Graft Copolymerization of Lignocellulosic Fibers

Characterization of grafted jute fiber using acrylate monomers pretreated with alkali
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In this work, thermoplastic sago star Properties of thermoplastic rice starch composites reinforced by cotton fiber or low-density polyethylene. Prachayawarakorn 1 Estimated H-index: 1. Biodegradable polymer was prepared from thermoplastic rice starch TPRS plasticized by glycerol. Iben Damager 12 Estimated H-index: Carbohydrates constitute the most abundant group of organic compounds found in nature. Oxygenic photosynthesis, the process energizing carbon dioxide fixation in the biosphere, is estimated to tons of dry weight biomass per year, most of it being carbohydrate. Xuguang Jiang 16 Estimated H-index: Abstract The pyrolysis and combustion characteristics of urea-formaldehyde resin UFR residue were investigated by using thermogravimetric analysis, coupled with Fourier transform infrared spectroscopy TG-FTIR.

It is indicated that the pyrolysis process can be subdivided into three stages: drying the sample, fast thermal decomposition and further cracking process. Published on Dec 1, in Advanced Materials Research. Xian Zhong Mo 1 Estimated H-index: 1. Banana fibers received four treatments, namely squeezing, alkali and hydrogen peroxide treatment, washing with water, and drying.

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Thermoplastic starch composites was prepared with glycerol as the plasticizer, banana fiber as reinforcement and thermoplastic cassava starch as matrix. The banana fiber could increase processing torque highly, while the effects of fiber contents on peak torque at 3min was so obvious. X-ray diffractograms illustrated that with increasing fiber content, cellulose cryst Cassava bagasse cellulose nanofibrils reinforced thermoplastic cassava starch.

Teixeira 19 Estimated H-index: Cellulose cassava bagasse nanofibrils CBN were directly extracted from a by-product of the cassava starch CS industry, viz.

Biodegradable composites based on lignocellulosic fibers—An overview. Advertising Policy Journal Subscription's Indexing. Purchase PDF. Welcome to the new website of Advance Materials Letters!

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Important Information for Manuscript Submission Submission of revised manuscripts - If you have submitted your article in our old submission system , all authors are requested to submit their revisions in the old submission system using your existing username and passwords. We Social Follow us on. The peaks are observed at An additional peak at This confirms the grafting of MMA onto delignified Grewia optiva fiber. Figure 4. It is evident from Table 2 that raw Grewia optiva fiber and delignified Grewia optiva fiber showed In case of delignified Grewia optiva , the incorporation of monomers chains to fiber backbone had impaired the crystallinity of fiber.

Whereas, graft copolymers prepared under the influence of MWRs showed fewer disturbances in the crystalline lattice. This is due to the reason that optimum reaction time for grafting under MWR was very low and thus the fiber underwent a fewer disturbances in its crystalline structure.

mlsit.ru/includes/horse/vse-o-chisle-4-v-numerologii.html Moreover, fiber faces less surface deformations during grafting process under the influence of MWRs, thereby retaining better crystalline structure. Table 2. The initial decomposition temperature IDT of the delignified Grewia optiva fiber has been found to be It may be due to the decomposition of the cellulosic material in the first stage and decomposition of poly MMA in second stage.

From the table it is also evident that there has been an increase in the IDT of MMA grafted fiber upon graft copolymerization with different binary monomer mixture. The increase in the IDT of grafted fibers could be attributed to the incorporation of the polymer chains of comonomers on the surface of fiber. The grafted and ungrafted fiber has been used as adsorbent for removal of methylene blue from water system. At a fixed adsorbent dosage of fibers, the amount of dye adsorbed increased with the concentration of dye.

It may be due to the increase in the driving force of the concentration gradient at higher initial dye concentration. It has been revealed that the percentage of adsorption increased initially and then became almost constant. Thus, dye concentration is one of the most important factors controlling the adsorption of dye onto adsorbent.

LIGNOCELLULOSIC PRET 2

Adsorption is a mass transfer process that can generally be defined as the accumulation of material at the interface between two phases Table 4. The q e value for grafted fiber was much higher than that of ungrafted fiber.

Advanced Materials Letters

Graft Copolymerization of Vinyl Monomers onto Cellulosic Fibers. B. RÅNBY and L. GÄDDA. Chapter 3, pp DOI: /bk Graft Copolymerization of Lignocellulosic Fibers. ACS‐Symposium Series Hg. Von DAVID N.‐S. HON. Washington: American Chemical Society

Table 4. MWR induced grafting is an effective method for modifying the properties of natural fibers in terms of graft yield, time consumption, and cost effectiveness.

Original Research ARTICLE

Although with an increase in grafting, percentage crystallinity and CI decreased, but incorporation of Poly MMA-co-EMA , and Poly MMA-co-EA chains on the backbone polymer resulted in higher acid, base, and thermal resistance properties as compared to those of delignified sample.

Moreover, on grafting morphological changes with respect to surface topography have taken place and graft copolymers have been found to exhibit different physical and chemical properties. Therefore, the cellulosic fibers graft copolymerized with vinyl monomers from their binary mixtures have improved properties which can ensure the utilization of these fibers in various industrial applications.

Moreover, the removal of methylene dye was found more for grafted samples as compared to that with ungrafted samples. The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. The authors wish to thank vice chancellor Shoolini University Solan H. India for providing laboratory facility to complete this work.

Supplementary files

Bhattacharyya, K. Kinetics and thermodynamics of Methylene Blue adsorption on Neem Azadirachta indica leaf powder.

Graft copolymerization of lignocellulosic fibers /

Dyes Pigments 65, 51— CrossRef Full Text. Brandrup, J. Cowling, E. Physical and chemical constraints in the hydrolysis of cellulose and lignocellulosic materials. Pubmed Abstract Pubmed Full Text. Gupta, K. Graft copolymerization of acrylamide onto cellulose in presence of comonomer using ceric ammonium nitrate as initiator. Graft copolymerization of ethyl acrylate onto cellulose using ceric ammonium nitrate as initiator in aqueous medium.

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Biomacromolecules 3, — Gupta, V. Removal of Cr VI onto Ficus carica biosorbent from water. Amputation of congo red dye from waste water using microwave induced grafted Luffa cylindrica cellulosic fiber. Remediation of noxious chromium VI utilizing acrylic acid grafted lignocellulosic adsorbent. Remediation and recovery of methyl orange from aqueous solution onto acrylic acid grafted Ficus carica fiber: isotherms, kinetics and thermodynamics.

Jonathan, Y. Kaith, B. Grafting of flax fiber Linum usitatissimum with vinyl monomer for enhancement of properties of flax-phenolic composires.

Publications @ NIT, Hamirpur

Graft copolymerization of MMA onto flax under different reaction conditions: a comparative study. Express Polym. Preparation of microwave radiation induced graft copolymers and their applications as reinforcing material in phenolic composites. Kalia, S. Biopolymers: Biomedical and Environmental Applications, 1st Edn. New Jersey, NJ: Wiley. Kiani, G. Heavy metal ion removal from aqueous solutions by functionalized polyacrylonitrile. Deselination , — Kitagawa, M.