CN110305319B - 微孔聚合物的制备方法 - Google Patents
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Abstract
本发明提供了一种微孔聚合物的制备方法,包括以下步骤:S1,按比例称取多氨基芳香烃以及多卤代芳香烃溶解于有机溶剂中形成反应溶液;S2,在所述反应溶液加入一价铜的氧化物或盐作为催化剂以及活性剂,并加入碱并超声处理;S3,在反应体系中通入氮气脱气回填,然后加热到75~85℃并恒温1~5h,再缓慢加热到110~150℃反应100~150h;S4,将步骤S3得到的产物用有机溶剂清洗,得到棕色粉末状沉淀。
Description
技术领域
本发明涉及一种微孔聚合物的制备方法。
背景技术
POPs(Porous Organic Polymers)是一种拥有较高的比表面积和大量永久孔结构且完全由C、H、N、O等有机原子通过共价键连接而成的新型材料,由于合成方法多样、结构的可修饰、功能的可调节、良好的物理化学稳定性等特点引起了极大的关注,在工业污水的处理、CO2捕获、氢气的存储、有毒有机小分子的吸附等方面表现出优秀的性能,成为继金属有机框架(MOFs)、共价有机框架(COFs)、沸石(zeolites)和活性炭之后,又一得到快速发展的多孔材料。POPs根据其化学结构的不同,主要包括共价有机多孔聚合物(COFs)、氢键有机框架(HOFs)、共轭微孔聚合物 (CMPs)、自微孔聚合物(PIMs)等。我们发现POPs的热稳定性比不了沸石,合成的多样性比不了MOFs,POPs之所以引起巨大的关注是因为,可以通过多种多样的基础有机合成方法将这些特点结合在一起,赋予多孔聚合物的独特特性。因此,有机合成的发展进一步推动着POPs的进步。高分子化合物的发展与有机化学发展息息相关,基础有机化学蓬勃发展有力地推动高分子化学的进步,多孔有机聚合物(POPs)也不例外。目前构建POPs聚合物大致有三种:C-C的构建和C-N的构建;其中C-C键构建是化学变化中重要的过程之一,它可以将简单小分子转变为结构复杂、功能多样的大分子,大量过渡金属催化碳-碳耦合反应的有机化学方法被报道。有100多种人名反应被开发,还有越来越多的C-C键形成反应在不断被发现。而合成POPs的方法主要有Sonogashira-Hagihara交叉耦合反应、Yamamoto自身偶联反应、Suzuki偶联反应、芳香烃的三聚反应、傅克烷基化反应等。
然而,这些反应往往受到昂贵、有毒催化剂(如含有Pd或Ni的催化剂) 的影响,实现POPs的低成本、绿色合成成为一个巨大的挑战。
发明内容
本发明提供了一种微孔聚合物的制备方法,可以有效解决上述问题。
本发明是这样实现的:
一种微孔聚合物的制备方法,包括以下步骤:
S1,按比例称取多氨基芳香烃以及多卤代芳香烃溶解于有机溶剂中形成反应溶液;
S2,在所述反应溶液加入一价铜的氧化物或盐作为催化剂以及活性剂,并加入碱并超声处理;
S3,在反应体系中通入氮气脱气回填,然后加热到75~85℃并恒温1~5h,再缓慢加热到110~150℃反应100~150h;
S4,将步骤S3得到的产物用有机溶剂清洗,得到棕色粉末状沉淀。
本发明的有益效果是:本发明采用廉价、无毒的一价铜为催化剂合成的微孔聚合物不溶于任何有机溶剂,具有良好的化学以及物理稳定性,热稳定性可达到300℃;通过吸附仪测试聚合物的比表面积和孔径,研究发现,通过一价铜合成的微孔聚合物具有较高的比表面积,可达280m2.g-1,孔径分布在0.6nm和0.9nm,表现为微孔聚合物。通过静态吸附实验表面合成的聚合物对乙烯、乙炔等有机小分子具有良好的吸附性能。另外,本发明的方法还有简单易行,易于工业化生产等特点。
附图说明
为了更清楚地说明本发明实施方式的技术方案,下面将对实施方式中所需要使用的附图作简单地介绍,应当理解,以下附图仅示出了本发明的某些实施例,因此不应被看作是对范围的限定,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他相关的附图。
图1-3是本发明实施例提供微孔聚合物的测试数据图。
具体实施方式
为使本发明实施方式的目的、技术方案和优点更加清楚,下面将结合本发明实施方式中的附图,对本发明实施方式中的技术方案进行清楚、完整地描述,显然,所描述的实施方式是本发明一部分实施方式,而不是全部的实施方式。基于本发明中的实施方式,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施方式,都属于本发明保护的范围。因此,以下对在附图中提供的本发明的实施方式的详细描述并非旨在限制要求保护的本发明的范围,而是仅仅表示本发明的选定实施方式。基于本发明中的实施方式,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施方式,都属于本发明保护的范围。
在本发明的描述中,术语“第一”、“第二”仅用于描述目的,而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此,限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本发明的描述中,“多个”的含义是两个或两个以上,除非另有明确具体的限定。
本发明实施例一种微孔聚合物的制备方法,包括以下步骤:
S1,按比例称取多氨基芳香烃以及多卤代芳香烃溶解于有机溶剂中形成反应溶液;
S2,在所述反应溶液加入一价铜的氧化物或盐作为催化剂以及活性剂,并加入碱并超声处理;
S3,在反应体系中通入氮气脱气回填,然后加热到75~85℃并恒温1~5h,再缓慢加热到110~150℃反应100~150h;
S4,将步骤S3得到的产物用有机溶剂清洗,得到棕色粉末状沉淀。
在步骤S1中,所述机溶剂选自DMF、丙三醇、甲苯、乙醇、二氧六环及其混合物。所述多氨基芳香烃以及所述多卤代芳香烃按照摩尔比2~5: 2混合溶解于有机溶剂。
在步骤S2中,所述一价铜的氧化物或盐选自原料摩尔比例5%-10%氧化亚铜、氯化亚铜、溴化亚铜、碘化亚铜及其混合物。优选的,加入所述催化剂2倍当量的活性剂,所述活性剂选自水杨醛肟、反式-1,2-己二胺、 DPPF及其混合物。所述碱选自原料摩尔比例10%-20%碳酸氢钾、碳酸氢钠、氢氧化钾、磷酸钾及其混合物。
另外,作为进一步改进的,所述将步骤S3得到的产物用有机溶剂清洗,得到棕色粉末状沉淀的步骤包括:
S31,先用三氯甲烷洗涤反应混合物,将三氯甲烷倾出,再用甲醇洗涤至洗涤液无色,过滤得到棕色粉末状沉淀。
通过本发明方法制备获得的微孔聚合物,具有良好的化学以及物理稳定性,其热稳定性可达到300℃;通过吸附仪测试聚合物的比表面积和孔径,研究发现,通过一价铜合成的微孔聚合物具有较高的比表面积,可达 280m2.g-1,孔径分布在0.6nm和0.9nm,表现为微孔聚合物。通过静态吸附实验表面合成的聚合物对乙烯、乙炔等有机小分子具有良好的吸附性能。
实施例1:
将1,4-苯二胺以及三(4-碘基苯基)胺按照摩尔比3:2加入到丙三醇中形成反应溶液;在所述反应溶液加入原料摩尔比例8%的氧化亚铜的作为催化剂以及原料摩尔比例16%的水杨醛肟作为活性剂,并加入原料摩尔比例 12%磷酸钾并超声处理30分钟;在反应体系中通入氮气脱气回填3次后,然后加热到80℃并恒温2h,再缓慢加热到110℃反应124h;停止反应后,冷却到室温先用三氯甲烷洗涤反应混合物一次,将三氯甲烷倾出,再用甲醇洗涤至洗涤液无色,过滤得到棕色粉末状沉淀POP- 7。
实施例2:
将1,4-苯二胺以及三(4-碘基苯基)胺按照摩尔比3:2加入到DMF中形成反应溶液;在所述反应溶液加入原料摩尔比例8%的溴化亚铜的作为催化剂以及原料摩尔比例16%的DPPF作为活性剂,并加入原料摩尔比例12%磷酸钾并超声处理30分钟;在反应体系中通入氮气脱气回填3次后,然后加热到80℃并恒温2h,再缓慢加热到110℃反应124h;停止反应后,冷却到室温先用三氯甲烷洗涤反应混合物一次,将三氯甲烷倾出,再用甲醇洗涤至洗涤液无色,过滤得到棕色粉末状沉淀POP- 8。
实施例3:
将1,4-苯二胺以及三(4-碘基苯基)胺按照摩尔比3:2加入到甲苯中形成反应溶液;在所述反应溶液加入原料摩尔比例8%的碘化亚铜的作为催化剂以及原料摩尔比例16%的反式-1,2-己二胺作为活性剂,并加入原料摩尔比例12%磷酸钾并超声处理30分钟;在反应体系中通入氮气脱气回填3次后,然后加热到80℃并恒温2h,再缓慢加热到110℃反应124h;停止反应后,冷却到室温先用三氯甲烷洗涤反应混合物一次,将三氯甲烷倾出,再用甲醇洗涤至洗涤液无色,过滤得到棕色粉末状沉淀POP- 9。
分析测试:
将棕色粉末状沉淀POP - 7-9分别进行进行吸附测试。请参照图1-2,从图 1-2中可以看出:
图1为在196K温度下、1个大气压条件下POP-7,POP-8,POP-9对 CO2进行吸附的等温线。从图中可以看出,其对CO2具有良好的吸附效果。
图2为在196K温度下、1个大气压条件下POP-7对六种气体的静态吸附曲线。从图2中可以看出,该聚合物对乙炔、乙烯、二氧化碳具有高的吸附能力,分别达到27.0cm3/g,19.1cm3/g,15.5cm3/g;而对甲烷、氮气的吸附量很低,分别为:3.6cm3/g和0.6cm3/g;充分说明该类聚合物具有在C2H2/CH4以及CO2/N2的潜在的分离能力。这是由于该类聚合物是含有丰富氮功能位点的微孔聚合物,C2H2和CO2与框架强的相互作用,可能由于H-C≡C-H···N氢键以及π-π的相互作用,也可能与孔道内催化剂协同作用的结果。
图3为通过非定域密度函数理论获得的POP-7,POP-8,POP-9三种聚合物的孔径分布图。
从吸附等温线显示,三种多孔聚合物呈现出TypeⅠb型的吸附等温线,在P/P0<0.1时,对CO2气体表现出非常强的吸附能力,说明三种多孔聚合物是微孔材料(孔径分布小于0.2nm),这个结果刚好与图3的孔径分布图相符合。从图3,可以看出,三种聚合物的孔径分布相似,分别在0.55nm 和0.86nm,是一种微孔聚合物。通过计算得到POP-7,POP-8,POP-9三种聚合物的比表面积分别为:204.1cm2/g,165.5cm2/g,194.6cm2/g,说明得到的三种具有较高的比表面的微孔聚合物。虽然均是采用一价铜作为催化剂,由于采用的催化剂的存在形式、碱、有机溶剂不同,造成整个体系的反应活性不同,因而通过调控体系的各个因素进一步调控目标产物的性质,从而实现多孔聚合物在各个领域的应用。
以上所述仅为本发明的优选实施方式而已,并不用于限制本发明,对于本领域的技术人员来说,本发明可以有各种更改和变化。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (5)
1.一种微孔聚合物的制备方法,其特征在于,包括以下步骤:
S1,按摩尔比3:2称取1,4-苯二胺以及三(4-碘基苯基)胺溶解于有机溶剂中形成反应溶液;
S2,在所述反应溶液加入一价铜的氧化物, 或一价铜的盐作为催化剂,以及加入活性剂,并加入碱并超声处理,所述活性剂选自水杨醛肟、反式-1,2-己二胺及其混合物;
S3,在反应体系中通入氮气脱气回填,然后加热到75~85℃并恒温1~5h,再缓慢加热到110~150℃反应100~150 h;
S4,将步骤S3得到的产物用有机溶剂清洗,得到棕色粉末状沉淀。
2.如权利要求1所述的一种微孔聚合物的制备方法,其特征在于,在步骤S1中,所述有机溶剂选自DMF、丙三醇、甲苯、乙醇、二氧六环及其混合物。
3.如权利要求1所述的一种微孔聚合物的制备方法,其特征在于,在步骤S2中,所述一价铜的氧化物为氧化亚铜;所述一价铜的盐选自氯化亚铜、溴化亚铜、碘化亚铜及其混合物。
4.如权利要求1所述的一种微孔聚合物的制备方法,其特征在于,在步骤S2中,所述碱选自碳酸氢钾、碳酸氢钠、氢氧化钾及其混合物。
5.如权利要求1所述的一种微孔聚合物的制备方法,其特征在于,所述将步骤S3得到的产物用有机溶剂清洗,得到棕色粉末状沉淀的步骤包括:
S31,先用三氯甲烷洗涤反应混合物,将三氯甲烷倾出,再用甲醇洗涤至洗涤液无色,过滤得到棕色粉末状沉淀。
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