Hydroxypropyl methylcellulose and hydroxypropyl starch: Rheological and gelation effects on the phase structure of their mixed hydrocolloid system

Transfer hydrogenation of ketone; an in situ approach toward an eco-friendly reduction

“…51 Moreover, increasing temperature creates a higher interacting environment for both the hydrophobic and hydroxyl (hydrophilic) counterparts in thermal gel such as HPMC. 48 This is also demonstrated in the observed rate constant k obs computed, in the order of 0.16 min À1 < 0.24 min À1 < 0.29 min À1 at 30, 60, and 80 C respectively. The graph of k obs against the temperature is revealed in Fig.…”

“…At lower temperatures, HPMC displays liquid-like attributes that congeal upon an increase in temperature, where it potentially controls the structural and rheological pattern of the mixture. 48 The hydroxypropyl group of the HPMC interacts with the molecule of water to form hydrogen bonds, while around the hydrophobic region (methyl groups), an enclosure of orderly arranged water in the form of ‘‘cages’’ is formed at a lower temperature. When the temperature increases, the system gains energy, and the hydrogen bonds break free from their enclosure while the clusters of hydrophobic groups are likewise released.…”

Characterization of Layer-by-Layer Biodegradable Films Based on Hydroxypropyl Methylcellulose-Nanochitosan

“…The gelatinization behavior of a material might influence it. HPMC is known as the gelling agent, having groups of hydroxyls that establish a robust viscous suspension (Wang et al, 2021). On the other hand, nanochitosan only forms a gel through amino groups (Takeshita et al, 2021).…”

Increasing xanthan gum content could enhance the performance of agar/konjac glucomannan-based system

“…As the shear rate increased, the solutions showed a gradual decrease in the viscosity, which indicated a shear-thinning behavior (Xiu, Zhou, Zhu, Wang, & Zhang, 2011). Specifically, the molecular chains in the colloidal solution systems showed concurrent disentanglement and re-entanglement under shear stress conditions (R. Wang, Yu, Sun, & Xie, 2021). When the shear rate was increased, the rate of chain re-entanglement was difficult to keep pace with that of chain disentanglement (Z.…”

“…A higher DSR value indicates higher shear resistance and rheological stability (Y. Wang, Yu, et al, 2021). After 10 s of recovery in the third stage, the DSR value reached 90%-100% for the binary and ternary solutions.…”