Drying of the Natural Fibers as A Solvent-Free Way to Improve the Cellulose-Filled Polymer Composite Performance

Cichosz, Stefan

doi:10.3390/polym12020484

Cited by 19 publications

(11 citation statements)

References 104 publications

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“…The length of the fibres varies between 6-12 μm and the pH is from 5-7.5. The cellulose moisture content is approximately 6 wt% (estimated on the basis of the previous study [30]).…”

Section: Methodsmentioning

confidence: 97%

Superiority of Cellulose Non-Solvent Chemical Modification over Solvent-Involving Treatment: Solution for Green Chemistry (Part I)

Cichosz

2020

Materials

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In the following article, a new approach of cellulose modification, which does not incorporate any solvents (NS), is introduced. It is compared for the first time with the traditional solvent-involving (S) treatment. The analysed non-solvent modification process is carried out in a planetary mill. This provides the opportunity for cellulose mechanical degradation, decreasing its size, simultaneously with ongoing silane coupling agent grafting. Fourier-transform infrared spectroscopy (FT-IR) indicated the possibility of intense cleavage of the glucose rings in the cellulose chains during the mechano-chemical treatment. This effect was proved with dynamic light scattering (DLS) results—the size of the particles decreased. Moreover, according to differential scanning calorimetry (DSC) investigation, modified samples exhibited decreased moisture content and a drop in the adsorbed water evaporation temperature. The performed research proved the superiority of the mechano-chemical treatment over regular chemical modification. The one-pot bio-filler modification approach, as a solution fulfilling green chemistry requirements, as well as compromising the sustainable development rules, was presented. Furthermore, this research may contribute significantly to the elimination of toxic solvents from cellulose modification processes.

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“…The length of the fibres varies between 6-12 μm and the pH is from 5-7.5. The cellulose moisture content is approximately 6 wt% (estimated on the basis of the previous study [30]).…”

Section: Methodsmentioning

confidence: 97%

Superiority of Cellulose Non-Solvent Chemical Modification over Solvent-Involving Treatment: Solution for Green Chemistry (Part I)

Cichosz

2020

Materials

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“…The FTIR spectra of WS and WS-based polyol are presented in Figure 2b,c, respectively. Intense bands at 1030 and 2955 cm −1 refer to the stable bands of cellulose, hemicellulose, and lignin of WS, and they are attributed to the C-H vibration [37][38][39][40].…”

Section: Characterization Of Ws-based Polyolmentioning

confidence: 99%

Application of Walnut Shells-Derived Biopolyol in the Synthesis of Rigid Polyurethane Foams

2020

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This study aimed to examine rigid polyurethane (PUR) foam properties that were synthesized from walnut shells (WS)-based polyol. The Fourier Transform Infrared Spectroscopy (FTIR) results revealed that the liquefaction of walnut shells was successfully performed. The three types of polyurethane (PUR) foams were synthesized by replacement of 10, 20, and 30 wt% of a petrochemical polyol with WS-based polyol. The impact of WS-based polyol on the cellular morphology, mechanical, thermal, and insulating characteristics of PUR foams was examined. The produced PUR foams had apparent densities from 37 to 39 kg m−3, depending on the weight ratio of WS-based polyol. PUR foams that were obtained from WS-based polyol exhibited improved mechanical characteristics when compared with PUR foams that were derived from the petrochemical polyol. PUR foams produced from WS-based polyol showed compressive strength from 255 to 310 kPa, flexural strength from 420 to 458 kPa, and impact strength from 340 to 368 kPa. The foams that were produced from WS-based polyol exhibited less uniform cell structure than foams derived from the petrochemical polyol. The thermal conductivity of the PUR foams ranged between 0.026 and 0.032 W m−1K−1, depending on the concentration of WS-based polyol. The addition of WS-based polyol had no significant influence on the thermal degradation characteristics of PUR foams. The maximum temperature of thermal decomposition was observed for PUR foams with the highest loading of WS-based polyol.

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“…Many natural fillers can be successfully used as reinforcing materials in polymers [ 49 , 50 , 51 , 52 ]. It was noticed that their hydrophilic character may limit their further application.…”

Section: Introductionmentioning

confidence: 99%

Biobased Polyurethane Composite Foams Reinforced with Plum Stones and Silanized Plum Stones

Miedzińska

Członka

Strąkowska

et al. 2021

IJMS

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In the following study, ground plum stones and silanized ground plum stones were used as natural fillers for novel polyurethane (PUR) composite foams. The impact of 1, 2, and 5 wt.% of fillers on the cellular structure, foaming parameters, and mechanical, thermomechanical, and thermal properties of produced foams were assessed. The results showed that the silanization process leads to acquiring fillers with a smoother surface compared to unmodified filler. The results also showed that the morphology of the obtained materials is affected by the type and content of filler. Moreover, the modified PUR foams showed improved properties. For example, compared with the reference foam (PUR_REF), the foam with the addition of 1 wt.% of unmodified plum filler showed better mechanical properties, such as higher compressive strength (~8% improvement) and better flexural strength (~6% improvement). The addition of silanized plum filler improved the thermal stability and hydrophobic character of PUR foams. This work shows the relationship between the mechanical, thermal, and application properties of the obtained PUR composites depending on the modification of the filler used during synthesis.

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Drying of the Natural Fibers as A Solvent-Free Way to Improve the Cellulose-Filled Polymer Composite Performance

Cited by 19 publications

References 104 publications

Superiority of Cellulose Non-Solvent Chemical Modification over Solvent-Involving Treatment: Solution for Green Chemistry (Part I)

Superiority of Cellulose Non-Solvent Chemical Modification over Solvent-Involving Treatment: Solution for Green Chemistry (Part I)

Application of Walnut Shells-Derived Biopolyol in the Synthesis of Rigid Polyurethane Foams

Biobased Polyurethane Composite Foams Reinforced with Plum Stones and Silanized Plum Stones

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