Biotribology最新文献_第3页

Evaluation of the influence of niacinamide and saccharide isomerate on the rheological behavior of a hydrogel for topical use 评价烟酰胺和糖异构物对外用水凝胶流变学行为的影响

Biotribology Pub Date : 2023-05-10 DOI: 10.1016/j.biotri.2023.100243

Mariane Massufero Vergilio , Jéssica Heline Lopes da Fonsêca , Marcos Akira d'Ávila , Gislaine Ricci Leonardi

{"title":"Evaluation of the influence of niacinamide and saccharide isomerate on the rheological behavior of a hydrogel for topical use","authors":"Mariane Massufero Vergilio , Jéssica Heline Lopes da Fonsêca , Marcos Akira d'Ávila , Gislaine Ricci Leonardi","doi":"10.1016/j.biotri.2023.100243","DOIUrl":"10.1016/j.biotri.2023.100243","url":null,"abstract":"<div><p>Among the cosmetic forms used to administer cosmetic actives, the gel form has been highly sought after, as it offers a non-greasy sensation and allows the application of the formulation associated with ultrasound techniques for skin rejuvenation, such as phonophoresis. The aim of the present study was to develop a stable system for delivering anti-aging actives to the skin containing niacinamide and saccharide isomerate. The formulation and base development stage included a stability and rheological study over 16 weeks. The rheological analysis consisted of steady-state flow measurements and amplitude sweep tests, followed by a frequency sweep test. Three-interval thixotropy testing (3ITT) was also performed. As a result, the developed system showed high stability throughout the 16-week period. The organoleptic and rheological stability profile of the base and the formulation was quite similar, indicating that the presence of actives is indifferent to gel stability. Furthermore, rheologically, the base and the formulation exhibited shear-thinning behavior. The addition of the actives in the formulation decreased the apparent viscosity value by nearly half of the original value. Strong viscoelastic behavior was evidenced in both samples. In the end, the 3ITT test revealed a high recovery of sample viscosity. It can be concluded that the developed gel is a promising formulation for the topical administration of the studied actives.</p></div>","PeriodicalId":38233,"journal":{"name":"Biotribology","volume":"35 ","pages":"Article 100243"},"PeriodicalIF":0.0,"publicationDate":"2023-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48249903","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental investigation and optimization of tribological characteristics of wooden journal bearings 木质轴颈轴承摩擦学特性的实验研究与优化

Biotribology Pub Date : 2023-04-17 DOI: 10.1016/j.biotri.2023.100241

Vishal Mourya, Skylab P. Bhore

{"title":"Experimental investigation and optimization of tribological characteristics of wooden journal bearings","authors":"Vishal Mourya, Skylab P. Bhore","doi":"10.1016/j.biotri.2023.100241","DOIUrl":"10.1016/j.biotri.2023.100241","url":null,"abstract":"<div><p>Wooden journal bearing is widely used in various applications such as wind turbines and marine bearings. In this paper, the wooden journal bearings is fabricated with teak wood due to their higher strength and durability. Various manufacturing operations such as cutting, turning, etc., are performed during the fabrication process of wooden journal bearings. After fabricating it, the experimental study is performed to analyze the influence of operating parameters on the tribological characteristics of wooden bearings. For this, the operating parameters such as speed and load are considered input variables. Whereas, the tribological characteristics of wooden bearings such as wear resistance and surface roughness are considered the output parameters. The major aim of this study is to analyze and optimize the tribological characteristics of wooden bearings. This can be achieved by increasing its wear resistance and increasing surface roughness. By using the response surface methodology (RSM), the influence of operating parameters (i.e. speed and load) on the tribological characteristics of wooden bearings are analyzed. Furthermore, the desirability function is used to obtain the optimal tribological characteristics of wooden bearings. These results show that speed is the most significant parameter for wear resistance and load for surface roughness of wooden bearings. Due to continuous operation, the wear rate of wooden bearings first increases and then decreases. In addition, the surface roughness of wooden bearings becomes smooth. The regression analysis develops the mathematical relationship between the operating parameters and the tribological characteristics of wooden bearings.</p></div>","PeriodicalId":38233,"journal":{"name":"Biotribology","volume":"35 ","pages":"Article 100241"},"PeriodicalIF":0.0,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47549487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Lubricating Performance of Polymer-Coated Liposomes 聚合物包覆脂质体的润滑性能

Biotribology Pub Date : 2023-04-05 DOI: 10.1016/j.biotri.2023.100239

Marianne Hiorth , Ljubica Mihailovic , Malgorzata Adamczak , Francisco M. Goycoolea , Anwesha Sarkar

{"title":"Lubricating Performance of Polymer-Coated Liposomes","authors":"Marianne Hiorth , Ljubica Mihailovic , Malgorzata Adamczak , Francisco M. Goycoolea , Anwesha Sarkar","doi":"10.1016/j.biotri.2023.100239","DOIUrl":"10.1016/j.biotri.2023.100239","url":null,"abstract":"<div><p>Dry mouth is a troublesome condition linked to lubrication failure and leads to other diseases such as fungal infections and wounds in the oral cavity. There are many commercial salivary substitutes in the market, but none with a long-lasting lubrication effect. Polymer-coated liposomes can be an interesting formulation strategy for retrieving the symptoms of dry mouth by mimicking the micelles of saliva. In the present study, polymer coated-liposomes were prepared by the conventional thin film method and subsequently coated with three different polymers with different charge densities; alginate, chitosan and hydrophobically modified ethyl hydroxyethyl cellulose (HM-EHEC). The prepared polymer-coated liposomes were studied concerning their lubricating properties using a ball-on-disc tribometer at 2 N load at 37 °C, and their flow behaviours were also measured. Solutions of the pure polymers and dispersions of the uncoated liposomes were also studied to investigate any contributions from the individual components. A commercial dry mouth product based on HEC (hydroxyethyl cellulose) and glycerol was also included. The formulations were measured as soon as possible after preparation and some of them after >4 weeks. Results demonstrated that all the positively-charged formulations (chitosan, positive liposomes and chitosan-coated liposomes) had superior lubricating properties with friction coefficients (μ < 0.1) at orally relevant speeds (50 mm/s) as compared to the neutral or negatively-charged systems. At boundary lubrication conditions (3 mm/s), the chitosan-coated liposomes obtained an even lower friction force than the individual components, thus indicating a synergistic effect between the polymer and the liposome.</p></div>","PeriodicalId":38233,"journal":{"name":"Biotribology","volume":"35 ","pages":"Article 100239"},"PeriodicalIF":0.0,"publicationDate":"2023-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46813583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Friction measurement of modified PDMS surfaces inspired by Malayopython Reticulatus 受马来蟒启发的改良PDMS表面的摩擦测量

Biotribology Pub Date : 2023-04-01 DOI: 10.1016/j.biotri.2023.100240

M. D. Ibrahim, Alyssa Asong Ananthan, D. S. A. Mahmod, Y. Sunami, P. Barroy, C. Chin, Syah Runniza Ahmad Bakri

引用次数: 0

Biotribology in the Cognitive Domain: Investigation of the Neural Response to a Textured Tactile Stimulus using Event-Related Potentials (ERP) 认知领域的生物摩擦学:用事件相关电位(ERP)研究纹理触觉刺激的神经反应

Biotribology Pub Date : 2023-01-01 DOI: 10.1016/j.biotri.2023.100250

Prasanth Renganathan , Christian J. Schwartz

引用次数: 0

Predicting textural attributes and frictional characteristics of topical formulations based on non-linear rheology 预测基于非线性流变的局部配方的纹理属性和摩擦特性

Biotribology Pub Date : 2023-01-01 DOI: 10.1016/j.biotri.2023.100249

Febin Cyriac, Tee Xin Yi, Pui Shan Chow