Contribution of Hydrogen Bonds to Paper Strength Properties

Dubowik, Marcin; Kucner, Marta; Przybysz, Piotr; Buzała, Kamila Przybysz

doi:10.1371/journal.pone.0155809

Cited by 50 publications

(22 citation statements)

References 15 publications

(15 reference statements)

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“…Ion logam mempunyai fungsi jembatan gugus OH. Hal tersebut membantu memperkuat ikatan kovalen antara serat selulosa yang memiliki gugus OH - (Altaner et al 2010;Elshemy, 2011;Aji et al, 2014;Pickering et al, 2016;Przybysz et al, 2016). Semakin besar ion logam yang ada, maka ikatan yang terjadi antara serat dan serat semakin bagus.…”

Section: Perbandingan Hasil Kain Uji Pewarna Daun Mangga Berfiksasi Dunclassified

Utilization of Arum Manis Mango Leaves (Mangifera Indica Linn) as Textiles Natural Dyes

Rahmah

Wignyanto²,

Hafiz³

2017

JTP

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ABSTRAKPenelitian ini adalah untuk mengetahui pengaruh jenis dan konsentrasi fiksator terhadap kualitas pewarna alami dari daun mangga arum manis yang diaplikasikan pada kain. Penelitian ini menggunakan Rancangan Acak Tersarang dengan dua faktor. Faktor utama adalah jenis fiksator yaitu tawas, garam, dan kapur tohor, sedangkan faktor tersarang adalah konsentrasi pada setiap fiksator. Konsentrasi fiksator terdiri dari tawas dengan konsentrasi 10% dan 15%, garam 10% dan 12%, serta kapur tohor 8% dan 10%. Sifat setiap fiksator dapat mempengaruhi arah warna serta ikatan antar serat dan pigmen warna. Pada fiksator tawas, perlakuan terbaik diperoleh pada konsentrasi 10% dengan nilai a* 11.63, nilai b* 22.3, dan nilai L* 63.13. Pada fiksator garam, perlakuan terbaik terdapat pada konsentrasi 10% dengan nilai a* 9.87, nilai b* 30.1, dan nilai L* 62.07. Pada fiksator kapur tohor, perlakuan terbaik terdapat pada konsentrasi 10% dengan nilai a* 14.57, nilai b* 29.3, dan nilai L* 56.8 PENDAHULUANTanaman mangga (Mangifera indica L.) merupakan tanaman holtikultura yang mempunyai nilai ekonomis tinggi karena memiliki kandungan gizi yang cukup tinggi bagi kesehatan manusia. Luas lahan tanaman mangga di Indonesia mencapai 18354990 km 2 . Luas lahan terbesar terdapat pada Jawa Timur dengan luas lahan 55955299 km 2 dan disusul oleh Jawa Barat dengan luas lahan 3151115 km 2 (BPS, 2015). Setiap bagian tanaman mangga dapat dimanfaatkan, salah satunya adalah bagian daun. Mangga (Mangifera indica L.) memiliki banyak varietas, akan tetapi varietas mangga arum manis adalah varietas yang banyak dibudidayakan. Daun mangga mengandung pigmen warna flavonoid yang akan menghasilkan warna hijau kekuningan (Pujiarti et al., 2009). Pigmen tersebut dapat diaplikasikan sebagai pewarna alami pada kain.

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Section: Perbandingan Hasil Kain Uji Pewarna Daun Mangga Berfiksasi Dunclassified

Utilization of Arum Manis Mango Leaves (Mangifera Indica Linn) as Textiles Natural Dyes

Rahmah

Wignyanto²,

Hafiz³

2017

JTP

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“…Gum gum, a polysaccharides composed of D-mannopyranose and D-galactopyranose, was essayed likewise as a contrast because of its structural similarity with carrageenan and mature industrial application in papermaking[ 13 , 14 ] The results in Fig 1A and 1B show that the tensile and bursting indices of the handsheets increased rapidly with increasing carrageenan dosage. Among the factors contributing to paper strength characteristics, hydrogen bonding was dominant [ 15 ]. In the handsheet drying process, the hydroxyl and sulfate groups of carrageenan formed numerous hydrogen bonds with hydroxyl groups of cellulose fibres, especially the sulfate groups of carrageenan, which contributed extra hydrogen bonds compared with hydroxyl [ 16 ].…”

Section: Resultsmentioning

confidence: 99%

Carrageenan as a dry strength additive for papermaking

Liu

Xie

2017

PLoS ONE

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Carrageenans are commercially important sulfated gums found in various species of red seaweeds (Rhodophyta), wherein they serve a structural function similar to that of pectins in land plants. In this study, carrageenan was used independently or in combination with cationic polyacrylamide (CPAM) and/or Al2(SO4)3 to explore its application as a dry strength additive in papermaking. Strength index determination, ash content detection, FTIR characterization and SEM observation were performed on prepared handsheets. The results showed that with 0.6% Al2(SO4)3 and 0.2% carrageenan as additives, the tensile index increased by 13.53% and precipitated calcium carbonate (PCC) retention increased by 57.06%. With 0.6% Al2(SO4)3, 0.2% carrageenan and 0.03% CPAM as additives, PCC retention increased by 121% while the tensile index did not fall compared to handsheets without additives, indicating that carrageenan could enhance the strength of handsheets and be used as an anionic dry strength agent.

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“…Paper goods also comprise environmentally-friendly components from fibrous crops, mainly wood and recycled streams, such as pulp, as part of their usefulness and relatively low prices. [14].…”

Section: Serkan Nohut Et Allmentioning

confidence: 99%

Design & Development of a Computer Controlled Tensile Strength Testing Machine for Testing of Strings & Fabrics

Sharma¹,

Kumar²

2021

IJAERS

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Tensile testing is a primary material science test in which a sample is tension-proof until it is failure. Test results are frequently used to select an application material, to verify quality and to forecast how the material reacts with other forces. The features assessed directly by a tensile test include maximum tensile strength, maximum length and a reduction of the area. From these measures the following characteristics can also be determined: Young modulus, the ratio of Poisson, yield strength and stress resistance. Testing machine is used for the development and maintenance of better information on known materials or the development of new materials. There are many test machines, but the most common of these is the one that tests tensions, compression and bending of the materials. For the test specimen to be tested, the engine must have the proper characteristics. Three major parameters exist: strength, speed, accuracy and precision. The test machine is mainly used in the creation of the stress line diagram. The computer algorithm may be applied to compute the yield strength, tensile force, youth module or total elongation once the diagram has been generated. The author has designed & fabricated a model for demonstration of the techniques employed using viper motor (DC motor) for force exertion, load cell & instrumentation amplifier of reading force, ultrasonic distance sensor for measurement of displacement. Simultaneously a tripod mounted webcam is employed to capture real time video & image processing & employed to compute displacement on the basis of motor movement.The electromechanical and hydraulic models are offered for two types of machinery. An electric motor, a gear reduction system, and a transducers move one, two or four screws are used to produce the electromechanical Ravi Babu Sharma et al.

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Contribution of Hydrogen Bonds to Paper Strength Properties

Cited by 50 publications

References 15 publications

Utilization of Arum Manis Mango Leaves (Mangifera Indica Linn) as Textiles Natural Dyes

Utilization of Arum Manis Mango Leaves (Mangifera Indica Linn) as Textiles Natural Dyes

Carrageenan as a dry strength additive for papermaking

Design & Development of a Computer Controlled Tensile Strength Testing Machine for Testing of Strings & Fabrics

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