Formulation of disperse systems science and technology
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2014
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| 100 | 1 | |a Tadros, Tharwat F. |d 1937-2018 |e Verfasser |0 (DE-588)129740837 |4 aut | |
| 245 | 1 | 0 | |a Formulation of disperse systems |b science and technology |c Tharwat F. Tadros |
| 264 | 1 | |a Weinheim |b Wiley-VCH |c 2014 | |
| 300 | |a XIX, 483 S. |b Ill., graph. Darst. | ||
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Datensatz im Suchindex
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| adam_text | CONTENTS
PREFACE XVII
1 GENERAL INTRODUCTION 1
1.1 SUSPENSIONS 1
1.2 LATEXES 2
1.3 EMULSIONS 2
1.4 SUSPOEMULSIONS 3
1.5 MULTIPLE EMULSIONS 3
1.6 NANOSUSPENSIONS 4
1.7 NANOEMULSIONS 4
1.8 MICROEMULSIONS 5
1.9 PIGMENT AND INK DISPERSIONS 5
1.10 FOAMS 5
REFERENCES 9
2 SURFACTANTS USED IN FORMULATION OF DISPERSIONS 11
2.1 GENERAL CLASSIFICATION OF SURFACE-ACTIVE AGENTS 12
2.1.1 ANIONIC SURFACTANTS 13
2.1.1.1 CARBOXYLATES 13
2.1.1.2 SULPHATES 14
2.1.1.3 SULPHONATES 15
2.1.1.4 PHOSPHATE-CONTAINING ANIONIC SURFACTANTS 16
2.1.2 CATIONIC SURFACTANTS 16
2.1.3 AMPHOTERIC (ZWITTERIONIC) SURFACTANTS 17
2.1.4 NONIONIC SURFACTANTS 18
2.1.4.1 ALCOHOL ETHOXYLATES 19
2.1.4.2 ALKYL PHENOL ETHOXYLATES 19
2.1.4.3 FATTY ACID ETHOXYLATES 20
2.1.4.4 SORBITAN ESTERS AND THEIR ETHOXYLATED DERIVATIVES (SPANS AND
TWEENS) 20
2.1.4.5 ETHOXYLATED FATS AND OILS 21
2.1.4.6 AMINE ETHOXYLATES 21
2.1.4.7 AMINE OXIDES 21
HTTP://D-NB.INFO/1047121298
VII CONTENTS
2.1.5 SPECIALTY SURFACTANTS 22
2.1.5.1 FLUOROCARBON AND SILICONE SURFACTANTS 22
2.1.5.2 GEMINI SURFACTANTS 23
2.1.5.3 SURFACTANTS DERIVED FROM MONOSACCHARIDES AND POLYSACCHARIDES 23
REFERENCES 24
3 PHYSICAL CHEMISTRY OF SURFACTANT SOLUTIONS AND THE PROCESS OF
MICELLISATION 27
3.1 THERMODYNAMICS OF MICELLISATION 33
3.1.1 KINETIC ASPECTS 34
. 3.1.2 EQUILIBRIUM ASPECTS: THERMODYNAMICS OF MICELLISATION 35
3.2 ENTHALPY AND ENTROPY OF MICELLISATION 37
3.2.1 DRIVING FORCE FOR MICELLE FORMATION 38
3.2.2 MICELLISATION IN SURFACTANT MIXTURES (MIXED MICELLES) 40
REFERENCES 43
4 DISPERSANTS AND POLYMERIC SURFACTANTS 45
4.1 SOLUTION PROPERTIES OF POLYMERIC SURFACTANTS 46
4.2 GENERAL CLASSIFICATION OF POLYMERIC SURFACTANTS 50
4.3 POLYELECTROLYTES 53
REFERENCES 54
5 ADSORPTION OF SURFACTANTS AT THE AIR/LIQUID, LIQUID/LIQUID, AND
SOLID/LIQUID INTERFACES 55
5.1 INTRODUCTION 55
5.2 ADSORPTION OF SURFACTANTS AT THE AIR/LIQUID (A/L) AND LIQUID/LIQUID
(L/L) INTERFACES 56
5.3 THE GIBBS ADSORPTION ISOTHERM 57
5.4 EQUATION OF STATE APPROACH 60
5.5 THE LANGMUIR, SZYSZKOWSKI, AND FRUMKIN EQUATIONS 62
5.6 INTERFACIAL TENSION MEASUREMENTS 63
5.6.1 THE WILHELMY PLATE METHOD 63
5.6.2 THE PENDANT DROP METHOD 64
5.6.3 THE DU NOUY S RING METHOD 64
5.6.4 THE DROP VOLUME (WEIGHT) METHOD 65
5.6.5 THE SPINNING DROP METHOD 65
5.7 ADSORPTION OF SURFACTANTS AT THE SOLID/LIQUID (S/L) INTERFACE 66
5.7.1 ADSORPTION OF IONIC SURFACTANTS ON HYDROPHOBIC SURFACES 68
5.7.2 ADSORPTION OF IONIC SURFACTANTS ON POLAR SURFACES 71
5.7.3 ADSORPTION OF NONIONIC SURFACTANTS 72
REFERENCES 74
6
6.1
ADSORPTION OF POLYMERIC SURFACTANTS AT THE SOLID/LIQUID INTERFACE 77
THEORIES OF POLYMER ADSORPTION 80
CONTENTS VII
6.2 EXPERIMENTAL TECHNIQUES FOR STUDYING POLYMERIC SURFACTANT
ADSORPTION 88
6.2.1 MEASUREMENT OF THE ADSORPTION ISOTHERM 88
6.2.2 MEASUREMENT OF THE FRACTION OF SEGMENTS, P 89
6.3 DETERMINATION OF SEGMENT DENSITY DISTRIBUTION P(Z) AND ADSORBED
LAYER THICKNESS 8
H
89
6.4 EXAMPLES OF THE ADSORPTION ISOTHERMS OF NONIONIC POLYMERIC
SURFACTANTS 92
6.4.1 ADSORBED LAYER THICKNESS RESULTS 96
6.4.2 KINETICS OF POLYMER ADSORPTION 98
REFERENCES 98
7 COLLOID STABILITY OF DISPERSE SYSTEMS CONTAINING ELECTRICAL DOUBLE
LAYERS 101
7.1 ORIGIN OF CHARGE ON SURFACES 101
7.1.1 SURFACE IONS 101
7.1.2 ISOMORPHIC SUBSTITUTION 102
12 STRUCTURE OF THE ELECTRICAL DOUBLE LAYER 103
7.2.1 DIFFUSE DOUBLE LAYER (GOUY AND CHAPMAN) 103
7.3 STERN-GRAHAME MODEL OF THE DOUBLE LAYER 104
7.4 DISTINCTION BETWEEN SPECIFIC AND NONSPECIFIC ADSORBED IONS 104
7.5 ELECTRICAL DOUBLE LAYER REPULSION 105
7.6 VAN DER WAALS ATTRACTION 106
7.7 TOTAL ENERGY OF INTERACTION 109
7.7.1 DERYAGUIN-LANDAU-VERWEY-OVERBEEK (DLVO) THEORY 109
7.8 FLOCCULATION OF SUSPENSIONS 111
7.9 CRITERIA FOR STABILISATION OF DISPERSIONS WITH DOUBLE LAYER
INTERACTION 113
REFERENCES 114
8 STABILITY OF DISPERSE SYSTEMS CONTAINING ADSORBED NONIONIC
SURFACTANTS OR POLYMERS: STERIC STABILISATION 115
8.1 INTRODUCTION 115
8.2 INTERACTION BETWEEN PARTICLES CONTAINING ADSORBED NONIONIC AND
POLYMERIC SURFACTANT LAYERS (STERIC STABILISATION) 116
8.3 MIXING INTERACTION G^ 117
8.4 ELASTIC INTERACTION G
E
|
118
8.5 TOTAL ENERGY OF INTERACTION 119
8.6 CRITERIA FOR EFFECTIVE STERIC STABILISATION 120
8.7 FLOCCULATION OF STERICALLY STABILISED DISPERSIONS 121
8.7.1 WEAK FLOCCULATION 121
8.7.2 INCIPIENT FLOCCULATION 121
8.7.3 DEPLETION FLOCCULATION 122
REFERENCES 123
VIIII CONTENTS
9 FORMULATION OF SOLID/LIQUID DISPERSIONS (SUSPENSIONS) 125
9.1 INTRODUCTION 125
9.2 PREPARATION OF SUSPENSIONS 126
9.3 CONDENSATION METHODS: NUCLEATION AND GROWTH 126
9.4 DISPERSION METHODS 128
9.4.1 WETTING OF POWDERS BY LIQUIDS 129
9.4.2 STRUCTURE OF THE SOLID/LIQUID INTERFACE AND THE ELECTRICAL DOUBLE
LAYER 131
9.4.2.1 ELECTRICAL DOUBLE LAYER REPULSION 132
9.4.2.2 VAN DER WAALS ATTRACTION 132
9.4.2.3 TOTAL ENERGY OF INTERACTION 133
9.4.2.4 CRITERIA FOR STABILISATION OF SUSPENSIONS WITH DOUBLE LAYER
INTERACTION 135
9.4.2.5 ELECTROKINETIC PHENOMENA AND THE ZETA-POTENTIAL 135
9.4.2.6 CALCULATION OF THE ZETA-POTENTIAL 136
9.4.2.7 MEASUREMENT OF THE ZETA-POTENTIAL 137
9.4.3 DISPERSING AGENTS FOR FORMULATION OF SUSPENSIONS 139
9.4.4 ADSORPTION OF SURFACTANTS AT THE SOLID/LIQUID INTERFACE 139
9.4.5 STERIC STABILISATION OF SUSPENSIONS 141
9.4.6 FLOCCULATION OF STERICALLY STABILISED SUSPENSIONS 143
9.4.7 PROPERTIES OF CONCENTRATED SUSPENSIONS 144
9.4.8 CHARACTERISATION OF SUSPENSIONS AND ASSESSMENT OF THEIR
STABILITY 149
9.4.8.1 OPTICAL MICROSCOPY 150
9.4.8.2 ELECTRON MICROSCOPY 151
9.4.8.3 CONFOCAL LASER SCANNING MICROSCOPY 151
9.4.8.4 SCATTERING TECHNIQUES 151
9.5 BULK PROPERTIES OF SUSPENSIONS 152
9.5.1 RHEOLOGICAL MEASUREMENTS 152
9.5.2 SEDIMENTATION OF SUSPENSIONS AND PREVENTION OF FORMATION OF
DILATANT SEDIMENTS (CLAYS) 153
9.5.3 PREVENTION OF SEDIMENTATION AND FORMATION OF DILATANT
SEDIMENTS 156
REFERENCES 159
10 FORMULATION OF LIQUID/LIQUID DISPERSIONS (EMULSIONS) 161
10.1 INTRODUCTION 161
10.1.1 CREAMING AND SEDIMENTATION 161
10.1.2 FLOCCULATION 162
10.1.3 OSTWALD RIPENING (DISPROPORTIONATION) 162
10.1.4 COALESCENCE 163
10.1.5 PHASE INVERSION 163
10.2 INDUSTRIAL APPLICATIONS OF EMULSIONS 163
10.3 PHYSICAL CHEMISTRY OF EMULSION SYSTEMS 164
10.3.1 THE INTERFACE (CIBBS DIVIDING LINE) 164
CONTENTS IIX
10.3.2 THERMODYNAMICS OF EMULSION FORMATION AND BREAKDOWN 165
10.3.3 INTERACTION ENERGIES (FORCES) BETWEEN EMULSION DROPLETS AND THEIR
COMBINATIONS 166
10.3.3.1 VAN DER WAALS ATTRACTIONS 166
10.3.3.2 ELECTROSTATIC REPULSION 167
10.3.3.3 STERIC REPULSION 170
10.4 ADSORPTION OF SURFACTANTS AT THE LIQUID/LIQUID INTERFACE 172
10.4.1 MECHANISM OF EMULSIFICATION 174
10.4.2 METHODS OF EMULSIFICATION 175
10.4.3 ROLE OF SURFACTANTS IN EMULSION FORMATION 177
10.4.4 ROLE OF SURFACTANTS IN DROPLET DEFORMATION 179
10.5 SELECTION OF EMULSIFIERS 183
10.5.1 THE HYDROPHILIC-LIPOPHILIC BALANCE (HLB) CONCEPT 183
10.5.2 THE PHASE INVERSION TEMPERATURE (PIT) CONCEPT 186
10.6 CREAMING OR SEDIMENTATION OF EMULSIONS 187
10.6.1 CREAMING OR SEDIMENTATION RATES 188
10.6.1.1 VERY DILUTE EMULSIONS ( /
0.01) 188
10.6.1.2 MODERATELY CONCENTRATED EMULSIONS (0.2 P 0.1) 189
10.6.1.3 CONCENTRATED EMULSIONS
( P
0.2) 189
10.6.2 PREVENTION OF CREAMING OR SEDIMENTATION 190
10.6.2.1 MATCHING THE DENSITY OF OIL AND AQUEOUS PHASES 190
10.6.2.2 REDUCTION OF DROPLET SIZE 190
10.6.2.3 USE OF THICKENERS 190
10.6.2.4 CONTROLLED FLOCCULATION 191
10.6.2.5 DEPLETION FLOCCULATION 191
10.7 FLOCCULATION OF EMULSIONS 192
10.7.1 MECHANISM OF EMULSION FLOCCULATION 193
10.7.1.1 FLOCCULATION OF ELECTROSTATICALLY STABILISED EMULSIONS 193
10.7.1.2 FLOCCULATION OF STERICALLY STABILISED EMULSIONS 195
10.8 GENERAL RULES FOR REDUCING (ELIMINATING) FLOCCULATION 196
10.8.1 CHARGE-STABILISED EMULSIONS (E.G., USING IONIC SURFACTANTS) 196
10.8.2 STERICALLY STABILISED EMULSIONS 196
10.9 OSTWALD RIPENING 196
10.10 EMULSION COALESCENCE 198
10.10.1 RATE OF COALESCENCE 200
10.11 PHASE INVERSION 200
REFERENCES 201
11 FORMULATION OFSUSPOEMULSIONS (MIXTURES OF SUSPENSIONS AND
EMULSIONS) 203
11.1 INTRODUCTION 203
11.2 SUSPOEMULSIONS IN PAINTS 204
11.2.1 SUSPOEMULSIONS IN SUNSCREENS AND COLOUR COSMETICS 207
11.3 SUSPOEMULSIONS IN AGROCHEMICALS 219
X | CONTENTS
11.3.1 MODEL SUSPOEMULSION OF POLYSTYRENE LATEX AND ISOPARAFFINIC OIL
STABILISED WITH SYNPERONIC PE (PEO-PPO-PEO A-B-A BLOCK
COPOLYMER)
225
11.3.2 MODEL SYSTEMS OF POLYSTYRENE LATEX WITH GRAFTED PEO CHAINS AND
HEXADECANE EMULSIONS 227
REFERENCES 230
12 FORMULATION OF MULTIPLE EMULSIONS 231
12.1 INTRODUCTION 231
12.2 PREPARATION OF MULTIPLE EMULSIONS 232
12.3 TYPES OF MULTIPLE EMULSIONS 233
12.4 BREAKDOWN PROCESSES OF MULTIPLE EMULSIONS 233
12.5 FACTORS AFFECTING STABILITY OF MULTIPLE EMULSIONS, AND CRITERIA FOR
THEIR STABILISATION 235
12.6 GENERAL DESCRIPTION OF POLYMERIC SURFACTANTS 237
12.7 INTERACTION BETWEEN OIL OR WATER DROPLETS CONTAINING AN ADSORBED
POLYMERIC SURFACTANT: STERIC STABILISATION 238
12.8 EXAMPLES OF MULTIPLE EMULSIONS USING POLYMERIC SURFACTANTS 246
12.9 CHARACTERISATION OF MULTIPLE EMULSIONS 247
12.9.1 DROPLET SIZE MEASUREMENTS 247
12.10 RHEOLOGICAL MEASUREMENTS 248
REFERENCES 249
13 PREPARATION OF NANOSUSPENSIONS 251
13.1 INTRODUCTION 251
13.2 NUCLEATION AND GROWTH, AND CONTROL OF PARTICLE SIZE
DISTRIBUTION 252
13.3 PREPARATION OF NANOSUSPENSIONS BY BOTTOM-UP PROCESSES 254
13.3.1 SOLVENT-ANTISOLVENT METHOD 255
13.3.2 USE OF A NANOEMULSION 255
13.3.3 MIXING TWO MICROEMULSIONS 256
13.3.4 PREPARATION OF POLYMER NANOPARTICLES BY MINIEMULSION OR
MINISUSPENSION POLYMERISATION 256
13.4 PREPARATION OF NANOSUSPENSIONS USING THE BOTTOM-DOWN
PROCESS 257
13.4.1 WETTING OF THE BULK POWDER 257
13.4.2 BREAKING OF AGGREGATES AND AGGLOMERATES INTO INDIVIDUAL UNITS 260
13.4.3 WET MILLING OR COMMINUTION 260
13.4.4 STABILISATION OF THE RESULTING DISPERSION 261
13.4.5 PREVENTION OF OSTWALD RIPENING (CRYSTAL GROWTH) 268
REFERENCES 268
14
14.1
14.2
FORMULATION OF NANOEMULSIONS 271
INTRODUCTION 271
MECHANISM OF EMUISIFICATION 273
CONTENTS I XI
14.3 METHODS OF EMULSIFICATION AND THE ROLE OF SURFACTANTS 275
14.4 PREPARATION OF NANOEMULSIONS 276
14.4.1 HIGH-PRESSURE HOMOGENISATION 276
14.4.2 PHASE INVERSION COMPOSITION (PIC) PRINCIPLE 277
14.4.3 PHASE INVERSION TEMPERATURE (PIT) PRINCIPLE 277
14.4.4 PREPARATION OF NANOEMULSIONS BY DILUTION OF MICROEMULSIONS 279
14.5 STERIC STABILISATION AND THE ROLE OF THE ADSORBED LAYER
THICKNESS 281
14.5.1 OSTWALD RIPENING 283
14.5.2 PRACTICAL EXAMPLES OF NANOEMULSIONS 284
14.5.3 NANOEMULSIONS BASED ON POLYMERIC SURFACTANTS 293
REFERENCES 299
15 FORMULATION OF MICROEMULSIONS 301
15.1 INTRODUCTION 301
15.2 THERMODYNAMIC DEFINITION OF MICROEMULSIONS 302
15.3 MIXED-FILM AND SOLUBILISATION THEORIES OF MICROEMULSIONS 303
15.3.1 MIXED-FILM THEORIES 303
15.3.2 SOLUBILISATION THEORIES 305
15.4 THERMODYNAMIC THEORY OF MICROEMULSION FORMATION 307
15.4.1 REASON FOR COMBINING TWO SURFACTANTS 308
15.4.2 FACTORS DETERMINING W/O VERSUS O/W MICROEMULSIONS 309
15.5 CHARACTERISATION OF MICROEMULSIONS USING SCATTERING
TECHNIQUES 311
15.5.1 TIME-AVERAGE (STATIC) LIGHT SCATTERING 311
15.5.2 CALCULATION OF DROPLET SIZE FROM INTERFACIAL AREA 313
15.5.3 DYNAMIC LIGHT SCATTERING (PHOTON CORRELATION SPECTROSCOPY;
PCS) 314
15.6 CHARACTERISATION OF MICROEMULSIONS USING CONDUCTIVITY 315
15.7 NMR MEASUREMENTS 316
15.8 FORMULATION OF MICROEMULSIONS 317
15.8.1 THE HLB SYSTEM 318
15.8.2 PHASE INVERSION TEMPERATURE (PIT) METHOD 319
15.8.3 THE COHESIVE ENERGY RATIO (CER) CONCEPT 320
15.8.4 COSURFACTANT PARTITIONING 322
REFERENCES 322
FURTHER READING 323
16 FORMULATION OF FOAMS 325
16.1 INTRODUCTION 325
16.2 FOAM PREPARATION 326
16.3 FOAM STRUCTURE 327
16.4 CLASSIFICATION OF FOAM STABILITY 328
16.5 DRAINAGE AND THINNING OF FOAM FILMS 329
16.6 THEORIES OF FOAM STABILITY 330
XII
| CONTENTS
16.6.1 SURFACE VISCOSITY AND ELASTICITY THEORY 330
16.6.2 THE GIBBS-MARANGONI EFFECT THEORY 330
16.6.3 SURFACE FORCES THEORY (DISJOINING PRESSURE
JC
) 331
16.6.4 STABILISATION BY MICELLES (HIGH SURFACTANT CONCENTRATIONS
CMC) 334
16.6.5 STABILISATION BY LAMELLAR LIQUID CRYSTALLINE PHASES 334
16.6.6 STABILISATION OF FOAM FILMS BY MIXED SURFACTANTS 334
16.7 FOAM INHIBITORS 335
16.7.1 CHEMICAL INHIBITORS THAT LOWER VISCOSITY AND INCREASE DRAINAGE
335
16.7.2 SOLUBILISED CHEMICALS WHICH CAUSE ANTIFOAMING 335
16.7.3 DROPLETS AND OIL LENSES WHICH CAUSE ANTIFOAMING AND
DEFOAMING 336
16.7.4 SURFACE TENSION GRADIENTS (INDUCED BY ANTIFOAMERS) 336
16.7.5 HYDROPHOBIC PARTICLES AS ANTIFOAMERS 337
16.7.6 MIXTURES OF HYDROPHOBIC PARTICLES AND OILS AS ANTIFOAMERS 338
16.8 PHYSICAL PROPERTIES OF FOAMS 338
16.8.1 MECHANICAL PROPERTIES 338
16.8.2 RHEOLOGICAL PROPERTIES 339
16.8.3 ELECTRICAL PROPERTIES 340
16.8.4 ELECTROKINETIC PROPERTIES 340
16.8.5 OPTICAL PROPERTIES 341
16.9 EXPERIMENTAL TECHNIQUES FOR STUDYING FOAMS 341
16.9.1 STUDIES ON FOAM FILMS 341
16.9.2 STRUCTURAL PARAMETERS OF FOAMS 342
16.9.3 FOAM DRAINAGE 342
16.9.4 FOAM COLLAPSE 343
REFERENCES 343
17 FORMULATION OF LATEXES 345
17.1 INTRODUCTION 345
17.2 EMULSION POLYMERISATION 346
17.2.1 MECHANISM OF EMULSION POLYMERISATION 348
17.2.2 BLOCK COPOLYMERS AS STABILISERS IN EMULSION POLYMERISATION 349
17.2.3 GRAFT COPOLYMERS AS STABILISERS IN EMULSION POLYMERISATION 352
17.3 POLYMERIC SURFACTANTS FOR STABILISATION OF PREFORMED LATEX
DISPERSIONS 356
17.4 DISPERSION POLYMERISATION 360
17.4.1 MECHANISM OF DISPERSION POLYMERISATION 362
17.4.2 INFLUENCE OF POLYMERIC SURFACTANT CONCENTRATION AND MOLECULAR
WEIGHT ON PARTICLE FORMATION 363
17.4.3 EFFECT OF MONOMER SOLUBILITY AND CONCENTRATION IN THE CONTINUOUS
PHASE 363
17.4.4 STABILITY/INSTABILITY OF THE RESULTING LATEX 364
17.4.5 PARTICLE FORMATION IN POLAR MEDIA 364
REFERENCES 365
CONTENTS I XIII
18 FORMULATION OF PIGMENT AND INK DISPERSIONS 367
18.1 INTRODUCTION 367
18.2 POWDER WETTING 370
18.2.1 EFFECT OF SURFACTANT ADSORPTION 374
18.2.2 WETTING OF POWDERS BY LIQUIDS 375
18.2.3 MEASUREMENT OF WETTABILITY OF POWDERS 377
18.2.3.1 SUBMERSION TEST: SINKING TIME OR IMMERSION TIME 377
18.2.4 MEASUREMENT OF CONTACT ANGLES OF LIQUIDS AND SURFACTANT SOLUTIONS
ON POWDERS 378
18.2.5 WETTING AGENTS FOR HYDROPHOBIC PIGMENTS 379
18.2.6 DYNAMICS OF PROCESSING OF ADSORPTION AND WETTING 380
18.2.7 EXPERIMENTAL TECHNIQUES FOR STUDYING ADSORPTION KINETICS 384
18.3 BREAKING OF AGGREGATES AND AGGLOMERATES (DEAGGLOMERATION) 387
18.4 CLASSIFICATION OF DISPERSANTS 388
18.4.1 SURFACTANTS 388
18.4.2 POLYMERIC SURFACTANTS 389
18.4.3 POLYELECTROLYTES 390
18.4.4 ASSESSMENT AND SELECTION OF DISPERSANTS 391
18.4.4.1 ADSORPTION ISOTHERMS 391
18.4.4.2 MEASUREMENT OF DISPERSION AND PARTICLE SIZE DISTRIBUTION 392
18.4.4.3 WET MILLING (COMMINUTION) 392
18.4.4.4 BEAD MILLS 394
REFERENCES 395
19 METHODS OF EVALUATING FORMULATIONS AFTER DILUTION 397
19.1 INTRODUCTION 397
19.2 ASSESSMENT OF THE STRUCTURE OF THE SOLID/LIQUID INTERFACE 398
19.2.1 DOUBLE LAYER INVESTIGATION .398
19.2.1.1 ANALYTICAL DETERMINATION OF SURFACE CHARGE 398
19.2.1.2 ELECTROKINETIC AND ZETA-POTENTIAL MEASUREMENTS 399
19.2.2 MEASUREMENT OF SURFACTANT AND POLYMER ADSORPTION 400
19.3 ASSESSMENT OF SEDIMENTATION OF SUSPENSIONS 403
19.4 ASSESSMENT OF FLOCCULATION AND OSTWALD RIPENING (CRYSTAL
GROWTH) 405
19.4.1 OPTICAL MICROSCOPY 406
19.4.1.1 PHASE-CONTRAST MICROSCOPY 406
19.4.1.2 DIFFERENTIAL INTERFERENCE CONTRAST (DIC) MICROSCOPY 407
19.4.1.3 POLARISED LIGHT MICROSCOPY 407
19.4.1.4 SAMPLE PREPARATION FOR OPTICAL MICROSCOPY 407
19.4.1.5 PARTICLE SIZE MEASUREMENTS USING OPTICAL MICROSCOPY 407
19.4.2 ELECTRON MICROSCOPY 408
19.4.2.1 TRANSMISSION ELECTRON MICROSCOPY 408
19.4.2.2 SCANNING ELECTRON MICROSCOPY 409
19.4.3 CONFOCAL LASER SCANNING MICROSCOPY 409
19.4.4 SCANNING PROBE MICROSCOPY 409
XIV
I
CONTENTS
19.4.5 SCANNING TUNNELING MICROSCOPY 410
19.4.6 ATOMIC FORCE MICROSCOPY 410
19.5 SCATTERING TECHNIQUES 411
19.5.1 LIGHT-SCATTERING 411
19.5.1.1 TIME-AVERAGE LIGHT SCATTERING 411
19.5.1.2 RAYLEIGH-GANS-DEBYE REGIME (RGD) X./20 R X 412
19.5.2 TURBIDITY MEASUREMENTS 412
19.5.3 LIGHT-DIFFRACTION TECHNIQUES 413
19.5.4 DYNAMIC LIGHT SCATTERING (DLS): PHOTON CORRELATION SPECTROSCOPY
(PCS) 415
19.5.5 BACK-SCATTERING TECHNIQUES 418
19.6 MEASUREMENT OF RATE OF FLOCCULATION 418
19.7 MEASUREMENT OF INCIPIENT FLOCCULATION 419
19.8 MEASUREMENT OF CRYSTAL GROWTH (OSTWALD RIPENING) 420
19.9 BULK PROPERTIES OF SUSPENSIONS: EQUILIBRIUM SEDIMENT VOLUME
(OR HEIGHT) AND REDISPERSION 420
REFERENCES 421
20 EVALUATING FORMULATIONS WITHOUT DILUTION: RHEOLOGICAL
TECHNIQUES 423
20.1 INTRODUCTION 423
20.2 STEADY-STATE MEASUREMENTS 424
20.2.1 RHEOLOGICAL MODELS FOR ANALYSIS OF FLOW CURVES 424
20.2.1.1 NEWTONIAN SYSTEMS 424
20.2.1.2. BINGHAM PLASTIC SYSTEMS 425
20.2.1.3 PSEUDOPLASTIC (SHEAR THINNING) SYSTEM 425
20.2.1.4 DILATANT (SHEAR THICKENING) SYSTEM 425
20.2.1.5 HERSCHEL-BULKLEY GENERAL MODEL 426
20.2.1.6 THE CASSON MODEL 426
20.2.1.7 THE CROSS EQUATION 426
20.2.2 TIME EFFECTS DURING FLOW: THIXOTROPY AND NEGATIVE (OR ANTI-)
THIXOTROPY 426
20.3 CONSTANT STRESS (CREEP) MEASUREMENTS 429
20.3.1 ANALYSIS OF CREEP CURVES 430
20.3.1.1 VISCOUS FLUID 430
20.3.1.2 ELASTIC SOLID 430
20.3.2 VISCOELASTIC RESPONSE 430
20.3.2.1 VISCOELASTIC LIQUID 430
20.3.2.2 VISCOELASTIC SOLID 431
20.3.3 CREEP PROCEDURE 431
20.4 DYNAMIC (OSCILLATORY) MEASUREMENTS 432
20.4.1 ANALYSIS OF OSCILLATORY RESPONSE FOR A VISCOELASTIC SYSTEM 433
20.4.2 VECTOR ANALYSIS OF THE COMPLEX MODULUS 434
20.4.2.1 DYNAMIC VISCOSITY R| 434
20.4.2.2 STRAIN SWEEP 434
CONTENTS I XV
20.4.2.3 FREQUENCY SWEEP 434
20.4.3 THE COHESIVE ENERGY DENSITY E
C
436
20.4.4 APPLICATION OF RHEOLOGICAL TECHNIQUES TO ASSESS AND PREDICT THE
PHYSICAL STABILITY OF SUSPENSIONS 436
20.4.4.1 RHEOLOGICAL TECHNIQUES TO ASSESS SEDIMENTATION AND SYNERESIS
436
20.4.4.2 ROLE OFTHICKENERS 437
20.4.5 ASSESSMENT OF FLOCCULATION USING RHEOLOGICAL TECHNIQUES 438
20.4.5.1 STRAIN SWEEP MEASUREMENTS 440
20.4.5.2 OSCILLATORY SWEEP MEASUREMENTS 441
REFERENCES 442
FURTHER READING 442
21 ASSESSMENT AND PREDICTION OF CREAMING, SEDIMENTATION, FLOCCULATION,
AND COALESCENCE OF FORMULATIONS 443
21.1 ASSESSMENT AND PREDICTION OF CREAMING AND SEDIMENTATION 443
21.1.1 INTRODUCTION 443
21.1.2 ACCELERATED TESTS AND THEIR LIMITATIONS 443
21.1.3 APPLICATION OF HIGH-GRAVITY (G) FORCES 444
21.1.4 RHEOLOGICAL TECHNIQUES FOR PREDICTION OF SEDIMENTATION OR
CREAMING 445
21.1.5 SEPARATION OF FORMULATION ( SYNERESIS ) 445
21.1.6 EXAMPLES OF CORRELATION OF SEDIMENTATION OR CREAMING WITH
RESIDUAL
(ZERO SHEAR) VISCOSITY 446
21.1.6.1 MODEL SUSPENSIONS OF AQUEOUS POLYSTYRENE LATEX 446
21.1.6.2 SEDIMENTATION IN NON-NEWTONIAN LIQUIDS 448
21.1.6.3 ROLE OFTHICKENERS 448
21.1.6.4 PREDICTION OF EMULSION CREAMING 449
21.1.6.5 CREEP MEASUREMENTS FOR PREDICTION OF CREAMING 450
21.1.6.6 OSCILLATORY MEASUREMENTS FOR PREDICTION OF CREAMING 451
21.2 ASSESSMENT AND PREDICTION OF FLOCCULATION USING RHEOLOGICAL
TECHNIQUES 452
21.2.1 INTRODUCTION 452
21.2.2 WALL SLIP 452
21.2.3 STEADY-STATE SHEAR STRESS-SHEAR RATE MEASUREMENTS 452
21.2.4 INFLUENCE OF OSTWALD RIPENING AND COALESCENCE 453
21.2.5 CONSTANT STRESS (CREEP) EXPERIMENTS 453
21.2.6 DYNAMIC (OSCILLATORY) MEASUREMENTS 454
21.2.6.1 STRAIN SWEEP MEASUREMENTS 454
21.2.6.2 OSCILLATORY SWEEP MEASUREMENTS 455
21.2.7 EXAMPLES OF THE APPLICATION OF RHEOLOGY FOR ASSESSMENT AND
PREDICTION OF FLOCCULATION 456
21.2.7.1 FLOCCULATION AND RESTABILISATION OF CLAYS USING CATIONIC
SURFACTANTS 456
21.2.7.2 FLOCCULATION OF STERICALLY STABILISED DISPERSIONS 457
21.2.7.3 FLOCCULATION OF STERICALLY STABILISED EMULSIONS 458
XVI
| CONTENTS
21.3 ASSESSMENT AND PREDICTION OF EMULSION COALESCENCE USING
RHEOLOGICAL TECHNIQUES 459
21.3.1 INTRODUCTION 459
21.3.2 RATE OF COALESCENCE 459
21.3.3 RHEOLOGICAL TECHNIQUES 460
21.3.3.1 VISCOSITY MEASUREMENTS 460
21.3.3.2 MEASUREMENT OF YIELD VALUE AS A FUNCTION OF TIME 461
21.3.3.3 MEASUREMENT OF STORAGE MODULUS G AS A FUNCTION OF TIME 461
21.3.4 CORRELATION BETWEEN ELASTIC MODULUS AND COALESCENCE 462
21.3.5 COHESIVE ENERGY E
C
463
REFERENCES 463
INDEX 465
|
| any_adam_object | 1 |
| author | Tadros, Tharwat F. 1937-2018 |
| author_GND | (DE-588)129740837 |
| author_facet | Tadros, Tharwat F. 1937-2018 |
| author_role | aut |
| author_sort | Tadros, Tharwat F. 1937-2018 |
| author_variant | t f t tf tft |
| building | Verbundindex |
| bvnumber | BV042004214 |
| classification_rvk | UV 9300 VE 7000 |
| ctrlnum | (OCoLC)870543634 (DE-599)DNB1047121298 |
| dewey-full | 541.34 |
| dewey-hundreds | 500 - Natural sciences and mathematics |
| dewey-ones | 541 - Physical chemistry |
| dewey-raw | 541.34 |
| dewey-search | 541.34 |
| dewey-sort | 3541.34 |
| dewey-tens | 540 - Chemistry and allied sciences |
| discipline | Chemie / Pharmazie Physik |
| format | Book |
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| id | DE-604.BV042004214 |
| illustrated | Illustrated |
| indexdate | 2025-02-03T17:41:49Z |
| institution | BVB |
| isbn | 3527336826 9783527336821 9783527678297 |
| language | English |
| oai_aleph_id | oai:aleph.bib-bvb.de:BVB01-027446189 |
| oclc_num | 870543634 |
| open_access_boolean | |
| owner | DE-11 DE-703 DE-29T DE-19 DE-BY-UBM DE-384 |
| owner_facet | DE-11 DE-703 DE-29T DE-19 DE-BY-UBM DE-384 |
| physical | XIX, 483 S. Ill., graph. Darst. |
| publishDate | 2014 |
| publishDateSearch | 2014 |
| publishDateSort | 2014 |
| publisher | Wiley-VCH |
| record_format | marc |
| spellingShingle | Tadros, Tharwat F. 1937-2018 Formulation of disperse systems science and technology Herstellung (DE-588)4159653-5 gnd Dispersion (DE-588)4012484-8 gnd Disperse Phase (DE-588)4365824-6 gnd |
| subject_GND | (DE-588)4159653-5 (DE-588)4012484-8 (DE-588)4365824-6 |
| title | Formulation of disperse systems science and technology |
| title_auth | Formulation of disperse systems science and technology |
| title_exact_search | Formulation of disperse systems science and technology |
| title_full | Formulation of disperse systems science and technology Tharwat F. Tadros |
| title_fullStr | Formulation of disperse systems science and technology Tharwat F. Tadros |
| title_full_unstemmed | Formulation of disperse systems science and technology Tharwat F. Tadros |
| title_short | Formulation of disperse systems |
| title_sort | formulation of disperse systems science and technology |
| title_sub | science and technology |
| topic | Herstellung (DE-588)4159653-5 gnd Dispersion (DE-588)4012484-8 gnd Disperse Phase (DE-588)4365824-6 gnd |
| topic_facet | Herstellung Dispersion Disperse Phase |
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