Dimensionless plot analysis: A new way to analyze functionalized microgels

Kinetics of spontaneous microgels adsorption and stabilization of emulsions produced using microfluidics

“…The cross-linker concentration was kept constant and equal to 2.5 mol% with respect to NIPAM. According to previous work by Pelton et al [24] , pNIPAM-AA exhibit relatively low block content and a relatively homogeneous radial distribution of the charges in the gel matrix.…”

“…During the synthesis, 10 mol% of acrylic acid was incorporated in the microgels containing 2.5 mol% of cross-linker. According to previous studies [24,25], the radial distribution of the charges is relatively homogeneous. As the pKa of acrylic acid is 4.25, in distilled water (pH=6) the ionisation may be considered as total.…”

“…The deformability as well as the uneven distribution of the cross-linker have also consequences on many emulsions features like emulsion flocculation state, emulsion resistance to handling [10,21] … Additionally to the temperature sensitivity, a pH-sensitivity can be conferred to the microgels by introducing a pH sensitive monomer [10,19,22,23] as for example an acidic function during the synthesis. Again, depending on the monomer reactivity, the charges can be distributed homogeneously in the microgels or preferentially at the periphery [23][24][25]. Such charged microgels are also able to stabilize emulsions that become temperature and pH-sensitive [10,19,22,23].…”

The Internal Network Dynamics of Poly(NIPAM) Based Copolymer Micro- and Macrogels: A Comparative Neutron Spin-Echo Study

“…However, the part of the curve which was accessible at pH 2.0 is in good approximation identical with the swelling curve of respective poly(NIPAM) homopolymer particles. The squares in Figure 6 represent the inverse of swelling ratio , which was calculated by using Equation (22) [2,52].…”

“…Therefore, in the present contribution 3-butenoic acid ((BAc), also called vinyl acetic acid) was used as a comonomer [10,22,23]. For a homogeneous distribution of the crosslinker in a gel the way in which the gel has been formed is very important.…”