Preparation and properties of non-ionic polyurethane surfactants

Monitoring Micelle Formation of Nonionic Polyurethane in Water by Fluorescence Spectrophotometry

“…These nonionic polyurethanes have the same PU segment, a long hydrophopic chain (upper left and center) and two hydrophilic ethoxyl chains on one end (lower left and upper right). The difference among them was the Table 1 Properties of the non-ionic polyurethanes [38] M w eth * CMC * * γ cmc * * * length of the hydrophilic ethoxyl groups. [38] Their properties are listed in Table 1.…”

“…The difference among them was the Table 1 Properties of the non-ionic polyurethanes [38] M w eth * CMC * * γ cmc * * * length of the hydrophilic ethoxyl groups. [38] Their properties are listed in Table 1. Pyrene (Fluka, Germany) and diphenyl ketone (DPK, China) were used as supplied.…”

“…We have reported novel nonionic polyurethane surfactants containing a mono-tail and bi-head groups which can be used in a broad temperature range to solve issues that nonionic polyurethane surfactants can't be directly used in emulsion polymerization. [38] These polyurethanes have good emulsifying and solubilization capabilities which are related to the properties of the polyurethane solution. Hence, the miceller properties of these nonionic polyurethanes should be studied, i.e., the CMC, aggregation number, micropolarity, etc.…”

Physicochemical studies on micelle formation of amphiphilic polyurethane in aqueous solution

“…WPUs rely on the hydrophilic groups to maintain their dispersion in water. With the appropriate ratio of hydrophilic and lipophilic group of the PU chain, PU can exhibit amphiphilic property and a great of behavior like traditional low molecular weight surfactants [7][8][9][10][11][12]. The previous works almost focused on study of surface tension, emulsification and solubilization capability of amphiphilic polyurethanes, nevertheless, there are few studies related to the property of self-assembling polyurethane micelles and solubilization mechanism.…”

Synthesis and Properties of Novel Non-Ionic Polyurethane Dispersion Based on Hydroxylated Tung Oil and Alicyclic Isocyanates

“…This passage aims to synthesize a novel HTO-based NPUD used for macromolecule surfactant with conjugated double bonds. Compared with micromolecule surfactants, whose residues after emulsification may harm the polymer matrix, macromolecule surfactants have properties of perfect dispersity, film-forming ability, environmental friendliness, stability [8] [9] and, furthermore, the ability of forming polymer alloy by blending or crosslinking with the polymer matrix. And properties of those polymer alloys could be improved owing to the potential ability of double bond provided by tung oil.…”