Synthesis of Linear Piperazine/Polyether Functional Polysiloxane and Its Modification of Surface Properties on Cotton Fabrics

Abstract

In this work, silicone softener (PTSO-PEG) was synthesized, with piperazine terminated polydimethylsiloxane (PTSO) and epoxy terminated polyethylene glycol (EPEG) as raw materials. Chemical structure of PTSO-PEG was characterized by (1)H NMR, FTIR, GPC, and TGA. Its application on cotton fabrics was studied. Morphologies of silicone modified surfaces on cotton fabrics and silicon wafers were investigated by SEM and AFM, respectively. The morphology images indicated that PTSO-PEG treated surface was macroscopically smooth and microscopically rough. Performance properties of silicone treated cotton fabrics, including hydrophilicity, whiteness, and softness, were tested. The results showed that PTSO-PEG treated cotton fabrics expressed better whiteness and hydrophilicity than traditional amino silicone treated sample. The piperazine and hydrophilic polyether groups on PTSO-PEG molecules disturbed the continuous and orderly arrangement of Si-CH3 groups, giving the cotton a hydrophilic and rough surface. This work provided a cost-effective and environmental method to synthesize and apply high performance silicone softener.

Thermodynamic Analysis of Trisiloxane Surfactant Adsorption and Aggregation Processes

“…The obtained ∆G 0 ads values of TS-OE12 are presented in Table 2. As follows from this table, the ∆G 0 ads values calculated from Equation (11) are constant only in the range of surfactants concentrations corresponding to the unsaturated monolayer at the water-air interface and the ∆G 0 ads values decrease with increasing temperature. According to the thermodynamic rule ∆G 0 ads fulfils the relationship [36,40]:…”

“…Thanks to the presence of the Si-H bond, it is possible to attach all kinds of substituents, e.g. amino [1][2][3][4], epoxycarbo [5][6][7], aryl and methacrylic [8,9] or polyether [4,10,11] groups. Modification of polysiloxanes with organic groups provides a wide range of hybrid materials combining the properties of polysiloxanes (thermal resistance, oxidation resistance, gas permeability, low surface tension, excellent dielectric properties, physiological neutrality and moisture resistance) with those of organic functional groups.…”

Green Glucamine-Based Trisiloxane Surfactant: Surface Activity, Aggregate Behavior, and Superspreading on Hydrophobic Surfaces

“…Figure S1 shows the 1 H NMR and 13 C NMR spectra of the intermediate and product. In line A, the shifts of the epoxy ring were shown at g (δ:3.1) and h (δ:2.8, 2.6).…”

“…When N-methyl-Dglucamine was connected to the epoxy ring, a new signal of the epoxy ring disappeared and the −OH signal appeared at 4.6 in the upfield. 13 C shifts are shown in spectra C and D. All homologous chemical shifts are located at the corresponding positions.…”

“…Besides, a number of groups have reported the effects of configuration 9,10 and composition 11 on the properties of siloxane surfactants. 12,13 Although the aforementioned surfactants show some favorable performances in certain domains, they do not align with the strategy of eco-sustainable development. In particular, siloxane surfactants modified by polyether have been studied extensively.…”