CN105176044A - Conducting master batch, and preparation method and application thereof - Google Patents
Conducting master batch, and preparation method and application thereof Download PDFInfo
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- CN105176044A CN105176044A CN201510682814.2A CN201510682814A CN105176044A CN 105176044 A CN105176044 A CN 105176044A CN 201510682814 A CN201510682814 A CN 201510682814A CN 105176044 A CN105176044 A CN 105176044A
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- polycarbonate
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- wollastonite
- polyethylene
- carbon black
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Abstract
The invention provides a conducting master batch. The conducting master batch is prepared from the following raw materials in percentage by weight: 50 to 90 percent of polyethylene/carbon black compound and 10 to 50 percent of polycarbonate/wollastonite compound, wherein the polyethylene/carbon black compound is prepared from the following raw materials in percentage by weight: 85 to 95 percent of polyethylene and 5 to 15 percent of carbon black; the polycarbonate/wollastonite compound is prepared from the following raw materials in percentage by weight: 80 to 98 percent of polycarbonate and 2 to 20 percent of wollastonite. The invention also provides a conducting material which is prepared by the conducting master batch. The conducting material is prepared from the following raw materials in percentage by weight: 10 to 30 percent of conducting master batch and 70 to 90 percent of polycarbonate. According to the conducting master batch provided by the invention, a dual-percolation compound system is formed in the polycarbonate by the conducting master batch, remarkable conducting performance is achieved under low content of the carbon black, and the defects of the reduction of the mechanical property and the like caused by high content of the carbon black in an existing material can be overcome.
Description
Technical field
The invention belongs to electro-conductive material technical field, more specifically, relate to a kind of conductive agglomerate and its preparation method and application.
Background technology
Preparing in conductive agglomerate process, the content of carbon black in conductive agglomerate is the major issue needing to solve.The volume specific resistance of conductive agglomerate reduces with the increase of content of carbon black usually, but content of carbon black can be with while increasing and serve negative impact, affecting the spinning property of master batch as made the increase of the apparent viscosity of conductive agglomerate, causing mechanical property reduction, surface quality decline.The effective way of current reduction polymer-based carbon black conductive composite system percolation threshold introduces the third phase poor with matrix phase capacitive in compound system, and this phase can form continuous structure in the base, carbon black can selective enrichment in this phase or two-phase interface place, thus conductive channel is formed in compound system, namely generation is two exceedes the effect of oozing, and effectively can reduce the loading level of carbon black.Have not been reported in existing patent.
Chinese patent CN103897368A discloses a kind of conductive polycarbonate composites and goods thereof and preparation method, its with carbon black A and black B for conductive filler material, single stage method is prepared into electro-conductive material, its electroconductibility and toughness properties good, but content of carbon black all needs more than 10%, height is carbon black-filled certainly will have negative impact to the impact property of product and surface quality.
Therefore, the problem that the present invention overcomes seeks a kind of suitable conductive agglomerate, make it reach two compound system structure exceeding the effect of oozing, while guarantee conductivity, in compound system, content of carbon black reduces further, and then does not affect mechanics or other performances of material.
Summary of the invention
The present invention, according to the deficiency in current carbon black conductive master batch and the electro-conductive material technology for preparing thereof, provides a kind of conductive agglomerate and its preparation method and application.
Technical purpose of the present invention is achieved through the following technical solutions:
The invention provides a kind of conductive agglomerate, comprise following raw material by weight percentage and make:
Polyethylene/carbon ink mixture 50 ~ 90%
Polycarbonate/wollastonite mixture 10 ~ 50%
Described polyethylene/carbon ink mixture comprises following raw material by weight percentage and makes:
Polyethylene 85 ~ 95%
Carbon black 5 ~ 15%
Described polycarbonate/wollastonite mixture comprises following raw material by weight percentage and makes:
Polycarbonate 80 ~ 98%
Wollastonite 2 ~ 20%.
Further, the invention provides a kind of electro-conductive material prepared by described conductive agglomerate, comprise following raw material by weight percentage and make:
Conductive agglomerate 10 ~ 30%
Polycarbonate 70 ~ 90%.
The present invention for conductive filler material with carbon black (CB) and polyethylene (PE), is compound in polycarbonate (PC), adds PC-wollastonite in conductive agglomerate compound system, make material have the feature of dual diafiltration.By CB and wollastonite blended with PE and PC respectively, impel CB particle phase PC phase to move by ethanol or acetone aid dispersion-pressure sintering, but due to the inhibition of the wollastonite in PC, migration can only concentrate on the interface of PE and PC phase.The two transudations of conductive agglomerate in PC make matrix material under low conducting particles content have significant conductivity.
Existing carbon black conductive master batch, the loading level of CB is large, and conductivity improves but poor mechanical property.The present invention is by PE-CB and PC-wollastonite compound, CB particle phase PC phase is impelled to move by ethanol or acetone aid dispersion-pressure sintering, but due to the inhibition of the wollastonite in PC, migration can only concentrate on the interface of PE and PC phase, thus obtain common continuous structure, under low CB percolation threshold, obtain the mechanical property that conductivity does not well affect again material.
The preparation method of conductive agglomerate provided by the invention, comprises the steps:
S1. polycarbonate and wollastonite are melt extruded at 180 ~ 220 DEG C, prepare polycarbonate/wollastonite mixture;
S2. polyethylene and carbon black are carried out blended after, add ethanol or acetone, stir, ultrasonic, obtain polyethylene/carbon ink mixture after drying;
S3. described conductive agglomerate is namely obtained by hot-forming after the mixing of the polyethylene/carbon ink mixture of gained in the polycarbonate of gained in S1/wollastonite mixture and S2.
Preferably, in described S2, ultrasonic time is 30 ~ 60min.
Preferably, in described S3, hot-forming temperature is 180 ~ 200 DEG C, and the described hot-forming time is 3 ~ 8min.
Further, the invention provides the preparation method of described electro-conductive material, after being mixed with polycarbonate by conductive agglomerate, melting at 240 ~ 260 DEG C, extrudes, pelletizing, obtains described electro-conductive material.
Compared with prior art, the present invention has following beneficial effect:
The present invention makes CB particle distribution at the interface of PE and PC phase by ethanol (or acetone) aid dispersion-pressure sintering, thus obtain continuous structure, preparation-obtained composite structure obtains fabulous conductivity, and its content of carbon black is lower, mechanical property is substantially unaffected, described preparation method is simple, is easy to realize a large amount of production, possesses extremely strong using value.
Embodiment
Below by embodiment, the present invention is specifically described; what be necessary to herein means out is that the present embodiment is only used to further illustrate the present invention; but can not be interpreted as limiting the scope of the invention, the person skilled in the art in this field can make some nonessential improvement and adjustment according to the content of the invention described above.
Unless stated otherwise, the present invention adopts reagent, method and apparatus are the art conventional reagent, method and apparatus.
Wherein, in the present invention, properties obtains according to following instruments and methods:
Volume specific resistance: adopt EST121 type numeral ultra-high resistance, micro current instrument, according to GB/T1410-2006 test
Tensile strength: adopt universal testing machine, according to ASTM/D638 test
Flexural strength: adopt universal testing machine, according to ASTM/D790 test
Shock strength: adopt shock-testing machine, according to GB/T1043 test
embodiment 1:
(1) preparation of conductive agglomerate: PC and wollastonite are melt extruded at 180-220 DEG C, preparation PC-wollastonite composite particles, add dehydrated alcohol after CB and PE is blended and carry out mechanical stirring and the process of 40min ultrasonic disperse, obtain the suspension liquid of PE-CB composite particles; At after vacuum-drying, PE-CB and PC-wollastonite puts into 190 DEG C, mould by 80:20 composite particles, hot-forming 5min obtains conductive agglomerate.
(2) conductive agglomerate is applied in PC: after 20 parts of conductive agglomerates mix with 100 parts of PC, melt extrude at the temperature of 240-260 DEG C, pelletizing, obtains conduction PC matrix material.
Wherein, the interpolation parts by weight of PE, CB, PC, wollastonite, PC are 14.4:1.6:3.8:0.2:100.
embodiment 2:
(1) preparation of conductive agglomerate: PC and wollastonite are melt extruded at 180-220 DEG C, preparation PC-wollastonite composite particles, add dehydrated alcohol after CB and PE is blended and carry out mechanical stirring and the process of 40min ultrasonic disperse, obtain the suspension liquid of PE-CB composite particles; At after vacuum-drying, PE-CB and PC-wollastonite puts into 190 DEG C, mould by 80:20 composite particles, hot-forming 5min obtains conductive agglomerate.
(2) conductive agglomerate is applied in PC: after 20 parts of conductive agglomerates mix with 100 parts of PC, melt extrude at the temperature of 240-260 DEG C, pelletizing, obtains conduction PC matrix material.
Wherein, the interpolation parts by weight of PE, CB, PC, wollastonite, PC are 12.8:3.2:3.8:0.2:100.
embodiment 3:
(1) preparation of conductive agglomerate: PC and wollastonite are melt extruded at 180-220 DEG C, preparation PC-wollastonite composite particles, add dehydrated alcohol after CB and PE is blended and carry out mechanical stirring and the process of 40min ultrasonic disperse, obtain the suspension liquid of PE-CB composite particles; At after vacuum-drying, PE-CB and PC-wollastonite puts into 190 DEG C, mould by 50:50 composite particles, hot-forming 5min obtains conductive agglomerate.
(2) conductive agglomerate is applied in PC: after 30 parts of conductive agglomerates mix with 100 parts of PC, melt extrude at the temperature of 240-260 DEG C, pelletizing, obtains conduction PC matrix material.
Wherein, PE, CB, PC, wollastonite, PC mixed weight are than being 10.5:4.5:14.25:0.75:100.
comparative example 1 ~ 3:single stage method preparation conduction PC matrix material
comparative example 1:
After in proportion PE, CB, PC, wollastonite, PC being mixed by 14.4:1.6:3.8:0.2:100, melt extrude at the temperature of 240-260 DEG C, granulation, obtain conduction PC matrix material.
comparative example 2:
Method presses 12.8:3.2:3.8:0.2:100 with comparative example 1, PE, CB, PC, wollastonite, PC.
comparative example 3:
Method presses 10.5:4.5:14.25:0.75:100 with comparative example 1, PE, CB, PC, wollastonite, PC.
The test performance of embodiment 1 ~ 3 and comparative example 1 ~ 3 is in table 1.
Table 1
| Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 | Comparative example 3 | |
| Carbon black weight part | 1.6 | 3.2 | 4.5 | 1.6 | 3.2 | 4.5 |
| Tensile strength (MPa) | 59 | 65 | 63 | 54 | 59 | 52 |
| Flexural strength (MPa) | 80 | 85 | 92 | 75 | 74 | 80 |
| Shock strength (J/M -2） | 527 | 498 | 450 | 502 | 475 | 399 |
| Volume specific resistance (Ω * cm) | 2.1*10 3 | 1.3*10 2 | 1.5*10 4 | 4.0*10 12 | 2.5*10 10 | 6.8*10 9 |
Contrast from the volume resistance rate score of embodiment 1 ~ 3 and comparative example 1 ~ 3, prepare corresponding mixture, the electro-conductive material prepared after then carrying out melting owing to have employed the method for fractional steps, its volume specific resistance reduces 10
5~ 10
10the individual order of magnitude, show the conductivity that it is splendid, and the content of carbon black is 1.3 ~ 3.5% in embodiment 1 ~ 3, be compared to current Carbon Black Conductive Composites, its content of carbon black reduces greatly, preparing low levels carbon black conductive material, and do not affecting in the electro-conductive material of its corresponding mechanical property and other performances and have great using value.
The above embodiment only have expressed embodiments of the present invention; it describes comparatively concrete and detailed; but therefore can not be interpreted as the restriction to the scope of the claims of the present invention; in every case the technical scheme adopting the form of equivalent replacement or equivalent transformation to obtain, all should drop within protection scope of the present invention.
Claims (8)
1. a conductive agglomerate, is characterized in that, the raw material comprising following percentage is made:
Polyethylene/carbon ink mixture 50 ~ 90%
Polycarbonate/wollastonite mixture 10 ~ 50%
Described polyethylene/carbon ink mixture comprises following raw material by weight percentage and makes:
Polyethylene 85 ~ 95%
Carbon black 5 ~ 15%
Described polycarbonate/wollastonite mixture comprises following raw material by weight percentage and makes:
Polycarbonate 80 ~ 98%
Wollastonite 2 ~ 20%.
2. the electro-conductive material prepared by conductive agglomerate according to claim 1, is characterized in that, comprises following raw material by weight percentage and makes:
Conductive agglomerate 10 ~ 30%
Polycarbonate 70 ~ 90%.
3. a preparation method for conductive agglomerate according to claim 1, is characterized in that, comprises the steps:
S1. polycarbonate and wollastonite are melt extruded at 180 ~ 220 DEG C, prepare polycarbonate/wollastonite mixture;
S2. polyethylene and carbon black are carried out blended after, add ethanol or acetone, stir, ultrasonic, obtain polyethylene/carbon ink mixture after drying;
S3. described conductive agglomerate is namely obtained by hot-forming after the mixing of the polyethylene/carbon ink mixture of gained in the polycarbonate of gained in S1/wollastonite mixture and S2.
4. the preparation method of conductive agglomerate according to claim 3, is characterized in that, in described S2, ultrasonic time is 30 ~ 60min.
5. the preparation method of conductive agglomerate according to claim 3, is characterized in that, in described S3, hot-forming temperature is 180 ~ 200 DEG C, and the described hot-forming time is 3 ~ 8min.
6. a preparation method for electro-conductive material according to claim 2, is characterized in that, after being mixed with polycarbonate by conductive agglomerate, melting at 240 ~ 260 DEG C, extrudes, pelletizing, obtains described electro-conductive material.
7. a conductive agglomerate according to claim 1 is preparing the application in macromolecule conducting material.
8. the application in macromolecule conducting material prepared by an electro-conductive material according to claim 2.
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| CN201510682814.2A CN105176044B (en) | 2015-10-21 | 2015-10-21 | A kind of conductive agglomerate and its preparation method and application |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112659441A (en) * | 2021-01-13 | 2021-04-16 | 福建工程学院 | Application method of polycarbonate as optical limiting material |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0578245A2 (en) * | 1992-07-10 | 1994-01-12 | Mitsubishi Chemical Corporation | Process for producing a resin compound |
| CN103897368A (en) * | 2012-12-28 | 2014-07-02 | 金发科技股份有限公司 | Conductive polycarbonate composite material and product and preparation method thereof |
-
2015
- 2015-10-21 CN CN201510682814.2A patent/CN105176044B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0578245A2 (en) * | 1992-07-10 | 1994-01-12 | Mitsubishi Chemical Corporation | Process for producing a resin compound |
| CN103897368A (en) * | 2012-12-28 | 2014-07-02 | 金发科技股份有限公司 | Conductive polycarbonate composite material and product and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112659441A (en) * | 2021-01-13 | 2021-04-16 | 福建工程学院 | Application method of polycarbonate as optical limiting material |
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| CN105176044B (en) | 2016-11-30 |
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Effective date of registration: 20201221 Address after: 517221 area a, No.2, Gongye 3rd road, Daba Industrial Zone, Daba Town, Heping County, Heyuan City, Guangdong Province Patentee after: Guangdong Baote New Material Co.,Ltd. Address before: 523690 workshop 3, 1st floor, building Z, 68 Buxin Hongshi Road, Yantian village, Fenggang town, Dongguan City, Guangdong Province Patentee before: DONGGUAN BAOTE POLYMER MATERIALS SCIENCE AND TECHNOLOGY Co.,Ltd. |