硅烷偶联剂改性空心SiO2纳米球对纯丙乳液性能的影响研究
您当前的位置 : 首页 > 产品中心 > 氯硅烷

硅烷偶联剂改性空心SiO2纳米球对纯丙乳液性能的影响研究

2025-02-14 19:10:58 氯硅烷
产品详情:

  北京化工大学硕士论文北京化工大学位论文原创性声明本人郑重声明:所呈交的学位论文,是本人在导师的指导下,独立进行研究工作所取得的成果。除文中已经注明引用的内容外,本论文不含任何其他个人或集体已经发表或撰写过的作品成果。对本文的研究做出重要贡献的个人和集体,均已在文中以明确方式标明。本人完全意识到本声明的法律结果由本人承担。作者签名:猫受日期:狸!;!≤:≥垒关于论文使用授权的说明学位论文作者完全了解北京化工大学有关保留和使用学位论文的规定,即:研究生在校攻读学位期间论文工作的知识产权单位属北京化工大学。学校有权保留并向国家相关部门或机构送交论文的复印件和磁盘,允许学位论文被查阅和借阅;学校可以公布学位论文的全部或部分内容,可以允许采取影印、缩印或其它复制手段保存、汇编学位论文。保密论文注释:本学位论文属于保密范围,在鱼年解密后适用本授权书。非保密论文注释:本学位论文不属于保密范围,适用本授权书。作者签名:导师签名:日期:翌!!:』:!全日期:j边纽—L

  北京化工大学硕士论文学位论文数据集中图分类号TQ630.4学科分类号150.55论文编号84密级公开学位授予单位代码10010学位授予公司名称北京化工大学作者姓名**学号2010001184获学位专业名称硕士获学位专业代码081704课题来源非立项研究方向工业催化论文题目硅烷偶联剂改性空心SiO:纳米球对纯丙乳液性能的影响研究关键词SiO:,纳米微球,空心纳米球,硅烷偶联剂,纯丙乳液。论文答辩日期2013.5.24宰论文类型应用研究学位论文评阅及答辩委员会情况姓名职称工作单位学科专长指导教师李保山教授北京化工大学应用化学评阅人1刘建军副教授北京化工大学应用化学评阅人2郭灿雄副教授北京化工大学分析化学评阕人3评阅人4评阕人5椭员糊孙晓明教授北京化工大学理学院应用化学答辩委员1宋字飞教授北京化工大学理学院应用化学答辩委员2李增和副教授北京化工大学理学院应用化学答辩委员3汪中明副教授北京化工大学理学院无机化学答辩委员4李亚平副教授北京化工大学理学院物理化学答辩委员5汪:一.四.论文类型:1.基础研究2.应用研究3.开发研究4.其它中图分类号在((中国图书资料分类法》查询。学科分类号在中华人民共和国国家标准(cs/r13745-9)《学科分类与代码》中查询。论文编号由单位代码和年份及学号的后四位组成。

  北京化工大学硕士论文硅烷偶联剂改性空心Si02纳米球对纯丙乳液性能的影响研究摘要在国内外,关于纯丙乳液的研究已有一段时间,但是与硅丙乳液相比,纯丙乳液的耐候性较差,材料较易磨损,因此其应用受到了限制。无机物大多具有硬度大、耐磨损、绝热等特点,因而作为结构材料颇受青睐。但是,相较有机物而言,无机物加工成型难且韧性偏差。两者的复合将使新材料兼具无机物和有机物的优点。空心纳微粒子一般为球形空心结构,质量较轻,具备比较好的流动性、较强的填充能力。在有机材料中添加无机空心纳微粒子,不但可以减小材料的密度,使材料易于加工;而且,当材料受力时,空心纳微粒子能吸收能量,使材料不可能会出现破坏性裂纹。与此同时,空心纳微粒子的球形结构更加有助于将外界的压力均匀地传递给基体,可使材料的韧性、强度提高。因而,采用空心Si02纳米球改性纯丙乳液,可望提高纯丙乳液的附着力、耐候性以及耐磨损性,而且赋予乳液更优良的流动性、强度和韧性。但由于空心Si02微球的粒径比较小,比表面积及表面能大,因而易于发生吸附,产生团聚现象,不能很好地分散在纯丙乳液中。因此,对其进行表面改性具备极其重大的意义。本论文首先将空心Si02纳米球用硅烷偶联剂改性,使空心Si02纳米球表面键合上有机官能团,便于与纯丙乳液发生偶联,再将其引入到纯丙乳液中,提高了纯丙乳液的附着力及耐候性。论文主要研究成果:(1)分别使用硅烷偶联剂A.172、KH570改性空心Si02纳米球,并使用多种表征方法,综合评定了改性后的空心Si02纳米球的结构及性质。测试分析结果为:硅烷偶联剂A.172、KH570均成功地对空心Si02纳米球进行了表面改性,改性后的空心Si02纳米球表面连有富含碳碳双键的活性基团,其在有机溶剂中的分散性显著地增强,且并未破坏其形貌结构。

  北京化工大学硕士论文(2)采用种子乳液聚合工艺,将改性后的空心Si02纳米球与有机物复合制备出改性纯丙乳液。探讨各影响因素对聚合反应的影响,确定了最佳反应条件。并探讨硅烷偶联剂改性空心Si02纳米球对纯丙乳液性能的影响,对比使用空心Si02纳米球改性前、后纯丙乳液的热重分析,能够准确的看出改性后的纯丙乳液的热分解温度为326℃,比原纯丙乳液提高了22℃,说明了空心Si02纳米球改性的纯丙乳液的耐热性有所提高;对比改性前、后的纯丙乳液紫外分析,能够准确的看出改性后的纯丙乳液的对紫外光有更强的吸收作用,减弱了紫外光对原材料的照射,对原材料起到了更好的保护作用;对比改性前、后的纯丙乳液的附着力测试,能够准确的看出,改性后的乳液的附着力有明显的提高。总之,空心Si02纳米球改性后的纯丙乳液具有更优异的耐热性、更好的附着力以及对原材料更好地保护作用。关键词:Si02,纳米微球,空心纳米球,硅烷偶联剂,纯丙乳液。

  SILICAHoLLOWNANOSPHERESMODIFIEDWITHSILANECOUPLINGAGENTANDTHEIRINFLUENCEPROPERTYABSTRACTPureacrylicemulsionhasbeenstudiedathomeandabroad.However,comparedwiththeacrylicsiliconeemulsion,weatherresistantandstickinessofpureacrylicemulsionarepoorerandthereforeltsapplicationhasbeenlimited.InorganiciSpopularasstructuralmaterial,becauseitsperformanceiSexcellent,suchas:hardness,wearresistantandthermalisolation.butitstoughnessiSpoorerthanorganicandmoldingprocesslsdifficult.Soorganic.inorganiccompositescombinestheadvantagesofinorganicandorganic.111ehollownanoparticlesarespherical,lightweight,goodmobility, and strong ability to fill.Material modified by inorganic hollow nanoparticles has reduced density and iS easy to be processed.Further, hollow nanoparticles Can produce alarge number of small crazing,not destructive crack.Moreover the spherical structure of the hollow nanoparticles iS also conducive to uniformly transmitting the outside pressure SO that the toughness and strength of the material is increased. Pure acrylic emulsion modified by inorganic nanoparticles combines the properties of inorganic nanoparticles and organic polymer and it has improved adhesive force,weather resistance,toughness and strength of pure acrylic emulsion.Because of their small particle diameter and big specific surface areaSi02 hollow nanospheres will necessarily agglomerate,and can not be well dispersed in the pure acrylic emulsion. So,firstly,Si02 hollow nanospheres are surface-modified,making them 3

  北京化工大学硕士论文 easy to disperse. ・In this work,Si02 hollow nanospheres modified with silane coupling agent have been prepared,and the results showed that such method is an effective strategy to enhance the hydrophobic ability and to avoid agglomeration due to the enrichment of C=C bonds upon modified with silane coupling agent.ne obtained Si02/silane coupling agent hollow nanospheres were then introduced into the pure acrylic emulsion system to study their influence on the properties of the emulsion. 111e main research results are as following: 1.Si02 hollow nanospheres were modified with silane coupling agent A一1 72 and KH570 and assessed the structure and properties using avariety of characterization methods.Analysis showed that Si02 hollow nanospheres were successfully modified with silane coupling agent A-1 72 and KH570 and Si02/silane coupling agent hollow nanospheres would not agglomerate in organic solvent due to the enrichment of C=C bonds.Furthermore,theirs main structure were remain the same. 2.The obtained Si02/silane coupling agent hollow nanospheres were then introduced into the pure acrylic emulsion system using seeded emulsion polymerization process.ne impact of various factors on the polymerization were explored to determine the optimal reaction conditions.Then we studied their influence on the properties of the emulsion.The result of TG analysis showed that the thermal decomposition temperature of the acrylic emulsion modified by hollow silica nanospheres was 326℃,which was 22℃higher than the original acrylic emulsion.This indicated that thermal stability of the hollow silica nanospheres modified acrylic emulsion had been improved.The result of UV analysis showed that modified acrylic emulsion existed stronger UV absorption than the original emulsion.Modified acrylic emulsion weakened UV irradiation to raw materials,and played agood protection to raw materials.And the result of adhesion test showed that the modified acrylic emulsion adhesion had been significantly improved.In short,the hollow silica nanospheres modified acrylic 4

  北京化工大学硕士论文 emulsion had more excellent thermal stability,beRer adhesion and better protection to raw materials than the original acrylic emulsion. KEY WORDS:Si02,nanospheres,hollow nanospheres, silane coupling agent,pure acrylic emulsion 5

  北京化工大学硕士论文 目录 第一章绪论………………………………………………………………。1 1.1前言………………………………………………………………………………………….1 1.2纯丙乳液改性………………………………………………………………………..1 1.2.1引入微量功能单体…………………………………………………………2 1.2.2改变引发体系………………………………………………………………………2 1.2.3改变乳化剂…………………………………………………………………2 1.2.4添加纳米材料……………………………………………………………………3 1.3空心纳米球改性……………………………………………………………4 1.3.1表面包覆处理…………………………………………………………………5 1.3.2表面接枝处理……………………………………………………………………6 1.3.3高能处理法…………………………………………………………………………8 1.4有机/无机纳米复合材料……………………………………………………8 1.4.1有机/无机纳米复合材料的制备方法………………………………………8 1.4.2有机/无机纳米复合材料的性能…………………………………………l l1.4.3有机/无机纳米复合材料的应用………………………………………….13 1.5论文的目的、意义及研究内容………………………………………………14 1.5.1论文的目的及意义……………………………………………...………j…………一14 1.5.2论文的研究内容……………………………………………………………………….15 第二章实验部分………………………………………………………1 72.1仪器和试剂……………………………………………………………………17 2.1.1实验仪器……………………………………………………………………一17 2.1.2实验试剂…………………………………………………………………17 2.2实验方法……………………………………………………………………..1 82.2.1空心Si02纳米球的改性……………………………………………………………18 2.2.1.1空心Si02纳米球的A.172改性……………………………………....…………18 2.2.1.2空心Si02纳米球的KH570改性………………………………………………19 2.2.2改性空心Si02纳米球改性纯丙乳液…………………………………….19 2.3样品的表征………………………………………………………………………22 2.3.1改性前、后Si02纳米球的分析表征……………………………………..22 2.3.2使用空心Si02纳米球改性前、后的纯丙乳液分析与表征………………一23 第三章空心Si02纳米球的改性……………………………………27 3.1引言…………………………………………………………………………………………27 3.2硅烷偶联剂A.172改性空心Si02纳米球………………………………….28 3.2.1硅烷偶联剂A.172改性空心Si02纳米球的反应条件考察………………28 3.2.2硅烷偶联剂A.172改性的空心Si02纳米球的表征………………………30 3.2.3硅烷偶联剂A.172改性的空心Si02纳米球的的机理探讨………………32

  北京化工大学硕士论文 3.3硅烷偶联剂KH570改性空心Si02纳米球…………………………………33 33.1硅烷偶联剂KH570改性空心Si02纳米球的反应条件考察………………33 3.3.2硅烷偶联剂KH570改性的空心Si02纳米球的表征……………………一35 3.3.3硅烷偶联剂KH570改性的空心Si02纳米球的的机理探讨………………….37 3.4本章小结………………………………………………………………………………38 第四章空心Si02纳米球改性纯丙乳液的制备及表征…….39 4.1引言………………………………………………………………………………………..39 4.2空心Si02纳米球改性纯丙乳液的反应条件考察……………………………39 4.2.1单体等试剂滴加速度对纯丙乳液改性的影响……………………………39 4.2.2不同反应温度对纯丙乳液改性的影响……………………………_……一40 4.2.3软、硬单体的不同配比对纯丙乳液性能的影响…………………………4l 4.2.4甲基丙烯酸用量对纯丙乳液性能的影响…………………………………42 4.2.5乳化剂配比及用量对纯丙乳液性能的影响………………………………43 4.2.6引发剂的用量对纯丙乳液性能的影响……………………………………45 4.2.7不同硅烷偶联剂改性空心Si02纳米球对纯丙乳液改性的影响………….46 4.2.8空心Si02纳米球的用量对纯丙乳液性能的影响…………………………48 4.3空心Si02纳米球改性纯丙乳液的表征分析………………………………一49 4.3.1空心Si02纳米球改性纯丙乳液的FT-IR表征分析……………………….49 4.3.2空心Si02纳米球改性纯丙乳液的热重分析………………………………50 4.3.3空心Si02纳米球改性纯丙乳液的紫外表征分析…………………………50 4.3.4改性乳液的附着力测定………………………………………………………5l 4.3.5空心Si02纳米球改性纯丙乳液的性能分析………………………………5l 4.4本章小结…………………………………………………………………………52 第五章结论…………………………………………………………………53 附录1。…。..…………………。。…………….………………….……………55 附录2……………………………………………………………………………63 参考文献…………………………………‰………………………….75 致谢…………………..……………………………………………….……….83 研究成果及发表的学术论文…………………………………………85 作者和导师简介……………………………………………………….87

  北京化工大学硕士论文 Contents Chapter IGeneral Introduction...........................................I 1.1 Introduction……………………………………………………………………………………………………………..1 1.2 The modification of pure acrylic emulsion…………………………………………….1 1.2.1 The introduction of micro-functional monomer…………………………………….2 1.2.2 Changing initiator system……………………………………………………………………………………2 1.2.3 Changing the emulsifying agent…………………………………………………………………………2 1.2.4 The introduction of nanomaterials………………………………………………………………………3 1.3 The modification ofhollow nanospheres………………………………………………4 1.3.1 Surface coating……………………………………………………………………………………………………5 1.3.2 Surface grafting…………………………………………………………………………………………………..6 1.3.3 High-energy processing………………………………………………………………………………………8 1.4 Organic.inorganic nanocomposites………………………………………………………………………8 1.4.1 Synthesis method of organic-inorganic nanocomposites………………………………。8 ’1.4.2 The properties of organic-inorganic nanocomposites…………………………….1 11.4.3 Application oforganic—inorganic nanocomposites………………………………………….・ 13 1.5 Significance and main content ofthe research…………………………………………………。14 1.5.1 Significance and target………………………………………………………………………………………14 1.5.2 Main content……………………………………………………………………………………………………..1 5Chapter 2.Experimental......................................................17 2.1 Instruments and chemical reagents………………………………………………………………………..17 2.1.1 Main instruments………………………………………………………………………………………………..17 2.1.2 Main reagents……………………………………………………………………………………………………~17 2.2 Experimental…………………………………………………………………………………………………………1 82.2.1 Si02 hollow nanospheres modifled with silane coupling agent…………………。1 82.2.1.1 Si02 hollownanospheres modified withA-172…………………………………..18 2.2.1.2 Si02 hollow nanospheres modified with KH570………………………………19 2.2.2 Pure acrylic emulsion modified with Si02 hollow nanospheres……………………19 2.3 Characteration Techniques………………………………………………………………………………….22 2.3.1 Charactcration Techniques of the hollow Si02 nanospheres and modifled by silane coupling agent…………………………………………………………………………………………22 2.3.2 Characteration Techniques of the pure acrylic emulsion and modified by Si02 nanospheres……………………………………………………………………………………………………….23 Chapter 3Si02 hollow nanospheres modified with silane coupling agent...................................................27 3.1 Introduction……………………………………………………………………………………………………………27 3.2 Si02hollow nanospheres modified withA一172…………………………………………………….28 l¨