Synthesis and mechanical properties of bio-sourced polyurethane adhesives obtained from castor oil and MDI-modified cellulose acetate: Influence of cellulose acetate modification

Tenorio‐Alfonso, Adrián; Sánchez, M. Carmen; Franco, J.M.

doi:10.1016/j.ijadhadh.2019.102404

Cited by 50 publications

(40 citation statements)

References 62 publications

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“…The thermal degradation profile of the COPUFs is presented with thermal gravimetry analysis (TGA) and its derivative (DTGA) curves, as can be observed in Figure 6. The thermal characteristic of PU can be identified through its typical four stages of degradation, as reported by Tenorio-Alfonso, Sánchez, and Franco (2019) [17]. The presence of a hard segment in the PU-urea system can be identified by the first two stages of thermal degradation (W 1-2 ) at 270-414 • C, which are comparable with the previous reports [17,18,35].…”

Section: Thermal Degradation Profilesupporting

confidence: 87%

“…The four COPUFs had a similar thermal characteristic, observed from the temperature of the indicated DTGA peaks, with Tonset at 241-252 °C and Tmax at 363-373 °C. Slight differences of those temperature points may be ascribed to the reactive isocyanate leftover [17], as can also be seen in the FTIR analysis. Due to this effect of the excessive isocyanate, it was also difficult to determine and to compare the thermal stability of the final material.…”

Section: Thermal Degradation Profilementioning

confidence: 63%

“…The thermal characteristic of PU can be identified through its typical four stages of degradation, as reported by Tenorio-Alfonso, Sánchez, and Franco (2019) [17]. The presence of a hard segment in the PU-urea system can be identified by the first two stages of thermal degradation (W 1-2 ) at 270-414 • C, which are comparable with the previous reports [17,18,35]. The urea linkage originated from a further reaction of isocyanate and amine, resulting from isocyanate and water reaction [19].…”

Section: Thermal Degradation Profilementioning

confidence: 87%

“…Led by the rise of environmental concern, a new trend in PU research has been shifted to the use of bio-polyol resources. Lignin, starch, cellulose, chitosan, and vegetable oils (including castor oil) are some examples of many bio-polyols that have been used by researchers in PU synthesis for multiple applications in either pharmacy, building construction, packaging, agriculture, or other fields [16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

“…This material can appear in an open or closed cell structure with a wide range of rigidity (rigid, semirigid, and flexible foam) [19]. Hence, PUF has been noticeable for its high applicability as a thermal insulator [16], adhesive [17], and fertilizer release controller [21], and many others. In this research, however, we will employ PUF's applicability in heavy metal removal by incorporating activated carbon, bentonite, and zeolite as modifying fillers.…”

Section: Introductionmentioning

confidence: 99%

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Filler-Modified Castor Oil-Based Polyurethane Foam for the Removal of Aqueous Heavy Metals Detected Using Laser-Induced Breakdown Spectroscopy (LIBS) Technique

et al. 2020

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The use of polymeric material in heavy metal removal from wastewater is trending. Heavy metal removal from wastewater of the industrial process is of utmost importance in green/sustainable manufacturing. Production of absorbent materials from a natural source for industrial wastewater has been on the increase. In this research, polyurethane foam (PUF), an adsorbent used by industries to adsorb heavy metal from wastewater, was prepared from a renewable source. Castor oil-based polyurethane foam (COPUF) was produced and modified for improved adsorption performance using fillers, analyzed with laser-induced breakdown spectroscopy (LIBS). The fillers (zeolite, bentonite, and activated carbon) were added to the COPUF matrix allowing the modification on its surface morphology and charge. The materials were characterized using Fourier-transform infrared (FTIR), scanning electron microscopy (SEM), and thermal gravimetry analysis (TGA), while their adsorption performance was studied by comparing the LIBS spectra. The bentonite-modified COPUF (B/COPUF) gave the highest value of the normalized Pb I (405.7 nm) line intensity (2.3), followed by zeolite-modified COPUF (Z/COPUF) (1.9), and activated carbon-modified COPUF (AC/COPUF) (0.2), which indicates the adsorption performance of Pb2+ on the respective materials. The heavy metal ions’ adsorption on the B/COPUF dominantly resulted from the electrostatic attraction. This study demonstrated the potential use of B/COPUF in adsorption and LIBS quantitative analysis of aqueous heavy metal ions.

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Section: Thermal Degradation Profilesupporting

confidence: 87%

Section: Thermal Degradation Profilementioning

confidence: 63%

Section: Thermal Degradation Profilementioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Filler-Modified Castor Oil-Based Polyurethane Foam for the Removal of Aqueous Heavy Metals Detected Using Laser-Induced Breakdown Spectroscopy (LIBS) Technique

et al. 2020

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Biodegradable hot melt adhesive based on partially saponified polyvinyl acetate/cellulose diacetate blend

Kim

Pak³

et al. 2021

J of Applied Polymer Sci

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Recycling the polymer material from the waste has a great advantage in reducing the cost of the biodegradable hot melt adhesive and solving environmental problems. Cellulose diacetate obtained from the acid hydrolysis of discarded cellulose triacetate‐based cinematographic films was blended with low molecular weight partially saponified polyvinyl acetate. The degree of substitution of cellulose diacetate and the degree of saponification of partially saponified polyvinyl acetate to obtain the binary blends having excellent compatibility were determined by FTIR and DSC. TGA showed that these blends have sufficient thermal stability for hot melt adhesive applications. The viscoelastic properties of the blends were evaluated by DMA and melt viscosity. The shear strength and the biodegradability of the final hot melt adhesive were examined according to the amount of cellulose diacetate in the blends. The results indicate that adding 20% of cellulose diacetate can reduce the cost of partially saponified polyvinyl acetate ‐based hot melt adhesive while improving the adhesive strength.

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Strong, Reusable, and Self‐Healing Lignin‐Containing Polyurea Adhesives

et al. 2020

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Reusable, self‐healable, removable, and strong bio‐based polyurea adhesives were successfully synthesized via partially substituting polyetheramine with polyetheramine‐grafted lignin and introducing a chain extender containing dynamic disulfide bonds. The polyetheramine‐grafted lignin endowed the polyurea adhesives with significantly enhanced adhesion strength on either metal or wood substrates by introducing intensive hydrogen bonding interactions; the dynamic disulfide bonds played a key role in the excellent self‐healing and reusable performance. The thermostability of polyurea adhesives was also improved by introducing lignin. This work provides a novel approach for the high‐value utilization of low‐cost lignin in recyclable adhesives with excellent comprehensive performance.

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Synthesis and mechanical properties of bio-sourced polyurethane adhesives obtained from castor oil and MDI-modified cellulose acetate: Influence of cellulose acetate modification

Cited by 50 publications

References 62 publications

Filler-Modified Castor Oil-Based Polyurethane Foam for the Removal of Aqueous Heavy Metals Detected Using Laser-Induced Breakdown Spectroscopy (LIBS) Technique

Filler-Modified Castor Oil-Based Polyurethane Foam for the Removal of Aqueous Heavy Metals Detected Using Laser-Induced Breakdown Spectroscopy (LIBS) Technique

Biodegradable hot melt adhesive based on partially saponified polyvinyl acetate/cellulose diacetate blend

Strong, Reusable, and Self‐Healing Lignin‐Containing Polyurea Adhesives

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