The Synthesis of Nonionic Hyperbranched Organosilicone Surfactant and Characterization of Its Wetting Ability

Jie Liu,Fei Fei Zhang,Ni Zhang,Ying Hu Song,Kun Lv,Yan Chun Li

doi:10.3390/coatings11010032

Abstract

In this research, the epoxy silicone oil and self-made hydroxyl-terminated hyperbranched polymer (HBP-OH) were used to synthesis the nonionic hyperbranched organosilicone surfactant (NHSi). The molar rate of hydroxyl groups of HBP-OH and epoxy groups of epoxy silicon oil (n-OH: n-epoxy) was adjusted from 5:1~60:1 to prepare a series of NHSi. The Gel Permeation Chromatography (GPC), Fourier Transform Infrared Spectroscopy (FT-IR), contact angle measuring instrument, surface tensiometer and Scanning Electron Microscope (SEM) were employed to characterize the structure and property of HBP-OH and NHSi. GPC analysis indicated that the Mn of HBP-OH was 340.5. FT-IR analysis showed that with the increase of molar rate of n-OH:n-epoxy, the peak intensity of –OH increased. The prepared NHSi was then used to prepare the water solution. The lowest surface tension of NHSi solution was 24.71 mN·m−1 when the n-OH:n-epoxy was 30:1 in the preparation process. The minimum water contact angle of waterborne polyurethane (WPU) emulsion by adding 2% of NHSi was 14.85° on the surface of glass. The wetting experiments showed that the NHSi has good wetting ability to fixed sea-island superfine fiber synthetic material.

Highlights

A surfactant is a kind of molecule containing a hydrophilic segment and hydrophobic segment [1]
Nonionic hyperbranched organosilicon surfactants were prepared by using HBP‐OH
Ring and epoxy silicone oil as raw materials and the boron trifluoride ether as the opening reactions involved in the study was carried out at 110~130 °C for 6catalyst

Summary

Introduction

A surfactant is a kind of molecule containing a hydrophilic segment and hydrophobic segment [1]. The adsorption of a surfactant on the solution surface, oil–water interface, or interface state and affect the interfacial properties, resulting in a series of important phenomena in application. Adding a small amount of surfactant into the solvent or solution can significantly reduce the surface or interfacial tension of the solution and make the surface or interface state of the system change obviously. The surfactant is widely used in textile, cosmetics, leather manufacture, synthetic material, and rubber industry because of its good wetting, dispersion, emulsion, permeation, and solubilizing abilities. Wetting is the process of replacement of air by solution on the surface of material. A wetting agent is a kind of auxiliary which can increase this replacement ability [2,3,4]. Under the strategy of sustainable development in the whole world, the waterborne polyurethane (WPU) is gradually substituting the application of solvent-type polyurethane due to the unpleasant odor of dimethyl formamide (DMF) existed in the solvent-type polyurethane [5]

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Conclusion