CN102690446A - High-damping composite material with multidirectional contained patch board structure and preparation method of composite material - Google Patents
High-damping composite material with multidirectional contained patch board structure and preparation method of composite material Download PDFInfo
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- CN102690446A CN102690446A CN2012101900766A CN201210190076A CN102690446A CN 102690446 A CN102690446 A CN 102690446A CN 2012101900766 A CN2012101900766 A CN 2012101900766A CN 201210190076 A CN201210190076 A CN 201210190076A CN 102690446 A CN102690446 A CN 102690446A
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Abstract
The invention relates to a high-damping composite material with a multidirectional contained patch board structure and a preparation method of the composite material. At present, the damping performance improvements of materials are mostly limited to two method of influencing the glass-transition temperature of the materials and forming a piezoelectric-type polymer through blending inorganic piezoelectric particles and a polymer, and because of the defects of the two methods, the shock absorption damping effect improvement is very limited. According to the invention, the method comprises the following steps of: adding a hard phase damping material and a damping auxiliary material by taking rubber as a base material; mixing fully through a mechanical shearing effect, thus each component fully achieves the dispersion effect of mutual penetration; generating a chemical bond among each material by utilizing a chemical bridging agent, thereby forming the mutual contained patch board structure. According to the invention, different materials are 'bridged' through a chemical additive, and the stable 'patch board structure' is penetrated mutually and is contained multi-directionally, thus the material has the excellent damping effect.
Description
Technical field
The present invention relates to a kind of high damping composite material, be specifically related to the multidirectional wiring board structure high damping composite material and preparation method thereof that pins down.
Background technology
Need consume the vibration that external influence power causes through the damping capacity that improves material in engineering fields such as building, bridges, resist disaster abilities such as collision, earthquake with enhancing building, bridge.The damping mechanism of material is to utilize intramolecule and intermolecular internal friction to give birth to hear rate under external force through material to dissipate, thereby reaches the purpose of damping, power consumption.Therefore, increase material molecule inside and intermolecular internal friction and become the key that improves damping, energy dissipation capacity.
People, obtain good damping, power consumption effect in the hope of the damping capacity that improves material, but are confined to through influencing the damping capacity that material glass transition temperature (Tg) improves material more differing materials research, modification through experiment in recent years.In addition, scientific research institutions such as Tokyo polytechnical university propose piezoelectric ceramics and graphitized carbon black are blended in the material, are prepared into the imagination of piezo-electric type polymkeric substance; The damping mechanism of this imagination is based on the transmission loss between vibration mechanical energy-electric energy-heat energy; Dependency to material self second-order transition temperature is less, can be applied to any polymer materials in theory, can effectively widen the material temperature limit; But owing to do not match between inorganic piezoelectric particles and polymer materials; The consistency of two kinds of storerooms is relatively poor, and the internal friction effect between the two is limited, and is therefore also very limited on raising damping damping.Interact, intert each other through the differing materials chemical bond in recent years; Form the mechanical property (intensity, elongation) that the interspersed structure technology of microcosmic is used for improving material more at material internal; With reduction gas, the perviousness of liquid in material; But be used to improve the material damping performance, particularly chemical bridging agent makes each storeroom possess " the multidirectional wiring board structure that pins down " to improve material damping, damping performance, and what promote material damping power consumption effect does not see document and application report as yet.
Summary of the invention
The purpose of this invention is to provide that a kind of to overcome the material macromole inner and intermolecular internal friction reactive force is little, receive second-order transition temperature to influence multidirectional wiring board structure high damping composite material and preparation method thereof that pins down of defective such as big.
The technical scheme that the present invention adopted is:
The multidirectional wiring board structure high damping composite material that pins down is characterized in that:
Form by the auxilliary material blend of 100 parts by weight of rubber base materials, the hard phase damping material of 35-40 weight part and the damping of 74.2-96.2 weight part; Thorough mixing under mechanical shearing; Reach the dispersion effect that interts each other between component; Utilize 1 weight part chemistry bridging agent between each material, to generate chemical bond, form the wiring board structure that checks and balance.
Described rubber substrate is 70-100 weight part tree elastomer and 0-30 weight part styrene-butadiene rubber(SBR) or cis-1,4-polybutadiene rubber.
It is 90-98 ℃ petroleum resin that described hard phase damping material is chosen fusing point.
Described chemical bridging agent is chosen N-cyclohexyl-2-benzothiazole sulfonamide.
The auxilliary material of described damping includes: 5 part by weight of zinc oxide, 1 weight part Triple Pressed Stearic Acid, 4-8 weight part graphite, 10-15 weight part sericite in powder, 40-50 weight part fine particle carbon black, 1.5 weight part antioxidant Ds, 10-13 weight part machine oil, 1.2 weight part captaxs and 1.5 weight part sulphur.
The described multidirectional preparation method who pins down wiring board structure high damping composite material is characterized in that:
Concrete steps are:
Use two roller mills, roll spacing is transferred to 0.5mm, under 40 ~ 50 ℃, 70-100 weight part tree elastomer was plasticated 3 minutes; Add 0 ~ 30 weight part styrene-butadiene rubber(SBR) or cis-1,4-polybutadiene rubber, blend is even, adds 1.5 weight part antioxidant Ds successively; 40-50 weight part fine particle carbon black treats that temperature adds 5 part by weight of zinc oxide, 1 weight part Triple Pressed Stearic Acid successively when rising to more than 80 ℃; 35-40 weight part petroleum resin, 10-13 weight part machine oil, 4-8 weight part graphite; 10-15 weight part sericite in powder, 1.5 weight part sulphur, 1.2 weight part captaxs; 1 weight part N-cyclohexyl-2-benzothiazole sulfonamide mixes; Park, slice, according to HDR (I) in the transportation industry standard " highway bridge high damping shock insulation rubber bearing "-D250-weight part 10/8 support graph paper conversion steel plate, and the good film of refining at 135 ℃ down through the chemical bridging agent formation test article of between each material, fully building bridge.
The present invention has the following advantages:
High damping composite material of the present invention carries out " bridge formation " through chemical assistant to differing materials and forms Stability Analysis of Structures, mutual interspersed, multidirectional " the wiring board structure " that pins down.When encouraging in external force, material squints between differing materials molecular chain and self and other molecular chain; Because molecule interchain " bridge formation " restraining function; Make to be difficult to produce relative slippage between molecular chain, extraneous mechanical energy can be dissipated in being converted into.These differing mol interchain " bridge formation " are combined closely each storeroom simultaneously, and synergy is given full play to characteristic separately under external force, make material have excellent damping.
Novel high damping composite material described in the invention; Adopt multiple material blend to make; Utilize chemical bridging agent at each storeroom " bridge formation ", the differing mol interchain closely connects through " bridge formation " chemical bond, makes self mechanical characteristic of each material be able to collaborative performance; The power consumption effect of strongthener has significantly improved the material damping performance.Through Guangzhou University's earthquake resistant engineering research centre test, its equivalent damping ratio reaches 23%, is higher than the subsidence ratio of General Purpose Rubber material 2%～4% far away, has fully verified the excellent damping characteristic of high damping composite material of the present invention.
Description of drawings
Fig. 1 is the multidirectional wiring board structure iron that pins down.
Fig. 2 is the multidirectional wiring board sectional view that pins down.
Fig. 3 is that the ability of sample under level is back and forth sheared consumes hysteresis loop.
Embodiment
Below in conjunction with embodiment the present invention is carried out detailed explanation.
The multidirectional preparation method who pins down wiring board structure high damping composite material of the present invention; Form by rubber substrate, hard phase damping material and the auxilliary material blend of damping; Thorough mixing under mechanical shearing reaches the dispersion effect that interts each other between component, utilizes chemical bridging agent between each material, to generate chemical bond; The wiring board structure that formation checks and balance is referring to multidirectional wiring board structure and the sectional view of pining down of Fig. 1.Wherein, rubber substrate is selected from tree elastomer, styrene-butadiene rubber(SBR), cis-1,4-polybutadiene rubber; It is 90-98 ℃ petroleum resin that hard phase damping material is chosen fusing point; The chemistry bridging agent is chosen N-cyclohexyl-2-benzothiazole sulfonamide; The auxilliary material of damping includes: the zinc oxide, the Triple Pressed Stearic Acid that rubber substrate are played activation; Can better improve graphite, sericite in powder, the fine particle carbon black of elastomeric material damping capacity; Can promote the antioxidant D of the heat-resisting oxygen of elastomeric material, weather, fatigure failure performance; Improve the machine oil of sizing material mixing behavior; The vulcanization of rubber is with captax and sulphur.
Embodiment one:
Use two roller mills, roll spacing is transferred to 0.5mm, under 40 ℃, the 100g tree elastomer was plasticated 3 minutes; Add the 1.5g antioxidant D successively, 40g fine particle carbon black treats that temperature adds 5g zinc oxide successively when rising to more than 80 ℃; The 1g Triple Pressed Stearic Acid, 35g petroleum resin, 10g machine oil; 4g graphite, 10g sericite in powder, 1.5g sulphur; 1.2g captax, 1gN-cyclohexyl-2-benzothiazole sulfonamide mixes, and parks, slice; According to HDR (I) in the transportation industry standard " highway bridge high damping shock insulation rubber bearing "-D250-G10/8 support graph paper conversion steel plate, and the good film of refining forms test article through chemical bridging agent abundant bridge formation between each material down at 135 ℃.
Embodiment two:
Use two roller mills, roll spacing is transferred to 0.5mm, under 40 ℃, the 85g tree elastomer was plasticated 3 minutes, add 15g styrene-butadiene rubber(SBR); Blend is even, adds the 1.5g antioxidant D successively, 40g fine particle carbon black; Treat that temperature adds 5g zinc oxide when rising to more than 80 ℃ successively, 1g Triple Pressed Stearic Acid, 35g petroleum resin; 10g machine oil, 4g graphite, 10g sericite in powder; 1.5g sulphur, the 1.2g captax, 1gN-cyclohexyl-2-benzothiazole sulfonamide mixes; Park, slice, according to HDR (I) in the transportation industry standard " highway bridge high damping shock insulation rubber bearing "-D250-G10/8 support graph paper conversion steel plate, and the good film of refining at 135 ℃ down through the chemical bridging agent formation test article of between each material, fully building bridge.
Embodiment three:
Use two roller mills, roll spacing is transferred to 0.5mm, under 40 ℃, the 85g tree elastomer was plasticated 3 minutes, add the 15g cis-1,4-polybutadiene rubber; Blend is even, adds the 1.5g antioxidant D successively, 40g fine particle carbon black; Treat that temperature adds 5g zinc oxide when rising to more than 80 ℃ successively, 1g Triple Pressed Stearic Acid, 35g petroleum resin; 10g machine oil, 4g graphite, 10g sericite in powder; 1.5g sulphur, the 1.2g captax, 1gN-cyclohexyl-2-benzothiazole sulfonamide mixes; Park, slice, according to HDR (I) in the transportation industry standard " highway bridge high damping shock insulation rubber bearing "-D250-G10/8 support graph paper conversion steel plate, and the good film of refining at 135 ℃ down through the chemical bridging agent formation test article of between each material, fully building bridge.
Embodiment four:
Use two roller mills, roll spacing is transferred to 0.5mm, under 45 ℃, the 100g tree elastomer was plasticated 3 minutes; Add the 1.5g antioxidant D successively, 45g fine particle carbon black treats that temperature adds 5g zinc oxide successively when rising to more than 80 ℃; The 1g Triple Pressed Stearic Acid, 37g petroleum resin, 12g machine oil; 6g graphite, 12g sericite in powder, 1.5g sulphur; 1.2g captax, 1gN-cyclohexyl-2-benzothiazole sulfonamide mixes, and parks, slice; According to HDR (I) in the transportation industry standard " highway bridge high damping shock insulation rubber bearing "-D250-G10/8 support graph paper conversion steel plate, and the good film of refining forms test article through chemical bridging agent abundant bridge formation between each material down at 135 ℃.
Embodiment five:
Use two roller mills, roll spacing is transferred to 0.5mm, under 45 ℃, the 85g tree elastomer was plasticated 3 minutes, add 15g styrene-butadiene rubber(SBR); Blend is even, adds the 1.5g antioxidant D successively, 45g fine particle carbon black; Treat that temperature adds 5g zinc oxide when rising to more than 80 ℃ successively, 1g Triple Pressed Stearic Acid, 37g petroleum resin; 12g machine oil, 6g graphite, 12g sericite in powder; 1.5g sulphur, the 1.2g captax, 1gN-cyclohexyl-2-benzothiazole sulfonamide mixes; Park, slice, according to HDR (I) in the transportation industry standard " highway bridge high damping shock insulation rubber bearing "-D250-G10/8 support graph paper conversion steel plate, and the good film of refining at 135 ℃ down through the chemical bridging agent formation test article of between each material, fully building bridge.
Embodiment six:
Use two roller mills, roll spacing is transferred to 0.5mm, under 45 ℃, the 85g tree elastomer was plasticated 3 minutes, add the 15g cis-1,4-polybutadiene rubber; Blend is even, adds the 1.5g antioxidant D successively, 45g fine particle carbon black; Treat that temperature adds 5g zinc oxide when rising to more than 80 ℃ successively, 1g Triple Pressed Stearic Acid, 37g petroleum resin; 12g machine oil, 6g graphite, 12g sericite in powder; 1.5g sulphur, the 1.2g captax, 1gN-cyclohexyl-2-benzothiazole sulfonamide mixes; Park, slice, according to HDR (I) in the transportation industry standard " highway bridge high damping shock insulation rubber bearing "-D250-G10/8 support graph paper conversion steel plate, and the good film of refining at 135 ℃ down through the chemical bridging agent formation test article of between each material, fully building bridge.
Embodiment seven:
Use two roller mills, roll spacing is transferred to 0.5mm, under 50 ℃, the 100g tree elastomer was plasticated 3 minutes; Add the 1.5g antioxidant D successively, 50g fine particle carbon black treats that temperature adds 5g zinc oxide successively when rising to more than 80 ℃; The 1g Triple Pressed Stearic Acid, 40g petroleum resin, 13g machine oil; 8g graphite, 15g sericite in powder, 1.5g sulphur; 1.2g captax, 1gN-cyclohexyl-2-benzothiazole sulfonamide mixes, and parks, slice; According to HDR (I) in the transportation industry standard " highway bridge high damping shock insulation rubber bearing "-D250-G10/8 support graph paper conversion steel plate, and the good film of refining forms test article through chemical bridging agent abundant bridge formation between each material down at 135 ℃.
Embodiment eight:
Use two roller mills, roll spacing is transferred to 0.5mm, under 50 ℃, the 85g tree elastomer was plasticated 3 minutes, add 15g styrene-butadiene rubber(SBR); Blend is even, adds the 1.5g antioxidant D successively, 50g fine particle carbon black; Treat that temperature adds 5g zinc oxide when rising to more than 80 ℃ successively, 1g Triple Pressed Stearic Acid, 40g petroleum resin; 13g machine oil, 8g graphite, 15g sericite in powder; 1.5g sulphur, the 1.2g captax, 1gN-cyclohexyl-2-benzothiazole sulfonamide mixes; Park, slice, according to HDR (I) in the transportation industry standard " highway bridge high damping shock insulation rubber bearing "-D250-G10/8 support graph paper conversion steel plate, and the good film of refining at 135 ℃ down through the chemical bridging agent formation test article of between each material, fully building bridge.
Embodiment nine:
Use two roller mills, roll spacing is transferred to 0.5mm, under 50 ℃, the 85g tree elastomer was plasticated 3 minutes, add the 15g cis-1,4-polybutadiene rubber; Blend is even, adds the 1.5g antioxidant D successively, 50g fine particle carbon black; Treat that temperature adds 5g zinc oxide when rising to more than 80 ℃ successively, 1g Triple Pressed Stearic Acid, 40g petroleum resin; 13g machine oil, 8g graphite, 15g sericite in powder; 1.5g sulphur, the 1.2g captax, 1gN-cyclohexyl-2-benzothiazole sulfonamide mixes; Park, slice, according to HDR (I) in the transportation industry standard " highway bridge high damping shock insulation rubber bearing "-D250-G10/8 support graph paper conversion steel plate, and the good film of refining at 135 ℃ down through the chemical bridging agent formation test article of between each material, fully building bridge.
Sample carries out performance measurement in Guangzhou University earthquake resistant engineering research centre according to GB20688, measures " Mechanics Performance Testing as a result the table " of result referring to " alternative document ", and the ability of the sample of Fig. 3 under level is back and forth sheared consumes hysteresis loop.
The equivalent damping ratio calculating method is:
Test report sees the following form:
Can see equivalent damping ratio (h from test report
Eq) test result reached 23%; The equivalent damping ratio that is higher than General Purpose Rubber material 2% ~ 4% far away; The elastomeric material of this patented invention has played breakthrough lifting on material self damping capacity, be far superior to domestic colleague; Slightly be superior to the leading level in the world, be widely used in building, in the vibration damping of bridge, machinery, energy-dissipating device.
Claims (6)
1. the multidirectional wiring board structure high damping composite material that pins down is characterized in that:
Form by the auxilliary material blend of 100 parts by weight of rubber base materials, the hard phase damping material of 35-40 weight part and the damping of 74.2-96.2 weight part; Thorough mixing under mechanical shearing; Reach the dispersion effect that interts each other between component; Utilize 1 weight part chemistry bridging agent between each material, to generate chemical bond, form the wiring board structure that checks and balance.
2. the multidirectional wiring board structure high damping composite material that pins down according to claim 1 is characterized in that:
Described rubber substrate is 70-100 weight part tree elastomer and 0-30 weight part styrene-butadiene rubber(SBR) or cis-1,4-polybutadiene rubber.
3. the multidirectional wiring board structure high damping composite material that pins down according to claim 1 and 2 is characterized in that:
It is 90-98 ℃ petroleum resin that described hard phase damping material is chosen fusing point.
4. the multidirectional wiring board structure high damping composite material that pins down according to claim 3 is characterized in that:
Described chemical bridging agent is chosen N-cyclohexyl-2-benzothiazole sulfonamide.
5. the multidirectional wiring board structure high damping composite material that pins down according to claim 4 is characterized in that:
The auxilliary material of described damping includes: 5 part by weight of zinc oxide, 1 weight part Triple Pressed Stearic Acid, 4-8 weight part graphite, 10-15 weight part sericite in powder, 40-50 weight part fine particle carbon black, 1.5 weight part antioxidant Ds, 10-13 weight part machine oil, 1.2 weight part captaxs and 1.5 weight part sulphur.
6. the multidirectional preparation method who pins down wiring board structure high damping composite material according to claim 1 is characterized in that:
Concrete steps are:
Use two roller mills, roll spacing is transferred to 0.5mm, under 40 ~ 50 ℃, 70-100 weight part tree elastomer was plasticated 3 minutes; Add 0 ~ 30 weight part styrene-butadiene rubber(SBR) or cis-1,4-polybutadiene rubber, blend is even, adds 1.5 weight part antioxidant Ds successively; 40-50 weight part fine particle carbon black treats that temperature adds 5 part by weight of zinc oxide, 1 weight part Triple Pressed Stearic Acid successively when rising to more than 80 ℃; 35-40 weight part petroleum resin, 10-13 weight part machine oil, 4-8 weight part graphite; 10-15 weight part sericite in powder, 1.5 weight part sulphur, 1.2 weight part captaxs; 1 weight part N-cyclohexyl-2-benzothiazole sulfonamide mixes; Park, slice, according to HDR (I) in the transportation industry standard " highway bridge high damping shock insulation rubber bearing "-D250-weight part 10/8 support graph paper conversion steel plate, and the good film of refining at 135 ℃ down through the chemical bridging agent formation test article of between each material, fully building bridge.
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| CN201210190076.6A CN102690446B (en) | 2012-06-11 | 2012-06-11 | High-damping composite material with multidirectional contained patch board structure and preparation method of composite material |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103194010A (en) * | 2013-04-02 | 2013-07-10 | 华东理工大学 | Damping material based on blending of butyl rubber and natural rubber and preparation method thereof |
| CN103205029A (en) * | 2013-05-15 | 2013-07-17 | 衡水中铁建工程橡胶有限责任公司 | Ultra-high damping rubber composite material and preparation process of rubber composite material |
| CN103289153A (en) * | 2013-06-24 | 2013-09-11 | 苏州新区佳合塑胶有限公司 | Modified damping styrene butadiene rubber and preparation method thereof |
| CN103467787A (en) * | 2013-06-24 | 2013-12-25 | 西安汉华橡胶科技有限公司 | Formula of nano-zinc oxide and rubber composite vibration absorption rubber material |
| CN103739894A (en) * | 2013-12-20 | 2014-04-23 | 广西科技大学 | High-damping rubber bearing |
| CN104877191A (en) * | 2015-06-19 | 2015-09-02 | 成都职业技术学院 | Damping rubber with low cost and high damping performance and manufacturing method thereof |
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| CN85100715A (en) * | 1985-04-01 | 1986-08-27 | 中国科学院声学研究所 | Semi-solid damping material |
| CN1245512A (en) * | 1997-01-22 | 2000-02-23 | 横滨橡胶株式会社 | Rubber composition for seismic isolation laminates |
| CN101691119A (en) * | 2009-09-18 | 2010-04-07 | 广州市延昌新型塑胶制品有限公司 | High speed train damping sound insulation sheet material and manufacturing method thereof |
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Patent Citations (3)
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| CN85100715A (en) * | 1985-04-01 | 1986-08-27 | 中国科学院声学研究所 | Semi-solid damping material |
| CN1245512A (en) * | 1997-01-22 | 2000-02-23 | 横滨橡胶株式会社 | Rubber composition for seismic isolation laminates |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103194010A (en) * | 2013-04-02 | 2013-07-10 | 华东理工大学 | Damping material based on blending of butyl rubber and natural rubber and preparation method thereof |
| CN103194010B (en) * | 2013-04-02 | 2015-07-15 | 华东理工大学 | Damping material based on blending of butyl rubber and natural rubber and preparation method thereof |
| CN103205029A (en) * | 2013-05-15 | 2013-07-17 | 衡水中铁建工程橡胶有限责任公司 | Ultra-high damping rubber composite material and preparation process of rubber composite material |
| CN103205029B (en) * | 2013-05-15 | 2015-04-01 | 衡水中铁建工程橡胶有限责任公司 | Ultra-high damping rubber composite material and preparation process of rubber composite material |
| CN103289153A (en) * | 2013-06-24 | 2013-09-11 | 苏州新区佳合塑胶有限公司 | Modified damping styrene butadiene rubber and preparation method thereof |
| CN103467787A (en) * | 2013-06-24 | 2013-12-25 | 西安汉华橡胶科技有限公司 | Formula of nano-zinc oxide and rubber composite vibration absorption rubber material |
| CN103289153B (en) * | 2013-06-24 | 2015-03-18 | 苏州新区佳合塑胶有限公司 | Modified damping styrene butadiene rubber and preparation method thereof |
| CN103739894A (en) * | 2013-12-20 | 2014-04-23 | 广西科技大学 | High-damping rubber bearing |
| CN104877191A (en) * | 2015-06-19 | 2015-09-02 | 成都职业技术学院 | Damping rubber with low cost and high damping performance and manufacturing method thereof |
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| CN102690446B (en) | 2014-07-23 |
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Effective date of registration: 20140430 Address after: 710065 No. 205, No. four, science and Technology Development Zone, Xi'an hi tech Development Zone, Shaanxi Applicant after: CCCC Civil Engineering Science & Technology Co., Ltd. Address before: 710075 Xi'an hi tech Development Zone, Shaanxi science and technology No. two road, No. 63 Applicant before: CCCC First Highway Consultants Co., Ltd. Applicant before: CCCC Civil Engineering Science & Technology Co., Ltd. |
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Inventor after: Ge Shengjin Inventor after: Zhao Qiuhua Inventor after: Li Xiang Inventor after: Yao Wenqi Inventor after: Wang Fu Inventor after: Di Mingang Inventor after: Pan Changping Inventor after: Wang Mingtian Inventor after: Wang Wei Inventor after: Peng Zeyou Inventor after: Gao Shan Inventor after: Lv Xiaoxia Inventor after: Zou Shun Inventor before: Wang Shuangjie Inventor before: Lv Xiaoxia Inventor before: Yu Chengyun Inventor before: Qi Fei Inventor before: Ge Shengjin Inventor before: Zhao Yongguo Inventor before: Yang Gaochao Inventor before: Wang Wei Inventor before: Pan Changping Inventor before: Peng Zeyou Inventor before: Wang Mingtian Inventor before: Gai Weipeng |
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Free format text: CORRECT: INVENTOR; FROM: WANG SHUANGJIE GE SHENGJIN ZHAO YONGGUO YANG GAOCHAO WANG WEI PAN CHANGPING PENG ZEYOU WANG MINGTIAN GAI WEIPENG LV XIAOXIA YU CHENGYUN QI FEI TO: GE SHENGJIN ZHAI MINGANG PAN CHANGPING WANG MINGTIAN WANG WEI PENG ZEYOU GAO SHAN LV XIAOXIA ZOU SHUN ZHAO QIUHUA LI XIANG YAO WENQI WANG FU |
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