A study of wet and dry strength properties of unaged and hygrothermally aged paper sheets reinforced with biopolymer composites

Adel, Abeer M.; Dupont, Anne-Laurence; Abou-Yousef, Hussein; El-Gendy, Ahmed A.; Paris, Sabrina; El‐Shinnawy, Nabila A.

doi:10.1002/app.40761

Cited by 11 publications

(8 citation statements)

References 30 publications

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“…Chitosan is a unique polysaccharide derived from deacetylation of chitin, structure of chitosan is shown in Scheme 1, the second most abundant natural polysaccharide (17) . Chitosan, as bio-based substrate has been used in wide varieties of applications in biomedical field (18,19) .…”

Section: Methodsmentioning

confidence: 99%

Bio-based Hydrogel Formed by Gamma Irradiation

2016

Egypt. J. Chem.

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ARBOXYMETHYL chitosan (CMCt) was synthesized through ….. carboxymethylation reaction for chitosan. The prepared (CMCt) was subjected to crosslinking reaction by using γ-radiation. Different process parameters were investigated to clarify the effect of radiation dose, pH, and time upon the gel fraction and swelling properties of the produced hydrogels. The gel fraction was reduced after radiation dose 20 KG. The swelling% was dependent on the paste concentrations. At higher paste concentrations, 30-40% higher doses of γ-radiation, 20 KG, were required for optimum swelling. The high concentration paste, 40%, showed superior swelling in alkaline medium, pH > 8, while lower concentration paste manifested optimum swelling in neutral medium, pH = 7. The prepared (CMCt) hydrogels were characterized by FTIR, SEM, DSC and swelling kinetics.Keywords: Carboxymethyl chitosan (CMCt), Hydrogel, γ-ray radiation, Swelling, FTIR, SEM and DSC.Hydrogels are three-dimensional structure of cross-linked polymer, which have affinity for water absorption (1) . The hydrogel matrix has been hold by chemical or physical cross-linking that involves hydrophilic groups of homopolymers or copolymers (2) . Hydrogels swell in water by retaining a significant fraction of water within the pores structure without dissolving (3) . Several applications for hydrogels have been developed in biomedical and industrial fields such as artificial implants, contact lenses, enzyme immobilization (4)(5)(6) . Recent applications for hydrogels are interesting in drug delivery and agriculture in which water release from hydrogel is essential features (7)(8)(9)(10)(11)(12) . Radiation crosslinking is considered as clean and effective method for hydrogel preparation. On comparison with conventional hydrogel preparation, cross-linking through irradiation process did not need initiators, or chemical cross-linking. Radiation methods are efficient and safe alternative for cross-linking without using toxic additives (13) . Lugao reviewed the application of radiation processing in preparing hydrogels (14) . It was shown that the radiation technique is a powerful tool for controlling the degree of cross-linking of the produced hydrogels. Hydrogels, biodegradable and biocompatible polymers, obtained by irradiation cross-linking have a variety of applications, in different fields, such as biomedical devices (15) and control release of drug (16) .

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Section: Methodsmentioning

confidence: 99%

Bio-based Hydrogel Formed by Gamma Irradiation

2016

Egypt. J. Chem.

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“…Salah satu biopolimer yang dapat digunakan dalam industri pulp dan kertas dan memiliki persyaratan tersebut adalah kitosan. Kitosan merupakan polisakarida alami yang berasal dari cangkang hewan jenis krustasea yang dapat digunakan karena sifat yang ramah lingkungan, tidak beracun, anti bakteri, tidak berbau dan mudah teruraikan (Adel et al, 2014). Gugus amina pada kitosan dapat bereaksi dengan aldehida selulosa dan akan menghasilkan ikatan kovalen baru.…”

Section: Pendahuluanunclassified

Penggunaan Kitosan Modifikasi dan Pati Kationik sebagai Resin Penguat Basah pada Kertas <i>Interleave</i>

2022

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Use of Modified Chitosan and Cationic Starch as Wet Strength Agents on Interleave PaperAbstractWet strength resins commonly used in the paper industry to date are formaldehyde-derived resins, epichlorohydrin polyamide resins, and epoxide resins. These conventional resins have weaknesses such as containing monomer groups that are toxic, difficult to degrade and harmful to health and the environment. Therefore, it is necessary to innovate to overcome these weaknesses, one of which is the development of biopolymer resins. One type of biopolymer is chitosan modified with maleic anhydride so that it has the characteristics of being non-toxic, biodegradable, anti-bacterial, and odorless. With the addition of cationic starch, modified chitosan will work more effectively to produce good strength properties on interleave paper. This laboratory scale study aims to determine the effect of the addition of modified chitosan and cationic starch on the wet and dry strength properties of paper. The test results showed that the addition of 0.7% modified chitosan and 1% cationic starch gave the highest strength properties. The addition of modified chitosan and cationic starch affects the physical properties of the paper such as wet and dry tensile strength index, tearing strength index, bursting strength index, water absorption, and surface pH.Keywords: maleic anhydride, cationic starch, wet strength, interleave paper, modified chitosanAbstrakResin-resin penguat basah yang umum digunakan di industri kertas hingga saat ini adalah resin turunan formaldehid, resin poliamida epiklorohidrin, dan resin epoksida. Resin-resin konvensional ini memiliki kelemahan diantaranya mengandung gugus monomer yang toksik, sulit terdegradasi, berbahaya bagi kesehatan dan lingkungan. Oleh karenanya perlu dilakukan inovasi untuk mengatasi kelemahan tersebut, salah satunya adalah pengembangan resin biopolimer. Salah satu jenis biopolimer adalah kitosan dimodifikasi dengan anhidrida maleat sehingga memiliki karakteristik tidak beracun, dapat terurai secara hayati, anti bakteri, dan tidak berbau. Dengan penambahan pati kationik, kitosan modifikasi akan bekerja lebih efektif untuk menghasilkan sifat kekuatan yang baik pada kertas interleave. Penelitian skala laboratorium ini bertujuan untuk mengetahui pengaruh penambahan kitosan yang dimodifikasi dan pati kationik terhadap sifat kekuatan basah dan kering kertas. Hasil pengujian menunjukkan bahwa penambahan 0,7% kitosan yang dimodifikasi dan pati kationik 1% memberikan sifat kekuatan paling tinggi. Penambahan kitosan modifikasi dan pati kationik berpengaruh pada sifat fisik kertas seperti indeks tarik basah dan kering, indeks sobek, indeks retak, daya serap air dan pH pada permukaan.Kata Kunci: anhidrida maleat, pati kationik, kekuatan basah, kertas interleave, kitosan modifikasi

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“…Both the tensile strength and E-modulus of the CSF films in the wet state decreased with increasing silk content, unlike the results corresponding to the dry films. These results can be attributed to the water molecules absorbed into the films increasing the intermolecular distance and interfering with the interaction between the cellulose the and SF (Plaza et al 2008;Adel et al 2014). In addition, poor development of the silk II structure of SF apparently affects the physical strength of the film against water.…”

Section: Mechanical Analysismentioning

confidence: 99%

Influence of silk fibroin content on cellulose blend film using LiBr solution

Yang

Kwon

Hwang

et al. 2020

BioRes

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Cellulose–silk fibroin (CSF) films were prepared by blending cellulose and silk fibroin (SF) in different ratios (10:0, 10:3, 10:6, 10:9, and 10:12 wt%) in 60% LiBr aqueous solution. All of the blend films were transparent, and their coloration gradually increased with increasing SF content. Interestingly, cross-sections of all of the tested films were observed by scanning electron microscopy and exhibited similar morphologies. The silk II structure was not well developed in the CSF; however, regenerated SF affected the crystal structure of the cellulose and formed intermolecular hydrogen bonds with cellulose. EDS mapping showed that cellulose and silk in the film were distributed uniformly. The mechanical properties of the dry-state film was greatly improved with the addition of an appropriate amount of SF. In contrast with the dry-state films, the films in the wet state exhibited smaller tensile strengths and E-modulus as SF content increased; however, the elongation values were higher than those in the dry-state films.

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A study of wet and dry strength properties of unaged and hygrothermally aged paper sheets reinforced with biopolymer composites

Cited by 11 publications

References 30 publications

Bio-based Hydrogel Formed by Gamma Irradiation

Bio-based Hydrogel Formed by Gamma Irradiation

Penggunaan Kitosan Modifikasi dan Pati Kationik sebagai Resin Penguat Basah pada Kertas <i>Interleave</i>

Influence of silk fibroin content on cellulose blend film using LiBr solution

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