WO2018036427A1 - 一种高阻气性能的复合硅酮密封胶及其制备方法 - Google Patents

一种高阻气性能的复合硅酮密封胶及其制备方法 Download PDF

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WO2018036427A1
WO2018036427A1 PCT/CN2017/098068 CN2017098068W WO2018036427A1 WO 2018036427 A1 WO2018036427 A1 WO 2018036427A1 CN 2017098068 W CN2017098068 W CN 2017098068W WO 2018036427 A1 WO2018036427 A1 WO 2018036427A1
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parts
graphene
component
silicone sealant
composite silicone
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French (fr)
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段曦东
赵涛楠
毛志浩
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广东纳路纳米科技有限公司
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Definitions

  • the invention relates to the technical field of materials, in particular to a composite silicone sealant with high gas barrier properties and a preparation method thereof.
  • Insulating glass has good air tightness, water tightness and good thermal insulation function.
  • Low-E hollow glass is made up of double glazing, low radiant silver plating film and inert gas. It has Low-E glass and hollow. The dual characteristics of glass, with good daylighting, and no "light pollution", have a very prominent role in heat insulation and UV protection, is a true green, energy-saving, environmentally friendly glass building materials.
  • Insulating glass insulation, sound insulation and frost protection are achieved by a sealed, dry hollow layer inside.
  • the main problem of insulating glass in China is that the quality is not guaranteed, and the service life is short.
  • condensation or frosting of the insulating glass occurs, resulting in failure of the insulating glass.
  • More than 90% of the failure of the insulating glass is caused by the failure of the seal.
  • the failure of the seal is mainly caused by the unreasonable design of the sealing structure, the incomplete sealing of the sealant or the aging. Therefore, on the basis of determining the sealing structure, the choice of sealant plays an important role in prolonging the service life of the insulating glass.
  • Silicone sealant not only has good weather resistance and structural stability, but also does not decompose under long-term ultraviolet radiation. It can maintain excellent adhesion and strength under the action of high temperature or low temperature and water vapor, and it is excellent. The rate of elastic recovery.
  • the disadvantage of the existing silicone sealant product is that the gas permeability coefficient is large (about 10-15 g/m 2 ⁇ d), so that the gas easily permeates and diffuses through the sealant layer to the hollow glass hollow layer, and the time will appear for a long time. Condensation or frosting, which affects the service life of the insulating glass.
  • the present invention adopts the following technical solutions:
  • the invention adopts 5-10 layers of graphene oxide, surface treated graphene or white graphene type two-dimensional layered nano material to modify the silicone sealant, so that the barrier property and mechanical strength are greatly improved and other properties are improved. Not affected.
  • the component A comprises: parts by mass: 100 parts base glue, 0.01-10 parts nano material powder, 40-100 parts filler, 5-10 parts silane coupling agent;
  • the component B comprises: 10-20 parts by weight of a crosslinking agent, 10-30 parts of a plasticizer, 0.1-2 parts of a catalyst;
  • the weight ratio of the component A to the component B is 10 to 13:1;
  • the base glue comprises a hydroxyl terminated polydimethylsiloxane, a hydroxyl terminated polymethylphenylsiloxane, an alkoxy terminated polydimethylsiloxane, a vinyl terminated polydimethyl group.
  • a siloxane allyl silicon-terminated polydimethylsiloxane
  • the nano material powder comprises 5-10 layers of graphene oxide, modified graphene or modified white graphene. One of them.
  • the base glue is selected from a hydroxyl terminated polydimethylsiloxane having a viscosity of 50,000 to 80,000 cP.
  • the surfactant used for modifying the graphene includes sodium dodecyl sulfate, sodium dodecylbenzenesulfonate, polyvinyl alcohol, sodium lignosulfonate, and cetyltrimethyl One of ammonium bromide and polyvinylpyrrolidone;
  • the surfactant used for modifying white graphene is a long-chain Lewis base, a long-chain Lewis acid, a quaternary ammonium compound, a sulfonate, and a nonionic surfactant. One of them.
  • the long-chain Lewis base is an amine
  • the long-chain Lewis acid is a borane
  • the quaternary ammonium compound is an alkyltrimethyl quaternary ammonium salt, an alkyldimethylbenzyl quaternary ammonium salt, One of dialkyl dimethyl quaternary ammonium salts
  • the sulfonate is sodium dodecyl benzene sulfonate, sodium dodecyl sulfonate, sodium lignosulfonate, sodium glycocholate
  • the nonionic surfactant is one of a polyether, a polyester, a polyvinyl alcohol, and a cellulose derivative.
  • the plasticizer is selected from 201 methyl silicone oil having a viscosity of 100 to 500 cP.
  • the catalyst is selected from the group consisting of dibutyltin diacetate, dibutyltin dilaurate, and dibutyltin oxide.
  • a method for preparing a composite silicone sealant with high gas barrier properties comprising:
  • Step 2) Preparation of component A: stirring the base rubber, the nano material powder, the filler, and the silane coupling agent in a kneader or a planetary mixer;
  • component B Preparation of component B: adding a crosslinking agent, a plasticizer and a catalyst to a planetary mixer and stirring uniformly under a negative pressure of a pressure of -0.06 to -0.099 MPa;
  • the silicone sealant of the present invention is obtained by mixing the two components A and B in a predetermined ratio at room temperature.
  • Modified graphene, graphene oxide or modified white graphene has good barrier gas properties and high strength. A small amount of addition can greatly improve the barrier properties and mechanical strength of silicone sealant while other properties are not Affected;
  • the silicone sealant of the present invention is mainly used for the two-way sealing of the insulating glass, and has good compatibility with the butyl rubber used for the first sealing of the insulating glass;
  • the invention has good processing properties and is environmentally friendly.
  • Step 1) Preparation of modified graphene: 5-10 layers of graphene were immersed in an aqueous solution of sodium dodecyl sulfate having a mass concentration of 0.1% for 24 hours, and vacuum-dried at 50 ° C for 48 hours to obtain modified graphene.
  • Step 2) Component A: 100 parts by mass of dihydroxy polydimethylsiloxane, in step 1) The obtained 2 parts of modified graphene, 5 parts of fumed silica, 55 parts of nano-active calcium carbonate, and 8 parts of ⁇ -aminopropyltriethoxysilane are added and stirred uniformly in a kneader;
  • Component B 10 parts by mass of methyltrimethoxysilane, 20 parts of 201 methyl silicone oil, 0.1 part of dibutyltin diacetate are added to a high speed planetary mixer, and stirred uniformly under a negative pressure of -0.08 MPa;
  • the silicone sealant of the present invention is obtained by mixing the A and B components at a weight ratio of 11:1 at room temperature.
  • Step 1) Preparation of modified graphene: 5-10 layers of graphene were immersed in a 0.1% by mass aqueous solution of polyvinylpyrrolidone for 24 hours, and vacuum dried at 50 ° C for 48 hours to obtain modified graphene.
  • Step 2) Component A: 100 parts by mass of dihydroxypolydimethylsiloxane, 5 parts of modified graphene obtained in step 1), 5 parts of fumed silica, and 75 parts of nanometers Activated calcium carbonate, 10 parts of ⁇ -aminopropyltriethoxysilane is added to the kneader and stirred uniformly;
  • Component B adding 12 parts by weight of methyltrimethoxysilane, 30 parts of 201 methyl silicone oil, and 0.2 parts of dibutyltin diacetate to a planetary mixer, and stirring uniformly under a negative pressure of -0.08 MPa;
  • the silicone sealant of the present invention is obtained by mixing the A and B components at a weight ratio of 11:1 at room temperature.
  • Step 1) Preparation of modified white graphene: 5-10 layers of white graphene were immersed in a 0.1% long-chain borane aqueous solution for 24 hours, and vacuum dried at 50 ° C for 48 hours to obtain modified white graphene.
  • Step 2) Component A: 100 parts by mass of dihydroxy polymethylphenylsiloxane, 2 parts of modified white graphene obtained in step 1), 5 parts of quartz powder, and 60 parts of light Calcium carbonate, 9 parts of ⁇ -(2,3-epoxypropoxy)propyltrimethoxysilane is added to the kneader and stirred uniformly;
  • Component B 10 parts by mass of methyltris(dialkyldifluorene)silane, 25 parts of 201 methyl silicone oil, 0.1 part of dibutyltin dilaurate added to the planetary mixer at -0.09 MPa negative Press and mix evenly;
  • the silicone sealant of the present invention is obtained by mixing A and B components at a weight ratio of 12:1 at room temperature.
  • Step 1) Preparation of modified white graphene: 5-10 layers of white graphene were soaked in 0.1% aqueous oleylamine solution for 24 hours, and vacuum dried at 50 ° C for 48 hours to obtain modified white graphene.
  • Step 2) Component A: 100 parts by mass of dihydroxy polymethylphenylsiloxane, 5 parts of modified white graphene obtained in step 1), 5 parts of quartz powder, and 80 parts of light Calcium carbonate, 10 parts of ⁇ -(2,3-epoxypropoxy)propyltrimethoxysilane is added to the kneader and stirred evenly;
  • Component B 13 parts by mass of methyltris(dialkyldifluorene)silane, 30 parts of 201 methyl silicone oil, 0.2 parts of dibutyltin dilaurate added to the planetary mixer at -0.09 MPa negative Press and mix evenly;
  • the silicone sealant of the present invention is obtained by mixing A and B components at a weight ratio of 12:1 at room temperature.
  • Component A 100 parts by mass of alkoxy-terminated polydimethylsiloxane, 2 parts of graphene oxide, 70 parts of nano-active calcium carbonate, and 9 parts of N-( ⁇ -aminoethyl )- ⁇ -aminopropyltrimethoxysilane is added uniformly in a kneader;
  • Component B 10 parts by mass of vinyltrimethoxysilane, 25 parts of 201 methyl silicone oil, and 0.2 parts of dibutyltin oxide were added to a planetary mixer and stirred uniformly under a negative pressure of -0.09 MPa;
  • the silicone sealant of the present invention is obtained by mixing the two components A and B at a weight ratio of 12:1 at room temperature.
  • Component B 14 parts by mass of vinyltrimethoxysilane, 30 parts of 201 methyl silicone oil, 0.2 parts of dibutyltin oxide were added to a planetary mixer, and stirred under a negative pressure of -0.09 MPa;
  • the silicone sealant of the present invention is obtained by mixing A and B components at a weight ratio of 12:1 at room temperature.
  • Component A 100 parts by weight of dihydroxy polydimethylsiloxane, 80 parts of nano-active calcium carbonate, and 10 parts of N-( ⁇ -aminoethyl)- ⁇ -aminopropyltrimethoxy
  • the silane is added to the kneader and stirred evenly;
  • Component B 10 parts by mass of vinyltrimethoxysilane, 30 parts of 201 methyl silicone oil, 0.2 parts of dibutyltin oxide were added to a planetary mixer, and stirred under a negative pressure of -0.09 MPa;
  • the silicone sealant of the present invention is obtained by mixing A and B components at a weight ratio of 12:1 at room temperature.
  • Table 1 shows the parameters of the composite silicone sealant of the present invention having high gas barrier properties prepared in Examples 1-6:
  • the preparation method of the present invention can greatly improve the barrier properties and mechanical strength of the silicone sealant.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Engineering & Computer Science (AREA)
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  • Physics & Mathematics (AREA)
  • Inorganic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Thermal Sciences (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Sealing Material Composition (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

本发明涉及材料技术领域，具体公开了一种高阻气性能的复合硅酮密封胶，包括A组份和B组份；所述A组份包括质量份数为：100份基础胶、0.01-10份纳米材料粉体、40-100份填料、5-10份硅烷偶联剂；所述B组份包括质量份数为：10-20份交联剂、10-30份增塑剂、0.1-2份催化剂；A组份与B组份重量比为10～13:1；所述纳米材料粉体包括5-10层的氧化石墨烯、改性石墨烯或改性白石墨烯中的一种。本发明少量添加5-10层的氧化石墨烯、改性石墨烯或改性白石墨烯即能大幅度提高硅酮密封胶的阻隔性能和机械强度而其他性能不受影响；本发明的硅酮密封胶用于中空玻璃的二道密封，与一道密封所用的丁基胶相容性良好，并具有良好的加工性能，对环境友好。

Description

一种高阻气性能的复合硅酮密封胶及其制备方法 技术领域
本发明涉及材料技术领域，具体涉及一种高阻气性能的复合硅酮密封胶及其制备方法。
背景技术
随着国家对节能材料的重视及人们环境意识的增强，中空玻璃在建材装饰、节能车辆及制冷设备等方面的应用日趋广泛，同时对其质量的要求也越来越高。中空玻璃具有良好的气密性、水密性和良好的隔热保温功能，尤其是Low-E中空玻璃由双层玻璃、低辐射镀银膜、惰性气体组合而成，具有Low-E玻璃和中空玻璃的双重特点，具备良好的采光性，同时没有“光污染”，对于隔热和防紫外线均具有非常突出的作用，是真正意义上的绿色、节能、环保玻璃建材。
中空玻璃隔热、隔音、防霜雾是通过其内部一层密封、干燥的中空层来实现的。目前我国中空玻璃的主要问题是质量没有保证，寿命短，使用一年或几年后中空玻璃出现结露或结霜，导致中空玻璃失效。90％以上的中空玻璃失效是由密封失败引起的，密封失败主要是由于密封结构设计不合理、密封胶密封不彻底或老化引起的。因此，在确定密封结构基础上，密封胶的选择对延长中空玻璃的使用寿命具有重要的作用。
目前中空玻璃主要采用双道密封法：一道密封承担着抵御水蒸气渗透的有效密封，目前主要采用热熔丁基密封胶；二道密封胶在具备良好的玻璃粘结性能基础上，还必须具有良好的机械性能，主要材料有三种：聚硫胶、硅酮胶和聚氨酯胶。聚硫胶虽然有较好的结构强度和耐高低温性能，且气密性能优于硅酮胶，但其耐紫外性能差，长期在阳光照射下易老化，影响使用寿命。聚氨酯 胶各项性能都比较适中，但施工工艺复杂，对施工的温湿度要求较高，因此目前在中空玻璃中应用较少。硅酮密封胶不但具有良好的耐候性和结构稳定性，而且在长期的紫外线照射下不会分解，在高温或低温及水汽的反复作用下仍能保持优异的粘结性和强度，以及极好的弹性恢复率。但是现有硅酮密封胶产品的缺点是气体渗透系数较大(约为10～15g/m2·d)，这样气体容易透过密封胶层向中空玻璃中空层渗透扩散，时间一长会出现结露或结霜，从而影响中空玻璃的使用寿命。
发明内容
有鉴于此，有必要针对上述的问题，提供一种简单有效的提高中空玻璃用硅酮胶阻气性能的复合硅酮密封胶及其制备方法。
为实现上述目的，本发明采取以下技术方案：
本发明采用5-10层的氧化石墨烯、表面处理过的石墨烯或白石墨烯类二维层状纳米材料对硅酮密封胶进行改性，使其阻隔性能和机械强度大大提高而其他性能不受影响。
本发明高阻气性能的复合硅酮密封胶，包括A组分和B组分；
所述A组份包括质量份数为：100份基础胶、0.01-10份纳米材料粉体、40-100份填料、5-10份硅烷偶联剂；
所述B组份包括质量份数为：10-20份交联剂、10-30份增塑剂、0.1-2份催化剂；
所述A组份与B组份重量比为10～13:1；
所述的基础胶包括羟基封端聚二甲基硅氧烷、羟基封端聚甲基苯基硅氧烷、烷氧基封端聚二甲基硅氧烷、乙烯基封端聚二甲基硅氧烷、烯丙基硅基封端聚二甲基硅氧烷中的一种；
所述纳米材料粉体包括5-10层的氧化石墨烯、改性石墨烯或改性白石墨烯 中的一种。
进一步的，所述基础胶选自粘度为50000～80000cP的羟基封端聚二甲基硅氧烷。
进一步的，所述改性石墨烯或改性白石墨烯，是由石墨烯或者白石墨烯，在质量浓度为0.1％的表面活性剂水溶液浸泡24h，50℃真空干燥48h制备获得。
进一步的，对所述石墨烯进行改性使用的表面活性剂包括十二烷基磺酸钠、十二烷基苯磺酸钠、聚乙烯醇、木质素磺酸钠、十六烷基三甲基溴化铵、聚乙烯吡咯烷酮等中的一种；对白石墨烯进行改性使用的表面活性剂为长链路易斯碱、长链路易斯酸、季铵化物、磺酸化物、非离子型表面活性剂中的一种。
进一步的，所述长链路易斯碱为胺类；所述长链路易斯酸为硼烷类；所述季铵化物为烷基三甲基季铵盐、烷基二甲基苄基季铵盐、二烷基二甲基季铵盐中的一种；所述磺酸化物为十二烷基苯磺酸钠、十二烷基磺酸钠、木质素磺酸钠、甘胆酸钠中的一种；所述非离子型表面活性剂为聚醚、聚酯、聚乙烯醇、纤维素衍生物中的一种。
进一步的，所述填料选自气相白炭黑、石英粉、滑石粉、重质碳酸钙、轻质碳酸钙、纳米活性碳酸钙、蒙脱石、硅藻土中的至少一种。
进一步的，所述硅烷偶联剂选自γ―氨丙基三乙氧基硅烷、γ―(2,3-环氧丙氧)丙基三甲氧基硅烷、γ―甲基丙烯酰氧基丙基三甲氧基硅烷、N-(β-氨乙基)-γ-氨丙基三甲氧基硅烷中的至少一种。
进一步的，所述交联剂选自甲基三甲氧基硅烷、甲基三(二烷基二肟)硅烷、乙烯基三甲氧基硅烷中的一种。
进一步的，所述的增塑剂选自粘度为100～500cP的201甲基硅油。
进一步的，所述的催化剂选自二丁基二醋酸锡、二丁基二月桂酸锡、二丁基氧化锡中的一种。
一种高阻气性能的复合硅酮密封胶的制备方法，包括：
步骤1)选用纳米材料粉体为：5-10层的氧化石墨烯、经表面活性剂处理得到的改性石墨烯或改性白石墨烯中的一种；
步骤2)A组分的制备：将基础胶、纳米材料粉体、填料、硅烷偶联剂在捏合机或行星搅拌机内搅拌均匀；
B组分的制备：将交联剂、增塑剂、催化剂加入行星搅拌机在压力为-0.06～-0.099MPa的负压下搅拌均匀；
在室温下，将A、B两组分按规定比例混合后即得本发明的硅酮密封胶。
本发明的有益效果为：
(1)改性石墨烯、氧化石墨烯或改性白石墨烯有良好的隔离气体的性能和高的强度，少量添加即能大幅度提高硅酮密封胶的阻隔性能和机械强度而其他性能不受影响；
(2)本发明的硅酮密封胶主要用于中空玻璃的二道密封，与中空玻璃第一道密封所用的丁基胶相容性良好；
(3)本发明具有良好的加工性能，对环境友好。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚，下面将结合本发明实施例，对本发明的技术方案作进一步清楚、完整地描述。需要说明的是，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
实施例1
步骤1)改性石墨烯的制备：将5-10层的石墨烯用质量浓度为0.1％的十二烷基磺酸钠水溶液浸泡24h，50℃真空干燥48h，得到改性石墨烯。
步骤2)A组分：将质量份为100份的二羟基聚二甲基硅氧烷、步骤1)中 得到的2份的改性石墨烯、5份的气相白炭黑、55份的纳米活性碳酸钙、8份的γ―氨丙基三乙氧基硅烷加入在捏合机中搅拌均匀；
B组分：将质量份为10份的甲基三甲氧基硅烷、20份的201甲基硅油、0.1份的二丁基二醋酸锡加入高速行星搅拌机，在-0.08MPa负压下搅拌均匀；
在室温下，将A、B两组份按重量比11:1混合后即得本发明的硅酮密封胶。
实施例2
步骤1)改性石墨烯的制备：将5-10层的石墨烯用0.1％质量浓度的聚乙烯吡咯烷酮水溶液浸泡24h，50℃真空干燥48h，得到改性石墨烯。
步骤2)A组分：将质量份为100份的二羟基聚二甲基硅氧烷、步骤1)中得到的5份的改性石墨烯、5份的气相白炭黑、75份的纳米活性碳酸钙、10份的γ―氨丙基三乙氧基硅烷加入到捏合机中搅拌均匀；
B组分：将质量份为12份的甲基三甲氧基硅烷、30份的201甲基硅油、0.2份的二丁基二醋酸锡加入行星搅拌机，在-0.08MPa负压下搅拌均匀；
在室温下，将A、B两组份按重量比11:1混合后即得本发明的硅酮密封胶。
实施例3
步骤1)改性白石墨烯的制备：将5-10层的白石墨烯用0.1％的长链硼烷水溶液浸泡24h，50℃真空干燥48h，得到改性白石墨烯。
步骤2)A组分：将质量份数为100份的二羟基聚甲基苯基硅氧烷、步骤1)中得到的2份的改性白石墨烯、5份石英粉、60的份轻质碳酸钙、9份的γ―(2,3-环氧丙氧)丙基三甲氧基硅烷加入到捏合机中搅拌均匀；
B组分：将质量份数为10份的甲基三(二烷基二肟)硅烷、25份的201甲基硅油、0.1份的二丁基二月桂酸锡加入行星搅拌机在-0.09MPa负压下搅拌均匀；
在室温下，将A、B两组份按重量比12:1混合后即得本发明的硅酮密封胶。
实施例4
步骤1)改性白石墨烯的制备：将5-10层的白石墨烯用0.1％的油胺水溶液浸泡24h，50℃真空干燥48h，得到改性白石墨烯。
步骤2)A组分：将质量份数为100份的二羟基聚甲基苯基硅氧烷、步骤1)中得到的5份的改性白石墨烯、5份石英粉、80的份轻质碳酸钙、10份的γ―(2,3-环氧丙氧)丙基三甲氧基硅烷加入在捏合机中搅拌均匀；
B组分：将质量份数为13份的甲基三(二烷基二肟)硅烷、30份的201甲基硅油、0.2份的二丁基二月桂酸锡加入行星搅拌机在-0.09MPa负压下搅拌均匀；
在室温下，将A、B两组份按重量比12:1混合后即得本发明的硅酮密封胶。
实施例5
A组分：将质量份为100份的烷氧基封端聚二甲基硅氧烷、2份的氧化石墨烯、70份的纳米活性碳酸钙、9份的N-(β-氨乙基)-γ-氨丙基三甲氧基硅烷加入在捏合机中搅拌均匀；
B组分：将质量份数为10份的乙烯基三甲氧基硅烷、25份的201甲基硅油、0.2份的二丁基氧化锡加入行星搅拌机在-0.09MPa负压下搅拌均匀；
在室温下，将A、B两组分按重量比12:1混合后即得本发明的硅酮密封胶。
实施例6
A组分：将质量为100份的烷氧基封端聚二甲基硅氧烷、5份的氧化石墨烯、85份的纳米活性碳酸钙、10份的N-(β-氨乙基)-γ-氨丙基三甲氧基硅烷加入捏合机中搅拌均匀；
B组分：将质量份数为14份的乙烯基三甲氧基硅烷、30份的201甲基硅油、0.2份的二丁基氧化锡加入行星搅拌机，在-0.09MPa负压下搅拌均匀；
在室温下，将A、B两组份按重量比12:1混合后即得本发明的硅酮密封胶。
对比实施例1
A组分：将质量为100份的二羟基聚二甲基硅氧烷、80份的纳米活性碳酸钙、、10份的N-(β-氨乙基)-γ-氨丙基三甲氧基硅烷加入捏合机中搅拌均匀；
B组分：将质量份数为10份的乙烯基三甲氧基硅烷、30份的201甲基硅油、0.2份的二丁基氧化锡加入行星搅拌机，在-0.09MPa负压下搅拌均匀；
在室温下，将A、B两组份按重量比12:1混合后即得本发明的硅酮密封胶。
表1中为测定实施例1-6中所制备得到的本发明高阻气性能的复合硅酮密封胶参数：
表1实施例1-6复合硅酮密封胶数据
Figure PCTCN2017098068-appb-000001
从上表1可知，本发明的制备方法可以大幅度提高硅酮密封胶的阻隔性能和机械强度。
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对本发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。

Claims (8)

  1. 一种高阻气性能的复合硅酮密封胶，其特征在于，包括A组分和B组分；
    所述A组份包括质量份数为：100份基础胶、0.01-10份纳米材料粉体、40-100份填料、5-10份硅烷偶联剂；
    所述B组份包括质量份数为：10-20份交联剂、10-30份增塑剂、0.1-2份催化剂；
    所述A组份与B组份重量比为10～13:1；
    所述的基础胶包括羟基封端聚二甲基硅氧烷、羟基封端聚甲基苯基硅氧烷、烷氧基封端聚二甲基硅氧烷、乙烯基封端聚二甲基硅氧烷、烯丙基硅基封端聚二甲基硅氧烷中的一种；
    所述纳米材料粉体包括5-10层的氧化石墨烯、改性石墨烯或改性白石墨烯中的一种。
  2. 根据权利要求1所述的复合硅酮密封胶，其特征在于，所述基础胶选自粘度为50000～80000cP的羟基封端聚二甲基硅氧烷。
  3. 根据权利要求1所述的复合硅酮密封胶，其特征在于，所述改性石墨烯或改性白石墨烯，是由石墨烯或者白石墨烯，在质量浓度为0.1％的表面活性剂水溶液浸泡24h，50℃真空干燥48h制备获得。
  4. 根据权利要求3所述的复合硅酮密封胶，其特征在于，对所述石墨烯进行改性使用的表面活性剂包括十二烷基磺酸钠、十二烷基苯磺酸钠、聚乙烯醇、木质素磺酸钠、十六烷基三甲基溴化铵、聚乙烯吡咯烷酮等中的一种；对白石墨烯进行改性使用的表面活性剂为长链路易斯碱、长链路易斯酸、季铵化物、磺酸化物、非离子型表面活性剂中的一种。
  5. 根据权利要求4所述的复合硅酮密封胶，其特征在于，所述长链路易斯 碱为油胺；所述长链路易斯酸为长链硼烷所述长链路易斯碱为胺类；所述长链路易斯酸为硼烷类；所述季铵化物为烷基三甲基季铵盐、烷基二甲基苄基季铵盐、二烷基二甲基季铵盐中的一种；所述磺酸化物为十二烷基苯磺酸钠、十二烷基磺酸钠、木质素磺酸钠、甘胆酸钠中的一种；所述非离子型表面活性剂为聚醚、聚酯、聚乙烯醇、纤维素衍生物中的一种。
  6. 根据权利要求1所述的复合硅酮密封胶，其特征在于，所述填料选自气相白炭黑、石英粉、滑石粉、重质碳酸钙、轻质碳酸钙、纳米活性碳酸钙、蒙脱石、硅藻土中的至少一种；
    所述硅烷偶联剂选自γ―氨丙基三乙氧基硅烷、γ―(2,3-环氧丙氧)丙基三甲氧基硅烷、γ―甲基丙烯酰氧基丙基三甲氧基硅烷、N-(β-氨乙基)-γ-氨丙基三甲氧基硅烷中的至少一种。
  7. 根据权利要求1所述的复合硅酮密封胶，其特征在于，所述交联剂选自甲基三甲氧基硅烷、甲基三(二烷基二肟)硅烷、乙烯基三甲氧基硅烷中的一种；
    所述的增塑剂选自粘度为100～500cP的201甲基硅油；
    所述的催化剂选自二丁基二醋酸锡、二丁基二月桂酸锡、二丁基氧化锡中的一种。
  8. 权利要求1-7所述任意一项所述的复合硅酮密封胶的制备方法，其特征在于，包括：
    步骤1)选用纳米材料粉体为：5-10层的氧化石墨烯、经表面活性剂处理得到的改性石墨烯或改性白石墨烯中的一种；
    步骤2)A组分的制备：将基础胶、纳米材料粉体、填料、硅烷偶联剂在捏合机或行星搅拌机内搅拌均匀；
    B组分的制备：将交联剂、增塑剂、催化剂加入行星搅拌机在压力为 -0.06～-0.099MPa的负压下搅拌均匀；
    在室温下，将A、B两组分按规定比例混合后即得本发明的硅酮密封胶。
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