Kraft lignin grafted with isopentenol polyoxyethylene ether and the dispersion performance

Zheng, Tao; Zhong, Dingming; Zheng, Dafeng; Bao, Fengli; Zheng, Jianmin; Qiu, Xueqing

doi:10.1016/j.ijbiomac.2019.10.122

Cited by 9 publications

(3 citation statements)

References 29 publications

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“…[ 32 ] More importantly, the uncharged PEG segments have no repulsion to prevent the aggregation of molecular chains in the TA solution. [ 33 , 34 ] The Video S1 , Supporting Information, shows that the PAA‐IPEG/TA coacervate hydrogel at neutral pH value is easily obtained. As seen in Figure 1 , the hydrogel is endowed by its large free catechol groups with the properties of wet adhesion, shape adaptability, self‐healing, and bioadhesion to adhere to moist wounds and provide long‐term protection against external forces and pathogenic bacteria.…”

Section: Introductionmentioning

confidence: 99%

Bioinspired Polyacrylic Acid‐Based Dressing: Wet Adhesive, Self‐Healing, and Multi‐Biofunctional Coacervate Hydrogel Accelerates Wound Healing

et al. 2023

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Polyacrylic acid (PAA) and its derivatives are commonly used as essential matrices in wound dressings, but their weak wet adhesion restricts the clinical application. To address this issue, a PAA‐based coacervate hydrogel with strong wet adhesion capability is fabricated through a facile mixture of PAA copolymers with isoprenyl oxy poly(ethylene glycol) ether and tannic acid (TA). The poly(ethylene glycol) segments on PAA prevent the electrostatic repulsion among the ionized carboxyl groups and absorbed TA to form coacervates. The absorbed TA provides solid adhesion to dry and wet substrates via multifarious interactions, which endows the coacervate with an adhesive strength to skin of 23.4 kPa and 70% adhesion underwater. This coacervate achieves desirable self‐healing and extensible properties suitable for frequently moving joints. These investigations prove that the coacervate has strong antibacterial activity, facilitates fibroblast migration, and modulates M1/M2 polarization of macrophages. In vivo hemorrhage experiments further confirm that the coacervate dramatically shortens the hemostatic time from hundreds to tens of seconds. In addition, full‐thickness skin defect experiments demonstrate that the coacervate achieves the best therapeutic effect by significantly promoting collagen deposition, angiogenesis, and epithelialization. These results demonstrate that a PAA‐based coacervate hydrogel is a promising wound dressing for medical translation.

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Section: Introductionmentioning

confidence: 99%

Bioinspired Polyacrylic Acid‐Based Dressing: Wet Adhesive, Self‐Healing, and Multi‐Biofunctional Coacervate Hydrogel Accelerates Wound Healing

et al. 2023

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“…The typical chemical shift peaks of 1.103–3.816 ppm corresponded to DMAM, AMPS, DMDAAC, NVP, and TPEG. The 1.680 ppm peak corresponded to the H chemical shift of C–CH 2 –CH 2 – in TPEG, and the characteristic chemical shift peak of −O–CH 2 –CH 2 –O in TPEG was observed at 3.638 ppm . The FTIR and 1 H NMR spectra demonstrated that the P-TPEG comb polymer was successfully synthesized.…”

Section: Resultsmentioning

confidence: 92%

“…Figure 1b shows the 37 The FTIR and 1 H NMR spectra demonstrated that the P-TPEG comb polymer was successfully synthesized.…”

Section: Resultsmentioning

confidence: 99%

Nanolaponite/Comb Polymer Composite as a Rheological Modifier for Water-Based Drilling Fluids

Yang

Ren

Sun

et al. 2023

ACS Appl. Nano Mater.

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During the drilling of deep/ultradeep wells, water-based drilling fluids (WBDFs) often experience harsh conditions of ultrahigh temperature and high salt. Ultrahigh temperatures and high salts cause rheological instability in drilling fluid, reducing its suspension and cutting-carrying capacity. In this study, a comb polymer, P-TPEG with isopentenol polyoxyethylene ether (TPEG) as the side chain, was prepared via free radical polymerization in an aqueous solution and then compounded with nanolaponite (LAP) to obtain a composite rheological modifier (LAP/P-TPEG). In situ Fourier transform infrared spectroscopy and thermogravimetric analysis showed that LAP/P-TPEG had an excellent thermal stability. The LAP/P-TPEG solution test showed a shear thinning behavior. The results demonstrate that LAP/P-TPEG can improve the rheology of WBDFs before and after aging at 240 °C and can resist 15 wt % NaCl. LAP/P-TPEG formed a strong adsorption with bentonite through hydrogen bonds and electrostatic interactions. LAP, P-TPEG, and bentonite formed a “reversible” “dual” spatial network structure in WBDFs, improving the rheology and the suspension, cutting-carrying, and wellbore-cleaning abilities of the drilling fluid under ultrahigh temperature and high salt.

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Effect of clay minerals on polycarboxylate superplasticizer and methods to improve the performance of concrete containing clay: a review

Li,

Duan,

Meng

et al. 2023

J Mater Sci

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Kraft lignin grafted with isopentenol polyoxyethylene ether and the dispersion performance

Cited by 9 publications

References 29 publications

Bioinspired Polyacrylic Acid‐Based Dressing: Wet Adhesive, Self‐Healing, and Multi‐Biofunctional Coacervate Hydrogel Accelerates Wound Healing

Bioinspired Polyacrylic Acid‐Based Dressing: Wet Adhesive, Self‐Healing, and Multi‐Biofunctional Coacervate Hydrogel Accelerates Wound Healing

Nanolaponite/Comb Polymer Composite as a Rheological Modifier for Water-Based Drilling Fluids

Effect of clay minerals on polycarboxylate superplasticizer and methods to improve the performance of concrete containing clay: a review

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