Morphology, structure and property of high consistency mechano-enzymatic fibrillated cellulose: Effect of treatment consistency of bamboo pulp fibers

Wang, Jiajun; Xu, Haocheng; Zhang, Ying; Dai, Fukuan; Wang, Ziwei; Wang, Hankun; Zhong, Tuhua

doi:10.1016/j.indcrop.2022.115731

Cited by 6 publications

(5 citation statements)

References 27 publications

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“…This might be attributed to the fact that lipase pretreatment destroyed the fat and wax layer on the surface of wheat straw, reduced the resistance of alkali and oxygen penetration, accelerated the removal efficiency of lignin, and partially destroyed the cellulose crystallization region. After xylanase pretreatment, the hemicellulose content of the pulp decreased, which meant that the presence of amorphous components decreased [ 51 , 52 ].…”

Section: Resultsmentioning

confidence: 99%

Effects of Lipase and Xylanase Pretreatment on the Structure and Pulping Properties of Wheat Straw

et al. 2022

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Based on the reduction of environmental pollution, a biological enzyme assisted alkali-oxygen pulping method was explored to improve the delignification efficiency and fiber accessibility of wheat straw and improve the properties of wheat straw pulp. In this paper, lipase and xylanase were used to pretreat wheat straw and the effects of different enzyme types and enzyme dosage on the microstructure and pulp properties of wheat straw were investigated and experimented. The results showed that the lipase can remove fat and wax on the surface of wheat straw, while xylanase degraded the hemicellulose components, such as xylan, of wheat straw fiber, destroyed the structure of the lignin-carbohydrate complex, increasing lignin removal as a result and enhancing the impregnating, diffusion and penetration of alkali. Compared with wheat straw without enzyme pretreatment, the skeleton of wheat straw pretreated by enzyme became looser, the internal cavity appeared and the wall cavity became thin and transparent. The fines decreased obviously and the length of fibers increased. After combined pretreatment with lipase (15 U·g−1) and xylanase (15 U·g−1), the pulping performance of wheat straw was improved and the tensile index (97.37 N·m·g−1), brightness (40.9% ISO) and yield (58.10%) of the pulp increased by 12.9%, 19.9% and 9.9%, respectively. It can be seen that enzyme pretreatment is a green and effective approach to improving the alkali-oxygen pulping performance of wheat straw.

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Section: Resultsmentioning

confidence: 99%

Effects of Lipase and Xylanase Pretreatment on the Structure and Pulping Properties of Wheat Straw

et al. 2022

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“…The high-consistency mechano-enzymatic cellulose preparation was carried out in accordance with our previous work. 11 Briefly, a pre-defined amount of cellulase in buffer solution was sprayed onto shredded pulp fibers, and the enzyme dosages were 0.007 and 0.02 g/g oven-dried (OD) fibers for the two different starting materials bleached bamboo pulp fibers and lignin-containing bamboo pulp fibers, respectively. The substrate consistency of bamboo pulp fibers was 35%.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

“…7,9,10 and nanofibrillated cellulose have already been produced in large quantities during this coarse fibrillation stage but some fibers fragments and fibril bundles still existed. 11 The HCMEF approach as a pretreatment had another major remarkable advantage. Namely, unlike the severe detriment to the thermal stability of cellulose fibers pretreated by TEMPO oxidation or other chemical pretreatments, enzymatic pretreatment often yields precursors with almost retained thermal stability as well as cellulose crystallinity.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Moreover, the mechano-enzymatic fibrillation at a high-consistency strategy has proven to be energy-efficient, demanding much less energy input during microfibrilated cellulose (MFC) production, and the energy consumption was estimated to be about 600 kWh/t, several 10 times lower compared to conventional fibrillation methods (5000–30,000 kWh/t) . However, this strategy usually has a marked drawback: a broad size distribution, which resulted in the fibrillated cellulose films with much poorer mechanical performances when compared to those prepared by conventional fibrillation methods. ,, Thus, post-treatments are still needed to further refine high-consistency mechano-enzymatic fibrillated cellulose, in which most micro- and nanofibrillated cellulose have already been produced in large quantities during this coarse fibrillation stage but some fibers fragments and fibril bundles still existed …”

Section: Introductionmentioning

confidence: 99%

“…The HCMEF approach as a pretreatment had another major remarkable advantage. Namely, unlike the severe detriment to the thermal stability of cellulose fibers pretreated by TEMPO oxidation or other chemical pretreatments, enzymatic pretreatment often yields precursors with almost retained thermal stability as well as cellulose crystallinity. − To date, phosphorylation was commonly used to modify cellulose for nanocellulose production. Phosphorylation pretreatment has many advantages over the TEMPO oxidation method.…”

Section: Introductionmentioning

confidence: 99%

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High-Consistency Mechano-Enzymatic Fibrillation of Bamboo Pulp Fibers to Produce Precursors for Highly Fibrillated Cellulose and Dense Films with Multifunctionalities

Wang,

Zhang,

Wang

et al. 2023

ACS Sustainable Chem. Eng.

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High-consistency mechano-enzymatic fibrillation (HCMEF) is a green approach to producing high solid fibrillated cellulose (HSFC), in which most micro- and nanoscale fibrils can be generated. Here, the HCMEF approach was proposed to pre-fibrillate bleached- and lignin-containing pulp fibers to yield coarse HSFC as precursors that were further refined by microfluidization or phosphorylation combined with microfluidization to produce highly fibrillated cellulose with multifunctionalities. The results showed that microfluidization alone of HSFC could significantly reduce fibril diameter and narrow size distribution and considerably enhance mechanical and barrier properties of the resulting films. The post-phosphorylation followed by microfluidization generated fibrils with the highest fibrillation degree; the cast films possessed intrinsic flame-retardance and excellent oxygen barrier properties in addition to greatly improved tensile strength (up to 180 MPa). In addition, the resulting highly fibrillated lignin-containing cellulose films exhibited excellent UV-shielding performance, blocking as high as 99% UV lights while retaining moderate optical transparency (62% at 600 nm).

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Mechanically robust, thermal insulating sustainable foams fully derived from bamboo fibers through high temperature drying

Li,

Zhong,

Xiao

et al. 2024

Carbohydrate Polymers

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Morphology, structure and property of high consistency mechano-enzymatic fibrillated cellulose: Effect of treatment consistency of bamboo pulp fibers

Cited by 6 publications

References 27 publications

Effects of Lipase and Xylanase Pretreatment on the Structure and Pulping Properties of Wheat Straw

Effects of Lipase and Xylanase Pretreatment on the Structure and Pulping Properties of Wheat Straw

High-Consistency Mechano-Enzymatic Fibrillation of Bamboo Pulp Fibers to Produce Precursors for Highly Fibrillated Cellulose and Dense Films with Multifunctionalities

Mechanically robust, thermal insulating sustainable foams fully derived from bamboo fibers through high temperature drying

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