Thermogravimetric analysis of organic binder segregation during drying of particulate suspensions

Mandanas, Michael; Messing, Gary L.

doi:10.1016/s0040-6031(00)00591-8

Cited by 8 publications

(2 citation statements)

References 12 publications

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“…The PAA molecule added as a dispersant in the slurry adsorbs preferentially to PVA molecules on the particles, forming free PVA 3 . The free PVA binder can migrate to the drying surface with the evaporation of water during spray drying, causing the surface segregation of the PVA binder 10 . Segregated binder was commonly noted on granule surfaces in our past studies, and its origin is ascribed to the flow of water containing PVA in the spray‐drying process.…”

Section: Discussionmentioning

confidence: 91%

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Effect of Organic Binder Segregation on Sintered Strength of Dry‐Pressed Alumina

Tanaka

Uematsu

2006

Journal of the American Ceramic Society

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The influence of binder systems on the structure and properties of alumina ceramics was examined. Two types of binders were used to prepare alumina granules by spray drying: poly-acrylic acid (PAA) and poly-vinyl alcohol (PVA). PVA segregated to the surface and subsurface of the granules, whereas PAA was homogeneously distributed. Compaction tests on a single granule showed that the PAA binder provides lower yield stress of granules than PVA. In the die compaction process, the relative density of the compact body started to increase at a lower pressure, and a more homogeneous internal structure was observed in the green compact prepared with the PAA binder than PVA. The homogeneous structure resulted in a sintered body with a strength of 580 vs 485 MPa when PVA was used. 1903J ournal

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Section: Discussionmentioning

confidence: 91%

“…The mechanism of binder segregation has been reported 1,2,10 . In a spray‐drying process, a slurry consisting of powder, binder, dispersant, liquid, and other additives is sprayed and dried in a stream of hot air.…”

Section: Introductionmentioning

confidence: 99%

Effect of Organic Binder Segregation on Sintered Strength of Dry‐Pressed Alumina

Tanaka

Uematsu

2006

Journal of the American Ceramic Society

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Chitosan/pectin polyelectrolyte complex as a pH indicator

Maciel

Yoshida

Franco

2015

Carbohydrate Polymers

248

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A polyelectrolyte complex (PEC) matrix formed between chitosan and pectin was developed to entrap a bioactive compound (anthocyanin), obtaining an useful pH indicator device. Polysaccharides of opposite charges such as chitosan and pectin can have a very strong intermolecular interaction. The innovation lies in obtaining a new system based on natural and biodegradable compounds, which is simple to manufacture, to indicate variation in pH by visual changes in colour. This device has potential applications in food packaging. The PEC was studied using chitosan and pectin solutions at different pHs values (3.0, 4.0, 5.0 and 5.5) and pectin/chitosan molar ratios (1.0 to 10/1.0 to 5.0). PEC films were homogeneous and showed the highest yield (60.0%) at pH 5.5. Diffusion tests indicated efficient bioactive compound entrapment in the PEC matrix. Thermogravimetric analysis (TGA), scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectroscopy indicate the compatibility between the polymers and bioactive compound.

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Optimization of spray dried attrition-resistant iron based oxygen carriers for chemical looping reforming

Vos

Jacobs

Voort

et al. 2017

Chemical Engineering Journal

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Thermogravimetric analysis of organic binder segregation during drying of particulate suspensions

Cited by 8 publications

References 12 publications

Effect of Organic Binder Segregation on Sintered Strength of Dry‐Pressed Alumina

Effect of Organic Binder Segregation on Sintered Strength of Dry‐Pressed Alumina

Chitosan/pectin polyelectrolyte complex as a pH indicator

Optimization of spray dried attrition-resistant iron based oxygen carriers for chemical looping reforming

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