CN106750251B - 一种含有聚醚酰胺嵌段共聚物具有互穿网络结构的新型材料及其应用 - Google Patents
一种含有聚醚酰胺嵌段共聚物具有互穿网络结构的新型材料及其应用 Download PDFInfo
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- CN106750251B CN106750251B CN201610995548.3A CN201610995548A CN106750251B CN 106750251 B CN106750251 B CN 106750251B CN 201610995548 A CN201610995548 A CN 201610995548A CN 106750251 B CN106750251 B CN 106750251B
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- acrylate
- block copolymer
- polyether amide
- amide block
- methacrylate
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- 239000000463 material Substances 0.000 title claims abstract description 56
- 229920002614 Polyether block amide Polymers 0.000 title claims abstract description 42
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- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 40
- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 32
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- 238000000926 separation method Methods 0.000 claims abstract description 14
- 150000002148 esters Chemical class 0.000 claims abstract description 11
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- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 9
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims abstract description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 60
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 41
- 239000007789 gas Substances 0.000 claims description 37
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 33
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 30
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- 239000001569 carbon dioxide Substances 0.000 claims description 28
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 25
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- ISAOCJYIOMOJEB-UHFFFAOYSA-N benzoin Chemical class C=1C=CC=CC=1C(O)C(=O)C1=CC=CC=C1 ISAOCJYIOMOJEB-UHFFFAOYSA-N 0.000 claims description 8
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- FTALTLPZDVFJSS-UHFFFAOYSA-N 2-(2-ethoxyethoxy)ethyl prop-2-enoate Chemical compound CCOCCOCCOC(=O)C=C FTALTLPZDVFJSS-UHFFFAOYSA-N 0.000 claims description 6
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- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 claims description 4
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- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 4
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 claims description 4
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- OKKRPWIIYQTPQF-UHFFFAOYSA-N Trimethylolpropane trimethacrylate Chemical compound CC(=C)C(=O)OCC(CC)(COC(=O)C(C)=C)COC(=O)C(C)=C OKKRPWIIYQTPQF-UHFFFAOYSA-N 0.000 claims description 4
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- BQZJOQXSCSZQPS-UHFFFAOYSA-N 2-methoxy-1,2-diphenylethanone Chemical compound C=1C=CC=CC=1C(OC)C(=O)C1=CC=CC=C1 BQZJOQXSCSZQPS-UHFFFAOYSA-N 0.000 claims description 3
- GNSFRPWPOGYVLO-UHFFFAOYSA-N 3-hydroxypropyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCCO GNSFRPWPOGYVLO-UHFFFAOYSA-N 0.000 claims description 3
- QZPSOSOOLFHYRR-UHFFFAOYSA-N 3-hydroxypropyl prop-2-enoate Chemical compound OCCCOC(=O)C=C QZPSOSOOLFHYRR-UHFFFAOYSA-N 0.000 claims description 3
- 150000001336 alkenes Chemical class 0.000 claims description 3
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims description 3
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- TXTWXQXDMWILOF-UHFFFAOYSA-N (2-ethoxy-2-oxoethyl)azanium;chloride Chemical compound [Cl-].CCOC(=O)C[NH3+] TXTWXQXDMWILOF-UHFFFAOYSA-N 0.000 claims description 2
- PSGCQDPCAWOCSH-UHFFFAOYSA-N (4,7,7-trimethyl-3-bicyclo[2.2.1]heptanyl) prop-2-enoate Chemical compound C1CC2(C)C(OC(=O)C=C)CC1C2(C)C PSGCQDPCAWOCSH-UHFFFAOYSA-N 0.000 claims description 2
- MSAHTMIQULFMRG-UHFFFAOYSA-N 1,2-diphenyl-2-propan-2-yloxyethanone Chemical compound C=1C=CC=CC=1C(OC(C)C)C(=O)C1=CC=CC=C1 MSAHTMIQULFMRG-UHFFFAOYSA-N 0.000 claims description 2
- HIXDQWDOVZUNNA-UHFFFAOYSA-N 2-(3,4-dimethoxyphenyl)-5-hydroxy-7-methoxychromen-4-one Chemical compound C=1C(OC)=CC(O)=C(C(C=2)=O)C=1OC=2C1=CC=C(OC)C(OC)=C1 HIXDQWDOVZUNNA-UHFFFAOYSA-N 0.000 claims description 2
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- WDQMWEYDKDCEHT-UHFFFAOYSA-N 2-ethylhexyl 2-methylprop-2-enoate Chemical compound CCCCC(CC)COC(=O)C(C)=C WDQMWEYDKDCEHT-UHFFFAOYSA-N 0.000 claims description 2
- DBCAQXHNJOFNGC-UHFFFAOYSA-N 4-bromo-1,1,1-trifluorobutane Chemical compound FC(F)(F)CCCBr DBCAQXHNJOFNGC-UHFFFAOYSA-N 0.000 claims description 2
- DXPPIEDUBFUSEZ-UHFFFAOYSA-N 6-methylheptyl prop-2-enoate Chemical group CC(C)CCCCCOC(=O)C=C DXPPIEDUBFUSEZ-UHFFFAOYSA-N 0.000 claims description 2
- COCLLEMEIJQBAG-UHFFFAOYSA-N 8-methylnonyl 2-methylprop-2-enoate Chemical compound CC(C)CCCCCCCOC(=O)C(C)=C COCLLEMEIJQBAG-UHFFFAOYSA-N 0.000 claims description 2
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Abstract
本发明公开了一种含有聚醚酰胺嵌段共聚物具有互穿网络结构的新型材料,所述的聚醚酰胺嵌段共聚物的结构式如式(I)所示:其中,m=1‑5,n=1‑3,p=1‑200,m,n,p均为整数;新型材料包括25‑84%的聚醚酰胺嵌段共聚物,5‑20%的丙烯酸、甲基丙烯酸、丙烯酸酯或甲基丙烯酸酯中的一种或多种,10‑50%的含有双键的聚乙二醇衍生物,1‑5%的UV光引发剂。它具有聚氧化乙烯软段含量高、聚氧化乙烯链段在常温之下处于无定型态、材料拉伸强度较高等优点;该共聚物材料制成的气体分离膜对对二氧化碳气体分子具有较高的选择性吸附能力,是一种潜在的高效分离膜材料,
Description
技术领域
本发明属于气体分离薄膜领域,具体地说,涉及一种含有聚醚酰胺嵌段共聚物具有互穿网络结构的新型材料及其应用。
背景技术
化石燃料燃烧产生的二氧化碳是造成气候变暖的主要原因,我国于2006年成为全球最大的二氧化碳排放国,2013年年排放量占到全球总量的27%,其主要原因在于中国的一次能源消耗主要依赖于化石燃料,占比为73.8%,而美国的比例是50%。对于火力发电厂,有两种方法来控制二氧化碳排放:其一,燃烧前捕捉,例如联合气化综合技术,它先将燃煤转化为合成气,即二氧化碳和氢气的混合物,然后再燃烧发电,该技术可以显著提高电厂效率,减少燃煤使用。该技术中关键的一个工艺就是从合成气中分离出二氧化碳,而且合成气中的二氧化碳含量要比燃烧之后的废气中二氧化碳的要高。可以将二氧化碳从合成气中先分离出来,需要具有较高二氧化碳/氢气分离效率的工艺。其二,燃烧后捕捉,燃煤燃烧之后的废气经过脱硫之后含有水汽、二氧化碳、氮气。需要具有较高二氧化碳/氮气分离效率的工艺。此外,对于石化工厂,氢气主要是通过碳烃化合物转化而来。所制得的氢气中含有二氧化碳杂质,制备高纯氢气也需要将二氧化碳分离去除。因此开发新型技术用于二氧化碳气体分离具有重大的实用价值。
传统的从混合气体中分离二氧化碳方法包括变压吸附技术、胺溶剂吸附、低温精馏。这些技术能耗大,工艺设备要求高。近年来,科研人员开发了基于高分子膜的气体分离技术,因为它能耗低、运行成本低。例如,美国Membrane Technology and ResearchIncorporation公司近期推出了用于分离CO2/H2的高分子膜的概念产品。总体而言,按照作用机理划分,有两类高分子分离膜,玻璃态高分子和橡胶肽高分子。
玻璃态高分子如聚酰亚胺和纤维素衍生物,可以制作成力学强度高的分离膜,其自由孔洞尺寸可调,因而根据气体分子尺寸可以选择性地允许诸如氢气这样的小分子穿过膜,而将尺寸大的二氧化碳分子挡在一侧。该类产品如日本宇部公司开发的Matrimid材料。
橡胶态高分子如聚二甲基硅烷,含有聚氧化乙烯链段的聚合物具有逆向选择能力。二氧化碳分子能够被这类膜吸附,并通过膜内无定型相区扩散,并在另一层释放出来。因为二氧化碳分子具有四极矩,有利于它和极性醚氧键发生作用。相比而言,非极性的气体如氢气,氮气,甲烷的分子与醚氧键没有这种相互作用,因此它们在橡胶态高分子膜中的溶解度很低,最终使得二氧化碳/非极性气体的选择性较高。此外,柔性的醚氧键也使得二氧化碳分子具有较高的透过率。
然而,含有PEO链段的高分子容易结晶,且力学强度低,因而不利于其工业运用。研究人员采取了多种方式来克服上述缺点,例如设计合成含有刚性链段的共聚物、化学交联、与其它无机填料混合来改进PEO基的二氧化碳选择性吸附膜材料。含有PEO链段的交替嵌段共聚物因为可以很方便地溶于溶剂或者加热熔化加工,因而受到广泛关注。它的性能可以通过选择合适的刚性链段和合适长度的PEO链段而进行较好的调控。柔性的PEO链段通常具有较低的玻璃化转变温度,提供柔性和二氧化碳通过性能,刚性链段能带来机械强度和热稳定性。
已经发表的文献报道了使用多种刚性硬段来制备含有PEO链段的共聚物。其中聚醚酰胺嵌段共聚物,如法国阿科玛公司Pebax系列产品,经常作为二氧化碳选择性吸附材料。Pebax MV1074含有55wt%的PEO链段以及45wt%聚酰胺12链段;Pebax MH1657含有60wt%的PEO链段以及40wt%聚酰胺6链段。它们都具有显著的微相分离的聚集态特征。研究人员向上述树脂中添加聚倍半硅氧烷、碳纳米管、分子筛、硅粉、石墨烯等无机填料来制备复合薄膜以改善性能。含有胺基的有机组分也可以加入其中来提高选择性,因为它可以与酸性的二氧化碳分子进行可逆的反应。但是对于两种Pebax树脂,酰胺刚性链段的结晶度较低,使得部分硬段溶解于软段PEO相区,使得气体透过性能下降。与此同时,PEO链段会在一定温度下结晶,降低了可以用于运输二氧化碳分子的无定型态的含量,同时降低了位于相邻刚性链段之间的柔性PEO链段的长度。研究人员需要考虑设计合成新型PEO基共聚物来实现高的气体选择性吸附的性能。
只有极少数的研究能够达到上述要求,Husken等人使用单分散的芳香族酰胺键硬段与PEO软段共聚获得PEO-T6T6T共聚物。其硬段结晶度高达85%,提高了软段与硬段的相分离程度,进而提高了共聚物薄膜的二氧化碳选择性吸附能力。Reijerkerk等人使用一个短的刚性链段TΦT与PEO链段共聚。他们也设计合成了基于PEO和PPO共聚聚醚软段与T6T6T刚性硬段的共聚物,PPO链段能够通过打乱PEO链的堆积阻碍PEO链段的结晶。上述研究设计共聚物分子结构并调控其聚集态形貌,但是没有使用互穿网络方法进一步提高氧化乙烯链段的质量比例。
中国专利申请公开第CN102137709A介绍了一种含有聚醚酰胺嵌段共聚物的复合薄膜的制备以及气体分离性能测试。使用Arkema公司Pebax MH1657作为基体树脂,使用多种聚乙二醇醚作为添加剂,通过溶液共混之后再进行浇铸方法制备了薄膜。该薄膜材料基于商品化的树脂,通过添加聚乙二醇醚来提高膜材料内发挥气体分离作用的氧化乙烯醚单元的含量,已达到提高二氧化碳/氮气等气体选择性透过率。但是由于添加的聚氧化乙烯醚分子量不大,存在使用过程中迁移出基体的可能性,此外还会导致复合薄膜力学强度下降。
中国专利申请公开第CN103391804A介绍了一种氟聚物气体分离薄膜的制备以及气体分离性能测试。使用结晶度较低或者非晶性PVDF或者ETFE聚合物溶解于特定溶剂制成薄膜材料,该类材料化学稳定性好,可以在严苛的腐蚀性环境中使用。由于使用的高分子结晶度低,使得材料本体强度不高,往往需要支撑层来提供强度,这往往造成新的界面生成,对二氧化碳气体分子在薄膜中运输不利,此外含氟聚合物价格较高。
中国专利申请公开第CN102686643A介绍了一种双草酰胺材料。首先合成具有式(3)结构的双草酸酰胺化合物,再与聚醚二元醇如聚四氢呋喃二醇PTMEG或者聚丙二醇PPG进行本体熔融缩聚合成高分子。通过上述方法可以制备出本体强度高,断裂伸长率大的新型弹性体材料。但是该专利并不涉及使用草酰胺作为硬段,聚乙二醇PEG作为软段合成具有气体分离性能优良的新型材料,也没有使用互穿网络方法进一步提高氧化乙烯链段的质量比例。
鉴于以上原因,特提出本发明。
发明内容
本发明的第一目的在于提供了一种聚醚酰胺嵌段共聚物,所述的聚醚酰胺嵌段共聚物包括聚氧化乙烯软段和双草酸酰胺硬段,结构式如式(I)所示:
其中,m=1-5,n=1-3,p=1-200,m,n,p均为整数;m代表双草酸酰胺硬段所使用的脂肪族二胺所含亚甲基数目;n代表双草酸酰胺硬段所使用的氨基酸封端剂亚甲基数目;p代表聚氧化乙烯链段的数目。
本发明使用双草酸酰胺二酯硬段和聚乙二醇软段经过本体熔融缩聚制备一种新型聚醚酰胺嵌段共聚物,双草酸酰胺硬段相互作用强,结晶度高,聚氧化乙烯软链段的结晶受到限制作用使得其结晶温度降低。
进一步的,聚氧化乙烯软段含量占所述的聚醚酰胺嵌段共聚物质量分数的65-85%,双草酸酰胺硬段占所述的聚醚酰胺嵌段共聚物质量分数的35-15%。
本发明的第二目的提供了一种聚醚酰胺嵌段共聚物的制备方法,所述的聚醚酰胺嵌段共聚物的制备方法包括如下步骤:
(1)首先往反应容器中加入过量的草酸二乙酯,然后将溶有一定量的脂肪族二胺的四氢呋喃溶液逐步加入反应容器,在温度20-60℃,优选20-40℃,常压,搅拌反应30-50h,优选30-40h,过滤,用四氢呋喃清洗,在40℃下真空干燥10h,得到如结构式(II)的物质:
(2)将适量的甘氨酸乙酯盐酸盐、缚酸剂和式(II)物质溶于三氯甲烷中,在50-80℃,优选60-70℃下,搅拌反应30-60h,优选40-50h,过滤,依次用乙醇、氯仿和乙醚清洗,在65℃真空干燥24h,得到如结构式(III)的物质:
(3)往反应器中加入聚乙二醇软段和催化剂,在温度180-230℃,优选200-260℃,最优选220-240℃,压力1-6MPa,优选2-4MPa,进行反应2-3h,降压,抽真空到20-1000Pa,经2-4h去除反应体系中的水,得到所述的聚醚酰胺嵌段共聚物。
进一步的,步骤(3)中所述的催化剂的结构式为M(OR1)4,M为钛、锆或铪,R1可以相同或不同,为1-24个碳原子的烷基。
其中,催化剂是指使得双草酸酰胺嵌段以及聚氧化乙烯软段嵌段更容易进行聚合反应的任何化合物及其混合物,R1可以是线型的或者支链的。
本发明的第三目的是提供了一种含有上述的聚醚酰胺嵌段共聚物具有互穿网络结构新型材料,包括25-84%的聚醚酰胺嵌段共聚物,5-20%的丙烯酸、甲基丙烯酸、丙烯酸酯或甲基丙烯酸酯中的一种或多种,10-50%的含有双键的聚乙二醇衍生物,1-5%的UV光引发剂。
本发明具有互穿网络结构的新型材料是一种以双草酸酰胺作为硬段、聚氧化乙烯软段的聚醚酰胺嵌段共聚物,再以该共聚物为基体,添加UV光活性物质以及含有双键的PEG衍生物,经过溶液浇铸成薄膜,经过UV光引发剂形成第二网络的互穿网络结构的新型材料,该材料具有聚氧化乙烯链段含量高,聚氧化乙烯链段在室温之下处于无定型态,材料拉伸强度较高,使用该共聚物材料制成的气体分离膜对二氧化碳气体分子具有较高的选择性吸附能力,是一种潜在的高效分离膜材料。
进一步的,所述的含有双键的聚乙二醇衍生物的结构式为式(IV)和/或式(V):
其中,m=1-20,优选m=15-12,R2代表具有1-24个碳原子的烷基,它可以是线型的或者支链的,m代表所使用的单官能度PEG衍生物所含氧化乙烯单元数目,n代表所使用的双官能度PEG衍生物所含氧化乙烯单元数目,R3、R4、R5代表具有H原子或者1-24个碳原子的烷基,它可以是线型的或者支链的,n=1-20,优选n=5-12,m和n均为整数。
进一步的,所述的UV光引发剂为二苯甲酮、取代的二苯甲酮、苯乙酮、取代的苯乙酮、苯偶姻及其烷基酯、苯偶姻甲醚、苯偶姻乙醚、苯偶姻异丙醚、N-甲级二乙醇胺二苯甲酮、2-羟基-甲基-1-苯基丙-1-酮、2-苄基-2-(二甲基氨基)-1-[4-(4-吗啉基)苯基]-1-丁酮或二苯基(2,4,6-三甲基苯甲酰基)氧化磷中的一种或几种。
进一步的,所述的丙烯酸酯为丙烯酸甲酯、丙烯酸乙酯、丙烯酸丁酯、丙烯酸2-(2-乙氧基乙氧基)乙酯、丙烯酸四氢呋喃酯、丙烯酸月桂酯、丙烯酸异辛酯、丙烯酸异癸酯、丙烯酸2-苯氧基乙酯、丙烯酸2-乙基己酯、丙烯酸异冰片酯、丙烯酸二环戊烯氧基乙酯、丙烯酸2-羟基丁酯、丙烯酸羟丙酯、己内酯丙烯酸酯、吗啉丙烯酸酯、二丙烯酸己二醇酯、乙二醇二丙烯酸酯、三羟甲基丙烷三丙烯酸酯、季戊四醇四氢呋喃丙烯酸酯、乙二醇二环戊烯基醚丙烯酸酯或丙烯酸羟丙酯中的一种或几种;所述的甲基丙烯酸甲酯为甲基丙烯酸甲酯、甲基丙烯酸乙酯、甲基丙烯酸丁酯、甲基丙烯酸四氢呋喃酯、甲基丙烯酸月桂酯、甲基丙烯酸异辛酯、甲基丙烯酸异癸酯、甲基丙烯酸2-乙基己酯、甲基丙烯酸异冰片酯、甲基丙烯酸二环戊烯氧基乙酯、甲基丙烯酸2-羟基丁酯、甲基丙烯酸羟丙酯、吗啉甲基丙烯酸酯、二甲基丙烯酸己二醇酯、乙二醇二甲基丙烯酸酯、三羟甲基丙烷三甲基丙烯酸酯、季戊四醇四氢呋喃甲基丙烯酸酯、乙二醇二环戊烯基醚甲基丙烯酸酯或甲基丙烯酸羟丙酯中的一种或几种。
本发明的第四目的提供了一种含有上述的聚醚酰胺嵌段共聚物具有互穿网络结构新型材料的制备方法,所述的方法为将聚醚酰胺嵌段共聚物,丙烯酸、甲基丙烯酸、丙烯酸酯或甲基丙烯酸酯中的一种或多种,含有双键的聚乙二醇衍生物,UV光引发剂充分溶于有机溶剂中,搅拌均匀后浇铸成10-80um的薄膜,优选20-40um,然后经UV光照射引发反应,形成所述的新型材料;有机溶剂为卤化烃类、酯类、酮类、二醇衍生物、乙腈、吡啶、苯酚中的一种或几种,优选的,卤化烃类为氯苯、二氯苯或三氯甲烷,酯类为醋酸甲酯、醋酸乙酯或醋酸丙酯,酮类为甲醇、乙醇或异丙醇,二醇衍生物为乙二醇单甲醚、乙二醇单乙醚或乙二醇单丁醚。
首先使用双草酸酰胺二酯硬段和聚乙二醇软段经过本体熔融缩聚制备聚醚酰胺嵌段共聚物,双草酸酰胺硬段相互作用强,结晶度高,聚氧化乙烯软链段的结晶受到限制作用使得其结晶温度降低。其次,将该共聚物溶于有机溶剂如三氯甲烷,随后再加入含有双键的PEG衍生物以及UV光固化引发剂,混合均匀之后浇铸成薄膜,使用UV光照射该薄膜,引发含有双键的PEG衍生物在聚醚酰胺嵌段共聚物内部发生交联形成含有互穿网络结构的新型材料,进一步提高能够吸附输送二氧化碳气体分子的氧化乙烯链段的比例。新型聚醚酰胺嵌段共聚物中的聚氧化乙烯链段在30℃左右基本处于无定型态,添加含有双键的PEG衍生物经过UV光引发形成另一个热固性的网络,且不会使得薄膜力学性能明显下降,且Tg小于30℃。通过上述方法使得材料中氧化乙烯链段含量进一步增加,这有利于二氧化碳分子的选择性吸附,可以将混合气体中二氧化碳气体分子与其它气体分子有效地分离。
本发明的第五目的提供了上面所述的新型材料在二氧化碳气体分离领域中的应用。
采用上述技术方案,本发明的有益效果如下:本发明的含有聚醚酰胺嵌段共聚物具有互穿网络结构的新型材料是以双草酸酰胺作为硬段、聚氧化乙烯软段的聚醚酰胺嵌段共聚物为基体,UV光活性物质以及含有双键的PEG衍生物经过UV光引发在基体中形成第二网络的互穿网络结构材料。它具有聚氧化乙烯软段含量高、聚氧化乙烯链段在常温之下处于无定型态、材料拉伸强度较高等优点。使用该共聚物材料制成的气体分离膜对对二氧化碳气体分子具有较高的选择性吸附能力,是一种潜在的高效分离膜材料。
附图说明
图1:实施例1得到的聚醚酰胺嵌段共聚物的示差扫描量热法DSC曲线;
图2:实施例1得到的聚醚酰胺嵌段共聚物的工程应力应变曲线。
具体实施方式
下述实施例中的实施方案可以进一步组合或者替换,且实施例仅仅是对本发明的优选实施例进行描述,并非对本发明的构思和范围进行限定,在不脱离本发明设计思想的前提下,本领域中专业技术人员对本发明的技术方案作出的各种变化和改进,均属于本发明的保护范围。
实施例1
(1)在反应容器中加入400g草酸二乙酯,然后将溶有60g己二胺的四氢呋喃溶液200ml逐步滴加入反应容器,在温度40℃,常压,在搅拌条件下反应30h,反应结束完成之后将生成的白色颗粒产物滤出,用四氢呋喃清洗2次,放入真空烘箱中40℃干燥10小时,获得中间产物1,结构式为式(II),m为3;
(2)将38.8g谷氨酸乙酯盐酸盐、38.4g三乙胺以及40g中间产物1溶于100ml氯仿中,该混合物在温度70℃,下搅拌反应30h。随后,将白色产物过滤,分别使用乙醇清洗一次,氯仿清洗两次,乙醚清洗两次,并在真空箱中65℃干燥24h,即可获得中间产物2,结构式为式(III),n为3,m为1;
(3)取5.72g中间产物2,以及25.0g聚乙二醇PEG2000,四异丙氧基钛0.003g加入反应容器中。在氮气氛围下加热到230℃之后搅拌60min,压力为1MPa,反应3小时,随后抽真空逐渐降低反应容器内的压力至400Pa,恒压反应6h后放料获得浅黄色弹性固体,将反应物溶于氯仿,再将上述溶液倒入成有大量乙醚的容器,共聚物析出呈白色絮状物,将白色絮状物过滤,分别使用乙醇清洗一次,乙醚清洗两次,并在真空箱中65℃干燥24h,即可获得双草酸酰胺聚乙二醇共聚物OX32-PEG2000,经测定产物OX32-PEG2000的相对粘度为0.16dL/g;
(4)取OX32-PEG2000样品4.0g,0.5g乙氧基乙氧基乙基丙烯酸酯(结构式为IV),0.5g聚乙二醇600二丙烯酸酯(结构式为V),0.05g甲基丙烯酸甲酯,UV光引发剂安息香双甲醚(IRGACURE 651),溶于100ml氯仿并搅拌均匀。取上述溶液10ml倾倒在四氟乙烯模具,避光放置于通风橱中暗处避光挥发12h。再将四氟乙烯模具以及物料转移至真空箱中,45℃干燥12h便可以制的厚度均一的薄膜。将四氟乙烯模具以及薄膜放置在波长365nm的UV灯箱中照射10min,制备出含有OX32-PEG2000共聚物具有互穿网络结构的新型材料,厚度约30-40um。
对所得到的双草酸酰胺聚乙二醇共聚物进行DSC测试、拉伸试验以及弹性模量试验,所得结果如附图1、2所示。
图1显示了其差示扫描量热法DSC曲线,横坐标为温度,纵坐标为热流,降温以及升温速率为10℃/min,样品1的聚集态结构具有典型的热塑性弹性微相分离现象,在降温曲线中双草酸酰胺硬段的结晶温度56.5℃,聚氧化乙烯链段的结晶温度为7.9℃;第二次升温曲线中,聚氧化乙烯链段的熔融温度为23.5℃,双草酸酰胺硬段熔点为92.8℃。
图2显示了其工程应力-应变曲线,横坐标为伸长率,纵坐标为拉伸强度,其应力-应变曲线上并没有出现明显的屈服点,说明该样品属于典型的弹性体。其本体强度为18.3MPa,断裂伸长率为3058.3%,这说明该样品具有其优良的拉伸性能。
使用Labthink膜分离测试分析仪参考GB/T1038-2000《塑料薄膜和薄片气体透过性试验方法压差法》在30℃下测试了含OX32-PEG2000共聚物具有互穿网络结构的新型材料的气体透过率,该样品对CO2的透气系数为1.432*10-11cm3cm/(cm2sPa),对N2的透气系数为4.151*10-13cm3cm/(cm2sPa),理论分离效率为34.5。
实施例2
步骤(1)-(3)与实施例1相同,不同之处为步骤(4),取OX32-PEG2000样品3.0g,0.5g乙氧基乙氧基乙基丙烯酸酯(结构式为IV),1.5g聚乙二醇400二丙烯酸酯(结构式为V),0.05g甲基丙烯酸甲酯,UV光引发剂安息香双甲醚(IRGACURE 651),溶于100ml氯仿并搅拌均匀。取上述溶液10ml倾倒在四氟乙烯模具,避光放置于通风橱中暗处避光挥发12h。再将四氟乙烯模具以及物料转移至真空箱中,45℃干燥12h便可以制的厚度均一的薄膜。将四氟乙烯模具以及薄膜放置在波长365nm的UV灯箱中照射10min,制备出含OX32-PEG2000共聚物具有互穿网络的新型材料,厚度约30-40um。
使用Labthink膜分离测试分析仪参考GB/T1038-2000《塑料薄膜和薄片气体透过性试验方法压差法》在30℃下测试了含OX32-PEG2000共聚物具有互穿网络的互穿网络新型材料共聚物的气体透过率,该样品对CO2的透气系数为1.732*10-11cm3cm/(cm2sPa),对N2的透气系数为4.351*10-13cm3cm/(cm2sPa),理论分离效率为39.8。
实施例3
步骤(1)-(3)与实施例1相同,不同之处为步骤(4),取OX32-PEG2000样品5.0g,0.8g乙氧基乙氧基乙基丙烯酸酯(结构式为IV),1.9g聚乙二醇400二丙烯酸酯(结构式为V),0.05g甲基丙烯酸甲酯,UV光引发剂苯偶姻甲醚,溶于120ml甲醇中并搅拌均匀。取上述溶液10ml倾倒在四氟乙烯模具,避光放置于通风橱中暗处避光挥发12h。再将四氟乙烯模具以及物料转移至真空箱中,45℃干燥12h便可以制的厚度均一的薄膜。将四氟乙烯模具以及薄膜放置在波长365nm的UV灯箱中照射10min,制备出含OX32-PEG2000共聚物具有互穿网络的新型材料,厚度约10-20um。
使用Labthink膜分离测试分析仪参考GB/T1038-2000《塑料薄膜和薄片气体透过性试验方法压差法》在30℃下测试了含OX32-PEG2000共聚物具有互穿网络的互穿网络新型材料共聚物的气体透过率,试验结果与实施例1基本相同。
实施例4
(1)在反应容器中加入500g草酸二乙酯,然后将溶有70g己二胺的四氢呋喃溶液200ml逐步滴加入反应容器,在温度20℃,常压,在搅拌条件下反应50h,反应结束完成之后将生成的白色颗粒产物滤出,用四氢呋喃清洗2次,放入真空烘箱中40℃干燥10小时,获得中间产物1,结构式为式(II),m为3;
(2)将38.8g谷氨酸乙酯盐酸盐、38.4g三乙胺以及40g中间产物1溶于100ml氯仿中,该混合物在温度50℃,下搅拌反应60h。随后,将白色产物过滤,分别使用乙醇清洗一次,氯仿清洗两次,乙醚清洗两次,并在真空箱中65℃干燥24h,即可获得中间产物2,结构式为式(III),n为3,m为1;
(3)取5.72g中间产物2,以及25.0g聚乙二醇PEG2000,四异丙氧基钛0.003g加入反应容器中。在氮气氛围下加热到180℃之后搅拌60min,压力为6MPA,反应2小时,随后抽真空逐渐降低反应容器内的压力至20Pa,经过2小时去除反应体系中的水,将沉淀过滤,分别使用乙醇清洗一次,乙醚清洗两次,并在真空箱中65°C干燥24h,即可获得双草酸酰胺聚乙二醇共聚物。
(4)取双草酸酰胺聚乙二醇共聚物样品3.0g,0.3g乙氧基乙氧基乙基丙烯酸酯(结构式为IV),0.3g聚乙二醇600二丙烯酸酯(结构式为V),0.03g甲基丙烯酸甲酯,UV光引发剂安息香双甲醚(IRGACURE 651),溶于100ml氯仿并搅拌均匀。取上述溶液10ml倾倒在四氟乙烯模具,避光放置于通风橱中暗处避光挥发12h。再将四氟乙烯模具以及物料转移至真空箱中,45℃干燥12h便可以制的厚度均一的薄膜。将四氟乙烯模具以及薄膜放置在波长365nm的UV灯箱中照射10min,制备出含有OX32-PEG2000共聚物具有互穿网络结构的新型材料。
使用Labthink膜分离测试分析仪参考GB/T1038-2000《塑料薄膜和薄片气体透过性试验方法压差法》在30℃下测试了含OX32-PEG2000共聚物具有互穿网络的互穿网络新型材料共聚物的气体透过率,试验结果与实施例2基本相同。
Claims (13)
1.一种聚醚酰胺嵌段共聚物,其特征在于,所述的聚醚酰胺嵌段共聚物包括聚氧化乙烯软段和双草酸酰胺硬段,结构式如式(I)所示:
其中,m=1-5,n=1-3,p=1-200,m,n,p均为整数。
2.根据权利要求1所述的聚醚酰胺嵌段共聚物,其特征在于,聚氧化乙烯软段含量占所述的聚醚酰胺嵌段共聚物质量分数的65-85%,双草酸酰胺硬段占所述的聚醚酰胺嵌段共聚物质量分数的35-15%。
3.一种权利要求1或2所述的聚醚酰胺嵌段共聚物的制备方法,其特征在于,所述的制备方法包括如下步骤:
(1)首先往反应容器中加入过量的草酸二乙酯,然后将溶有一定量的脂肪族二胺的四氢呋喃溶液逐步加入反应容器,在温度20-60℃,常压,搅拌反应30-50h,过滤,用四氢呋喃清洗,在40℃下真空干燥10h,得到如结构式(II)的物质:
(2)将适量的甘氨酸乙酯盐酸盐、缚酸剂和式(II)物质溶于三氯甲烷中,在50-80℃,搅拌反应30-60h,过滤,依次用乙醇、氯仿和乙醚清洗,在65℃真空干燥24h,得到如结构式(III)的物质:
(3)往反应器中加入聚乙二醇软段和催化剂,在温度180-230℃,压力1-6MPa,进行反应2-3h,降压,抽真空到20-1000Pa,经2-4h去除反应体系中的水,得到所述的聚醚酰胺嵌段共聚物。
4.根据权利要求3所述的聚醚酰胺嵌段共聚物的制备方法,其特征在于,步骤1)中在温度20-40℃,常压,搅拌反应30-40h;
步骤2)中在60-70℃下,搅拌反应40-50h;
步骤3)中压力为2-4MPa。
5.根据权利要求3-4任意一项所述的聚醚酰胺嵌段共聚物的制备方法,其特征在于,步骤(3)中所述的催化剂的结构式为M(OR1)4,M为钛、锆或铪原子,R1可以相同或不同,为1-24个碳原子的烷基。
6.一种含有权利要求1或2所述的聚醚酰胺嵌段共聚物具有互穿网络结构材料,其特征在于,包括25-84%的聚醚酰胺嵌段共聚物,5-20%的丙烯酸、甲基丙烯酸、丙烯酸酯或甲基丙烯酸酯中的一种或多种,10-50%的含有双键的聚乙二醇衍生物,1-5%的UV光引发剂。
7.根据权利要求6所述的材料,其特征在于,所述的含有双键的聚乙二醇衍生物的结构式为式(IV)和/或式(V):
其中,m=1-20,R2代表具有1-24个碳原子的烷基,R3、R4、R5代表具有H原子或者1-24个碳原子的烷基,n=1-20,m和n均为整数。
8.根据权利要求7所述的材料,其特征在于,m=15-12,n=5-12。
9.根据权利要求6所述的材料,其特征在于,所述的UV光引发剂为二苯甲酮、取代的二苯甲酮、苯乙酮、取代的苯乙酮、苯偶姻及其烷基酯、苯偶姻甲醚、苯偶姻乙醚、苯偶姻异丙醚、N-甲级二乙醇胺二苯甲酮、2-羟基-甲基-1-苯基丙-1-酮、2-苄基-2-(二甲基氨基)-1-[4-(4-吗啉基)苯基]-1-丁酮或二苯基(2,4,6-三甲基苯甲酰基)氧化磷中的一种或几种。
10.根据权利要求6所述的材料,其特征在于,所述的丙烯酸酯为丙烯酸甲酯、丙烯酸乙酯、丙烯酸丁酯、丙烯酸2-(2-乙氧基乙氧基)乙酯、丙烯酸四氢呋喃酯、丙烯酸月桂酯、丙烯酸异辛酯、丙烯酸异癸酯、丙烯酸2-苯氧基乙酯、丙烯酸2-乙基己酯、丙烯酸异冰片酯、丙烯酸二环戊烯氧基乙酯、丙烯酸2-羟基丁酯、己内酯丙烯酸酯、吗啉丙烯酸酯、二丙烯酸己二醇酯、乙二醇二丙烯酸酯、三羟甲基丙烷三丙烯酸酯、季戊四醇四氢呋喃丙烯酸酯、乙二醇二环戊烯基醚丙烯酸酯或丙烯酸羟丙酯中的一种或几种;所述的甲基丙烯酸酯为甲基丙烯酸甲酯、甲基丙烯酸乙酯、甲基丙烯酸丁酯、甲基丙烯酸四氢呋喃酯、甲基丙烯酸月桂酯、甲基丙烯酸异辛酯、甲基丙烯酸异癸酯、甲基丙烯酸2-乙基己酯、甲基丙烯酸异冰片酯、甲基丙烯酸二环戊烯氧基乙酯、甲基丙烯酸2-羟基丁酯、吗啉甲基丙烯酸酯、二甲基丙烯酸己二醇酯、乙二醇二甲基丙烯酸酯、三羟甲基丙烷三甲基丙烯酸酯、季戊四醇四氢呋喃甲基丙烯酸酯、乙二醇二环戊烯基醚甲基丙烯酸酯或甲基丙烯酸羟丙酯中的一种或几种。
11.一种权利要求6-10任意一项所述的材料的制备方法,其特征在于,所述的方法为将聚醚酰胺嵌段共聚物,丙烯酸、甲基丙烯酸、丙烯酸酯或甲基丙烯酸酯中的一种或多种,含有双键的聚乙二醇衍生物,UV光引发剂充分溶于有机溶剂中,搅拌均匀后浇铸成10-80um的薄膜,然后经UV光照射引发反应,形成所述的材料;有机溶剂为卤化烃类、酯类、醇类、二醇衍生物、乙腈、吡啶、苯酚中的一种或几种。
12.根据权利要求11所述的材料的制备方法,其特征在于,搅拌均匀后浇铸成20-40um的薄膜;卤化烃类为氯苯、二氯苯或三氯甲烷,酯类为醋酸甲酯、醋酸乙酯或醋酸丙酯,醇类为甲醇、乙醇或异丙醇,二醇衍生物为乙二醇单甲醚、乙二醇单乙醚或乙二醇单丁醚。
13.一种权利要求6-10任意一项所述的材料在二氧化碳气体分离领域中的应用。
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