Crack-resistant melamine/formaldehyde-impregnated paper-decorated panels using blocked isocyanates as a temperature-responsive crosslinker

Feng, Yun; Qu, Wenzhong; Wu, Yuzhang; Zhang, Jingpeng; Peng, Limin

doi:10.1016/j.porgcoat.2022.107211

Cited by 4 publications

(3 citation statements)

References 37 publications

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“…Zhao et al 33 attached a hyperbranched polymer (ECO) with a long hydrocarbon chain to the cellulose acetate surface by using blocked isocyanate as a cross-linking agent and made a waterproof and breathable membrane with high adhesion and durability. Feng et al 34 used hexamethylene diisocyanate trimer blocked by methyl ethyl ketoxime as a temperature-responsive cross-linking agent to blend with melamine-formaldehyde resin to prepare the impregnated paper. It was found that the ultimate tensile stress and elongation at break of modified impregnated paper increased by 97.70 and 86.25%, respectively.…”

Section: Introductionmentioning

confidence: 99%

Cyclodextrin-Based Isocyanate Functional Chain Extender and Its Application in Poly(butylene adipate-co-terephthalate)-Based Agricultural Materials

Han,

Fan,

Jiang

et al. 2024

ACS Appl. Polym. Mater.

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Replacing traditional plastics with biodegradable materials, such as poly(butylene adipate-co-terephthalate) (PBAT), is a reliable way to avoid farmland environmental pollution. However, the physical and mechanical properties of PBAT still have much to improve. Adding chain extenders to modify PBAT is one of the primary means. So far, the main chain extenders used are epoxy, anhydride, oxazoline, and isocyanate. In this paper, a blocked isocyanate chain extender with biological cyclodextrin as the skeleton material was designed and prepared(B3H35). When it was added to PBAT for melt blending at high temperature, the active isocyanate groups released by its deblocking reaction wound reacted with the terminal hydroxyl groups or carboxylic acid groups of PBAT to extend the molecular chain of PBAT, and then, a three-dimensional network was constructed based on dynamic hydrogen bonding, molecular entanglement, and physical cross-linking. As a result, the strength and toughness of PBAT improved simultaneously. Compared with pure PBAT, the tensile strength, elongation at break, and toughness of PBAT/B3H35 (2 wt %) increased by 17.7, 8.1, and 31.6%, respectively. In addition, 3,5-dimethylpyrazole, used as a blocking agent in this paper, is also released by deblocking during melt blending and endows PBAT/B3H35 with an excellent nitrification inhibition effect in agricultural soil. The experimental results show that the nitrification inhibition rate of the PBAT/B3H35 (3 wt %) reaches 80.64% after 35 days of landfill, significantly improving the utilization rate of the nitrogen fertilizer, thus reducing greenhouse gas emissions and environmental pollution. Overall, this work provides an idea and direction for designing and preparing functional chain extenders with simultaneous enhancement and toughening effects and nitrification inhibition functions for agricultural materials.

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Section: Introductionmentioning

confidence: 99%

Cyclodextrin-Based Isocyanate Functional Chain Extender and Its Application in Poly(butylene adipate-co-terephthalate)-Based Agricultural Materials

Han,

Fan,

Jiang

et al. 2024

ACS Appl. Polym. Mater.

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“…[39,40] Amino resins, exemplified by Melamine-Formaldehyde (MF) and Urea-Formaldehyde (UF), have attracted interest due to their highly cross-linked internal structures and their ability to facilitate crosslinking in the production of fluorescent materials. [41][42][43] In this study, a novel fluorescent oxygen sensor termed Ruthenium-embedded Oxygen Nano Polymeric Sensor (Ru-ONPS), synthesized via the sol-gel method [44,45] and comprehensively evaluates the Ru-ONPS against established benchmarks, including the commercial NanO 2 probe [46] and FNOP, [47] to highlight its distinctive attributes. The Ru-ONPS exhibits exceptional properties that make it highly suitable for use as a fluorescent oxygen sensor.…”

Section: Introductionmentioning

confidence: 99%

[Ru(dpp)₃]Cl₂‐Embedded Oxygen Nano Polymeric Sensors: A Promising Tool for Monitoring Intracellular and Intratumoral Oxygen Gradients with High Quantum Yield and Long Lifetime

Kumar,

Goudar,

Nahak

et al. 2023

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Unraveling the intricacies between oxygen dynamics and cellular processes in the tumor microenvironment (TME) hinges upon precise monitoring of intracellular and intratumoral oxygen levels, which holds paramount significance. The majority of these reported oxygen nanoprobes suffer compromised lifetime and quantum yield when exposed to the robust ROS activities prevalent in TME, limiting their prolonged in vitro usability. Herein, the ruthenium‐embedded oxygen nano polymeric sensor (Ru‐ONPS) is proposed for precise oxygen gradient monitoring within the cellular environment and TME. Ru‐ONPS (≈64±7 nm) incorporates [Ru(dpp)3]Cl2 dye into F‐127 and crosslinks it with urea and paraformaldehyde, ensuring a prolonged lifetime (5.4 µs), high quantum yield (66.65 ± 2.43% in N2 and 49.80 ± 3.14% in O2), superior photostability (>30 min), and excellent stability in diverse environmental conditions. Based on the Stern–Volmer plot, the Ru‐ONPS shows complete linearity for a wide dynamic range (0–23 mg L−1), with a detection limit of 10 µg mL−1. Confocal imaging reveals Ru‐ONPS cellular uptake and intratumoral distribution. After 72 h, HCT‐8 cells show 5.20±1.03% oxygen levels, while NIH3T3 cells have 7.07±1.90%. Co‐culture spheroids display declining oxygen levels of 17.90±0.88%, 10.90±0.88%, and 5.10±1.18%, at 48, 120, and 216 h, respectively. Ru‐ONPS advances cellular oxygen measurement and facilitates hypoxia‐dependent metastatic research and therapeutic target identification.

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“…Impregnated paper is a type of environmentally friendly decorative paper that is produced by base paper impregnation with appropriate resins and additives, followed with/without printing processing and then surface coating [1]. The impregnated paper offers competitive resistance to environmental corrosion and ultimate customization solutions, while avoiding the plundering of precious woods [2]. Therefore, impregnated paper production received increasing attention in the decoration industry worldwide, as evidenced by the increased market demand and academic publications.…”

Section: Introductionmentioning

confidence: 99%

Bio-Based Impregnated Resin Preparation for Aldehyde-Free Decorative Paper Production

2023

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With the growing concern for environmental protection and personal health, utilizing bio-based impregnated resin has become a sustainable approach for producing aldehyde-free decorative paper and in-house decorations. Our current work focuses on the preparation of an aldehyde-free resin (AFR) by formulating quaternized cellulose nanofibrils (QCNFs, Ave. width 10 ± 3 nm, Ave. length of and >500 nm) with aqueous acrylate emulsion. We analyzed the synthesized QCNFs, acrylate emulsion, and AFR by using various methods, including FTIR, XPS, XRD, TGA/DTG, and rheometer, to evaluate their applicability for impregnated paper processing. At a low coating weight of 4.0 g/m2, a 30.8% increase and 4.9-times increase in tensile strength and contact angle were detected, respectively. Meanwhile, the free aldehyde emission from the AFR-coated paper was found to be 0.1 mg/L even at a high coating weight of 18.8 g/m2, which is far below the E0 level requirement in the JAS 234:2003 criteria. Therefore, the surface coating of the decorative base paper was found to be competitive in covering the porous structure of the paper, reinforcing its mechanical strength, and providing high water resistance. Moreover, the lower free aldehyde emission from the AFR-coated paper ensures its safety and potential application in house decoration products.

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Crack-resistant melamine/formaldehyde-impregnated paper-decorated panels using blocked isocyanates as a temperature-responsive crosslinker

Cited by 4 publications

References 37 publications

Cyclodextrin-Based Isocyanate Functional Chain Extender and Its Application in Poly(butylene adipate-co-terephthalate)-Based Agricultural Materials

Cyclodextrin-Based Isocyanate Functional Chain Extender and Its Application in Poly(butylene adipate-co-terephthalate)-Based Agricultural Materials

[Ru(dpp)₃]Cl₂‐Embedded Oxygen Nano Polymeric Sensors: A Promising Tool for Monitoring Intracellular and Intratumoral Oxygen Gradients with High Quantum Yield and Long Lifetime

Bio-Based Impregnated Resin Preparation for Aldehyde-Free Decorative Paper Production

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Crack-resistant melamine/formaldehyde-impregnated paper-decorated panels using blocked isocyanates as a temperature-responsive crosslinker

Cited by 4 publications

References 37 publications

Cyclodextrin-Based Isocyanate Functional Chain Extender and Its Application in Poly(butylene adipate-co-terephthalate)-Based Agricultural Materials

Cyclodextrin-Based Isocyanate Functional Chain Extender and Its Application in Poly(butylene adipate-co-terephthalate)-Based Agricultural Materials

[Ru(dpp)3]Cl2‐Embedded Oxygen Nano Polymeric Sensors: A Promising Tool for Monitoring Intracellular and Intratumoral Oxygen Gradients with High Quantum Yield and Long Lifetime

Bio-Based Impregnated Resin Preparation for Aldehyde-Free Decorative Paper Production

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Product

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[Ru(dpp)₃]Cl₂‐Embedded Oxygen Nano Polymeric Sensors: A Promising Tool for Monitoring Intracellular and Intratumoral Oxygen Gradients with High Quantum Yield and Long Lifetime