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Influence of surgical suture properties on the tribological interactions with artificial skin by a capstan experiment approach

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Friction 2017年第1期5卷 87-98页

作者： tianhui ren Xiangqiong ZENG Emile VAN DER HEIDE School of Chemistry and Chemical Engineering Key Laboratory for Thin Film and Microfabrication of the Ministry of Education Shanghai Jiao Tong University Shanghai 200240 China Advanced Lubricating Materials Laboratory Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai 201210 ChinaLaboratory for Surface Technology and Tribology University of Twente Enschede 7500AE the Netherlands Laboratory for Surface Technology and Tribology University of Twente Enschede 7500AE the NetherlandsTU Delft Faculty of Civil Engineering and Geosciences Stevinweg 1 Delft 2628 CN the Netherlands

Tribological interactions between surgical suture and human tissue play an important role in the stitching *** purpose of the paper is to understanding the tribological behavior of surgical suture interacting with artificial skin,with respect to surgical suture material and structure,by means of a capstan experiment approach and a contact area *** results indicated that structure and surface topography of the surgical suture had a pronounced effect on the tribological *** apparent coefficient of friction of vicryl surgical suture was the smallest among the three surgical suture *** the sliding velocity increased,or the applied load decreased,the coefficient of friction ***,stick-slip phenomena were observed during the sliding procedure.

关键词： friction sliding surgical suture artificial skin capstan experiment

A potential approach to replace sulfurized olefins with borate ester containing xanthate group in lubricating oil

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Chinese Science Bulletin 2008年第7期53卷 992-997页

作者： WANG YongGang LI JiuSheng ren tianhui School of Chemistry and Chemical Engineering Shanghai Jiaotong University Shanghai 200240 China PetroChina Lanzhou Lubricating Oil R&D Institute Lanzhou 730060 China

To develop a potential substitute for sulfurized olefins, a borate ester derivative containing xanthate group (titled BXT) was synthesized and characterized. Meanwhile, its tribological properties in rape-seed oil were evaluated using four-ball tribometer. The results indicate that BXT shows excellent tri-bological capacity such as load-carrying, friction-reducing and antiwear property. Moreover, the syn-thesized compound has no noticeable odor, shows little corrosion to copper, and exhibits better ther-mal stability compared with sulfurized olefins. In order to study the action mechanism of BXT in friction process, analysis of the worn surface was carried out using a three-dimensional non-contact surface profilometer and XPS analyzer.

关键词：势能硫化作用烯烃硼酸盐酯黄原酸盐

Dopamine hydrochloride and carboxymethyl chitosan coatings for multifilament surgical suture and their influence on friction during sliding contact with skin substitute

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Friction 2020年第1期8卷 58-69页

作者： Gangqiang ZHANG Ganlin ZHENG tianhui ren Xiangqiong ZENG Emile van der HEIDE Advanced Lubricating Materials Laboratory Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201210China Institute of Functional Textiles and Advanced Materials Colloge of Textlies&ClothingQingdao UniversityQingdao 266000China School of Chemistry and Chemical Engineering Key Laboratory of Thin Film and Microfabrication Technology(Ministry of Education)Shanghai Jiao Tong UniversityShanghai 200240China Laboratory for Surface Technology and Tribology University of TwenteEnschede 7500AEThe Netherlands TU Delft Faculty of Civil Engineering and GeosciencesStevinweg 1Delft 2628 CNThe Netherlands Soete Laboratory Ghent UniversityZwijnaarde B-9052Belgiu

In order to reduce the damage to tissue and fill the interstices between fibers,multifilament sutures are frequently treated with certain coating *** objective of this study was to create and characterize dopamine hydrochloride(DA)and carboxymethyl chitosan(CMCS)coatings on surgical sutures and investigate their effects on the frictional performance of the surgical sutures during sliding through a skin *** effects of the treatment on the physical and chemical characteristics of the surgical sutures were *** friction force of the surgical sutures during sliding through the skin substitute was experimentally determined using a penetration friction *** coefficient of friction(COF)was calculated using a linear elastic model and was used to estimate the frictional behavior of the surgical suture‐skin *** results showed that the DA coating could evenly deposit on the surface of the etched multifilament surgical suture surfaces in a weakly alkaline buffer *** CMCS coating material could form a uniform film on the surface of the *** changes in the surface roughness of the multifilament surgical sutures with different treatments occurred in this *** friction force and the COF of the multifilament surgical sutures with DA and CMCS coating showed little change when compared with untreated multifilament surgical sutures.

关键词： friction surgical suture coating Biomaterials skin substitute

Tribological performance and chemistry of films for di-n-butyl dithiocarbamate derivatives in rapeseed oil

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Chinese Science Bulletin 2007年第2期52卷 194-199页

作者： WU Hua ZENG XiangQiong LU LingBo ren tianhui School of Chemistry and Chemical Engineering Shanghai Jiaotong University Shanghai China

Two di-n-butyl dithiocarbamate derivatives were easily synthesized. Their tribological performances as lubricating oil additives in rapeseed oil were evaluated using a four-ball machine, and their chemistry of films was analyzed with X-ray absorption near-edge spectroscopy (XANES). The results indicate that the two compounds possess excellent anti-wear property and good load-carrying capacity. According to the XANES results, for the thermal films, the outer surfaces are mainly composed of N, S-containing polymer and ferric sulfate, and the near-surface and the bulk are composed of ferrous sulfate, while for the anti-wear films, the outer surfaces are only composed of ferric sulfate, but the near-surface and the bulk are mainly composed of ferrous sulfate.

关键词：摩擦学薄膜化学属性衍生物二硫代氨基甲酸酯

Advances in the novel borate esters containing heterocycle as environmental friendly lubricant additives

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Advances in the novel borate esters containing heterocycle a...

聚甲基硅氧烷微球润滑油添加剂的制备与摩擦行为研究

中国化学会第九届全国有机化学学术会议

作者： Zhipeng Li tianhui ren School of Chemistry and Chemical Engineering Key Laboratory for Thin Film and Microfabrication of the Ministry of EducationShanghai Jiao Tong University

＜正＞Under the background of the global energy shortage and environmental protection as well as the rapid development of China economy,it is a great challenge to achieve a green,fast and healthy"GDP".The development of environmentally acceptable lubricant additives is one of the important research *** borate ester could be a promising candidate due to its excellent combination properties,such as anti-wear and friction-reducing abilities,low-toxicity and

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润滑与密封 2006年第8期31卷 38-41页

作者：辛忠杨阳任天辉华东理工大学化工学院上海200237 上海交通大学化工学院上海200240

采用水解-缩聚两步法以甲基三甲氧基硅烷为原料制备了粒径在0．5～10．0μm之间的聚甲基硅氧烷微球。以黄油脂为介质考察了聚甲基硅氧烷微球的添加量和尺寸对黄油脂减摩抗磨性能的影响，同时对其抗磨机制进行了探讨。结果表明：聚甲基... 详细信息

采用水解-缩聚两步法以甲基三甲氧基硅烷为原料制备了粒径在0．5～10．0μm之间的聚甲基硅氧烷微球。以黄油脂为介质考察了聚甲基硅氧烷微球的添加量和尺寸对黄油脂减摩抗磨性能的影响，同时对其抗磨机制进行了探讨。结果表明：聚甲基硅氧烷微球的添加量和尺寸对黄油脂减摩抗磨性能有显著的影响，添加聚硅氧烷微球的润滑油的减摩和抗磨性能比未添加提高20％以上；聚甲基硅氧烷微球的减摩抗磨机制是由于微球表面含有大量的羟基，可以与钢球表面发生摩擦化学反应生成Fe2O3，沉积在钢球表面形成保护膜，同时羟基在摩擦副间形成吸附薄膜，保护了钢球表面，提高了润滑脂的耐磨性。

关键词：聚甲基硅氧烷微球摩擦行为润滑油添加剂

苯酚类、苯胺类和硫醚类抗氧剂对动物性油脂的氧化防护效果与评价

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润滑与密封 2016年第2期41卷 8-13页

作者：李果莉任天辉上海交通大学化学化工学院上海200240 奎克化学(中国)有限公司上海201712

为评价常用抗氧剂在金属加工用油产品中的抗氧化效果,选取动物性油脂(精炼猪油)为基础油,运用热重分析法(TGA)和高压差示扫描量热法(PDSC),并结合老化实验,分别考察3类共4种抗氧剂在不同温度下对该基础油的氧化防护效果。实验结果表明,... 详细信息

为评价常用抗氧剂在金属加工用油产品中的抗氧化效果,选取动物性油脂(精炼猪油)为基础油,运用热重分析法(TGA)和高压差示扫描量热法(PDSC),并结合老化实验,分别考察3类共4种抗氧剂在不同温度下对该基础油的氧化防护效果。实验结果表明,抗氧剂能够有效防止油品氧化,但不同类型抗氧剂的抗氧化效果存在明显的差异;较低温度下,苯酚类抗氧剂优于苯胺类和硫醚类抗氧剂,而硫醚类抗氧剂在高温下的氧化防护性能更优异;为有效地保护油品,在实际应用中,需要将不同类型的抗氧剂进行复配,取长补短,以适应更广泛的工况条件。

关键词：动物性油脂抗氧剂氧化温度

新型S-N型三取代三嗪衍生物的合成及其与磷酸三甲酚酯在菜子油中的摩擦学研究

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润滑与密封 2006年第1期31卷 23-25,28页

作者：何忠义熊丽萍刘红任天辉华东交通大学基础科学学院江西南昌330013 上海交通大学化学化工学院上海200240

合成了一种新型无磷三正辛硫基取代三嗪衍生物(TOTT),利用四球摩擦磨损试验机考察了单剂TOTT、磷酸三甲酚酯(TCP)以及含不同质量比的TOTT和TCP的复合添加剂在菜子油中的摩擦学研究;用X射线光电子能谱仪(XPS)和扫描电子显微镜(SEM)分析... 详细信息

合成了一种新型无磷三正辛硫基取代三嗪衍生物(TOTT),利用四球摩擦磨损试验机考察了单剂TOTT、磷酸三甲酚酯(TCP)以及含不同质量比的TOTT和TCP的复合添加剂在菜子油中的摩擦学研究;用X射线光电子能谱仪(XPS)和扫描电子显微镜(SEM)分析了磨损表面形貌和元素化学形态。结果表明:所考察的添加剂都能有效提高基础油的承载能力;在一定的条件下,单剂TOTT和TCP能够有效地提高基础油的减摩和抗磨性能;TOTT/TCP复合剂在基础油中表现出协同抗磨和减摩效应。在摩擦过程中,含上述添加剂的菜子油与摩擦副表面发生了复杂的摩擦化学反应,在摩擦副表面生成混合边界润滑膜,从而起到了减摩抗磨作用。

关键词：三正辛硫基三嗪菜子油磷酸三甲酚酯(TCP) 摩擦学性能复合效应

三聚氯氰与N，N—二烷基荒氨酸钠盐的取代反应研究

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有机化学 2001年第10期21卷 759-762页

作者：李久盛詹威强饶文琦任天辉王大璞上海交通大学化学化工学院

采用不同烷基的N,N-二烷基荒氨酸钠盐与三聚氯氰进行取代反应,合成了四个新化合物,产物结构经元素分析,IR,MS和1H NMR表征.实验结果表明,反应得到的不完全是预想的三嗪的三荒氨酸取代产物,而是具有三种不同结构的产物,并对这一反应可能... 详细信息

采用不同烷基的N,N-二烷基荒氨酸钠盐与三聚氯氰进行取代反应,合成了四个新化合物,产物结构经元素分析,IR,MS和1H NMR表征.实验结果表明,反应得到的不完全是预想的三嗪的三荒氨酸取代产物,而是具有三种不同结构的产物,并对这一反应可能的机理进行了讨论.

关键词：三聚氯氰荒氨酸取代反应 N,N-二烷基荒氨酸钠盐衍生物润滑油添加剂