CN112321624A - 一种含噻二唑结构螯合硼离子液体及其应用 - Google Patents
一种含噻二唑结构螯合硼离子液体及其应用 Download PDFInfo
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- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
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Abstract
本发明提供一种含噻二唑结构螯合硼离子液体,所述的离子液体是以胆碱为阳离子,以噻二唑甘油螯合硼酸酯为阴离子制备的。所述的阴离子噻二唑甘油螯合硼酸酯是将2,5‑二巯基‑1,3,4‑噻二唑与甘油反应,然后再与硼酸反应制备而成的。发明还提供所述的含噻二唑结构螯合硼离子液体的应用,是将该离子液体溶于聚乙二醇基础油中制成润滑剂组合物。本发明提供含噻二唑结构螯合硼离子液体,含该离子液体的聚乙二醇润滑剂组合物具有良好的抗腐蚀性能和良好的抗磨性能、减摩性能。
Description
技术领域
本发明属于润滑剂技术领域,具体涉及一种含噻二唑结构螯合硼离子液体及其应用。
技术背景
全球范围内摩擦引起的能源消耗和燃料消耗依然是一个十分严重问题,从而促进了优异摩擦学改进剂的不断研究。离子液体(ILs)在2001年被作为合成润滑剂进行了探索,从那时起,在润滑化学的应用和基础研究方面取得了很大进展。最近,有关螯合硼阴离子基离子液体作为润滑添加剂的研究引起了科研人员的兴趣。孙俪文等(孙俪文,张云潇,蔡涛,商旺吉,刘丹,童丁毅,刘升高.烷基咪唑螯合硼离子液体的合成及摩擦学性能.2017,12)以1种环境友好的双水杨酸螯合硼为阴离子中心,以咪唑环为阳离子骨架,合成了7种新的具有不同烷基直链的螯合硼离子液体,将其应用于聚乙二醇200基础油中可提高其抗磨性能。张云潇等(张云潇,商旺吉,孙俪文,刘丹,童丁毅,刘升高.咪唑螯合硼离子液体的合成、表征及摩擦学性能.2017,04)以一类环境友好的螯合硼离子液体为研究对象,合成了4种具有不同烷基直链阳离子中心的螯合硼离子液体,将其应用于聚乙二醇200基础油中可有效降低摩擦系数与磨损体积。Zhang等通过将聚异丁烯琥珀酸酐引入到环境友好螯合硼阴离子基离子液体的咪唑阳离子相结合制备了油溶性离子液体。合成的PIBIL离子液体与传统抗磨剂ZDDP之间形成协同润滑效应((Yunxiao Zhang et,al.Environmental friendlypolyisobutylene-based ionic liquid containing chelated orthoborate aslubricant additive:Synthesis,tribological properties and synergisticinteractions with ZDDP in hydrocarbon oils.Tribology International 115(2017)297–306))。
尽管离子液体作为润滑添加剂或润滑剂已经取得了相对较好的减摩抗磨效果,但是其在应用于润滑添加剂的过程中仍然表现出一些问题,如制备成本高、抗氧化性能较差、承载能力低等。因此,利用离子液体的结构可设计、性能可调的特点,在骨架中引入特定功能性基团是一种解决离子液体在应用过程中各种问题的有效途径。
发明内容
本发明的目的在于提供一种含噻二唑结构螯合硼离子液体及其应用,从而弥补现有技术的不足。
本发明首先提供一种含噻二唑结构螯合硼离子液体,所述的离子液体是以胆碱为阳离子,以噻二唑甘油螯合硼酸酯为阴离子制备的,其中阴离子的化学结构式如式(1)所示,
作为一种优选的实施方案,所述的阴离子噻二唑甘油螯合硼酸酯是将2,5-二巯基-1,3,4-噻二唑与甘油反应,然后再与硼酸反应制备而成的;
所述的含噻二唑结构螯合硼离子液体的制备方法,包括如下步骤:
1)将2,5-二巯基-1,3,4-噻二唑与水按照质量比1:2混合,然后加入丙三醇,2,5-二巯基-1,3,4-噻二唑与丙三醇的摩尔比为1:2,在100℃条件下,搅拌反应12h;
2)向步骤1)中加入硼酸,其中2,5-二巯基-1,3,4-噻二唑与硼酸的摩尔比为2:1,在140℃条件下搅拌反应4-6h;
3)向步骤2)中加入氢氧化胆碱水溶液,2,5-二巯基-1,3,4-噻二唑与氢氧化胆碱的摩尔比为2:1,在120℃条件下搅拌反应制成。
本发明还提供所述的含噻二唑结构螯合硼离子液体的应用,是将该离子液体溶于聚乙二醇基础油中制成润滑剂组合物;
作为实施例的一种具体记载,所述的组合物中含噻二唑结构螯合硼离子液体的质量百分比浓度wt.%为1-5%;聚乙二醇200基础油用量是95-99%。
作为一种优选的实施方案,所述的聚乙二醇基础油为聚乙二醇200、聚乙二醇400中的一种。
本发明提供含噻二唑结构螯合硼离子液体,含该离子液体的聚乙二醇润滑剂组合物具有良好的抗腐蚀性能和良好的抗磨性能、一定的减摩性能。
附图说明
图1为聚乙二醇200基础油、含噻二唑结构螯合硼离子液体用量分别为1wt.%、3wt.%、5wt.%的聚乙二醇200润滑剂组合物的摩擦系数曲线图。
图2为聚乙二醇200基础油、含噻二唑结构螯合硼离子液体用量分别为1wt.%、3wt.%、5wt.%的聚乙二醇200润滑剂组合物的磨损体积图表。
具体实施方式
下面通过具体的实施例对本发明做进一步的阐述和说明,其在于进一步描述而非限制本发明。
实施例1
在100ml烧杯中,将7.5g的2,5-二巯基-1,3,4-噻二唑溶于15g热水,然后加入9.21g的丙三醇,在100℃条件下,搅拌反应12h,然后加入1.545g的硼酸,升温至140℃继续搅拌反应4h。
接着加入13.17g的质量浓度为46wt.%的氢氧化胆碱水溶液,在120℃条件下搅拌反应3h,反应结束后即得含噻二唑结构螯合硼离子液体[CHO][DMTD-Gl-B]。
将0.5g离子液体加入49.5g的聚乙二醇200基础油中,在80℃条件下,搅拌15min,即可获得红色的1wt.%含噻二唑结构螯合硼离子液体的聚乙二醇200润滑剂组合物,记作PEG200+1wt.%[CHO][DMTD-Gl-B]。
实施例2
在100ml烧杯中,将7.5g的2,5-二巯基-1,3,4-噻二唑溶于15g热水,然后加入9.21g的丙三醇,在100℃条件下,搅拌反应12h,然后加入1.545g的硼酸,升温至140℃继续搅拌反6h。接着加入13.17g的质量浓度为46wt.%的氢氧化胆碱水溶液,在120℃条件下搅拌反应3h,反应结束后即得含噻二唑结构螯合硼离子液体[CHO][DMTD-Gl-B]。
将1.5g离子液体加入48.5g的聚乙二醇200基础油中,在80℃条件下,搅拌15min,即可获得棕色的3wt.%含噻二唑结构螯合硼离子液体的聚乙二醇200润滑剂组合物,记作PEG200+3wt.%[CHO][DMTD-Gl-B]。
实施例3
在100ml烧杯中,将7.5g的2,5-二巯基-1,3,4-噻二唑溶于15g热水,然后加入9.21g的丙三醇,在100℃条件下,搅拌反应12h,然后加入1.545g的硼酸,升温至140℃继续搅拌反5h。接着加入13.17g的质量浓度为46wt.%的氢氧化胆碱水溶液,在120℃条件下搅拌反应3h,反应结束后即得含噻二唑结构螯合硼离子液体[CHO][DMTD-Gl-B]。
将0.5g制备的离子液体加入49.5g的聚乙二醇400基础油中,在80℃条件下,搅拌15min,即可获得红色的1wt.%含噻二唑结构螯合硼离子液体的聚乙二醇400润滑剂组合物,记作PEG400+1wt.%[CHO][DMTD-Gl-B]。
实施例4
在100ml烧杯中,将7.5g的2,5-二巯基-1,3,4-噻二唑溶于15g热水,然后加入9.21g的丙三醇,在100℃条件下,搅拌反应12h,然后加入1.545g的硼酸,升温至140℃继续搅拌反4h。接着加入13.17g的质量浓度为46wt.%的氢氧化胆碱水溶液,在120℃条件下搅拌反应3h,反应结束后即得含噻二唑结构螯合硼离子液体[CHO][DMTD-Gl-B]。
将1.5g制备的离子液体加入48.5g的聚乙二醇400基础油中,在80℃条件下,搅拌15min,即可获得棕色的3wt.%含噻二唑结构螯合硼离子液体的聚乙二醇400润滑剂组合物,记作PEG400+3wt.%[CHO][DMTD-Gl-B]。
实施例5
在100ml烧杯中,将7.5g的2,5-二巯基-1,3,4-噻二唑溶于15g热水,然后加入9.21g的丙三醇,在100℃条件下,搅拌反应12h,然后加入1.545g的硼酸,升温至140℃继续搅拌反5h。接着加入13.17g的质量浓度为46wt.%的氢氧化胆碱水溶液,在120℃条件下搅拌反应3h,反应结束后即得含噻二唑结构螯合硼离子液体[CHO][DMTD-Gl-B]。
将2.5g制备的离子液体加入47.5g的聚乙二醇200基础油中,在80℃条件下,搅拌15min,即可获得深棕色的5wt.%含噻二唑结构螯合硼离子液体的聚乙二醇200润滑剂组合物,记作PEG200+5wt.%[CHO][DMTD-Gl-B]。
本发明制备的含噻二唑结构螯合硼离子液体的聚乙二醇200润滑剂组合物具有良好的抗腐蚀性能,其具体测试方案由如下方法完成。
按照国标GB/T 5096-2017《石油产品铜片腐蚀试验法》,测试了含噻二唑结构螯合硼离子液体的聚乙二醇润滑剂组合物的抗腐蚀性能。其含噻二唑结构螯合硼离子液体的用量分别为1wt.%、3wt.%、5wt.%,分别对应实施例1、实施例2、实施例5制备的润滑剂组合物。
将打磨光亮的三个标准尺寸的铜片依次放入上述三种30ml润滑油组合物中,然后置于100℃浴中测试3h,然后取出铜片清洗干净,并与比色卡对比。试验结果为,含噻二唑结构螯合硼离子液体的用量分别为1wt.%的润滑油组合物铜片腐蚀程度为1a,含噻二唑结构螯合硼离子液体的用量分别为3wt.%的润滑油组合物铜片腐蚀程度为1b,含噻二唑结构螯合硼离子液体的用量分别为5wt.%的润滑油组合物铜片腐蚀程度未为1b。试验结果表明,含该离子液体的聚乙二醇润滑剂组合物具有良好的抗腐蚀性能。
本发明制备的含噻二唑结构螯合硼离子液体的聚乙二醇200润滑剂组合物具有良好的摩擦学性能,其具体测试方案如下:
使用德国Optimol油脂公司的SRV-IV微动摩擦磨损试验机,在温度为25℃,频率为25Hz,振幅为1mm,载荷为100N,时间为30min的条件下考察了含噻二唑结构螯合硼离子液体的聚乙二醇润滑剂组合物的减摩抗磨性能,并与聚乙二醇基础油进行对比。对三组润滑剂组合物进行了测试,其含噻二唑结构螯合硼离子液体的用量分别为1wt.%、3wt.%、5wt.%,分别对应实施例1、实施例2、实施例5。
试验所用钢球为直径10mm的GCr15轴承钢,下试样所用块体为直径24mm、高7.9±0.1mm的GCr15钢块,结果参见图1和表1。摩擦学实验结果表明,不同含量的[CHO][DMTD-Gl-B]离子液体均能在润滑初期提供较优的减摩效果,但是后期摩擦系数会逐渐升高,当[CHO][DMTD-Gl-B]离子液体为1wt.%时,表现出最优的减摩效果。
表1:聚乙二醇200基础油、含噻二唑结构螯合硼离子液体用量分别为1wt.%、3wt.%、5wt.%的聚乙二醇200润滑剂组合物的平均摩擦系数
摩擦实验结束后,采用MicroXAM公司的非接触式三维表面轮廓仪测试下试样块体的磨损体积,结果参见图2。摩擦学实验结果表明,不同含量的[CHO][DMTD-Gl-B]离子液体均能有效的降低基础油PEG200的磨损体积,随着[CHO][DMTD-Gl-B]离子液体含量的增加,硫含量的增加,抗磨效果逐渐减弱,当[CHO][DMTD-Gl-B]离子液体为1%时,表现出最优的抗磨效果,磨损体积最小。
Claims (7)
2.如权利要求1所述的含噻二唑结构螯合硼离子液体,其特征在于,所述的阴离子噻二唑甘油螯合硼酸酯是将2,5-二巯基-1,3,4-噻二唑与甘油反应,然后再与硼酸反应制备而成的。
3.权利要求1或2所述的含噻二唑结构螯合硼离子液体的制备方法,其特征在于,所述的方法包括如下步骤:
1)将2,5-二巯基-1,3,4-噻二唑与水按照质量比1:2混合,然后加入丙三醇,2,5-二巯基-1,3,4-噻二唑与丙三醇的摩尔比为1:2,在100℃条件下,搅拌反应12h;
2)向步骤1)中加入硼酸,其中2,5-二巯基-1,3,4-噻二唑与硼酸的摩尔比为2:1,在140℃条件下搅拌反应4-6h;
3)向步骤2)中加入氢氧化胆碱水溶液,2,5-二巯基-1,3,4-噻二唑与氢氧化胆碱的摩尔比为2:1,在120℃条件下搅拌反应制成。
4.权利要求1或2所述的含噻二唑结构螯合硼离子液体在制备润滑制品中的应用。
5.一种润滑剂组合物,其特征在于,所述的润滑剂组合物是将权利要求1或2所述的含噻二唑结构螯合硼离子液体溶于聚乙二醇基础油中制成的。
6.如权利要求5所述的润滑剂组合物,其特征在于,所述的组合物中含噻二唑结构螯合硼离子液体的质量百分比浓度为1-5%;聚乙二醇200基础油用量是95-99%。
7.如权利要求5或6所述的润滑剂组合物,其特征在于,所述的聚乙二醇基础油为聚乙二醇200、聚乙二醇400中的一种。
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