Dye-hybrid Polyphosphazene Particle Prepared by Acid-base Interaction and Its Emulsifying Performance

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Dye-hybrid Polyphosphazene Particle Prepared by Acid-base Interaction and Its Emulsifying Performance

Research Article | 更新时间：2021-01-26

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- Dye-hybrid Polyphosphazene Particle Prepared by Acid-base Interaction and Its Emulsifying Performance
- Acta Polymerica Sinica Vol. 0, Issue 5, Pages: 639-647(2018)
- 作者机构：
  
  江南大学合成与生物胶体教育部重点实验室化学与材料工程学院　无锡 214122
- 作者简介：
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2017.17200
  CLC：
- Published：2018-5，
  
  Received：25 July 2017，
  
  Revised：17 September 2017，
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Mi-mi Jiao, Wei Wei, Xin Jiang, Jing Luo, Ye Zhu, Xiao-ya Liu. Dye-hybrid Polyphosphazene Particle Prepared by Acid-base Interaction and Its Emulsifying Performance. [J]. Acta Polymerica Sinica 0(5):639-647(2018)
DOI：

Mi-mi Jiao, Wei Wei, Xin Jiang, Jing Luo, Ye Zhu, Xiao-ya Liu. Dye-hybrid Polyphosphazene Particle Prepared by Acid-base Interaction and Its Emulsifying Performance. [J]. Acta Polymerica Sinica 0(5):639-647(2018) DOI： 10.11777/j.issn1000-3304.2017.17200.

摘要

利用罗丹明B (RhB)通过酸碱相互作用对聚(环三膦腈-

co

-4

4′-二羟基二苯砜) (PZS)微粒进行表面改性，得到一种染料杂化的聚磷腈胶体粒子(PZS@RhB)，对其结构、形貌、亲-疏水性及pH响应性进行了表征；进一步以PZS@RhB微粒为颗粒乳化剂，研究了其乳化性能，并探讨了乳液的破乳条件及机理. 结果表明：PZS微粒表面吸附RhB后，疏水性增加，且RhB结构中的羧基赋予了微粒pH响应性；当水相中PZS@RhB微粒的质量浓度达到14 mg/mL时，可乳化甲苯形成较为细腻的W/O型乳液；乳液呈现出显著的pH响应性，当增加水相pH至强碱性(pH ≥ 10.11)时，乳液可发生相反转，由W/O型转变为O/W型；此外，通过向乳液中加入三乙胺，可有效破环PZS微粒与RhB之间的酸碱相互作用，从而方便实现乳液的破乳.

Abstract

The surface modification of colloidal particles using intermolecular weak interactions

such as electrostatic interaction

π

-

π

interaction

and acid-base interaction

could endow the particles with environmental stimulus responsiveness

and it is more convenient and mild compared with chemical approach. In this study

dye-hybrid polyphosphazene particles (PZS@RhB) was facilely prepared by surface modification of poly(cyclotriphosphazene-

co

-4

4′-sulfonyldiphenol) (PZS) particles with Rhodamine B (RhB)

an acidic organic dye

by acid-base interaction. The chemical structure

morphology

surface wettability and pH-responsiveness of PZS@RhB particles were characterized by Fourier transform infrared spectroscopy

UV-Vis absorption spectroscopy

scanning electron microscopy

water contact angle test

and conductivity measurement

respectively. The emulsifying performance of PZS@RhB particles as Pickering stabilizer was further investigated

and the demulsification conditions and mechanism were also discussed. The results showed that the hydrophobicity of PZS particles was enhanced after RhB was adsorbed. Meanwhile

PZS@RhB particles exhibited pH-responsiveness due to the introduction of carboxyl groups from RhB. PZS@RhB particles could well stabilize toluene-water system (1:1

by volume) to form fine water-in-oil Pickering emulsion

when the concentration of particles in aqueous phase increased to 14 mg/mL. The obtained emulsion showed remarkable pH-responsiveness

derived from PZS@RhBparticles. The stability and type of emulsion could be changed by adjusting pH of aqueous phase. When pH increased to 10.11

the surface of PZS@RhB particles was changed from hydrophobic to hydrophilic because of the continuous ionization of carboxyl groups

and thus the transition from W/O to O/W emulsion (phase inversion) took place. In addition

it was found that the demulsification of the emulsion was easily realized by adding a low amount of triethylamine

a stronger Lewis base compared to PZS

probably because the acid-base interaction established between PZS particles and RhB was disturbed

resulting in the desorption of RhB from the surface of PZS particles. Therefore

the surface wettability of the particles was changed

and the stability of the emulsion was destroyed. Considering above features

including pH-responsiveness

phase inversion behavior

and controllable emulsification

the emulsion stabilized by PZS@RhB particles has a great potential to be applied in various fields

such as biphasic catalysis and oil-water separation.

关键词

聚磷腈微粒酸碱相互作用pH响应Pickering乳液相反转破乳

Keywords

Polyphosphazene particlesAcid-base interactionspH-ResponsivenessPickering emulsionsPhase inversionDemulsification

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