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1. The fibrils untwisting limits the rate of cellulose nitration process

Author:
Nikolsky, Sergey N.; Zlenko, Dmitry V.; Melnikov, Valery P.; Stovbun, Sergey V.
Source:
Carbohydrate polymers 2019 v.204 pp. 232-237
ISSN:
0144-8617
Subject:
cellulose; cellulose microfibrils,   etc   ; molecular weight; nanofibers;     Show all 4 Subjects
Abstract:
... The rate of cellulose nitration is lower compared to the low molecular weight substances. Theoretical estimates assess that the rate of the nitrating agents’ diffusion cannot provide for the characteristic time of cellulose nitration, as the densely packed regions are too small. However, the electrostatic barrier between the nitrating mixture and the microcrystallites makes the latter inaccessible ...
DOI:
10.1016/j.carbpol.2018.10.019

2. Correction to: Isolation of xylans from bleached Eucalyptus kraft pulp by antisolvents precipitation

Author:
Marques, Ana Isabel; Serrano, Maria de Lurdes; Alves, Ana Maria Brites; de Sousa, António P. Mendes
Source:
Cellulose 2019 v.26 no.3 pp. 1993
ISSN:
0969-0239
Subject:
cellulose,   etc   ; Eucalyptus; kraft pulp;     Show all 3 Subjects
Abstract:
... Unfortunately, the word “FTIR” has been mistakenly included in the Acknowledgments, which needs to be removed. ...
DOI:
10.1007/s10570-019-02304-4

3. Pitfalls in the chemistry of cellulosic key chromophores

Author:
Hettegger, Hubert; Amer, Hassan; Zwirchmayr, Nele S.; Bacher, Markus; Hosoya, Takashi; Potthast, Antje; Rosenau, Thomas
Source:
Cellulose 2019 v.26 no.1 pp. 185-204
ISSN:
0969-0239
Subject:
cellulose,   etc   ; color; reaction mechanisms;     Show all 3 Subjects
Abstract:
... The chemistry of cellulosic key chromophores is challenging because of the usually very low concentration of the colored compounds in real-world cellulosic matrices. It offers many surprises and positive outcomes; unfortunately there are also pitfalls and disappointments. This report discusses eight examples or surprising chemistry out of the realm of cellulosic key chromophores. The reactions hav ...
DOI:
10.1007/s10570-018-2131-6

4. Preparation and properties of microfibrillated cellulose with different carboxyethyl content

Author:
Chen, Jing-Huan; Liu, Jin-Gang; Su, Yan-Qun; Xu, Ze-Hong; Li, Mei-Can; Ying, Rui-Feng; Wu, Jian-Quan
Source:
Carbohydrate polymers 2019 v.206 pp. 616-624
ISSN:
0144-8617
Subject:
cellulose; cellulose microfibrils,   etc   ; crystal structure; grinding; homogenization; moieties; polymerization;     Show all 7 Subjects
Abstract:
... Carboxyethyl reaction was used as a pretreatment method before grinding and homogenization to prepare microfibrillated cellulose (MFC). The effect of carboxyethylation on the properties of cellulose materials and prepared MFC samples were investigated. Results showed that cellulose materials with different carboxyethyl content were obtained by controlling the chemical dosage. This reaction increas ...
DOI:
10.1016/j.carbpol.2018.11.024

5. Reactive nanoparticles with activated ester moieties from cellulose acetate phthalate derivatives

Author:
Schulze, Peter; Gericke, Martin; Heinze, Thomas
Source:
Cellulose 2019 v.26 no.1 pp. 475-490
ISSN:
0969-0239
Subject:
cellulose; cellulose acetate,   etc   ; carbonates; drugs; fluorescent dyes; moieties; nanoparticles; phthalates;     Show all 8 Subjects
Abstract:
... Reactive polysaccharide (PS) based nanoparticles (NP) with activated N-hydroxysuccinimide (NHS) ester moieties were prepared by a two-step approach: (i) homogeneous synthesis of activated cellulose ester derivatives followed by (ii) nano-self-assembling of these derivatives into spherical PS-NP. Four different conversions of cellulose acetate phthalate (CAP) into cellulose acetate (N-succinimidyl) ...
DOI:
10.1007/s10570-018-2108-5

6. Rheology of microfibrillated cellulose (MFC) suspensions: influence of the degree of fibrillation and residual fibre content on flow and viscoelastic properties

Author:
Schenker, Michel; Schoelkopf, Joachim; Gane, Patrick; Mangin, Patrice
Source:
Cellulose 2019 v.26 no.2 pp. 845-860
ISSN:
0969-0239
Subject:
cellulose; cellulose microfibrils,   etc   ; fiber content; models; pulp; rheology; viscoelasticity; viscosity;     Show all 8 Subjects
Abstract:
... The influence of the degree of fibrillation (DoF), i.e. the fibril width distribution, on the rheological properties of microfibrilated cellulose (MFC) suspensions was investigated. To extend the understanding of the dominating effect of either fibril diameter alone or diameter size distribution, flow curves (viscosity against shear rate) and viscoelastic measurements were performed on single, dou ...
DOI:
10.1007/s10570-018-2117-4

7. Contribution of different state of adsorbed water to the sub-Tg dynamics of cellulose

Author:
Zhao, Hao; Chen, Zhen; Du, Xianfeng; Chen, Lin
Source:
Carbohydrate polymers 2019 v.210 pp. 322-331
ISSN:
0144-8617
Subject:
cellulose,   etc   ; bound water; dielectric spectroscopy;     Show all 3 Subjects
Abstract:
... The contribution of different states of adsorbed water to the sub-Tg dynamics of cellulose was investigated by means of dielectric spectroscopy in couple with LF-NMR. The distribution and hydration state of adsorbed water in cellulose were determined by LF-NMR, based on which the role that different state of adsorbed water plays in typical secondary dielectric relaxations is discussed in detail. T ...
DOI:
10.1016/j.carbpol.2019.01.087

8. Study on the wet-web strength and pressability of paper sheet during the press process with the addition of nano-fibrillated cellulose (NFC)

Author:
Lu, Zonghong; An, Xingye; Zhang, Hao; Guan, Min; Liu, Jing; Sun, Yiwei; Nie, Shuangxi; Cao, Haibing; Lu, Bin; Liu, Hongbin
Source:
Carbohydrate polymers 2019 v.210 pp. 332-338
ISSN:
0144-8617
Subject:
cellulose,   etc   ; absorption; drainage; energy; paper;     Show all 5 Subjects
Abstract:
... The properties of wet-web strength and pressability of base paper affect the frequency of sheet breaks and machine runnability during the paper-making process. In this paper, the effect of nano-fibrillated cellulose (NFC) on the wet-web strength and pressability of paper sheet during the press process of paper-making was explored. It was found that the tensile energy absorption (TEA) of the sample ...
DOI:
10.1016/j.carbpol.2019.01.083

9. The analysis of the influence of the normal restitution coefficient model on calculated particles velocities by means of Eulerian-Lagrangian approach

Author:
Ludwig, Wojciech; Płuszka, Paweƚ
Source:
Powder technology 2019 v.344 pp. 140-151
ISSN:
0032-5910
Subject:
cellulose,   etc   ; computer simulation; models; powders;     Show all 4 Subjects
Abstract:
... The main aim of the research presented in the paper was to determine the sensitivity of the model describing the flow of the dispersed phase in the spout-fluid bed apparatus operating in a fast circulating dilute spout-fluid bed regime to the way of calculating the normal restitution coefficient during collisions of particles with the wall. On the basis of relevant literature, four models were sel ...
DOI:
10.1016/j.powtec.2018.12.004

10. Secondary cell wall biosynthesis

Author:
Zhong, Ruiqin; Cui, Dongtao; Ye, Zheng‐Hua
Source:
Thenew phytologist 2019 v.221 no.4 pp. 1703-1723
ISSN:
0028-646X
Subject:
cellulose; cellulose microfibrils; cellulose synthase,   etc   ; acetylation; biosynthesis; cell walls; genes; glucomannans; lignin; plasma membrane; tracheary elements; xylan;     Show all 12 Subjects
Abstract:
... Contents Summary 1703 I. Introduction 1703 II. Cellulose biosynthesis 1705 III. Xylan biosynthesis 1709 IV. Glucomannan biosynthesis 1713 V. Lignin biosynthesis 1714 VI. Concluding remarks 1717 Acknowledgements 1717 References 1717 SUMMARY: Secondary walls are synthesized in specialized cells, such as tracheary elements and fibers, and their remarkable strength and rigidity provide strong mechanic ...
DOI:
10.1111/nph.15537

11. Self-assembly of bio-cellulose nanofibrils through intermediate phase in a cell-free enzyme system

Author:
Kim, Yeji; Ullah, Muhammad Wajid; Ul-Islam, Mazhar; Khan, Shaukat; Jang, Jae Hyun; Park, Joong Kon
Source:
Biochemical engineering journal 2019 v.142 pp. 135-144
ISSN:
1369-703X
Subject:
cellulose; cellulose nanofibers; cellulose synthase,   etc   ; culture media; liquid chromatography; monitoring; nanocomposites; polymers; scanning electron microscopy; tandem mass spectrometry;     Show all 10 Subjects
Abstract:
... The current study was aimed to investigate the synthesis and self-assembly of cellulose nanofibrils in in vitro environment through intermediate phase analysis and compare with the microbial cell system. The presence and stability of cellulose synthase and other essential enzymes were qualitatively validated through liquid chromatography–mass spectrometry/mass spectrometry linear trap quadrupole ( ...
DOI:
10.1016/j.bej.2018.11.017

12. Novel fabrication of high-modulus cellulose-based films by nanofibrillation under alkaline conditions

Author:
Abe, Kentaro
Source:
Carbohydrate polymers 2019 v.205 pp. 488-491
ISSN:
0144-8617
Subject:
cellulose; cellulose microfibrils; cellulose nanofibers,   etc   ; crystal structure; films (materials); hydrogels; hydrogen bonding; milling; modulus of elasticity; neutralization; sodium hydroxide;     Show all 11 Subjects
Abstract:
... We herein propose a novel continuous process for fabricating high-modulus films based on cellulose nanofibers. In place of a dissolution process, the pulps were mechanically disintegrated into nanofibers by ball-milling in an 8% NaOH solution. NaOH treatment loosened the hydrogen bonding between the cellulose microfibrils in the pulps, and a highly concentrated suspension (8%) of cellulose nanofib ...
DOI:
10.1016/j.carbpol.2018.10.069

13. Structure/function relationships in the rosette cellulose synthesis complex illuminated by an evolutionary perspective

Author:
Haigler, Candace H.; Roberts, Alison W.
Source:
Cellulose 2019 v.26 no.1 pp. 227-247
ISSN:
0969-0239
Subject:
cellulose; cellulose microfibrils; cellulose synthase,   etc   ; bacteria; biocompatible materials; cell walls; cytoplasm; embryophytes; manufacturing; plasma membrane; polymerization; proteins; sugars;     Show all 13 Subjects
Abstract:
... Cellulose microfibrils are a key component of plant cell walls, which in turn compose most of our renewable biomaterials. Consequently, there is considerable interest in understanding how cellulose microfibrils are made in living cells by the plant cellulose synthesis complex (CSC). This remarkable multi-subunit complex contains cellulose synthase (CESA) proteins, and it is often called a rosette ...
DOI:
10.1007/s10570-018-2157-9

14. TRM4 is essential for cellulose deposition in Arabidopsis seed mucilage by maintaining cortical microtubule organization and interacting with CESA3

Author:
Yang, Bo; Voiniciuc, Cătălin; Fu, Lanbao; Dieluweit, Sabine; Klose, Holger; Usadel, Björn
Source:
Thenew phytologist 2019 v.221 no.2 pp. 881-895
ISSN:
0028-646X
Subject:
cellulose; cellulose microfibrils; cellulose synthase,   etc   ; Arabidopsis thaliana; alleles; biosynthesis; cell walls; microtubules; mucilages; reverse genetics; seed coat; transgenes; tubulin;     Show all 13 Subjects
Abstract:
... The differentiation of the seed coat epidermal (SCE) cells in Arabidopsis thaliana leads to the production of a large amount of pectin‐rich mucilage and a thick cellulosic secondary cell wall. The mechanisms by which cortical microtubules are involved in the formation of these pectinaceous and cellulosic cell walls are still largely unknown. Using a reverse genetic approach, we found that TONNEAU1 ...
DOI:
10.1111/nph.15442

15. Evaluation of bulk compression using a discrete element procedure calibrated with data from triaxial compression experiments on single particles

Author:
Jonsson, Henrik; Alderborn, Göran; Frenning, Göran
Source:
Powder technology 2019 v.345 pp. 74-81
ISSN:
0032-5910
Subject:
cellulose acetate,   etc   ; equations; mathematical models; powders; prediction;     Show all 5 Subjects
Abstract:
... Confined compression of bimodal mixtures of nearly monodisperse spherical cellulose acetate (CA) particles (diameters 1.5 and 2.0 mm) was studied numerically with the discrete element method (DEM) and experimentally using a materials tester equipped with suitable tablet tooling. An extended truncated sphere contact model was used in the simulations, enabling them to be carried out to high relative ...
DOI:
10.1016/j.powtec.2018.12.090

16. Properties of lightweight fibrous structures made by a novel foam forming technique

Author:
Burke, S. R.; Möbius, M. E.; Hjelt, T.; Hutzler, S.
Source:
Cellulose 2019 v.26 no.4 pp. 2529-2539
ISSN:
0969-0239
Subject:
cellulose,   etc   ; compression strength; foams; modulus of elasticity;     Show all 4 Subjects
Abstract:
... We describe a novel method for the production of lightweight fibrous structures of densities as low as 8.8 kg m[Formula: see text]. The method is based on the use of liquid foam as a carrier medium for dispersed Kraft fibres. Different to the process of foam forming, where the quick removal of the foam results in the formation of thin fibrous sheets, our samples are allowed to slowly drain and dry ...
DOI:
10.1007/s10570-018-2205-5

17. Treatment of recalcitrant crystalline polysaccharides with lytic polysaccharide monooxygenase relieves the need for glycoside hydrolase processivity

Author:
Hamre, Anne Grethe; Strømnes, Anne-Grethe Skaarberg; Gustavsen, Daniel; Vaaje-Kolstad, Gustav; Eijsink, Vincent G.H.; Sørlie, Morten
Source:
Carbohydrate research 2019 v.473 pp. 66-71
ISSN:
0008-6215
Subject:
cellulose,   etc   ; chitin; chitinase; glycosides; glycosidic linkages; mutants;     Show all 6 Subjects
Abstract:
... Processive glycoside hydrolases associate with recalcitrant polysaccharides such as cellulose and chitin and repeatedly cleave glycosidic linkages without fully dissociating from the crystalline surface. The processive mechanism is efficient in the degradation of insoluble substrates, but comes at the cost of reduced enzyme speed. We show that less processive chitinase variants with reduced abilit ...
DOI:
10.1016/j.carres.2019.01.001

18. Macroscopic cellulose probes for the measurement of polymer grafted surfaces

Author:
Träger, Andrea; Klein, Gregor; Carrick, Christopher; Pettersson, Torbjörn; Johansson, Mats; Wågberg, Lars; Pendergraph, Samuel A.; Carlmark, Anna
Source:
Cellulose 2019 v.26 no.3 pp. 1467-1477
ISSN:
0969-0239
Subject:
cellulose,   etc   ; adhesion; energy; molecular weight; polymerization; polymers;     Show all 6 Subjects
Abstract:
... A synthesis protocol was identified to produce covalent grafting of poly(dimethyl siloxane) from cellulose, based on prior studies of analogous ring opening polymerizations. Following this polymer modification of cellulose, the contact adhesion was anticipated to be modified and varied as a function of the polymer molecular mass. The synthetic details were optimized for a filter paper surface befo ...
DOI:
10.1007/s10570-018-2196-2

19. 3D printing using plant-derived cellulose and its derivatives: A review

Author:
Dai, Lei; Cheng, Ting; Duan, Chao; Zhao, Wei; Zhang, Weipeng; Zou, Xuejun; Aspler, Joseph; Ni, Yonghao
Source:
Carbohydrate polymers 2019 v.203 pp. 71-86
ISSN:
0144-8617
Subject:
cellulose,   etc   ; esters; ethers; feedstocks; manufacturing; polymers;     Show all 6 Subjects
Abstract:
... Three-dimensional (3D) printing is classified as a revolutionary, disruptive manufacturing technology. Cellulose (the most abundant natural polymer) and its many derivatives have been widely studied for many applications. The combination of 3D printing with cellulose-based feedstocks is therefore of critical interest. This review highlights many studies on 3D printing applications of plant-derived ...
DOI:
10.1016/j.carbpol.2018.09.027

20. Hybrid modeling of roll compaction processes with the Styl'One Evolution

Author:
Reimer, Hannah L.; Kleinebudde, Peter
Source:
Powder technology 2019 v.341 pp. 66-74
ISSN:
0032-5910
Subject:
cellulose,   etc   ; cost effectiveness; lactose; mathematical models; powders;     Show all 5 Subjects
Abstract:
... Roll compaction/dry granulation is a widely used and cost effective dry granulation method. To save time and material in formulation development, some approaches have been made to predict the most important parameters in roll compaction (RC) like gap width, specific compaction force (SCF) and ribbon solid fraction (SF).A novel approach is the hybrid modeling of roll compaction with the Styl'One Ev ...
DOI:
10.1016/j.powtec.2018.02.052