Unique thermo-induced sequential gel-Sol-gel transition of responsive multiblock copolymer-based hydrogels

Jinming Hu; Zhishen Ge; Yueming Zhou; Yanfeng Zhang; Shiyong Liu

doi:10.1021/ma100813m

Unique thermo-induced sequential gel-Sol-gel transition of responsive multiblock copolymer-based hydrogels

Jinming Hu, Zhishen Ge, Yueming Zhou, Yanfeng Zhang, Shiyong Liu

Research output: Contribution to journal › Article › Research › peer-review

48 Citations (Scopus)

Abstract

The relative dominance of hydrophobic and electrostatic supramolecular interactions in aqueous solutions of responsive multiblock copolymers was thermoregulated. pH responsive poly(4-vinylpyridine) (P4VP) and thermosensitive random copolymer of N-isopropylacrylamide (NIPAM) and N,N-dimethylacrylamide (DMA), P(NIPAM-co-DMA), were chosen as the two chain sequences alternately arranged in m-P-(NIPAM-co-DMA)-b-P4VP multiblock copolymers. A comparison to the aggregation properties of the multiblock in dilute aqueous solution shows that at 5?C, ionic complexation between protonated P4VP and NDSNa is responsible for the physical gelation, which leads to insolubility of P4VP sequences. Cooling from the gel state at 55?C to 5?C realize sequential gel-sol-gel transition in the reverse order, as compared to that observed in the heating process.

Original language	English
Pages (from-to)	5184 - 5187
Number of pages	4
Journal	Macromolecules
Volume	43
Issue number	12
DOIs	https://doi.org/10.1021/ma100813m
Publication status	Published - 2010
Externally published	Yes

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title = "Unique thermo-induced sequential gel-Sol-gel transition of responsive multiblock copolymer-based hydrogels",

abstract = "The relative dominance of hydrophobic and electrostatic supramolecular interactions in aqueous solutions of responsive multiblock copolymers was thermoregulated. pH responsive poly(4-vinylpyridine) (P4VP) and thermosensitive random copolymer of N-isopropylacrylamide (NIPAM) and N,N-dimethylacrylamide (DMA), P(NIPAM-co-DMA), were chosen as the two chain sequences alternately arranged in m-P-(NIPAM-co-DMA)-b-P4VP multiblock copolymers. A comparison to the aggregation properties of the multiblock in dilute aqueous solution shows that at 5?C, ionic complexation between protonated P4VP and NDSNa is responsible for the physical gelation, which leads to insolubility of P4VP sequences. Cooling from the gel state at 55?C to 5?C realize sequential gel-sol-gel transition in the reverse order, as compared to that observed in the heating process.",

author = "Jinming Hu and Zhishen Ge and Yueming Zhou and Yanfeng Zhang and Shiyong Liu",

year = "2010",

doi = "10.1021/ma100813m",

language = "English",

volume = "43",

pages = "5184 -- 5187",

journal = "Macromolecules",

issn = "0024-9297",

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T1 - Unique thermo-induced sequential gel-Sol-gel transition of responsive multiblock copolymer-based hydrogels

AU - Hu, Jinming

AU - Ge, Zhishen

AU - Zhou, Yueming

AU - Zhang, Yanfeng

AU - Liu, Shiyong

PY - 2010

Y1 - 2010

N2 - The relative dominance of hydrophobic and electrostatic supramolecular interactions in aqueous solutions of responsive multiblock copolymers was thermoregulated. pH responsive poly(4-vinylpyridine) (P4VP) and thermosensitive random copolymer of N-isopropylacrylamide (NIPAM) and N,N-dimethylacrylamide (DMA), P(NIPAM-co-DMA), were chosen as the two chain sequences alternately arranged in m-P-(NIPAM-co-DMA)-b-P4VP multiblock copolymers. A comparison to the aggregation properties of the multiblock in dilute aqueous solution shows that at 5?C, ionic complexation between protonated P4VP and NDSNa is responsible for the physical gelation, which leads to insolubility of P4VP sequences. Cooling from the gel state at 55?C to 5?C realize sequential gel-sol-gel transition in the reverse order, as compared to that observed in the heating process.

AB - The relative dominance of hydrophobic and electrostatic supramolecular interactions in aqueous solutions of responsive multiblock copolymers was thermoregulated. pH responsive poly(4-vinylpyridine) (P4VP) and thermosensitive random copolymer of N-isopropylacrylamide (NIPAM) and N,N-dimethylacrylamide (DMA), P(NIPAM-co-DMA), were chosen as the two chain sequences alternately arranged in m-P-(NIPAM-co-DMA)-b-P4VP multiblock copolymers. A comparison to the aggregation properties of the multiblock in dilute aqueous solution shows that at 5?C, ionic complexation between protonated P4VP and NDSNa is responsible for the physical gelation, which leads to insolubility of P4VP sequences. Cooling from the gel state at 55?C to 5?C realize sequential gel-sol-gel transition in the reverse order, as compared to that observed in the heating process.

UR - http://pubs.acs.org/doi/pdfplus/10.1021/ma100813m

U2 - 10.1021/ma100813m

DO - 10.1021/ma100813m

M3 - Article

VL - 43

SP - 5184

EP - 5187

JO - Macromolecules

JF - Macromolecules

SN - 0024-9297

IS - 12

ER -

Unique thermo-induced sequential gel-Sol-gel transition of responsive multiblock copolymer-based hydrogels

Abstract

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