CN106957464A - 一种碳纳米管均匀分散于天然胶乳中的制备方法 - Google Patents
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Abstract
本发明公开了一种碳纳米管均匀分散于天然胶乳中的制备方法,属于高分子材料制备领域。其配方的原材料按照重量比为:胶乳161.3份(固含量62%)、碳纳米管3份、炭黑40份、氧化锌5份、硬脂酸2份、防老剂4020 1份、促进剂NS 1份、硫磺3份、十二烷基硫酸钠4份。工艺步骤为:将天然胶乳与十二烷基硫酸钠搅拌混合均匀,后加入各类橡胶助剂,再将碳纳米管分成10等份依次加入混合物中,直至呈现均匀的淤浆状态混合物。后将混合物浇注于模具中干燥脱水,开炼加入炭黑补强剂和硫磺。硫化制得混合均匀的碳纳米管/天然胶复合材料。
Description
所属技术领域
本发明涉及混炼胶制备方法领域,特别是一种碳纳米管均匀分散于天然胶乳中的制备方法。属于高分子材料制备领域。
背景技术
碳纳米管又名巴基管,是日本NEC公司基础研究实验室的电子显微镜专家IijimaS用高分辨透射电子显微镜检验石墨电弧设备中产生的球状碳分子时意外发现的。作为一维新兴纳米材料,具有重量轻、力学、电学和化学性能等优异特点,使其广泛应用于航空航天、超级电容器和复合材料等领域。单根碳纳米管热导率的实验测量值为2000W/(m·k),平均拉伸强度为1.95GPa左右。然而在实际的混炼加工过程中,碳纳米管本身极易团聚,很难发挥单根碳纳米管自身的优异性能,也使得碳纳米管在橡胶复合材料中的混合分散效果不佳,继而影响复合材料的各项性能。
碳纳米管高的长径比在传统的机械混炼强大剪切作用下容易发生断裂,且其较轻的密度也使得在干法混炼过程中出现吃料困难,粉料易飞扬从而造成环境污染和物料浪费的现象。乳液共混法是保持物料在胶乳的状态下混合,研究发现乳液中的碳纳米管由于自身亲水性差,尤其在后期破乳时出现分散不均现象,要实现碳纳米管在水相中的纳米分散也是目前需要解决的问题。
发明内容
为了解决碳纳米管在橡胶乳液中的的分散性,更好的发挥其自身优异性能。本发明提供一种使碳纳米管能够均匀分散于天然胶乳中的制备方法。
为了实现上述目的,本发明解决其技术问题所采用的技术方案是:
一种碳纳米管均匀分散于天然胶乳中的制备工艺:其配方为:胶乳161.3份(固含量62%)、碳纳米管3份、炭黑40份、氧化锌5份、硬脂酸2份、防老剂4020 1份、促进剂NS 1份、硫磺3份、十二烷基硫酸钠4份。
其制备工艺包括以下步骤:
(1)用研钵将防老剂4020、硬脂酸、促进剂NS、十二烷基硫酸钠等颗粒状小料研磨彻底成粉状。在搅拌状态下往天然胶乳中加入SDS,然后将粉状防老剂4020、硬脂酸、促进剂NS加入天然胶乳,继续搅拌10min。
(2)将碳纳米管按照10等份,依次加入天然胶乳中并不断搅拌。等第一份CNTs完全混入胶乳后再加第二份CNTs,重复上述工作直至10份碳纳米管都混入胶乳。
(3)此时混入小料和CNTs的胶乳呈现出了淤浆状,将这些淤浆状混合物从烧杯中取出平铺于表面皿上,将表面皿放置于50℃的烘箱中干燥24h。
(4)烘干后的胶料在开炼机开炼时依次加入炭黑、硫磺。混炼胶停放12小时后在150℃下硫化10min。
本发明的有益效果是,在碳纳米管与胶乳共混的过程中,无分散不均现象出现,均匀的分散性有助于提高复合材料整体性能,无分散不均引起的复合材料性能缺陷。
附图说明
附图1是本发明的工艺流程图。
附图2是根据本发明实施例所述的导热稳定性测试图(1#为通过机械混炼法得到的硫化胶试样,2#为通过乳液共混法得到的硫化胶试样,3#为通过本发明方法得到的硫化胶试样)。
附表3是根据本发明实施例所述的拉伸强度示意表。
具体实施方式
下面结合附图对本发明进一步说明具体的实施方法:
如附图1所示,本发明为了使碳纳米管在天然胶乳中分散均匀,调整加料顺序,首先将十二烷基硫酸钠与天然胶乳搅拌混合,后加入研细的其它助剂,再将碳纳米管按照等量份依次加入。获得淤浆状态混合物干燥后在开炼机上加炭黑和硫磺。
其制备工艺包括以下步骤:
(1)用研钵将防老剂4020、硬脂酸、促进剂NS、十二烷基硫酸钠等颗粒状小料研磨彻底成粉状。在搅拌状态下往天然胶乳中加入SDS,然后将粉状防老剂4020、硬脂酸、促进剂NS加入天然胶乳,继续搅拌10min。
(2)将碳纳米管按照10等份,依次加入天然胶乳中并不断搅拌。等第一份CNTs完全混入胶乳后再加第二份CNTs,重复上述工作直至10份碳纳米管都混入胶乳。
(3)此时混入小料和CNTs的胶乳呈现出了淤浆状,将这些淤浆状混合物从烧杯中取出平铺于表面皿上,将表面皿放置于50℃的烘箱中干燥24h。
(4)烘干后的胶料在开炼机开炼时依次加入炭黑、硫磺。混炼胶停放12小时后在150℃下硫化10min。
使用上述方法制备的碳纳米管能够均匀分散于天然胶乳中,得到的复合材料其导热性能参照附图2,本发明方法的试样测试数据稳定性增强。参照附表3,本发明方法的试样拉伸强度测试数据稳定性强且数值也较高。
表3拉伸强度稳定性测试数据
Claims (3)
1.一种碳纳米管均匀分散于天然胶乳中的制备方法,其特征在于:其配方的的原材料按照重量比为:胶乳161.3份(固含量62%)、碳纳米管3份、炭黑40份、氧化锌5份、硬脂酸2份、防老剂4020 1份、促进剂NS 1份、硫磺3份、十二烷基硫酸钠4份。
其制备工艺包括以下步骤:
(1)用研钵将防老剂4020、硬脂酸、促进剂NS、十二烷基硫酸钠等颗粒状小料研磨彻底成粉状。在搅拌状态下往天然胶乳中加入SDS,然后将粉状防老剂4020、硬脂酸、促进剂NS加入天然胶乳,继续搅拌10min。
(2)将碳纳米管按照10等份,依次加入天然胶乳中并不断搅拌。等第一份CNTs完全混入胶乳后再加第二份CNTs,重复上述工作直至10份碳纳米管都混入胶乳。
(3)此时混入小料和CNTs的胶乳呈现出了淤浆状,将这些淤浆状混合物从烧杯中取出平铺于表面皿上,将表面皿放置于50℃的烘箱中干燥24h。
(4)烘干后的胶料在开炼机开炼时依次加入炭黑、硫磺。混炼胶停放12小时后在150℃下硫化10min。
2.按权利要求1所述的一种碳纳米管均匀分散于天然胶乳中的制备方法,其特征在于:在搅拌状态下预先往胶乳中加入十二烷基硫酸钠。
3.按权利要求1所述的一种碳纳米管均匀分散于天然胶乳中的制备方法,其特征在于:碳纳米管按照10等份依次加入,直至呈现淤浆状混合物。
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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CN108192159A (zh) * | 2018-02-22 | 2018-06-22 | 青岛科技大学 | 一种碳纳米管增强杜仲胶形状记忆材料的制备方法及应用 |
CN110218365A (zh) * | 2019-07-11 | 2019-09-10 | 陕西延长石油(集团)有限责任公司研究院 | 一种天然橡胶碳纳米管复合材料及其制备方法 |
CN110655693A (zh) * | 2019-10-24 | 2020-01-07 | 苏州第一元素纳米技术有限公司 | 橡胶复合材料及其制备方法 |
CN112961413A (zh) * | 2021-03-11 | 2021-06-15 | 江西耐普矿机股份有限公司 | 一种橡胶软管用衬胶、其制备方法及矿山机械橡胶软管 |
CN114075352A (zh) * | 2020-08-12 | 2022-02-22 | 苏州怒鲨智能科技有限公司 | 一种柔性传感器用导电橡胶及其制备方法 |
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2017
- 2017-03-22 CN CN201710173815.3A patent/CN106957464A/zh active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108192159A (zh) * | 2018-02-22 | 2018-06-22 | 青岛科技大学 | 一种碳纳米管增强杜仲胶形状记忆材料的制备方法及应用 |
CN110218365A (zh) * | 2019-07-11 | 2019-09-10 | 陕西延长石油(集团)有限责任公司研究院 | 一种天然橡胶碳纳米管复合材料及其制备方法 |
CN110655693A (zh) * | 2019-10-24 | 2020-01-07 | 苏州第一元素纳米技术有限公司 | 橡胶复合材料及其制备方法 |
CN114075352A (zh) * | 2020-08-12 | 2022-02-22 | 苏州怒鲨智能科技有限公司 | 一种柔性传感器用导电橡胶及其制备方法 |
CN112961413A (zh) * | 2021-03-11 | 2021-06-15 | 江西耐普矿机股份有限公司 | 一种橡胶软管用衬胶、其制备方法及矿山机械橡胶软管 |
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