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المؤلفNasser, Mustafa S.
المؤلفAl-Marri, Mohammed J.
المؤلفBenamor, Abdelbaki
المؤلفOnaizi, Sagheer A.
المؤلفKhraisheh, Majeda
المؤلفSaad, Mohammed A.
تاريخ الإتاحة2021-04-29T08:10:45Z
تاريخ النشر2016
اسم المنشورKorean Journal of Chemical Engineering
المصدرScopus
الرقم المعياري الدولي للكتاب2561115
معرّف المصادر الموحدhttp://dx.doi.org/10.1007/s11814-015-0167-y
معرّف المصادر الموحدhttp://hdl.handle.net/10576/18387
الملخصThe effects of the surface charge type and density C496, C492 and A130LMW polyacrylamides (PAMs) on the rheological behavior of real industrial papermaking suspensions were quantitatively related to the degree of flocculation for the same industrial papermaking suspensions. The floc sizes were larger but less dense when anionic PAM was used, and this due to the repulsive forces between the anionic PAM and colloidal particles, leading to the development of open structure flocs of less density. On the other hand, rheological measurements showed that the papermaking suspension is thixotropic with a measurable yield stress. The results showed that the magnitude of the critical stress, ?c, complex viscosity, ?*, elastic modulus, G?, and viscous modulus, G?, depend on the number of interactions between the PAM chains and particle surface and the strength of those interactions. Cationic PAM showed higher values of ?*, G?, G? and ?c compared to anionic PAM. This behavior is in good agreement with Bingham yield stress, ?B, adsorption and effective floc density results. Similar to oscillatory measurements, creep measurements also showed that the deformation was much lower for the cationic PAM based suspensions than for the anionic PAM based suspensions. Furthermore, the results revealed that increasing the cationic PAM surface charge decreases the floc size but increases the adsorption rate, elasticity and effective floc density proposing differences in the floc structures, which are not revealed clearly in the Bingham yield stress measurements.
اللغةen
الناشرSpringer New York LLC
الموضوعEffective Floc Density
Floc Size
Flocculation
Papermaking Suspensions
Rheology
العنوانFlocculation and viscoelastic behavior of industrial papermaking suspensions
النوعArticle
الصفحات448-455
رقم العدد2
رقم المجلد33
dc.accessType Abstract Only


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