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Tytuł:
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Hydrophilic modification of methylcellulose to obtain thermoviscosifying polymers without macro-phase separation.
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Autorzy:
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Wu D; Polymer Research Institute, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China.
Cheng J; Polymer Research Institute, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China.
Su X; Polymer Research Institute, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China. Electronic address: .
Feng Y; Polymer Research Institute, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China. Electronic address: .
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Źródło:
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Carbohydrate polymers [Carbohydr Polym] 2021 May 15; Vol. 260, pp. 117792. Date of Electronic Publication: 2021 Feb 14.
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Typ publikacji:
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Journal Article
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Język:
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English
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Imprint Name(s):
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Publication: <1992-> : Barking : Elsevier Applied Science Publishers
Original Publication: London [Eng.] : Applied Science Publishers, c1981-
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MeSH Terms:
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Methylcellulose/*chemistry
Polymers/*chemistry
Hydrophobic and Hydrophilic Interactions ; Rheology ; Temperature ; Viscosity
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Contributed Indexing:
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Keywords: Hydrophilic modification; Macro-phase separation; Methylcellulose; Thermogelation; Thermoviscosifying
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Substance Nomenclature:
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0 (Polymers)
9004-67-5 (Methylcellulose)
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Entry Date(s):
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Date Created: 20210313 Date Completed: 20210407 Latest Revision: 20210407
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Update Code:
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20240104
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DOI:
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10.1016/j.carbpol.2021.117792
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PMID:
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33712140
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Methylcellulose (MC) has received considerable attention because of its thermogelation behavior in aqueous solutions upon heating; however, the accompanied macro-phase separation results in demixing and detriment of thickening power. To alleviate this drawback, a novel family of hydrophilically modified methylcelluloses (HMMCs) was prepared by introducing acylamino, carboxyl, and amino groups onto MC side chains. Above association temperature (T ass ), MC solutions experienced obvious macro-phase separation and thermothinning phenomenon; on the contrary, HMMCs solutions exhibited thermo- and salt-thickening behaviors, and T ass could be adjusted from 44 °C to 87 °C by altering the nature of HMMCs or salt content in solutions. The mechanism to eliminate the macro-phase separation of HMMC stems from the balance between hydrophilicity and hydrophobicity. This work opens a new avenue for cellulose derivatives to sustain their thermoviscosifying ability and widen their applications in hostile environments.
(Copyright © 2021 Elsevier Ltd. All rights reserved.)
