CN111040239B - 一种耐高温的聚酰亚胺基多孔微球及其制备方法 - Google Patents

一种耐高温的聚酰亚胺基多孔微球及其制备方法 Download PDF

Info

Publication number
CN111040239B
CN111040239B CN201911377946.9A CN201911377946A CN111040239B CN 111040239 B CN111040239 B CN 111040239B CN 201911377946 A CN201911377946 A CN 201911377946A CN 111040239 B CN111040239 B CN 111040239B
Authority
CN
China
Prior art keywords
temperature
preparation
solution
polyimide
microsphere
Prior art date
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.)
Active
Application number
CN201911377946.9A
Other languages
English (en)
Other versions
CN111040239A (zh
Inventor
陆赵情
王亚芳
谢璠
贾峰峰
金崭凡
马秦
杨凯伦
高坤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shaanxi University of Science and Technology
Original Assignee
Shaanxi University of Science and Technology
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shaanxi University of Science and Technology filed Critical Shaanxi University of Science and Technology
Priority to CN201911377946.9A priority Critical patent/CN111040239B/zh
Publication of CN111040239A publication Critical patent/CN111040239A/zh
Application granted granted Critical
Publication of CN111040239B publication Critical patent/CN111040239B/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/28Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by elimination of a liquid phase from a macromolecular composition or article, e.g. drying of coagulum
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G73/00Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
    • C08G73/06Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
    • C08G73/10Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
    • C08G73/1003Preparatory processes
    • C08G73/1007Preparatory processes from tetracarboxylic acids or derivatives and diamines
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G73/00Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
    • C08G73/06Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
    • C08G73/10Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
    • C08G73/1046Polyimides containing oxygen in the form of ether bonds in the main chain
    • C08G73/105Polyimides containing oxygen in the form of ether bonds in the main chain with oxygen only in the diamino moiety
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G73/00Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
    • C08G73/06Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
    • C08G73/10Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
    • C08G73/1067Wholly aromatic polyimides, i.e. having both tetracarboxylic and diamino moieties aromatically bound
    • C08G73/1071Wholly aromatic polyimides containing oxygen in the form of ether bonds in the main chain
    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01DMECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00Formation of filaments, threads, or the like
    • D01D5/0007Electro-spinning
    • D01D5/0015Electro-spinning characterised by the initial state of the material
    • D01D5/003Electro-spinning characterised by the initial state of the material the material being a polymer solution or dispersion
    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01DMECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00Formation of filaments, threads, or the like
    • D01D5/0007Electro-spinning
    • D01D5/0061Electro-spinning characterised by the electro-spinning apparatus
    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01FCHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/58Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
    • D01F6/74Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polycondensates of cyclic compounds, e.g. polyimides, polybenzimidazoles
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2201/00Foams characterised by the foaming process
    • C08J2201/04Foams characterised by the foaming process characterised by the elimination of a liquid or solid component, e.g. precipitation, leaching out, evaporation
    • C08J2201/048Elimination of a frozen liquid phase
    • C08J2201/0482Elimination of a frozen liquid phase the liquid phase being organic
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2201/00Foams characterised by the foaming process
    • C08J2201/04Foams characterised by the foaming process characterised by the elimination of a liquid or solid component, e.g. precipitation, leaching out, evaporation
    • C08J2201/048Elimination of a frozen liquid phase
    • C08J2201/0484Elimination of a frozen liquid phase the liquid phase being aqueous
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2379/00Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen, or carbon only, not provided for in groups C08J2361/00 - C08J2377/00
    • C08J2379/04Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
    • C08J2379/08Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

本发明公开了一种耐高温的聚酰亚胺基多孔微球的制备方法及其制备方法,方法包括:首先选用二胺和二酐进行缩聚反应,溶剂置换冷冻干燥后得到聚酰胺酸粉末;然后聚酰胺酸粉末加入丙酮与DMF的混合溶剂中,前驱体溶液再将前驱体溶液进行静电纺丝,接受液为极性溶剂,得到前驱体微球颗粒;最后前驱体微球颗粒进行高温热酰亚胺化,最终得到多孔的聚酰亚胺微球。本发明解决了制备纳米微球溶剂耗费量大,形貌难以控制易塌陷等的问题。经本发明方法制备得到的聚酰亚胺基多孔微球,形貌稳定,孔隙率高,在载药运输,水体过滤、催化等方面具有潜在应用。

Description

一种耐高温的聚酰亚胺基多孔微球及其制备方法
技术领域
本发明涉及高分子微球制备技术领域,特别涉及一种耐高温的聚酰亚胺基多孔微球及其制备方法。
背景技术
高分子微球是指直径在微米级甚至几百微米,形状为球形或其他几何形体的高分子材料或高分子复合材料。多孔微球具有吸附,扩散和透气保湿等特性,因此在离子交换、作为载体等方面具有广泛的应用。
聚酰亚胺是一类分子主链上含有芳香环的高分子材料,其具有突出的耐热性能和优异的机械性能,是迄今为止在工业的实际应用中耐热等级最高的高分子材料之一。聚酰亚胺微球既能表现出聚酰亚胺的特性,又带有微球比表面积大等特点,因此具有广阔的发展前景,例如,应用于微电子领域以及催化、封装、可控释放和填料等。因此,聚酰亚胺微球的研究得到了大家的广泛关注。
聚酰亚胺多孔微球具有耐高温,耐溶剂性等优异性能。虽然聚酰亚胺微球具有广阔的发展前景,但目前的实验室研究所制备的聚酰亚胺还存在各种不用的缺点和问题,比如溶剂耗费量大,形貌难以控制易塌陷等,所以还需要做进一步研究和努力。因此,研究发展并改进微球的工艺方法,使之成本低廉适用于工业化生产是目前要解决的重要问题。
发明内容
为了解决现有技术中聚酰亚胺多孔微球形貌难以控制的问题,本发明提供了一种耐高温的聚酰亚胺基多孔微球及其制备方法。
为达到上述目的,本发明采用以下技术方案:
一种耐高温的聚酰亚胺基多孔微球的制备方法,包括如下步骤:
首先选用二胺和二酐进行缩聚反应,溶剂置换冷冻干燥后得到聚酰胺酸粉末;
然后聚酰胺酸粉末加入丙酮与DMF的混合溶剂中,前驱体溶液;
再将前驱体溶液进行静电纺丝,接受液为极性溶剂,得到前驱体微球颗粒;
最后前驱体微球颗粒进行高温热酰亚胺化,最终得到多孔的聚酰亚胺微球。
作为本发明的进一步改进,所述聚酰胺酸粉末的制备方法具体为:
将4,4’-二氨基二苯醚与均苯四甲酸二酐加入N,N’-二甲基甲酰胺中,在0~8℃下低温缩聚合成聚酰胺酸,得到黄色均匀粘稠状液体后,静置消泡,然后经去离子水溶剂置换后,冷冻干燥,得到的黄色固体即为PAA,研磨成聚酰胺酸粉末。
作为本发明的进一步改进,所述4,4’-二氨基二苯醚与均苯四甲酸二酐按照摩尔比为(0.85~1.05):(1.05~1.25)。
作为本发明的进一步改进,所述聚酰胺酸质量浓度为12~20wt%。
作为本发明的进一步改进,所述前驱体溶液的制备方法具体为:
将丙酮与N,N’-二甲基甲酰胺混合,加入PAA粉末,超声分散5~10min后,磁力搅拌12~24h,至粉末分散均匀。
作为本发明的进一步改进,丙酮与N,N’-二甲基甲酰胺按照体积比为(3-7):(2-6)的比例混合。
作为本发明的进一步改进,静电纺丝具体工艺为:
将前驱体溶液添加到静电纺丝的针管中,加压12~26kV,纺丝液流速0.3~4mL/h,针头距接收板距离为8~20cm,接受液为去离子水或乙醇溶液;经砂芯漏斗过滤后得到黄色颗粒,60℃真空干燥12~24h,真空脱气24h。
作为本发明的进一步改进,静电纺丝中的接受液为乙醇或去离子水等极性溶剂。
作为本发明的进一步改进,高温热酰亚胺化的具体工艺为:
将得到的颗粒在高温管式炉中,N2环境下,进行阶段升温反应后处理:
①25~150℃,5~15℃/min,退火30~60min
②~250℃,10~20℃/min,退火30~60min
③~300℃,10~30℃/min,退火60~90min。
一种耐高温的聚酰亚胺基多孔微球的制备方法,由所述的制备方法制得。
本发明相比于现有技术,具有以下优点:
本发明提供了一种耐高温的聚酰亚胺基多孔微球的制备方法,首先选用二胺和二酐进行低温缩聚反应,溶剂置换冷冻干燥后得到聚酰胺酸粉末;然后混合丙酮与N,N’-二甲基甲酰胺,而后将PAA粉末溶解于混合溶剂中,进行静电纺丝,接受液为乙醇或去离子水等极性溶剂,最后进行高温热酰亚胺化,最终得到多孔的聚酰亚胺微球。解决了制备纳米微球溶剂耗费量大,形貌难以控制易塌陷等的问题。经本发明方法制备得到的聚酰亚胺基多孔微球,形貌稳定,孔隙率高,在载药运输,水体过滤、催化等方面具有潜在应用。
附图说明
图1多孔微球的实物图;
图2多孔微球的SEM图;其中(a)和(b)为不同倍数的图。
图3为多孔微球的吸附曲线;
图4为多孔微球孔径分布的BJH模型。
具体实施方式
本发明提供了一种耐高温的聚酰亚胺基多孔微球的制备方法,包括以下步骤:
1)聚酰胺酸粉末的制备:取原料4,4’-二氨基二苯醚(ODA),均苯四甲酸二酐(PMDA),N,N’-二甲基甲酰胺(DMF);
将ODA与PMDA按照摩尔比为(0.85~1.05):(1.05~1.25)的比例加入DMF中,在0~8℃下低温缩聚合成聚酰胺酸,聚酰胺酸质量浓度为12~20wt%,得到黄色均匀粘稠状液体后,静置消泡,然后经去离子水溶剂置换后,冷冻干燥,得到的黄色固体即为PAA,研磨成粉末备用。
2)前驱体溶液的制备:取适量PAA粉末,丙酮与DMF;
将丙酮与DMF按照体积比为(3-7):(2-6)的比例混合,常温密封搅拌10~60min,加入PAA粉末,超声分散5~10min后,磁力搅拌12~24h,至粉末分散均匀;
3)静电纺丝制备多孔取上述溶液添加到静电纺丝的针管中,加压12~26kV,纺丝液流速0.3~4mL/h,针头距接收板距离为8~20cm,接受液为去离子水或乙醇溶液;经砂芯漏斗过滤后得到黄色颗粒,60℃真空干燥12~24h,真空脱气24h;
4)得到的颗粒在高温管式炉中,N2环境下,进行阶段升温反应后处理:
①25~150℃,5~15℃/min,退火30~60min;
②~250℃,10~20℃/min,退火30~60min;
③~300℃,10~30℃/min,退火60~90min;
5)最终,得到一种耐高温的聚酰亚胺基多孔微球。
下面结合具体实施例对本发明进行详细说明:
实施例1
一种聚酰亚胺基多孔微球的制备方法,其原料组分及用量如下:
1)在300mLDMF溶液中,按照摩尔质量比为1.25:0.85,加入PMDA与ODA,在8℃下进行20h低温缩聚反应,将合成的PAA溶液在真空干燥箱中进行4h脱气,而后冷冻干燥20h,研磨成粉末备用;
2)按照质量比为3:6,将丙酮与DMF混合均匀;将适量PAA粉末溶于上述溶液,400W超声分散10min,室温下搅拌20h,得到均匀溶液,溶液粘度为10Pa·s;将上述溶液倒入针管中进行静电纺丝,纺丝电压为26KV,纺丝液流速为4ml/h,针头距接收板的距离为20cm,接收器为去离子水;水中会出现大量黄色液滴,待液滴稳定后,经砂芯漏斗过滤后得到黄色颗粒;将得到的颗粒在真空干燥箱中60℃,真空脱气20h。
3)将上述颗粒在高温管式炉中,N2环境下,进行阶段升温反应后处理:
①25~150℃,15℃/min,退火60min;
②~250℃,20℃/min,退火60min;
③~300℃,30℃/min,退火90min,即得到聚酰亚胺基纳米孔隙的微球。
实施例2
一种聚酰亚胺基多孔微球的制备方法,其原料组分及用量如下:
1)在300mLDMF溶液中,按照摩尔质量比为1.05:0.85,加入PMDA与ODA,在2℃下进行24h低温缩聚反应,将合成的PAA溶液在真空干燥箱中进行4h脱气,而后冷冻干燥24h,研磨成粉末备用;
2)按照质量比为3:5,将丙酮与DMF混合均匀;将适量PAA粉末溶于上述溶液,400W超声分散5min,室温下搅拌24h,得到均匀溶液,溶液粘度为10Pa·s;将上述溶液倒入针管中进行静电纺丝,纺丝电压为12KV,纺丝液流速为0.5ml/h,针头距接收板的距离为15cm,接收器为去离子水;水中会出现大量黄色液滴,待液滴稳定后,经砂芯漏斗过滤后得到黄色颗粒;将得到的颗粒在真空干燥箱中60℃,真空脱气24h。
3)将上述颗粒在高温管式炉中,N2环境下,进行阶段升温反应后处理:
①25~150℃,5℃/min,退火30min;
②~250℃,10℃/min,退火30min;
③~300℃,10℃/min,退火60min,即得到聚酰亚胺基纳米孔隙的微球。
实施例3
一种聚酰亚胺基多孔微球的制备方法,其原料组分及用量如下:
1)在300mLDMF溶液中,按照摩尔质量比为1.05:1.05,加入PMDA与ODA,在0℃下进行20h低温缩聚反应,将合成的PAA溶液在真空干燥箱中进行4h脱气,而后冷冻干燥18h,研磨成粉末备用;
2)按照质量比为7:2,将丙酮与DMF混合均匀;将适量PAA粉末溶于上述溶液,450W超声分散10min,室温下搅拌12h,得到均匀溶液,溶液粘度为10Pa·s;将上述溶液倒入针管中进行静电纺丝,纺丝电压为26KV,纺丝液流速为0.3ml/h,针头距接收板的距离为8cm,接收器为去离子水;水中会出现大量黄色液滴,待液滴稳定后,经砂芯漏斗过滤后得到黄色颗粒;将得到的颗粒在真空干燥箱中60℃,真空脱气18h。
3)将上述颗粒在高温管式炉中,N2环境下,进行阶段升温反应后处理:
①25~150℃,10℃/min,退火50min;
②~250℃,15℃/min,退火50min;
③~300℃,20℃/min,退火70min,即得到聚酰亚胺基纳米孔隙的微球。
实施例4
一种聚酰亚胺基多孔微球的制备方法,其原料组分及用量如下:
1)在300mLDMF溶液中,按照摩尔质量比为1.25:0.85,加入PMDA与ODA,在6℃下进行24h低温缩聚反应,将合成的PAA溶液在真空干燥箱中进行4h脱气,而后冷冻干燥24h,研磨成粉末备用;
2)按照质量比为7:6,将丙酮与DMF混合均匀;将适量PAA粉末溶于上述溶液,500W超声分散8min,室温下搅拌24h,得到均匀溶液,溶液粘度为10Pa·s;将上述溶液倒入针管中进行静电纺丝,纺丝电压为26KV,纺丝液流速为2ml/h,针头距接收板的距离为10cm,接收器为去离子水;水中会出现大量黄色液滴,待液滴稳定后,经砂芯漏斗过滤后得到黄色颗粒;将得到的颗粒在真空干燥箱中60℃,真空脱气24h。
3)将上述颗粒在高温管式炉中,N2环境下,进行阶段升温反应后处理:
①25~150℃,5℃/min,退火40min;
②~250℃,10℃/min,退火50min;
③~300℃,10℃/min,退火50min,即得到聚酰亚胺基纳米孔隙的微球。
实施例5
1)聚酰胺酸粉末的制备:取原料4,4’-二氨基二苯醚(ODA),均苯四甲酸二酐(PMDA),N,N’-二甲基甲酰胺(DMF);
将ODA与PMDA按照摩尔比为1:1的比例加入DMF中,在5℃下低温缩聚合成聚酰胺酸,聚酰胺酸质量浓度为12wt%,得到黄色均匀粘稠状液体后,静置消泡,然后经去离子水溶剂置换后,冷冻干燥,得到的黄色固体即为PAA,研磨成粉末备用。
2)前驱体溶液的制备:取适量PAA粉末,丙酮与DMF;
将丙酮与DMF按照体积比为5:4的比例混合,常温密封搅拌10min,加入PAA粉末,超声分散5min后,磁力搅拌12h,至粉末分散均匀;
3)静电纺丝制备多孔取上述溶液添加到静电纺丝的针管中,加压12kV,纺丝液流速0.3mL/h,针头距接收板距离为8cm,接受液为去离子水或乙醇溶液;经砂芯漏斗过滤后得到黄色颗粒,60℃真空干燥12h,真空脱气24h;
4)得到的颗粒在高温管式炉中,N2环境下,进行阶段升温反应后处理:
①25~150℃,5℃/min,退火30min;
②~250℃,10℃/min,退火30min;
③~300℃,10℃/min,退火60min;
5)最终,得到一种耐高温的聚酰亚胺基多孔微球。
实施例6
1)聚酰胺酸粉末的制备:取原料4,4’-二氨基二苯醚(ODA),均苯四甲酸二酐(PMDA),N,N’-二甲基甲酰胺(DMF);
将ODA与PMDA按照摩尔比为1.05:1.25的比例加入DMF中,在8℃下低温缩聚合成聚酰胺酸,聚酰胺酸质量浓度为20wt%,得到黄色均匀粘稠状液体后,静置消泡,然后经去离子水溶剂置换后,冷冻干燥,得到的黄色固体即为PAA,研磨成粉末备用。
2)前驱体溶液的制备:取适量PAA粉末,丙酮与DMF;
将丙酮与DMF按照体积比为3:2的比例混合,常温密封搅拌60min,加入PAA粉末,超声分散10min后,磁力搅拌24h,至粉末分散均匀;
3)静电纺丝制备多孔取上述溶液添加到静电纺丝的针管中,加压26kV,纺丝液流速4mL/h,针头距接收板距离为20cm,接受液为去离子水或乙醇溶液;经砂芯漏斗过滤后得到黄色颗粒,60℃真空干燥24h,真空脱气24h;
4)得到的颗粒在高温管式炉中,N2环境下,进行阶段升温反应后处理:
①25~150℃,15℃/min,退火60min;
②~250℃,20℃/min,退火60min;
③~300℃,30℃/min,退火90min;
5)最终,得到一种耐高温的聚酰亚胺基多孔微球。
图1是聚酰亚胺微球的实物图,微球呈淡黄色球体,微球的直径在300~500μm;图2是聚酰亚胺微球的SEM图,由图2中a可知,微球表面分布大量孔隙,分布均匀;由图2中b可知,孔隙直径在1μ知左右;图3为聚酰亚胺微球的N2吸附曲线图,由图可知,微球的比表面积在18.36cm3/g;图4为聚酰亚胺微球的介孔微孔分布图,可知微球内部孔隙直径为(1.2±0.6)μ.。
以上内容是对本发明所作的进一步详细说明,不能认定本发明的具体实施方式仅限于此,对于本发明所属技术领域的普通技术人员来说,在不脱离本发明构思的前提下,还可以做出若干简单的推演或替换,都应当视为属于本发明由所提交的权利要求书确定保护范围。

Claims (4)

1.一种耐高温的聚酰亚胺基多孔微球的制备方法,其特征在于,包括如下步骤:
首先选用二胺和二酐进行缩聚反应,溶剂置换冷冻干燥后得到聚酰胺酸粉末;
所述聚酰胺酸粉末的制备方法具体为:
将4,4’-二氨基二苯醚与均苯四甲酸二酐加入N,N’-二甲基甲酰胺中,在0~8℃下低温缩聚合成聚酰胺酸,得到黄色均匀粘稠状液体后,静置消泡,然后经去离子水溶剂置换后,冷冻干燥,得到的黄色固体即为PAA,研磨成聚酰胺酸粉末;
然后聚酰胺酸粉末加入丙酮与DMF的混合溶剂中,前驱体溶液;
所述前驱体溶液的制备方法具体为:
将丙酮与N,N’-二甲基甲酰胺混合,加入PAA粉末,超声分散5~10min后,磁力搅拌12~24h,至粉末分散均匀;
丙酮与N,N’-二甲基甲酰胺按照体积比为(3-7):(2-6)的比例混合;
再将前驱体溶液进行静电纺丝,接受液为极性溶剂,得到前驱体微球颗粒;
静电纺丝中的接受液为乙醇或去离子水;
最后前驱体微球颗粒进行高温热酰亚胺化,最终得到多孔的聚酰亚胺微球;
聚酰亚胺微球呈淡黄色球体,直径在300~500μm;微球表面分布大量孔隙,分布均匀;微球内部孔隙直径为(1.2±0.6)μm;
所述聚酰胺酸质量浓度为12~20wt%。
2.根据权利要求1所述的一种耐高温的聚酰亚胺基多孔微球的制备方法,其特征在于,所述4,4’-二氨基二苯醚与均苯四甲酸二酐按照摩尔比为(0.85~1.05):(1.05~1.25)。
3.根据权利要求1所述的一种耐高温的聚酰亚胺基多孔微球的制备方法,其特征在于,静电纺丝具体工艺为:
将前驱体溶液添加到静电纺丝的针管中,加压12~26kV,纺丝液流速0.3~4mL/h,针头距接收板距离为8~20cm,接受液为去离子水或乙醇溶液;经砂芯漏斗过滤后得到黄色颗粒,60℃真空干燥12~24h,真空脱气24h。
4.一种耐高温的聚酰亚胺基多孔微球,其特征在于,由权利要求1~3任一项所述的制备方法制得。
CN201911377946.9A 2019-12-27 2019-12-27 一种耐高温的聚酰亚胺基多孔微球及其制备方法 Active CN111040239B (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911377946.9A CN111040239B (zh) 2019-12-27 2019-12-27 一种耐高温的聚酰亚胺基多孔微球及其制备方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911377946.9A CN111040239B (zh) 2019-12-27 2019-12-27 一种耐高温的聚酰亚胺基多孔微球及其制备方法

Publications (2)

Publication Number Publication Date
CN111040239A CN111040239A (zh) 2020-04-21
CN111040239B true CN111040239B (zh) 2022-07-08

Family

ID=70239215

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911377946.9A Active CN111040239B (zh) 2019-12-27 2019-12-27 一种耐高温的聚酰亚胺基多孔微球及其制备方法

Country Status (1)

Country Link
CN (1) CN111040239B (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111704718B (zh) * 2020-06-04 2021-08-31 东华大学 一种具有多级结构聚酰亚胺电极材料的制备方法
CN113921990A (zh) * 2021-09-26 2022-01-11 安徽国风塑业股份有限公司 一种高耐热、高击穿的锂电池微孔隔膜及其制备方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013256732A (ja) * 2012-06-12 2013-12-26 Ube Ind Ltd ポリイミド繊維の製造方法
CN104817707A (zh) * 2015-04-05 2015-08-05 北京化工大学 一种高通量聚酰亚胺纳滤膜的制备方法
CN105869925A (zh) * 2016-05-10 2016-08-17 扬州大学 一种氮掺杂ca/pan基碳微球电极材料的制备方法
CN109735917A (zh) * 2018-12-19 2019-05-10 长沙新材料产业研究院有限公司 一种三元共聚聚酰亚胺纺丝液及制备方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013256732A (ja) * 2012-06-12 2013-12-26 Ube Ind Ltd ポリイミド繊維の製造方法
CN104817707A (zh) * 2015-04-05 2015-08-05 北京化工大学 一种高通量聚酰亚胺纳滤膜的制备方法
CN105869925A (zh) * 2016-05-10 2016-08-17 扬州大学 一种氮掺杂ca/pan基碳微球电极材料的制备方法
CN109735917A (zh) * 2018-12-19 2019-05-10 长沙新材料产业研究院有限公司 一种三元共聚聚酰亚胺纺丝液及制备方法

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
聚酰亚胺及其纤维的研究与开发进展(Ⅱ);朱璇等;《合成技术及应用》;20130628;第28卷(第02期);全文 *
聚酰亚胺纳米纤维的功能化及性能研究;李学佳;《中国博士学位论文全文数据库 工程科技Ⅰ辑》;20151115;第15-23页 *

Also Published As

Publication number Publication date
CN111040239A (zh) 2020-04-21

Similar Documents

Publication Publication Date Title
CN111040239B (zh) 一种耐高温的聚酰亚胺基多孔微球及其制备方法
CN108530673B (zh) 一种线型聚酰亚胺气凝胶及其制备方法
CN106215720B (zh) 一种掺杂石墨烯量子点耐有机溶剂超滤膜的制备方法、所制备的超滤膜以及该超滤膜的应用
Yao et al. Robust strong electrospun polyimide composite nanofibers from a ternary polyamic acid blend
JP5605566B2 (ja) 多孔質ポリイミド膜の製造方法
CN103147253B (zh) 一种高强度聚酰亚胺纳米纤维多孔膜及其制备方法和应用
CN108404823B (zh) 一种静电纺丝制备高吸水3d纳米纤维气凝胶的方法及其所得材料
CN101125955A (zh) 聚酰亚胺/二氧化硅空心微球复合薄膜的制备方法
CN101837254B (zh) 一种耐溶剂聚酰亚胺纳滤膜的制备方法
CN104817707B (zh) 一种高通量聚酰亚胺纳滤膜的制备方法
CN106237862A (zh) 中空纤维气体分离膜及其制备方法
JP2011111470A (ja) 多孔質ポリイミドおよびその製造方法
CN106866997A (zh) 一种纳米多孔聚酰亚胺气凝胶的制备方法
CN109860485B (zh) 一种聚酰亚胺纳米纤维隔膜及其制造方法
Qiao et al. Hydrophobic, Pore‐Tunable Polyimide/Polyvinylidene Fluoride Composite Aerogels for Effective Airborne Particle Filtration
KR101739842B1 (ko) 마이크로 다공성 구조의 폴리이미드 스폰지 및 이의 제조방법
CN111518390A (zh) 一种高导热石墨烯原位改性聚酰亚胺多孔材料及其制法
CN104211980A (zh) 一种低介电常数聚酰亚胺薄膜及其制备方法
CN105636678B (zh) 用于膜蒸馏的热重排聚(苯并*唑-酰亚胺)共聚物分离膜及其制造方法
CN108939952A (zh) 一种油水分离用pmia超疏水纳米纤维膜及制备方法
CN111498827B (zh) 3d热致重排聚合物基多孔氮掺杂碳材料及其制备方法
CN104157630A (zh) 一种超低介电常数聚酰亚胺薄膜及其制备方法
CN109853135B (zh) 一种聚苯并咪唑包覆聚酰亚胺纳米纤维的核壳结构纳米纤维膜及其制备方法
Wu et al. Preparation and characterization of highly hydrophobic fluorinated polyimide aerogels cross-linked with 2, 2′, 7, 7′-Tetraamino-9, 9′-spirobifluorene
CN113713573A (zh) 一种高透气性有机-无机复合纤维气体分离膜的制备方法

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant