Characterization of raw and alkali treated cellulosic Grewia Flavescens natural fiber

Tiwari, Yugesh Mani; Sarangi, Saroj Kumar

doi:10.1016/j.ijbiomac.2022.04.169

Cited by 42 publications

(22 citation statements)

References 29 publications

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“…Figure e–h compares ELP treatment with other improvement methods mentioned in the literature, such as enzyme pretreatment, boric acid treatment, low-concentration alkali treatment, , and so forth. The comparison manifests that the ELP treatment has the optimal performance in improving the T d initial of natural polymers.…”

Section: Resultsmentioning

confidence: 99%

“…Regarding the thermal instability of BFs, several strategies such as impregnation with flame retardants, heat treatment, boric acid treatment, and alkali treatment have been applied . The esterification and grafting have also been proven to be effective in improving thermal stability. , However, these thermal stability modification methods are either complex with long processing times or high energy consumption. In addition, all the above modifications can only solve a single application defect.…”

Section: Introductionmentioning

confidence: 99%

“…16 The esterification and grafting have also been proven to be effective in improving thermal stability. 17,18 However, these thermal stability modification methods are either complex with long processing times or high energy consumption. In addition, all the above modifications can only solve a single application defect.…”

Section: Introductionmentioning

confidence: 99%

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Improving the Thermal Stability and Functionality of Bamboo Fibers by Electroless Plating

Zhang

Wang

Chen

et al. 2022

ACS Sustainable Chem. Eng.

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As environmental stress is caused by using fossilbased plastics, bamboo fibers (BFs), as one of the important natural materials, have received more and more attention. However, their poor thermal stability and lack of functionality largely limit their wider application. In this work, the electroless plating method was used to improve the thermal stability of the BFs and impart this function. It was found that the amount of metal deposition was the main factor affecting the thermal stability of BFs. A critical value existed, above which the surface of BFs could be completely covered by a plating layer, resulting in much enhanced thermal stability. The initial degradation temperature of BFs could be improved by 31 °C, as detected by TG. XRD and TG-FTIR spectroscopy were used to further understand the observed increase in thermal stability induced by electroless plating. It is suggested that the coating layer could block the invasion of external O 2 , thus delaying the degradation time and the pyrolysis rate. It is also very interesting to find that hygroscopicity and electrical and magnetic properties could be simultaneously improved. Our work provides a new method for the modification of BFs, which is important for the application of BFs.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Improving the Thermal Stability and Functionality of Bamboo Fibers by Electroless Plating

Zhang

Wang

Chen

et al. 2022

ACS Sustainable Chem. Eng.

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“…Then there was the decomposition of lignin after 370 C. Similar researches related to the decomposition of cellulose were reported for various fibers. [34][35][36] TA data show that the initial degradation temperatures of CGs with different treatments occurred at 226, 289, 304, and 305 C, respectively. Compared to UCG, the CG Na, CG Si, and CG Na Si have higher thermal stability, as demonstrated by higher initial degradation temperature.…”

Section: Scanning Electron Microscope Analysismentioning

confidence: 99%

Effect of different chemical surface treatments on interfacial compatibility and properties of polyhydroxyalkanoates/coffee grounds composites

Tang

Hou²,

Wang

et al. 2022

Polymer Composites

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The aim of this study was to improve the interfacial compatibility of polyhydroxyalkanoates (PHA) with coffee grounds (CGs) in order to enhance the properties of the composites. Three different methods including alkali, silane, and alkali/silane treatments were used for the surface modification of CGs to construct compatible interfaces and were compared to obtain the most effective modification method. The results showed that the alkali treatment increased the tensile strength, flexural strength, and elongation at break of the composites by 12.61%, 9.81%, and 3.81%, respectively. The silane coupling

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“…The next peak at the lattice plane ). [18,20,46] This enhancement in the C.I. values of optimally alkalized ZN fibers is because of amorphous contents namely lignin, hemicellulose removal from the ZN fiber chemical composition that aids in cellulose percentage enhancement.…”

Section: Xrd Analysis Of Optimally Alkalized and Raw Zn Fibersmentioning

confidence: 99%

Suitability assessment of raw‐alkalized Ziziphus nummularia bark fibers and its polymeric composites for lightweight applications

SV¹,

Rajendran²,

N³

2022

Polymer Composites

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The global trend of environmental protection has led to replacing synthetic fibers in every feasible application with natural fibers. An alteration of the fiber's surface is essential for the natural fiber to be more suitable for use. In this study, the mercerization processes including 5% (wt/vol) sodium hydroxide solution at five different soaking times (15, 30, 45, 60, and 75 min), were used in this study to enhance various features of Ziziphus nummularia fibers isolated from Ziziphus nummularia plant stems. Results showed that 60 min alkalized Ziziphus nummularia fibers had cellulose content of 65.72%, which seems to be higher, and it was termed as optimally alkalized Ziziphus nummularia fibers. The thermal studies showed that optimally alkalized Ziziphus nummularia fibers had a degradation temperature of 360 C. The optimally alkalized Ziziphus nummularia fibers showed a crystalline index of 50.6% and crystal size of 3.52 nm. Epoxy composites were manufactured with various loading percentages of optimally alkalized and raw Ziziphus nummularia fibers to prove the application suitability. It was shown that 20 wt% of optimally alkalized Ziziphus nummularia fibers-based epoxy composites showed a higher ultimate tensile strength of 40.31 MPa than all other composites. Scanning Electron microscope studies elucidated the fiber's surface behavior and other characteristics of fibers and tested epoxy composites.

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Characterization of raw and alkali treated cellulosic Grewia Flavescens natural fiber

Cited by 42 publications

References 29 publications

Improving the Thermal Stability and Functionality of Bamboo Fibers by Electroless Plating

Improving the Thermal Stability and Functionality of Bamboo Fibers by Electroless Plating

Effect of different chemical surface treatments on interfacial compatibility and properties of polyhydroxyalkanoates/coffee grounds composites

Suitability assessment of raw‐alkalized Ziziphus nummularia bark fibers and its polymeric composites for lightweight applications

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