Synthesis of High Purity Mono‐Alkyl Phosphate Using Cyclic Polyphosphoric Acid

Qing-guo, YE; Yan, Shuyun

doi:10.1007/s11743-009-1153-3

Cited by 8 publications

(6 citation statements)

References 6 publications

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“…The 31 P NMR spectra were tested by silylating the samples with hexamethyldisilazane in CDCl 3 , unless otherwise stated. Hydrogen bromide–acetic acid solution was used for the titration of epoxide and an indicator method was used for the titration of acid content in PCO .…”

Section: Methodsmentioning

confidence: 99%

Improvement of the interfacial shear strength of poly(p‐phenylene benzobisoxazole) fiber/epoxy resin composite via a novel surface coating agent

et al. 2014

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Poly(p-phenylene benzobisoxazole) (PBO) fiber with a smooth surface exhibits limited interfacial interaction with resin matrix. One of the effective strategies to improve the adhesion between the fiber and resin matrix is through surface modification of the fiber. In this study, we have proposed a novel surface treatment agent based on phosphoester cross-linked castor oil (PCCO) for effective surface treatment of PBO fibers. The surface treatment agent was prepared by a simple cross-linking reaction between hydroxy phosphorylated castor oil (PCO) and epoxy resin, with alcohol as the solvent at 65 C. Once the PBO fiber was treated with this agent, the interfacial adhesion between the PBO fiber and the epoxy resin could then be improved. Systematic analyses suggest that the surface treatment with (PCO 1 epoxy)/alcohol solution improves the interaction of the PBO fiber with the epoxy resin matrix. The PCCO coated onto the surface of PBO fiber acts as a coupling agent, improving the interfacial shear strength (IFSS) of the PBO fiber/epoxy resin composite. Results indicate a 156% increase in IFSS without compromising the mechanical properties of the fiber.

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Section: Methodsmentioning

confidence: 99%

Improvement of the interfacial shear strength of poly(p‐phenylene benzobisoxazole) fiber/epoxy resin composite via a novel surface coating agent

et al. 2014

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“…Chemical shifts were referred to the solvent peak (δ 7.26 for the residue peak of CDCl 3 and 4.79 for D 2 O). Hydrogen bromide/acetic acid solution was used for titratation of epoxide, and the indicator method was used for the titrations of P-PEG-P …”

Section: Methodsmentioning

confidence: 99%

Cross-Linked PEG via Degradable Phosphate Ester Bond: Synthesis, Water-Swelling, and Application as Drug Carrier

Liu¹,

Wang²,

Li³

et al. 2011

Biomacromolecules

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A new series of degradable and water-swellable cross-linked PEG phosphoester polymers (CPPs) based on a facile cross-linked reaction between diphosphoesters of polyethylene glycol (P-PEG-P) and diglycidyl ether of polyethylene glycol (E-PEG-E) has been prepared and characterized. The molecular weights and ratios of the prepolymers played an important role for the properties of CPPs polymers, such as mechanical property, swelling, and degradation rates. In the curing process, the glycidyl ether was consumed by both hydroxyl of the phosphoester (P-OH) and hydroxyl generated from the opened glycidyl ethers (C-OH) with the presence of acid, which generated degradable phosphate esters as cross-linked points and ether bonds as the short branches, respectively. Drug entrapment and release test and biological cytotoxicity studies in vitro suggested that the polymers and generated hydrogels have great potential applications in drug delivery system and biological materials.

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“…The double indicator analysis method (Lin et al, ; Tian and Dong, ; Ye and Yan, ) was adopted to determine the content of MAP, DAP, and H 3 PO 4 in alkyl phosphates. Two samples of 0.5 g were placed in the two conical flasks of 250 mL, and n‐ propanol of 45 mL was added into the conical flask.…”

Section: Methodsmentioning

confidence: 99%

“…Until now, the preparation of alkyl phosphates has been mainly focused on low‐carbon alkyl phosphates (Clarke and Lyons, ; Davis, ; Du and Zhou, ; Hansell and Faulkner, ; He et al, ; Jiang, ; Lee, ; Li et al, ; Obata and Mukaiyama, ; Okabe et al, ; Okamato, ; Qiang et al, ; Ren et al, ; Thilo and Sauer, ; Wang, ; Wu et al, ; Xia et al, ; Ye and Yan, ), and little attention has been paid to the preparation of alkyl phosphates with alkyl chain length above 18, since the reactions between high‐carbon alcohols and phosphorylating reagents are difficult without solvents to obtain the high‐carbon alkyl phosphates. He et al () prepared octadecyl phosphates by means of removing water from azeotropic solvents, and Xu et al () adopted the method of adding solvent to synthesize the high‐carbon alkyl phosphates from C18 to C22.…”

Section: Introductionmentioning

confidence: 99%

Solvent‐Free Synthesis of Surfactants of High‐Carbon Alkyl Phosphates Used for Cosmetics

Liu

Gao

et al. 2018

J Surfact & Detergents

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The solvent‐free synthesis of surfactants of high‐carbon alkyl phosphate esters (C = 18, 22) using the polyphosphoric acid method was studied in this work. Phosphoric acid (85 wt%) and phosphorus pentoxide were used to prepare a phosphorylation agent. The preparation conditions of octadecyl and docosyl phosphates were optimized. With the optimized synthesis conditions, the high‐carbon alkyl phosphates were prepared with high yield, and their performances were validated. The results indicate that the high‐carbon alkyl phosphates displayed good emulsifying ability and dispersion performance was compared with the other cosmetic surfactants.

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Synthesis of High Purity Mono‐Alkyl Phosphate Using Cyclic Polyphosphoric Acid

Cited by 8 publications

References 6 publications

Improvement of the interfacial shear strength of poly(p‐phenylene benzobisoxazole) fiber/epoxy resin composite via a novel surface coating agent

Improvement of the interfacial shear strength of poly(p‐phenylene benzobisoxazole) fiber/epoxy resin composite via a novel surface coating agent

Cross-Linked PEG via Degradable Phosphate Ester Bond: Synthesis, Water-Swelling, and Application as Drug Carrier

Solvent‐Free Synthesis of Surfactants of High‐Carbon Alkyl Phosphates Used for Cosmetics

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