Sulfonated Kraft lignin addition in urea–formaldehyde resin

Natarelli, Caio Vinícius Lima; Lemos, Ana Carolina Cortez; Assis, Maíra Reis de; Tonoli, Gustavo Henrique Denzin; Trugilho, Paulo Fernando; Marconcini, J. M.; Oliveira, Juliano Elvis de

doi:10.1007/s10973-019-08075-1

Cited by 20 publications

(15 citation statements)

References 36 publications

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“…For example, the thermal stability of urea-formaldehyde resin can be improved by adding sulfonated kraft lignin. Sulfonated kraft lignin addition also helps reduce the amount of formaldehyde release, significantly improving the performance of adhesive [ 41 ]; lignosulfonate/PLA composites can be better used in 3D printing technology or public products [ 42 ].…”

Section: Lignin/pla Composite Materialsmentioning

confidence: 99%

A Review: Research Progress in Modification of Poly (Lactic Acid) by Lignin and Cellulose

et al. 2021

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With the depletion of petroleum energy, the possibility of prices of petroleum-based materials increasing, and increased environmental awareness, biodegradable materials as a kind of green alternative have attracted more and more research attention. In this context, poly (lactic acid) has shown a unique combination of properties such as nontoxicity, biodegradability, biocompatibility, and good workability. However, examples of its known drawbacks include poor tensile strength, low elongation at break, poor thermal properties, and low crystallization rate. Lignocellulosic materials such as lignin and cellulose have excellent biodegradability and mechanical properties. Compounding such biomass components with poly (lactic acid) is expected to prepare green composite materials with improved properties of poly (lactic acid). This paper is aimed at summarizing the research progress of modification of poly (lactic acid) with lignin and cellulose made in in recent years, with emphasis on effects of lignin and cellulose on mechanical properties, thermal stability and crystallinity on poly (lactic acid) composite materials. Development of poly (lactic acid) composite materials in this respect is forecasted.

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Section: Lignin/pla Composite Materialsmentioning

confidence: 99%

A Review: Research Progress in Modification of Poly (Lactic Acid) by Lignin and Cellulose

et al. 2021

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“…The kinetic analysis was performed through the implementation of non-isothermal methods 33,34 to verify the effect of tGNS addition on the kinetic parameters so as to understand the thermal behavior of the nanocomposites. From the TGA thermograms, the degree of conversion a was calculated as shown below (equation ( 1)):…”

Section: Theoretical Backgroundmentioning

confidence: 99%

An insight into thermal stability and decomposition kinetics of polybenzoxazine plasma treated graphene nanocomposites

Karbalaei-Bagher

Ahmadi

Nazockdast

2021

Polymers and Polymer Composites

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This research was targeted to investigate the effect of oxygen plasma treated graphene nanosheets (tGNSs) on the thermal stability of benzoxazine resin and to have a further and deeper mechanistic understanding of thermal decomposition kinetics of such nanocomposites in 0.5, 1 and 3 wt% of tGNS. The samples were prepared as reported in our previous study. The quality of dispersion of tGNSs within benzoxazine was investigated by X-Ray diffraction (XRD) and scanning electron microscopy (SEM) technique. Also, to ensure the complete curing of samples the differential scanning calorimetry (DSC) analysis was performed. Using thermogravimetric analysis (TGA), it was found that the addition of tGNS improved the char yield and thermal stability parameter of benzoxazine nanocomposites and this improvement was more prominent at 1% and higher amount of nanoparticles. Moreover, the first stage of thermal degradation kinetic of benzoxazine was disappeared above 1 wt% of tGNS. The samples were kinetically analyzed through Kissinger, Flynn-Wall-Ozawa and Friedman and Coats-Redfern method. It was revealed that the overall activation energy was enhanced from 168 to 224 kJ mol−1 and 275 to 420 kJ mol−1 for the second and third stage of degradation using 1 and 3 wt% of tGNS.

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“…Technical lignin can be defined as a form of lignin isolated after a series of biomass processing stages. Types of technical lignin vary mainly in molecular weight and structure, essentially determining the routes for lignin valorization and application (Hermiati et al 2017;Natarelli et al 2019). Pretreatment of lignocellulosic biomass is a stage that cost many and greatly affects the overall cost of bioethanol production (Zhang et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Utilization of Lignin from the Waste of Bioethanol Production as a Mortar Additive

Falah

Triastuti

Fatriasari

et al. 2020

JSL

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Lignin is the second most abundant biopolymer, exceeded only by cellulose, and comprises 15-25% of the dry weight of woody plants, with around 285,000 tons/year of production capacity globally. This study aims to utilize the lignin obtained from the waste of bioethanol production from oil palm empty fruit bunches (OPEFB) as a mortar additive. The use of mortar as a material for road construction is increasing, but its long time hardening is causing problems such as traffic jams. Lignin can be used as an additive to shorten the hardening time of mortar. Lignin was isolated at various NaOH concentrations and temperatures of OPEFB pretreatment for bioethanol production. The workability of the slump and compressive strength of mortars generated were further tested. Lignin from OPEFB can be used as a water reducer in the mortar with improved workability as much as 24.4% compared to controls. The addition of lignin could also increase the compressive strength at the mortar age of 7 and 28 days compared to the commercial lignosulfonate and control on the various water-cement ratios. The setting time of mortar with the lignin addition increased rapidly, reaching up to 80% at the 7 days, indicating that curing time is getting shorter. The most remarkable improvement of compressive strength with suitable workability and high-quality concrete was reached by 1% lignin addition and 0.45 water-cement ratio with compressive strength 38.81 N/mm2 at 28 days.Keywords: compressive strength, lignin, mortar, OPEFB, water reducer

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Sulfonated Kraft lignin addition in urea–formaldehyde resin

Cited by 20 publications

References 36 publications

A Review: Research Progress in Modification of Poly (Lactic Acid) by Lignin and Cellulose

A Review: Research Progress in Modification of Poly (Lactic Acid) by Lignin and Cellulose

An insight into thermal stability and decomposition kinetics of polybenzoxazine plasma treated graphene nanocomposites

Utilization of Lignin from the Waste of Bioethanol Production as a Mortar Additive

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