纳米材料在润滑油中的分散性和稳定性

主要论述了目前解决纳米材料在润滑油中的分散性和稳定性的方法。     

纳米材料催化剂的制备及应用

综述了纳米材料的种类、性能和制备技术；介绍了纳米材料用作催化剂或载体的优异性能以及各种纳米材料催化剂应用的研究概况。     

改性沥青机理及应用

系统地论述了改性沥青的机理及影响改性沥青效果的因素，并对改性沥青今后的发展提出见解。     

石油分散体系的稳定性因子与其蒸馏收率的关系

通过对石油分散体系的聚集稳定性因子和蒸馏收率的测定，发现不同石油分散体系的聚集稳定性因子与其蒸馏收率之间有着密切的关系，根据石油分散体系的聚集稳定性因子的变化趋势可以预测体系蒸馏收率的变化。     

聚合物改性沥青的相容性及稳定性

对于聚合物改性沥青来讲，沥青与聚合物的相容性及改性沥青的贮存稳定性是首先要解决的问题。这对于改性沥青的运输及使用都有性能保证。该研究从基础沥青的性质，改性沥青的高温性能，低温延度等方面探讨了聚合物ＳＢＳ改性沥青的机理，制备工艺，表征制备聚合物改性沥青在物理分散的同时必须加入化学改性，才能得到贮存稳定性良好的改性沥青。     

无机纳米材料在高分子中的应用

介绍了无机纳米粒子及纳米材料对聚合物的改性,展望了纳米材料的应用前景。     

分散体系的沉积稳定性

从理论上论述了用于油井堵水的分散体系在模拟矿场条件下的沉积稳定性。研究结果表明，在悬浮颗粒直径、浓度的一定范围内，这种分散体系不会产生沉积，可满足现场施工的要求。     

橡胶改性乳化沥青的稳定机理

乳化沥青和橡胶胶乳为乳化分散体系。制备改性乳化沥青时，将二者混合，在强烈的机械力作用下，各自原来的平衡被打破。在二者的混合体系中，沥青微粒（A）和橡胶胶乳微粒（R）受到机械力的作用后，某些微粒的界面膜发生破裂，A与R粒子相互碰撞，由于其之间有良好的相容性和亲和性，于是互相吸附、扩散、渗透、     

纳米改性沥青研究进展

纳米材料改性沥青是道路材料研究中的热点和前沿课题。对纳米改性沥青的研究现状进行了总结,分析比较了纳米材料对沥青的改性效果和作用机理,并对纳米改性沥青的制备工艺进行了阐述。纳米改性沥青优势和挑战并存,最后对纳米改性沥青的研究前景进行了展望。     

油溶性氢氧化镧/氧化石墨烯纳米复合物的制备、分散和摩擦学性能

Lanthanum hydroxide/graphene oxide nanocomposites(La(OH)_3/GO) modified by octadecylamine(OCA), oleylamine(OLA), and polyvinylpyrrolidone(PVP) were prepared, respectively, as the base oil additives. The dispersion stability of different modified La(OH)_3/GO in base oil was studied by means of centrifugation. The tribological properties of oleophilic La(OH)_3/GO in base oil were investigated using an UMT ball-disc tribometer. The micro-morphology and chemical composition of the worn surface were characterized by 3 D laser microscope, SEM, EDS, XPS, and Raman spectroscopy, respectively. The wettability performance of the worn surface was also studied based on the contact angle measurements. The test results showed that the OLA-La(OH)_3/GO nanocomposites had good dispersion stability in base oil. The anti-wear performance of base oil was improved significantly by the addition of OLA-La(OH)_3/GO nanocomposites. The characterizations of worn surface showed that the OLA-La(OH)_3/GO nanocomposites could form the metal oxide and graphene protective films effectively on the friction interface and thus increased the oil wettability of the worn surface, thereby resulting in an improved wear resistance.     

反应性SBS改性沥青的研制

以泰州中海沥青为原料，SBS为改性剂，通过加入少量增容剂、偶联剂，采用物理分散、化学改 性的方法研制出反应性SBS改性沥青。反应性SBS必性沥青符合我国JTJ036－1998标准，SBS加入量仅为4％即可达到软化点81．5℃、弹性恢复（25℃）95％以上的良好性能。反应性SBS必性沥青具有良好的热储存稳定性，长期高温储存（163℃，8天）未发生离析。利用荧光显微照相技术研究了反应性和非反应性SBS必性沥青微观结构，结果表明二者的微观结构存在显著差异。     

SBS改性沥青稳定机理的研究

通过加入相容剂和稳定剂来稳定SBS在沥青中的分散,制备贮存稳定性良好的SBS改性沥青,并探讨其稳定定理。研究表明,相容剂能够溶胀SBS的硬嵌段－－聚苯乙烯微区,有利于SBS在沥青中均匀分散,稳定剂能够引发SBS交联形成网络结构和沥青接枝到SBS上,稳定SBS在沥青中的分散,形成宏观均匀稳定的体系。     

反应型聚硅氧烷改性聚氨酯水分散体的合成及性能

采用N-[(1,1-二甲基-2-乙酰基)乙基]-β-二羟乙氨基丙酰胺(DDP)和双羟丙基封端聚硅氧烷(PDS)合成了反应型聚硅氧烷改性聚氨酯水分散体。测定了水分散体的黏度、表面张力、粒径、粒径分布及储存稳定性;观察了水分散体中粒子的聚集状态及胶膜断面的相分离形态;研究了水分散体成膜后胶膜的耐水和耐溶剂性能、凝胶含量、拉伸强度、断裂伸长率及热失重情况。实验结果表明,水分散体的黏度及表面张力随DDP含量的增加而增大,加入PDS后水分散体的黏度及表面张力减小;加入DDP和PDS均能提高胶膜的热稳定性;成膜时的交联反应及加入PDS显著提高了膜的耐水、耐溶剂性能和凝胶含量等性能,与聚氨酯水分散体相比,吸水率最大下降了45.83%,吸甲苯率最大下降了15.53%,凝胶质量分数最大增加了9.62%。     

改性石油沥青防腐蚀卷材系列产品的研制

防腐蚀热缠带是用改性石油沥青与玻璃纤维增强材料复合而成的一种管道外防腐蚀新材料,通过在城市燃气管线、自来水管线以及原油长输管线上的应用,已初步形成了能够适应不同输送条件、不同施工环境要求的系列产品。文章详细介绍了防腐蚀热缠带系列产品研制的过程,包括基本材料的选定、改性沥青配方的筛选、系列产品的主要性能及其作用范围等。     

溶剂型SBS改性沥青粘层材料的研制与应用

以SBS为主改性剂研制的溶剂型SBS改性沥青粘层材料,粘接强度达到0.3MPa,-15℃时绕10 mm圆棒涂膜无裂纹,为沥青路面坑槽修补提供了粘接强度高、低温柔性好及施工简单方便的粘层材料.     

制备储存稳定的LDPE/SBS共混物改性沥青

比较了直接添加LDPE、SBS改性沥青与LDPE／SBS熔融共混物改性沥青的高温储存稳定性，并利用光学显微镜观察了各种改性沥青在高温下随时间的变化，结果表明：直接添加LDPE，SBS所得到的改性沥青，其高温储存稳定性很差，在反应剂加入后得到了一定程度的改善，而采用预先制备LDPE／SBS共混物，再将其添加到沥青中，在反应剂存在的条件下，所得到的改性沥青能够在高温下稳定储存，同时，相形态观察也表明，直接添加改性沥青，无论加入反应剂与否，都存在聚合物颗粒聚集现象，而共混物改性沥青的高温相形态则不随时间变化，这一点与稳定性测试结果相吻合。     

Investigation and Improvement of Storage Stability of SBS Modified Asphalt

Three different types of storage stability of SBS modified asphalts were investigated by hot storage test. It's found that during hot storage the performance of SBS modified asphalt deteriorated although phase separation didn't happen. Mechanism of storage stability of SBS modified asphalt was discussed. The different hot storage stability of three SBS modified asphalts could be well interpreted with the interface layer principle. Based on the interface layer principle, a new way that asphalt was chemically modified by SBS was put forward to improve hot storage stability and other using performances. The results indicated that the asphalt chemically modified by SBS had good hot storage stability and other using performances were significantly improved. Fluorescence microscopy was used to study SBS modified asphalt phase morphology, and the SBS chemically modified asphalt showed two interlocked continuous phases.     

Investigation and Improvement of Storage Stability of SBS Modified Asphalt

Abstract

Three different types of storage stability of SBS modified asphalts were investigated by hot storage test. It's found that during hot storage the performance of SBS modified asphalt deteriorated although phase separation didn't happen. Mechanism of storage stability of SBS modified asphalt was discussed. The different hot storage stability of three SBS modified asphalts could be well interpreted with the interface layer principle. Based on the interface layer principle, a new way that asphalt was chemically modified by SBS was put forward to improve hot storage stability and other using performances. The results indicated that the asphalt chemically modified by SBS had good hot storage stability and other using performances were significantly improved. Fluorescence microscopy was used to study SBS modified asphalt phase morphology, and the SBS chemically modified asphalt showed two interlocked continuous phases.