula comprises the following components in parts by weight: 100 parts of PP-R resin and 2 parts of antibacterial master batch;
2) Uniformly rolling the mixed material obtained in the step 1) by using a double-roller plasticator, and pressing the mixed material into a sheet with the thickness of 0.5 mm;
3) Cutting the sheet obtained in the step 2) into 3 test sample sheets;
4) Carrying out water bath on the test sample wafer prepared in the step 3) in a hot water (95 ℃) environment for 0 day, 45 days, 91 days, 182 days and 365 days respectively, and then carrying out the collective arrangement until the specific time is accurate to hours, wherein the data in the table 1 is used as a standard;
5) And (3) testing the antibacterial rate and the silver ion content of the sample wafers at different time after water bath, wherein the antibacterial rate testing method comprises the following steps: GB/T31402-2015 plastics-plastics surface antibacterial property test method, the test bacterial is staphylococcus aureus; the silver ion content testing method comprises the following steps: measuring the silver ion content by an atomic absorption spectrophotometer, wherein the silver ion content data is the arithmetic average value of the three test results;
6) Summarizing and analyzing the data, drawing a prediction curve, and finding out the antibacterial rate and silver ion content data corresponding to 50 years;
7) And (4) qualitatively judging the qualification of whether the sample can achieve the long-term antibacterial effectiveness or not according to the antibacterial rate and the silver ion content data at 50 years obtained in the step 6), wherein the judgment is judged to be unqualified according to the antibacterial rate of less than 99 percent, the silver ion content of less than 50ppm, and the data is reference data without judgment.
The test samples of 100 parts by weight of PP-R resin and 2 parts by weight of antibacterial master batch in the material formula are subjected to antibacterial rate and silver ion content tests by the method, and the data is shown in example 1 in Table 1.
The second embodiment:
1) Uniformly mixing materials for preparing a test sample, wherein the material formula comprises the following components in parts by weight: 100 parts of PP-R resin and 2 parts of antibacterial master batch;
2) Uniformly rolling the mixed material obtained in the step 1) by using a double-roller plasticator, and pressing the mixed material into a sheet with the thickness of 0.5 mm;
3) Cutting the sheet obtained in the step 2) into 3 test sample sheets;
4) Carrying out water bath on the test sample wafer prepared in the step 3) in a hot water (95 ℃) environment for 0 day, 45 days, 91 days, 182 days and 365 days respectively, and then carrying out the collective arrangement until the specific time is accurate to hours, wherein the data in the table 1 is used as a standard;
5) And (3) testing the antibacterial rate and the silver ion content of the sample wafers at different time after water bath, wherein the antibacterial rate testing method comprises the following steps: GB/T31402-2015 plastics-plastic surface antibacterial property test method, the test bacterial is staphylococcus aureus; the silver ion content testing method comprises the following steps: measuring the silver ion content by an atomic absorption spectrophotometer, wherein the silver ion content data is the arithmetic average value of the three test results;
6) Summarizing and analyzing the data, drawing a prediction curve, and finding out the antibacterial rate and silver ion content data corresponding to 50 years;
7) And (3) qualitatively judging the qualification of whether the sample can reach the long-term antibacterial long-term effect according to the antibacterial rate and the silver ion content data at 50 years obtained in the step 6), wherein the judgment is unqualified according to the antibacterial rate of less than 99 percent, the silver ion content of less than 50ppm, and the data is reference data without judgment.
The secondary tests of the antibacterial rate and the silver ion content are carried out on the samples of 100 parts of PP-R resin and 2 parts of antibacterial master batch according to the weight parts by adopting the method, and the data is shown as example 2 in Table 1.
Example three:
1) Uniformly mixing materials for preparing a test sample, wherein the material formula comprises the following components in parts by weight: 100 parts of PP-R resin and 3 parts of antibacterial master batch;
2) Uniformly rolling the mixed material obtained in the step 1) by using a double-roller plasticator, and pressing the mixed material into a sheet with the thickness of 0.5 mm;
3) Cutting the sheet obtained in the step 2) into 3 test sample sheets;
4) Carrying out water bath on the test sample wafer prepared in the step 3) in a hot water (95 ℃) environment for 0 day, 45 days, 91 days, 182 days and 365 days respectively, and then carrying out the collective arrangement until the specific time is accurate to hours, wherein the data in the table 1 is used as a standard;
5) And (3) carrying out the tests on the antibacterial rate and the silver ion content of the sample wafer at different time after water bath, wherein the antibacterial rate test method comprises the following steps: GB/T31402-2015 plastics-plastic surface antibacterial property test method, the test bacterial is staphylococcus aureus; the silver ion content testing method comprises the following steps: measuring the content of silver ions by an atomic absorption spectrophotometer, wherein the data of the content of the silver ions is the arithmetic average value of the three test results;
6) Summarizing and analyzing the data, drawing a prediction curve, and finding out the antibacterial rate and silver ion content data corresponding to 50 years;
7) And (4) qualitatively judging the qualification of whether the sample can achieve the long-term antibacterial effectiveness or not according to the antibacterial rate and the silver ion content data at 50 years obtained in the step 6), wherein the judgment is judged to be unqualified according to the antibacterial rate of less than 99 percent, the silver ion content of less than 50ppm, and the data is reference data without judgment.
The test samples of 100 parts by weight of PP-R resin and 3 parts by weight of antibacterial master batch in the material formula are subjected to antibacterial rate and silver ion content tests by the method, and the data is shown in example 3 in Table 1.
TABLE 1
According to the data in table 1, the antibacterial rate and the silver ion content test data of the samples in the three embodiments are shown, the water area time is 1095 hours, 2190 hours, 4380 hours and 8760 hours, curves are drawn to predict the antibacterial rate and the silver ion content test data after 50 years, and finally the qualification rate of the samples in the whole service cycle is judged.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The method for testing the antibacterial long-acting performance is characterized in that samples to be tested in the same batch are subjected to water bath in a hot water environment of 95 ℃, the antibacterial rate and the silver ion content of the samples in each water bath time period are measured, a prediction curve is drawn according to data, and corresponding antibacterial rate and silver ion content data in 50 years are found out to judge whether the antibacterial long-acting performance can be achieved, and the method specifically comprises the following steps:
1) Uniformly mixing materials for preparing a test sample, wherein the material formula comprises the following components in parts by weight: 100 parts of PP-R resin and 1-5 parts of antibacterial master batch;
2) Uniformly rolling the mixed material obtained in the step 1) by using a double-roller plasticator, and pressing the mixed material into a sheet with the thickness of 0.3-0.8 mm;
3) Cutting the sheet obtained in the step 2) into 3 or more test sample sheets;
4) Putting the test sample wafer prepared in the step 3) in a hot water bath at 95 ℃ for 0 day, 15 days, 30 days, 45 days and 90 days respectively, or arranging according to other sets;
5) Carrying out antibacterial rate and silver ion content tests on the sample wafers at different time after water bath;
6) Summarizing and analyzing the data, drawing a prediction curve, and finding out the antibacterial rate and silver ion content data corresponding to 50 years;
7) And (4) qualitatively judging the qualification of whether the sample can achieve the long-term antibacterial effect according to the antibacterial rate at 50 years and the silver ion content data obtained in the step 6).
2. The method for testing antibacterial long-term efficacy according to claim 1, wherein the judgment basis of the antibacterial rate and the silver ion content at 50 years in the step 7) is as follows:
the antibacterial rate is less than 99 percent, and the product is judged to be unqualified;
silver ion content < 50ppm, this data is the reference data and no judgment is made.
3. The method for testing antibacterial long-acting property according to claim 1, wherein the antibacterial rate and silver ion content in step 5) are as follows:
the antibacterial rate test method comprises the following steps: GB/T31402-2015 plastic-plastic surface antibacterial performance test method;
the silver ion content testing method comprises the following steps: the silver ion content was measured by atomic absorption spectrophotometry.
4. The method for testing antibacterial long-acting property according to claim 1, wherein the material formula in the step 1) comprises the following components in parts by weight: 100 parts of PP-R resin and 2 parts of antibacterial master batch.
5. The method for testing antibacterial long-acting property according to claim 1, wherein the material formula in the step 1) comprises the following components in parts by weight: 100 parts of PP-R resin and 3 parts of antibacterial master batch.
6. The method of claim 1, wherein the antimicrobial efficacy-testing bacterial species is Staphylococcus aureus.
7. The method of claim 1, wherein the silver ion content data is an arithmetic mean of three test results.
8. Use of the method of any one of claims 1 to 7 in the testing of the antimicrobial longevity of PP-R tubes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211137001.1A CN115343457A (en) | 2022-09-19 | 2022-09-19 | Antibacterial long-acting performance test method and application |
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| CN202211137001.1A CN115343457A (en) | 2022-09-19 | 2022-09-19 | Antibacterial long-acting performance test method and application |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518880A (en) * | 2011-12-07 | 2012-06-27 | 合肥安诺新型建材有限公司 | Environment-friendly antimicrobial PP-R (polypropylene-random) pipe |
| MX2014012132A (en) * | 2014-10-08 | 2016-04-07 | Inst Nac De Astrofisica Optica Y Electronica | Closed cycle water cooling towers for cryogenic equipment compressors. |
| CN106832603A (en) * | 2017-02-27 | 2017-06-13 | 北京崇高纳米科技有限公司 | A kind of antibacterial atactic polypropylene water-feeding pipes and its production method |
-
2022
- 2022-09-19 CN CN202211137001.1A patent/CN115343457A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518880A (en) * | 2011-12-07 | 2012-06-27 | 合肥安诺新型建材有限公司 | Environment-friendly antimicrobial PP-R (polypropylene-random) pipe |
| MX2014012132A (en) * | 2014-10-08 | 2016-04-07 | Inst Nac De Astrofisica Optica Y Electronica | Closed cycle water cooling towers for cryogenic equipment compressors. |
| CN106832603A (en) * | 2017-02-27 | 2017-06-13 | 北京崇高纳米科技有限公司 | A kind of antibacterial atactic polypropylene water-feeding pipes and its production method |
Non-Patent Citations (2)
| Title |
|---|
| 樊小爱: "聚丙烯(PPR)管材在给水工程中的应用", 《科技情报开发与经济》, vol. 16, no. 12, 31 December 2006 (2006-12-31) * |
| 河南省建设教育协会: "《建筑新技术》", 31 December 2003, 黄河水利出版社, pages: 224 * |
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