Interfacial Properties of Methylcelluloses: The Influence of Molar Mass
作者: Pauline L. NasattoFrédéric PignonJoana L. M. SilveiraMaria Eugênia R. DuarteMiguel D. NosedaMarguerite Rinaudo
作者单位: 1epartamento de Bioquímica e Biologia Molecular, Federal University of Paraná, P.O. Box 19046, CEP 81531-980, Curitiba, Paraná, Brazil
2Laboratoire rhéologie et procédés (LRP), University Grenoble Alpes, F-38000 Grenoble, France
3Departamento de Bioquímica e Biologia Molecular, Federal University of Paraná, P.O. Box 19046, CEP 81531-980, Curitiba, Paraná, Brazil
4Departament
刊名: Polymers, 2014, Vol.6 (12), pp.2961-2973
来源数据库: Directory of Open Access Journals
DOI: 10.3390/polym6122961
关键词: Surface tensionAdsorptionElectrokinetic potentialMethylcelluloseMolar mass influenceSilica particles
原始语种摘要: The interfacial interactions of four methylcelluloses having the same average degree of substitution and distribution of methyl groups, but different molar masses, are studied at ambient temperature and at very low polymer concentrations. Firstly, the surface tension σ at the water/air interface is determined for the progressive addition of methylcellulose up to 100 mg/L; σ starts to decrease over 1 mg/L up to the critical aggregation concentration (CAC) at 10 mg/L. The curves describing the influence of polymer concentration on σ are independent of the molar mass at equilibrium. Secondly, the adsorption of methylcellulose on silica particles is estimated from ζ-potential measurements. The data are interpreted in terms of an increase of the adsorbed layer thickness at the interface when...
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关键词翻译
关键词翻译
  • potential 
  • concentration 浓度
  • substitution 同位素置换
  • tension 张力
  • equilibrium 平衡
  • adsorbed 被吸附的
  • Adsorption 吸附
  • influence 影响
  • polymer 聚合物
  • forming 成形