Castor oil‐based polyurethane/silica nanocomposites: Morphology, thermal and mechanical properties

Wang, Chengshuang; Xu, Feng; He, Meng; Ding, Liang; Li, Shuiping; Wei, Jun

doi:10.1002/pc.24798

Cited by 30 publications

(27 citation statements)

References 38 publications

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“…Analytical-grade acetone, toluene, isopropyl alcohol, acetic acid, hydrochloric acid, and castor oil were all purchased from Shanghai Energy Chemical Co., Ltd. (Shanghai, China). The OH value of castor oil was 160 mg KOH g −1 , which was determined according to the previous report [44]. Isophorone diisocyanate (IPDI) was obtained from Shanghai Aladdin Biochemical Technology Co., Ltd. (Shanghai, China).…”

Section: Methodsmentioning

confidence: 99%

“…The neat PU was synthesized by the reaction of IPDI with castor oil according to our previously described method [44]. The PU/ATT nanocomposites were prepared as follows: the three ATTs (ATT, acid-ATT, and KH560-ATT) were respectively added in dry acetone and the obtained suspension was sonicated for 60 min.…”

Section: Methodsmentioning

confidence: 99%

“…The functional nanofillers can be one-dimensional, such as fibers and nanotubes; two-dimensional, such as layered silicate minerals like clay; and three-dimensional, such as cubical and spherical nanoparticles. Thus, clays, such as montmorillonite [27,28,29] and attapulgite (ATT) [30,31], carbon nanotubes [32], reduced graphene oxide [33,34], cellulose nanowhiskers [35] and cellulose nanocrystals [36,37,38], a large number of nanoparticles of metals, and their oxides [39,40,41,42,43,44,45], are used as nanomaterials in the preparation of bio-based PU nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

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Reinforcement of Castor Oil-Based Polyurethane with Surface Modification of Attapulgite

et al. 2018

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Polyurethane/attapulgite (PU/ATT) nanocomposites derived from castor oil were prepared by incorporation of 8 wt % ATT, acid-treated ATT, and KH560-treated ATT. The effects of three ATTs (ATT, acid-ATT, and KH560-ATT) on the comprehensive properties of PU/ATT nanocomposites were systematically investigated. The results showed that the incorporation of 8 wt % of three ATTs could produce an obvious reinforcement on the castor oil-based PU and that the silane modification treatment, rather than the acid treatment, has the more effective reinforcement effect. SEM images revealed the uniform dispersion of ATT in the PU matrix. DMA confirmed that the storage modulus and glass transition temperature (Tg) of PU/ATT nanocomposites were significantly increased after blending with different ATTs. For PU/KH560-ATT8 nanocomposites, the thermal stability of the PU was obviously enhanced by the addition of KH560-ATT. In particular, 8 wt % KH560-ATT loaded castor oil-based PU nanocomposites exhibit an obvious improvement in tensile strength (255%), Young’s modulus (200%), Tg (5.1 °C), the storage modulus at 25 °C (104%), and the initial decomposition temperature (7.7 °C). The prepared bio-based PU materials could be a potential candidate to replace petroleum-based PU products in practical applications.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Reinforcement of Castor Oil-Based Polyurethane with Surface Modification of Attapulgite

et al. 2018

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“…Numerous works have been reported using castor oil as the replacement of polyols in polyurethane. [3][4][5][6][7] Castor oil, however, has several problems to directly produce a flexible polyurethane foam due to its low reactivity. 8 Also, molecular weight of castor oil is considerably lower than that of the conventional polyol.…”

Section: Introductionmentioning

confidence: 99%

Phase equilibria and surface tension in castor oil‐based polyols‐water–methanol mixture: Thermodynamic basis

Moon

Yang

Lee

et al. 2020

J of Applied Polymer Sci

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Considering the current environmental issues with petro-polymers, castor oil is a promising green alternative to the polyols to be used as the main raw material for polyurethane. However, the basic information regarding the processability of castor oil-based polyol (CP) such as its miscibility in different solvents is still elusive. Herein we have investigated the phase equilibria and surface tension of various CP solutions using thermo-optical analysis and pendent drop method, respectively. The modified double lattice (MDL) model was employed to theoretically describe those phase equilibria and surface behaviors. The phase diagrams of CPs/methanol binary systems represent upper critical solution temperature (UCST) behaviors, and CPs/methanol/water ternary systems show Treybal Type 2 behaviors. The surface tension results exhibit preferential solvent adsorption, which means affinity of the solvent to be present in surface is higher than that of the polymer. The calculated results showed good agreement with the experimental observations.

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“…Wang et al 21 have studied about the morphology, thermal, and mechanical properties of the castor oil‐based polyurethane/silica nanocomposites (PU/SNP). They showed that the SNP surface was modified with 3‐glycidoxypropyltrimethoxysilane and c‐methacryloxy‐propyltrimethoxysilane.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of microstructure, thermal, and mechanical properties of the green lignin‐based polyurethane/hydrophobic silica nanocomposite foam

Mohammadpour

Sadeghi

2020

J of Applied Polymer Sci

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In the present study, lignin‐based polyurethane foam (LPUF) and hydrophobic silica LPUF (SLPUF) were synthesized using different concentrations of silica nanoparticles (SNP). The effect of SNP on the structure and properties of SLPUF samples was investigated and compared with LPUF through the scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT‐IR), thermogravimetric analysis (TGA), dynamic mechanical thermal analysis (DMTA), and compressive tests. The FT‐IR results showed changes in the H bonding interactions between the structures of SLPUF samples. Moreover, the SEM results indicated a decrease in the cell size of SLPUF samples. Incorporation of SNP improved the thermal stability of SLPUF samples while the compressive strength of SLPUF samples decreased in comparison with LPUF. Furthermore, the DMTA results revealed a decrease in the glass transition temperature from 90°C (LPUF) to around 52°C (SLPUF samples). This means that applying the hydrophobic SNP changes the foam type from a rigid foam to soft one. Therefore, significant changes were observed in the physical–chemical properties of the SLPUF samples compared to the LPUF.

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Castor oil‐based polyurethane/silica nanocomposites: Morphology, thermal and mechanical properties

Cited by 30 publications

References 38 publications

Reinforcement of Castor Oil-Based Polyurethane with Surface Modification of Attapulgite

Reinforcement of Castor Oil-Based Polyurethane with Surface Modification of Attapulgite

Phase equilibria and surface tension in castor oil‐based polyols‐water–methanol mixture: Thermodynamic basis

Evaluation of microstructure, thermal, and mechanical properties of the green lignin‐based polyurethane/hydrophobic silica nanocomposite foam

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