Preparation and characterization of hydrothermally pretreated bamboo powder with improved thermoplasticity by propargyl bromide modification in a heterogeneous system

Zhu, En-Qing; Xu, Guogang; Ye, Xin-Yao; Yang, Jing; Yang, Haiyan; Wang, Dawei; Shi, Zhengjun; Deng, Jia

doi:10.1007/s42114-021-00316-y

Cited by 22 publications

(5 citation statements)

References 45 publications

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“…In recent years, the development of polymers from renewable resources has grown incessantly both in academia and in the industry [4,8,9]. Lignin is the largest renewable source of aromatic building blocks in nature [10][11][12][13] and has signi cant potential to serve as starting material for the production of bulk or functionalized aromatic compounds to offer suitable alternatives to the universally used, petroleumderived BTX (benzene, toluene, and xylene) [14][15][16][17][18][19]. There are a large number of aromatic rings and conjugated functional groups inside the molecular structure of lignin, which allow the formation of strong conjugation and π-π molecular interactions among lignin molecules [17,[20][21][22], endowing lignin with unique optical properties including aggregation-induced emission, UV absorbance and great potential for sustainable photothermal conversion [23,24].…”

Section: Introductionmentioning

confidence: 99%

Lignin-based epoxy composite vitrimers with light-controlled remoldability

Zheng

Liu

et al. 2023

Adv Compos Hybrid Mater

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Vitrimers open new possibilities in the reprocess of epoxy and other thermosets. However, direct heating is not practical on many occasions, and the waste vitrimers would cause great harm to the environment. In this work, we propose to use kraft lignin (KL) to fabricate vitrimer with reprocessability and environmental friendliness. The lignin-based epoxy vitrimer was fabricated by blending epoxy-modi ed KL and poly(ethylene glycol) bis(carboxymethyl) ether (PEG-DCM). The obtained lignin-based epoxy vitrimer (EML/PEG-DCM) showed good light-to-heat capability. Under the infrared radiation (808 nm, 1 W cm -2 ) for only 30 s, the surface temperature of EML/PEG-DCM was over ∼148 °C, and reached the maximum at ∼231 °C for 5 min. This good light-to-heat effect can activate the dynamic 3D crosslinking networks and repair the vitrimer. The energy consumption of the light-controlled remolding process is only one-thousandth of the conventional hot-press. This study not only helps to explore the natural characteristics of lignins, promoting their functional and intelligent utilization but also provides a new raw material platform for the development of green vitrimer materials.

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Section: Introductionmentioning

confidence: 99%

Lignin-based epoxy composite vitrimers with light-controlled remoldability

Zheng

Liu

et al. 2023

Adv Compos Hybrid Mater

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“…Meanwhile, in the “Guiding Opinions of the General Office of the State Council on Promoting the Steady Growth of the Building Materials Industry” issued by the State Council of China, it is clearly proposed to “support the development of biomass building materials by using crop straw, bamboo fiber, 38 wood chips, and so forth, and develop biomass fiber reinforced wood plastic building materials and other products”. Hence, the new biomass structural functional materials developed are the most original ecological synthetic environment‐friendly materials, which conform to the direction of novel environment‐friendly synthetic materials 38–40 . However, the biomass structural functional materials constructed so far either have poor mechanical properties or rely on the synthesis of petrochemical adhesives (phenol‐formaldehyde resin or urea‐formaldehyde resin) 41 .…”

Section: Introductionmentioning

confidence: 99%

“…Hence, the new biomass structural functional materials developed are the most original ecological synthetic environment-friendly materials, which conform to the direction of novel environment-friendly synthetic materials. [38][39][40] However, the biomass structural functional materials constructed so far either have poor mechanical properties or rely on the synthesis of petrochemical adhesives (phenol-formaldehyde resin or ureaformaldehyde resin). 41 These drawbacks will not only cause accelerated consumption of petrochemical energy, but also lead to serious environmental pollution and ecological damage.…”

mentioning

confidence: 99%

Sustainable ultra‐strong thermally conductive wood‐based antibacterial structural materials with anti‐corrosion and ultraviolet shielding

Ye,

Shi,

et al. 2023

EcoMat

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In light of the uprising global development on sustainability, an innovative and environmental friendly wood‐based material derived from natural pinewood has been developed as a high‐performance alternative to petrochemical‐based materials. The wood‐based functional material, named as BC‐CaCl2, is synthesized through the coordination of carboxyl groups (−COOH) present in pinewood with calcium ions (Ca2+), which facilitates the formation of a high‐density cross‐linking structure through the combined action of intermolecular hydrogen bonds. The as‐prepared BC‐CaCl2 exhibits excellent tensile strength (470.5 MPa) and flexural strength (539.5 MPa), establishing a robust structural basis for the materials. Meanwhile, BC‐CaCl2 shows good water resistance, thermal conductivity, thermal stability, UV resistance, corrosion resistance, and antibacterial properties. BC‐CaCl2 represents a viable alternative to petrochemical‐based materials. Its potential application areas include waterproof enclosure structure of buildings, indoor underfloor heating, outdoor UV resistant protective cover, and anti‐corrosion materials for installation engineering, and so forth.image

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“…In addition, plant cells have dense and complex cell walls, and cell walls hinder the entry of chemical liquid into the fiber. In recent years, many researchers have used different methods to pretreat biomass, and different pretreatment methods have their own advantages and disadvantages [72][73][74][75][76][77][78][79][80][81][82][83]. To obtain CSB fibers, Reddy and Yang used sodium hydroxide to remove non-fibrous materials [84].…”

Section: Introductionmentioning

confidence: 99%

Effects of different amounts of cellulase on the microstructure and soluble substances of cotton stalk bark

Xie

Tian

Liu

et al. 2022

Adv Compos Hybrid Mater

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There are plant cuticle and complex cell walls on the outer surface of cotton stalk bark (CSB), which reduce the efficiency of liquid penetration of CSB. To increase the permeability of liquids, these barriers need to be broken. Cellulase can selectively hydrolyze cellulose into glucose, and its action conditions are mild. Therefore, cellulase treatment is one of the excellent ways to break the CSB liquid permeation barrier. This experiment studied the effects of different amounts of cellulase treatment on the enzymatic hydrolysis products and surface of CSB. Scanning electron microscopy (SEM) and nano-CT were used to observe the changes in the microscopic morphology of CSB. Ion chromatography and an ultraviolet–visible spectrophotometer were used to determine the dissolution of CSB. The results showed that the cuticle of CSB treated with cellulase was broken, and the cell wall of phloem fibers became thinner, which increased the accessibility of liquid. The content of monosaccharide and lignin in CSB treatment solution increased with the increase of cellulase dosage. Correspondingly, the proportion of polysaccharides on the outer surface of CSB continued to decline and eventually stabilized. These experimental results can provide a reference for improving the permeability of natural fibers and the subsequent treatment effects of biomass products. Graphical abstract The pretreatment of cotton stalk barks with cellulase destroyed the dense protective structure of cell wall, and the content of monosaccharide and lignin in the treated solution increased with the increase of cellulase dosage.

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Preparation and characterization of hydrothermally pretreated bamboo powder with improved thermoplasticity by propargyl bromide modification in a heterogeneous system

Cited by 22 publications

References 45 publications

Lignin-based epoxy composite vitrimers with light-controlled remoldability

Lignin-based epoxy composite vitrimers with light-controlled remoldability

Sustainable ultra‐strong thermally conductive wood‐based antibacterial structural materials with anti‐corrosion and ultraviolet shielding

Effects of different amounts of cellulase on the microstructure and soluble substances of cotton stalk bark

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