CN105386237A - Preparation method of silicon carbide fiber felt and wet method deposition device for preparation - Google Patents
Preparation method of silicon carbide fiber felt and wet method deposition device for preparation Download PDFInfo
- Publication number
- CN105386237A CN105386237A CN201510978895.0A CN201510978895A CN105386237A CN 105386237 A CN105386237 A CN 105386237A CN 201510978895 A CN201510978895 A CN 201510978895A CN 105386237 A CN105386237 A CN 105386237A
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- China
- Prior art keywords
- fibre
- preparation
- felt
- polycarbosilane
- fusion
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C7/00—Heating or cooling textile fabrics
- D06C7/04—Carbonising or oxidising
Abstract
The invention discloses a preparation method of silicon carbide fiber felt and a wet method deposition device for preparation. The preparation method comprises the following steps that 1, polycarbosilane non-fusion fiber is cut to be short and opened to form short fiber with uniform dispersion; 2, the short fiber obtained in the first step is mixed with paper pulp to prepare polycarbosilane non-fusion fiber felt; 3, high temperature mineralization is performed on the polycarbosilane non-fusion fiber felt obtained in the second step to obtain the silicon carbide fiber felt. The silicon carbide fiber felt is simple in preparation technology, high in preparation speed and free of damage to fiber.
Description
Technical field
The present invention relates to a kind of preparation method of silicon carbide fibre felt.
Background technology
The excellent properties such as fibrofelt has light weight, unit weight is little, density is high, air penetrability is good, dust containing capacity is large, can be used as the materials such as sewage disposal, purification of air, insulation and sound insulation.Silicon carbide fibre is a kind of ceramic fibre with characteristics such as high-strength and high-modulus, high temperature resistant, anti-oxidant, resistance to chemical attack, salt spray resistance, radiation hardness.Its silicon carbide fibre felt made has the advantages such as low compact substance is light, porosity is high, specific area is large, high temperature oxidation resisting, is the important development new material in the fields such as Aero-Space, communications and transportation, environmental protection.
At present, silicon carbide fibre felt obtains mainly through electrostatic spinning and needle point method.Adopt needle point method to prepare silicon carbide fibre pin felt, because the modulus of silicon carbide fibre is large, cohesive force is little, and therefore acupuncture difficulty is large, and simultaneously because silicon carbide fibre fragility is large, therefore the damage of acupuncture course to fiber is large.And adopting electrostatic spinning felt, speed is extremely slow, and output is extremely low.
Summary of the invention
The object of the invention is to solve the defect existed in prior art, providing that a kind of technique is simple, felt speed fast, method to fibrous zero damage.
In order to achieve the above object, the invention provides a kind of preparation method of silicon carbide fibre felt, comprise the following steps:
(1) Polycarbosilane fusion-free fibre is carried out prescinding shredding, form finely dispersed staple fibre;
(2) staple fibre obtained in step (1) and paper pulp are mixed with Polycarbosilane fusion-free fibre felt;
(3) high temperature inorganic is carried out to the Polycarbosilane fusion-free fibre felt that step (2) obtains, obtain silicon carbide fibre felt.
The concrete preparation method of silicon carbide fibre felt of the present invention is as follows:
(1) Polycarbosilane fusion-free fibre is carried out prescinding shredding: Polycarbosilane fusion-free fibre is cut into the staple fibre that length is 3cm ~ 8cm, then through air-flow shredding, make fiber dispersion even;
(2) preparation of Polycarbosilane fusion-free fibre felt: the staple fibre obtain step (1) and paper pulp mixing and stirring, after wet method deposition, dries, obtains Polycarbosilane fusion-free fibre felt; Staple fibre accounts for 35% ~ 90% of staple fibre and paper pulp gross weight;
(3) high temperature inorganic of Polycarbosilane fusion-free fibre felt: Polycarbosilane fusion-free fibre felt is put into high temperature furnace, sinters in an inert atmosphere, silicon carbide fibre felt can be obtained.
Wherein, Polycarbosilane fusion-free fibre is that polycarbosilane fiber is placed in non-fusible device, first in atmosphere, carries out low-temperature oxidation process 15 ~ 30 hours at 100 ~ 150 DEG C; Then under high pure nitrogen protection, at 150 ~ 350 DEG C, 6 ~ 15 hours are processed, obtained Polycarbosilane fusion-free fibre.
Wet method deposition process in step (2) is as follows: after staple fibre and paper pulp are stirred into uniform suspension, by filter screen, filters and removes moisture unnecessary in suspension.
The every weight per square meter 100g ~ 1500g of Polycarbosilane fusion-free fibre felt that step (2) prepares.
In step (3) during sintering, Polycarbosilane fusion-free fibre felt is placed in high temperature furnace, under high pure nitrogen protection, is warming up to 1000 ~ 1300 DEG C by the speed of 15 ~ 240 DEG C/h, insulation 1 ~ 1.5h, obtained silicon carbide fibre felt.
Present invention also offers above-mentioned silicon carbide fibre felt wet method precipitation equipment for subsequent use, comprise water receiver, filter screen and water drain valve; Water receiver lower end is provided with water drain valve; Filter screen is located at water receiver lower inside.
The present invention has the following advantages compared to existing technology:
(1) the present invention adopts Polycarbosilane fusion-free fibre to be raw material, and carbonization after first felt is with low cost, and does not pollute environment.
(2) the present invention adopts wet method felt, and avoid the impact of the factors such as jet in electrostatic spinning is unstable, spinning fluid viscosity is inapplicable, felt speed is much higher than electrostatic and is spun into felt technology.
(3) the present invention adopts wet method felt, avoid acupuncture and become felt cost high, and in acupuncture course, pricker even causes the phenomenon of fibrous fracture to the damage of fiber.
Accompanying drawing explanation
Fig. 1 is the structural representation of preparation wet method precipitation equipment of the present invention;
Fig. 2 is the infrared spectrum of silicon carbide fibre felt of the present invention raw material polycarbosilane fiber for subsequent use;
Fig. 3 is the infrared spectrum of the silicon carbide fibre felt that the present invention prepares.
In figure, 1-water receiver, 2-filter screen, 3-water drain valve.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in detail.
Embodiment 1
Polycarbosilane fiber is placed in non-fusible device, first in atmosphere, at 100 ~ 150 DEG C, carries out low-temperature oxidation process 15 ~ 30 hours; Then under high pure nitrogen protection, at 150 ~ 350 DEG C, 6 ~ 15 hours are processed, obtained Polycarbosilane fusion-free fibre.
Polycarbosilane fusion-free fibre is cut into the staple fibre that length is 5cm, mix by weight the ratio for 8:2 with paper pulp after air dispersion, pour into after stirring (as shown in Figure 1) in the water receiver 1 of wet method precipitation equipment, stirring makes mixed liquor be in nonstatic state (suspension), then water drain valve 3 is opened, make water quickly through filter screen 2, by moisture unnecessary in strainer filtering mixed liquor, thus obtain Polycarbosilane fusion-free fibre felt, after oven for drying, the Polycarbosilane fusion-free fibre felt that weight per square meter is 400g can be obtained; Again Polycarbosilane fusion-free fibre felt is put into high temperature furnace, under nitrogen protection atmosphere, carry out high temperature inorganic, after temperature is increased to 1100 DEG C, is incubated 1 hour, then with stove Temperature fall, SiC fibrofelt can be obtained.
Carry out infrared spectrum qualification to raw material and product, as shown in Figure 2 and Figure 3, the silicon carbide fibre felt high temperature cabonization obtained is thorough, can meet the requirement of fibrous mat structure and function.
Embodiment 2
Polycarbosilane fusion-free fibre embodiment 1 prepared is cut into the staple fibre that length is 6cm, mix by weight the ratio for 4:6 with paper pulp after air dispersion, pour into after stirring (as shown in Figure 1) in the water receiver 1 of wet method precipitation equipment, stirring makes mixed liquor be in nonstatic state (suspension), then water drain valve 3 is opened, make water quickly through filter screen 2, by moisture unnecessary in strainer filtering mixed liquor, thus obtain Polycarbosilane fusion-free fibre felt, after oven for drying, the Polycarbosilane fusion-free fibre felt that weight per square meter is 850g can be obtained, again Polycarbosilane fusion-free fibre felt is put into high temperature furnace, under nitrogen protection atmosphere, carry out high temperature inorganic, after temperature is increased to 1100 DEG C, is incubated 1 hour, then with stove Temperature fall, SiC fibrofelt can be obtained.
Embodiment 3:
Polycarbosilane fusion-free fibre embodiment 1 prepared is cut into the staple fibre that length is 8cm, mix by weight the ratio for 7:3 with paper pulp after air dispersion, pour into after stirring (as shown in Figure 1) in the water receiver 1 of wet method precipitation equipment, stirring makes mixed liquor be in nonstatic state (suspension), then water drain valve 3 is opened, make water quickly through filter screen 2, by moisture unnecessary in strainer filtering mixed liquor, thus obtain Polycarbosilane fusion-free fibre felt, after oven for drying, the Polycarbosilane fusion-free fibre felt that weight per square meter is 1000g can be obtained, again Polycarbosilane fusion-free fibre felt is put into high temperature furnace, under nitrogen protection atmosphere, carry out high temperature inorganic, after temperature is increased to 1300 DEG C, is incubated 1 hour, then with stove Temperature fall, SiC fibrofelt can be obtained.
Claims (7)
1. a preparation method for silicon carbide fibre felt, is characterized in that: comprise the following steps:
(1) Polycarbosilane fusion-free fibre is carried out prescinding shredding, form finely dispersed staple fibre;
(2) staple fibre obtained in step (1) and paper pulp are mixed with Polycarbosilane fusion-free fibre felt;
(3) high temperature inorganic is carried out to the Polycarbosilane fusion-free fibre felt that step (2) obtains, obtain described silicon carbide fibre felt.
2. preparation method according to claim 1, is characterized in that: comprise the following steps:
(1) Polycarbosilane fusion-free fibre is carried out prescinding shredding: Polycarbosilane fusion-free fibre is cut into the staple fibre that length is 3cm ~ 8cm, then through air-flow shredding, make fiber dispersion even;
(2) preparation of Polycarbosilane fusion-free fibre felt: the staple fibre obtain step (1) and paper pulp mixing and stirring, after wet method deposition, dries, obtains described Polycarbosilane fusion-free fibre felt; Described staple fibre accounts for 35% ~ 90% of staple fibre and paper pulp gross weight;
(3) high temperature inorganic of Polycarbosilane fusion-free fibre felt: Polycarbosilane fusion-free fibre felt is put into high temperature furnace, sinters in an inert atmosphere, silicon carbide fibre felt can be obtained.
3. preparation method according to claim 1 and 2, is characterized in that: described Polycarbosilane fusion-free fibre is that polycarbosilane fiber is placed in non-fusible device, first in atmosphere, carries out low-temperature oxidation process 15 ~ 30 hours at 100 ~ 150 DEG C; Then under high pure nitrogen protection, at 150 ~ 350 DEG C, 6 ~ 15 hours are processed, obtained fusion-free fibre.
4. preparation method according to claim 2, is characterized in that: the wet method deposition process in described step (2) is as follows: after staple fibre and paper pulp are stirred into uniform suspension, by filter screen, filters and removes moisture unnecessary in suspension.
5. preparation method according to claim 2, is characterized in that: the every weight per square meter 100g ~ 1500g of Polycarbosilane fusion-free fibre felt that step (2) prepares.
6. preparation method according to claim 2; it is characterized in that: in described step (3) during sintering; Polycarbosilane fusion-free fibre felt is placed in high temperature furnace; under high pure nitrogen protection; 1000 ~ 1300 DEG C are warming up to by the speed of 15 ~ 240 DEG C/h; insulation 1 ~ 1.5h, obtained silicon carbide fibre felt.
7. a silicon carbide fibre felt wet method precipitation equipment for subsequent use, is characterized in that: comprise water receiver, filter screen and water drain valve; Described water receiver lower end is provided with water drain valve; Described filter screen is located at water receiver lower inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510978895.0A CN105386237B (en) | 2015-12-24 | 2015-12-24 | A kind of preparation method and preparation wet method precipitation equipment of silicon carbide fibre felt |
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| CN201510978895.0A CN105386237B (en) | 2015-12-24 | 2015-12-24 | A kind of preparation method and preparation wet method precipitation equipment of silicon carbide fibre felt |
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| CN105386237A true CN105386237A (en) | 2016-03-09 |
| CN105386237B CN105386237B (en) | 2018-09-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108221181A (en) * | 2018-01-03 | 2018-06-29 | 江西嘉捷信达新材料科技有限公司 | The preparation method of special-shaped silicon carbide fibre felt |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0978359A (en) * | 1995-09-05 | 1997-03-25 | Ube Ind Ltd | Inorganic fiber and felt |
| CN101234906A (en) * | 2008-02-28 | 2008-08-06 | 山东红阳耐火保温材料有限公司 | Method for preparing zirconium oxide fiber board |
| CN103306048A (en) * | 2012-03-07 | 2013-09-18 | 福建赛特新材股份有限公司 | Fiber mat, preparation method and core material for vacuum thermal insulation plate |
| CN103320966A (en) * | 2013-07-04 | 2013-09-25 | 厦门大学 | Preparation method for flexible polycrystalline silicon carbide micro-nanofiber mat |
| CN103668779A (en) * | 2013-12-23 | 2014-03-26 | 苏州中宝复合材料有限公司 | Silicon carbide fiber needle felt and manufacturing method thereof |
-
2015
- 2015-12-24 CN CN201510978895.0A patent/CN105386237B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0978359A (en) * | 1995-09-05 | 1997-03-25 | Ube Ind Ltd | Inorganic fiber and felt |
| CN101234906A (en) * | 2008-02-28 | 2008-08-06 | 山东红阳耐火保温材料有限公司 | Method for preparing zirconium oxide fiber board |
| CN103306048A (en) * | 2012-03-07 | 2013-09-18 | 福建赛特新材股份有限公司 | Fiber mat, preparation method and core material for vacuum thermal insulation plate |
| CN103320966A (en) * | 2013-07-04 | 2013-09-25 | 厦门大学 | Preparation method for flexible polycrystalline silicon carbide micro-nanofiber mat |
| CN103668779A (en) * | 2013-12-23 | 2014-03-26 | 苏州中宝复合材料有限公司 | Silicon carbide fiber needle felt and manufacturing method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 代少俊: "《高性能纤维复合材料》", 28 February 2013 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108221181A (en) * | 2018-01-03 | 2018-06-29 | 江西嘉捷信达新材料科技有限公司 | The preparation method of special-shaped silicon carbide fibre felt |
| CN108221181B (en) * | 2018-01-03 | 2019-10-01 | 江西嘉捷信达新材料科技有限公司 | The preparation method of special-shaped silicon carbide fibre felt |
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| CN105386237B (en) | 2018-09-21 |
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