The reaction of cellulose with hexamethylene diisocyanate

Gafurov, T.G.; Pilosov, M.Ya.; Adylov, A.; Mannanova, D.; Suvorova, Ye.V.; Tashpulatov, Yu. T.; Nikonovich, G. V.; Usmanov, Kh.U.

doi:10.1016/0032-3950(70)90430-2

Cited by 4 publications

(5 citation statements)

References 3 publications

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“…The NFCA was kept immersed in solvent during filtration to avoid drying. The isocyanate functionalization method described by Gafurov et al was used for NCC (Scheme b) . NCC was solvent exchanged to DMF in the same manner described above for NFC.…”

Section: Methodsmentioning

confidence: 99%

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Vat Photopolymerization of Nanocellulose-Reinforced Vegetable Oil-Based Resins: Synergy in Morphology and Functionalization

Jurinovs

Barkāne

Platnieks

et al. 2023

ACS Appl. Polym. Mater.

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With the advancement of additive manufacturing (AM) and the mass adoption of 3D printing technology, it is essential to shift focus to environmentally and economically sustainable materials. As the utilization of renewable feedstocks is quite limited in this context, the utilization of more bio-based raw materials in the ongoing development of AM represents an essential means of achieving this shift. In this work, vat photopolymerization 3D printing has been used to process vegetable oil-based (VO) resins with an ultralow concentration of 0.07 vol % nanocellulose fibrils (NFC) and crystals (NCC). The developed nanocellulose containing bio-based vat photopolymerization resin shows excellent shelf stability, enabling high-resolution printing. Compatibilization of the nanocellulose with the polymer matrix was achieved through the introduction of isocyanate or acrylate groups via reactions of acryloyl chloride (AC) and hexamethylene diisocyanate (HMDI) with cellulose surface hydroxyls. Surface functionalization results in ∼20–30% increases in interfacial adhesion and stress transfer, yielding significant improvements in mechanical performance (4× higher toughness, 2.4× higher tensile strength, and 2× higher tensile strain) in 3D-printed specimens. Fourier-transformation infrared (FTIR) spectroscopy complemented by solid-state nuclear magnetic resonance (NMR) techniques enabled a more detailed study of the chemical structure of these materials as well. Tensile performance comparison with literature data on VO-based natural fiber-reinforced resins showed that this work brought bio-based resins one step closer to competing with petroleum-based resins. The prepared VO/nanocellulose resins are promising candidates for high-performance bio-based resins derived from completely renewable feedstocks.

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Section: Methodsmentioning

confidence: 99%

“…The isocyanate functionalization method described by Gafurov et al was used for NCC (Scheme 1b). 30 NCC was solvent exchanged to DMF in the same manner described above for NFC. Next, NCC (1 g) was suspended in a mixture of DMF (25 g) and HMDI (2.5 g).…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Vat Photopolymerization of Nanocellulose-Reinforced Vegetable Oil-Based Resins: Synergy in Morphology and Functionalization

Jurinovs

Barkāne

Platnieks

et al. 2023

ACS Appl. Polym. Mater.

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“…Wahrend [3,5,7,8,10,[12][13][14][17][18][19][20][21][22] undbei Isocyanat-OberschuD -Allophanate [lo] erhalten. Die Verwendung von Diisocyanaten fuhrt nach Ansicht der meisten Autoren [6,10,15,23,241 zu einer Vernetzung der Celluloseketten, wahrend andere die Quellungsverringerung auch auf reine Einlagerungseffckte zuruckfuhren [16]. [6-8, 10, 15, 30-321 erfolgt. In Tabelle 1 wurden die in der verfugbaren Literatur vorhandenen quantitativen Angaben uber die Massezunahme bzw.…”

Section: Umsetzung Yon Celluloseunclassified

“…isocyanatgruppenhaltigen Prapolymeren moglich. Rei Anwendung von Diisocyanaten wird eine Verbesserung der Knitterfestigkeit[15], der Resistenz gegen Mikroorganismen[6, 341 und der Formsteifigkeit von Karton [4] beobachtet, Mit dem gleichen Isocyanat unter milden Bedingungen behandelter nasser Zellstoff ergibt Papiere mit schlechteren Festiglceitseigenschaften, wahrend fur Wellpappen vorgesehenes Deckschichtpapier unter etwas harteren Bedingungen eine Eigenschaftsverbesserung erfahrt [36]. aus der Tabelle laibt sich zusammenfassend folgendes ableiten: -Wird trockene Cellulose mit Isocyanaten ohne Losungsmittel und Katalysatoren erwarmt, so erfolgt praktisch keine Reaktion.…”

unclassified

Über die Umsetzung von Cellulose und Lignin mit Isocyanaten bzw. isocyanatgruppenhaltigen Präpolymeren

Reichelt

Poller

1981

Acta Polymerica

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In der vorliegenden Arbeit wird uber den Stand der Untersuchungen zum Reaktionsverhalten von Cellulose und Lignin bei der Umsetzung rnit Isocyanaten bzw. isocyanatgruppenhaltigen Prapolymeren berichtet. AuDerdem werden die durch die Modifizierung erreichten Eigenschaftsveranderungen sowie potentielle Anwendungsbereiche der Produkte besprochen. 0 peanyusx yemioJcoaw u fiuenuna c uaoyuanammu uau n p e n o m w e p w u , codepmaquntu uaoyuanamnm zpynna, ~PEIBOARTCH Ramme o COCTOHHHEI pa6OT B 06JIaCTEi noseAeHm qennmno3~ EI mrHma npm peaHqmx c m o q~a~a -T a l i UJIH IIpeIIOJIHMepaMEi, COAepXaIQFiMEi El8OqEiaHaTHbIe rpyIIIIbI. KpOMe TOrO PaCCMaTphIBaIOTCH Ei3MeHeHEiR CBO~CTB BTHX MaTepHanOB B pe3JVIbTaTe MOAEi$HK~EIH, a TaKme B08MOmHbIe o6nacw UpHMeHeHEiH MO,I(EII$EiqHPO-BEIHHMX maTepHanoB. The reaction of cellulose and lignin with isoyanates and prepolymers containing isocyanate groupsThe investigations on the reaction of cellulose and lignin with isocyanates and prepolymers containing isocyanate groups are reviewed. Further the changes in properties caused by modification and the fields of possible application of the products are described.

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“…The isocyanate functionalization method described by Gafurov et al was used for pC [78]. pC was solvent exchanged to DMF in the same manner as described above for pF.…”

Section: Functionalization Of Nanocellulosementioning

confidence: 99%

Photo-curable Vegetable Oil-based Acrylate Resins with Lignocellulose Components

Barkāne

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Acrylic epoxy soybean oil (AESO) is plant oil-based acrylic resin useful in various applications, including bio-based coatings, adhesives, and composite manufacturing. Meanwhile, most 3D printing resins are petroleum-based. Nanocellulose enhances polymer composites but faces challenges such as agglomeration. This study explores various compositions of AESO-based resins with lignocellulose and nanocellulose surface functionalization to improve compatibility. The Thesis comprises five sections based on eight original publications, focusing on resin development, nanocellulose reinforcement, and compatibility improvement.

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The reaction of cellulose with hexamethylene diisocyanate

Cited by 4 publications

References 3 publications

Vat Photopolymerization of Nanocellulose-Reinforced Vegetable Oil-Based Resins: Synergy in Morphology and Functionalization

Vat Photopolymerization of Nanocellulose-Reinforced Vegetable Oil-Based Resins: Synergy in Morphology and Functionalization

Über die Umsetzung von Cellulose und Lignin mit Isocyanaten bzw. isocyanatgruppenhaltigen Präpolymeren

Photo-curable Vegetable Oil-based Acrylate Resins with Lignocellulose Components

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