Water Structure of PEG Solutions by Differential Scanning Calorimetry Measurements

Antonsen, K. Pickard; Hoffman, Allan S.

doi:10.1007/978-1-4899-0703-5_2

Cited by 62 publications

(57 citation statements)

References 20 publications

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“…They have found that PEG interacts with water and binds with water molecule, which creates a relatively large hydrated volume (Osterberg et al, 1995). Antonsen and Hoffman (1992) suggested that PEG was able to fold upon itself forming a "water-structure", which enabled it to bind with more water molecules between the fold lengths. The number o f water molecules attached per monomer unit is defined as hydration number (Kjellander and Florin, 1981).…”

Section: Use Of Additives To Suppress Inactivationmentioning

confidence: 99%

Laccase‐Catalyzed Removal of Diphenylamine from Synthetic Wastewater

Saha

Taylor

Bewtra

et al. 2008

Water Environment Research

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The priority pollutant lists of both the U.S. Environmental Protection Agency (U.S. EPA) and the European Union (EU) include diphenylamine (DPA), a contaminant found in wastewater of various industries. This work demonstrates the potential of using enzymatic treatment to remove DPA from buffered synthetic wastewater. This treatment method includes oxidative polymerization of DPA using laccase from Trametes villosa, followed by removal of those polymers via adsorptive micellar flocculation (AMF) using sodium lauryl sulfate (SDS) and alum. Researchers investigated the effects of pH, laccase concentration, molecular mass, and concentration of polyethylene glycol (PEG) in continuously stirred batch reactors to achieve 95% substrate conversion in three hours. Treatment of 0.19 mM DPA was best at pH 7 and an enzyme concentration from 0.0025 to 0.0075 standard activity unit/mL. Except for PEG 400, optimum enzyme and PEG concentrations decreased with an increase in PEG molecular mass. Optimum AMF conditions were pH 3.0 to 6.5, 200 mg/L of SDS, and 150 mg/L of alum.

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Section: Use Of Additives To Suppress Inactivationmentioning

confidence: 99%

Laccase‐Catalyzed Removal of Diphenylamine from Synthetic Wastewater

Saha

Taylor

Bewtra

et al. 2008

Water Environment Research

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“…In related studies, in the late 1980s the author's post-doc, Kris Antonsen, carried out a differential scanning calorimetric (DSC) study of PEG solutions as a function of the PEG MW. This work was published as a chapter in Milton Harris's book on PEG Chemistry [24]. As the PEG MW increased above around 1000, a separate peak appeared in the DSC endotherms, occurring below the frozen water melt peak.…”

Section: Statement Of Significancementioning

confidence: 95%

The early days of PEG and PEGylation (1970s–1990s)

Hoffman

2016

Acta Biomaterialia

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“…The reason may be as follows. It was reported 14 that three water molecules can combine on one unit of oxyethylene. Thus, the number of the combined water molecules increases because of the increase of oxyethylene unit length.…”

Section: Water Content Of the Terpolymermentioning

confidence: 99%

Synthesis of terpolymers having a phospholipid polar group and poly(oxyethylene) in the side chain and their protein adsorption–resistance properties

Oishi

Tanaka

Yamasaki

et al. 2002

J of Applied Polymer Sci

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Terpolymers having phospholipid polar groups were synthesized from 2-methacryloyloxyethyl phosphorylcholine (MPC), methacryloyl or acryloyl poly(oxyethylene) macromonomers (POEM) [(CH 2 CH 2 O) n (where n ϭ 2-23); PEOM(2), PEOM(23), ME(9), Ph(6)], and n-butyl methacrylate (BMA). The characteristics of these terpolymer membranes were investigated by water content (H) and X-ray photoelectron spectroscopy. The content of water in the terpolymer increased with increasing content of MPC and length of oxyethylene units. The membranes of terpolymers were found to adsorb bovine serum albumin much less than those of poly(methyl methacrylate) and poly(BMA). Even though the contents of MPC in the terpolymer were 5 to 25 mol %, the terpolymer depressed BSA adsorption more than poly(MPC-co-BMA) consisting of 29 mol % of MPC. The use of terpolymer with POEM can decrease the amount of MPC in the polymer.

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Water Structure of PEG Solutions by Differential Scanning Calorimetry Measurements

Cited by 62 publications

References 20 publications

Laccase‐Catalyzed Removal of Diphenylamine from Synthetic Wastewater

Laccase‐Catalyzed Removal of Diphenylamine from Synthetic Wastewater

The early days of PEG and PEGylation (1970s–1990s)

Synthesis of terpolymers having a phospholipid polar group and poly(oxyethylene) in the side chain and their protein adsorption–resistance properties

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