{"title":"Interfacial Dynamics and Surface Mechanical Properties of Soft Materials","authors":"A. Takahara","doi":"10.1678/RHEOLOGY.41.271","DOIUrl":"https://doi.org/10.1678/RHEOLOGY.41.271","url":null,"abstract":"","PeriodicalId":17434,"journal":{"name":"Journal of the Society of Rheology, Japan","volume":"17 1","pages":"271-281"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80675395","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}
{"title":"Multi-Visco-Elastic Contact Model in Discrete Element Method - Numerical Simulations of Margarine’s Dynamics during Manufacturing Process -","authors":"Y. Shimizu, Kosuke Masuda, T. Sadakane","doi":"10.1678/RHEOLOGY.42.177","DOIUrl":"https://doi.org/10.1678/RHEOLOGY.42.177","url":null,"abstract":"The multi-visco-elastic contact model embedded in the Discrete Element Method (DEM), which was developed by authors previous study (Shimizu et al., 2012) 1) is applied to simulations of margarine’s dynamics in a pin machine, in order to improve margarine’s uniformity during manufacturing process. The results are compared with those using the linear contact model. Also, parametric studies are conducted by changing the operational conditions. As a result, it was found that the new developed multi-visco-elastic contact model represents margarine’s dynamics well during manufacturing process. The following results are considered from the numerical simulations, that is, (1) the migration process is slower than that of granular material, which is often modeled by using the linear contact model in the DEM, also the loaded torque on the machine is around 30 % from the case of using the linear contact model, (2) the migration proceeds mainly in the circumferential direction rather than in the radial direction, as movement of the bulk in the circumferential direction is much larger than that in the radial one, (3) performance of migration in the circumferential direction improves by increasing rotational speed, which is not expected in the radial direction though. Further studies to examine load characteristics of the machine are needed to use the model as a design tool for improvement of the machine’s performance and development of new machines.","PeriodicalId":17434,"journal":{"name":"Journal of the Society of Rheology, Japan","volume":"68 1","pages":"177-183"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82244001","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}
{"title":"球回転型(EMS)粘度計の開発および商品化","authors":"正範 保田, 奈美 倉内, 美希 中村, 太一 平野, 細田 真妃子","doi":"10.1678/RHEOLOGY.40.223","DOIUrl":"https://doi.org/10.1678/RHEOLOGY.40.223","url":null,"abstract":"","PeriodicalId":17434,"journal":{"name":"Journal of the Society of Rheology, Japan","volume":"10 1","pages":"223-228"},"PeriodicalIF":0.0,"publicationDate":"2013-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87023097","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}
Ayano Nakamura, A. Sogabe, Akiko Machida, I. Kaneda
{"title":"Development of Cosmetic Formulations Using Rheological Properties -Generation of New Aqueous Thickeners and Novel Attempt for Quantitative Sensory Evaluation-","authors":"Ayano Nakamura, A. Sogabe, Akiko Machida, I. Kaneda","doi":"10.1678/RHEOLOGY.41.209","DOIUrl":"https://doi.org/10.1678/RHEOLOGY.41.209","url":null,"abstract":"化粧品は薬事法において「人の身体を清潔にし,美化し, 魅力を増し,容貌を変え,または皮膚もしくは毛髪をすこ やかに保つために身体に塗布,散布,その他これらに類似 する方法で使用されることが目的とされているもので,人 体に対する作用が緩和なもの」と定義されている.人々は 化粧行為を通して健常な皮膚を維持するとともに,高揚感 やリラックス効果など,心的な満足感を得ることができる. この機能面だけではなく感性的な側面も重要である点にお いて,化粧品は非常に難解で興味深い分野であると捉えら れ,物質の変形と流動に関する学問である「レオロジー」は 化粧品の研究開発にとって非常に重要な役割を担っている. 化粧品は複雑な組成物であり,その構成要素は多岐に渡 る.構成要素はそれぞれの機能を担っているが,我々はこ の中でも特に「増粘剤」に注目した研究を続けてきた.増 粘剤が化粧品,特に乳化物処方において果たす役割は,連 続相を増粘して乳化安定性を高めること,分散安定性を高 めることなどの機能面が挙げられる.さらに塗布時の流動 特性を変える,すなわち,適切な増粘剤を配合することで, 「みずみずしさ」「さっぱりさ」,および「しっとりさ」など の化粧品の使用感触の基本を調整し感性的な側面の演出が 可能であり,増粘剤のバリエーションは化粧品基剤構築上 非常に重要であると言える.古くからローカストビーンガ ムなどの天然高分子やヒドロキシエチルセルロースなどの 半合成高分子,キサンタンガムなどの微生物産生高分子が 増粘剤として使用されてきた.これらは高分子の絡み合い Development of Cosmetic Formulations Using Rheological Properties -Generation of New Aqueous Thickeners and Novel Attempt for Quantitative Sensory Evaluation-","PeriodicalId":17434,"journal":{"name":"Journal of the Society of Rheology, Japan","volume":"118 1","pages":"209-215"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88023814","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}