CARBOHYDRATE POLYMERS
·
2024
·
IF 10.7
Yu Chen,Yuting Zhang,Juan Long,Kaimeng Xu,Tuhua Zhong
Renewable cellulose is an outstanding candidate to prepare biomass-based optical management films with tunable transparency and haze. Micro-scale and nano-scale cellulose derived from the parenchyma cells (PC) and bamboo fibers (BF) of Dendrocalamus sinicus was first separated and then subjected to succinic esterification and mechanical defibrillation using three different methods: ultrasonication, high-speed blending, and microfluidization. Sustainable multiscale optical management films with tunable haze were obtained by changing the weight ratios of micro/nanoscale cellulose. The PC-based micro/nano cellulose (MNC) films obtained by microfluidization with the highest content of nanoscale cellulose (96.5 %) displayed the highest light transmittance (89.4 %) and tensile strength (164.3 MPa) but the lowest haze (32.0 %) and anti-glare ability. The BF-based MNC films obtained by ultrasonication with the lowest content of nanoscale cellulose (20.4 %) but the highest content of microscale cellulose (79.6 %) showed the highest haze (96.7 %), a medium light transmittance (81.3 %), and the outstanding anti-glare effects. The MNC films with both high in transparency (84.8–87.5 %) and haze (81.5–88.4 %) along with good strength and flexibility can be obtained by tuning the bamboo components and mechanical defibrillation methods. This study provides a green and facile way to fabricate sustainable optical management films.
研究领域:
材料科学
·
可再生资源
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CELLULOSE
·
2018
·Vol. 25
·期 11
·6479-6494
·
IF 3.809
Jiang Yan,Liu Xiuyu,Yang Qiang,Song Xueping,Qin Chengrong,Wang Shuangfei,Li Kecheng
Abstract High (14.9%), medium (2.4%) and low (0.1%) lignin-containing cellulosic fibers were processed through a micro-grinding method to mechanically produce lignocellulose nanofibrils (LCNFs). Effects of residual lignin on the mechanical defibrillation process were investigated in terms of the nanofibrils yields, the diameters of resultant LCNFs and the micro-grinding energy consumption. The results showed that the residual lignin delayed the initial defibrillation of cellulosic fibers due to its physical barrier. However, the residual lignin eventually facilitated the defibrillation and improved the maximum nanofibrils yields by 17.9–30.8%, and greatly reduced the diameters of the resultant LCNFs from 32.9 ± 7.7 to 9.2 ± 3.3 nm. The effects of lignin on counteracting the recombination reactions between the highly reactive cellulose radicals and hindering the aggregation of defibrillated fibrils through reducing the inter-fibrillar hydrogen bonding presumably resulted in the better eventual defibrillation of cellulosic fibrils. Graphical abstract
研究领域:
材料科学
·
林业工程
✓ 已验证
DOI
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2012
·
IF 2.487
Xinlai Wei,Qiang Lu,Xianwei Sui,Zhi Wang,Ying Zhang
Water-insoluble pyrolytic cellulose with similar appearance to pyrolytic lignin was found in cellulose fast pyrolysis oil. The influence of pyrolysis temperature on pyrolytic cellulose was studied in a temperature range of 300–600 °C. The yield of the pyrolytic cellulose increased with temperature rising. The pyrolytic cellulose was characterized by various methods. The molecular weight distribution of pyrolytic cellulose was analyzed by gel permeation chromatography (GPC). Four molecular weight ranges were observed, and the M w of the pyrolytic cellulose varied from 3.4 × 10 3 to 1.93 × 10 5 g/mol. According to the elemental analysis (EA), the pyrolytic cellulose possessed higher carbon content and lower oxygen content than cellulose. Thermogravimetric analysis (TGA) indicated that the pyrolytic cellulose underwent thermo-degradation at 127–800 °C and three mass loss peaks were observed. Detected by the pyrolysis gas chromatography–mass spectrometry (Py-GC/MS), the main pyrolysis products of the pyrolytic cellulose included saccharides, ketones, acids, furans and others. Fourier transforms infrared spectroscopy (FTIR) also demonstrated that the pyrolytic cellulose had peaks assigned to C O stretching and glycosidic bond, which agreed well with the Py-GC/MS results. The pyrolytic cellulose could be a mixture of saccharides, ketones, and their derivatives.
研究领域:
生物质能
·
材料化学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Ye-Ting Wang,Yu Chai,Xiao-Ping Zheng,Ya-Peng Du,Yu-Cang Zhang,Yan-Zhen Zheng
In this study, novel biocompatible choline-organic carboxylic acid ionic liquids (Ch-OAC-ILs) were developed for pretreatment of tea stems. Among them, the combination of Ch + and levulinate achieved highest cellulose retention and most efficient lignin removal. The pretreatment mechanism were systematically explored using advanced characterization techniques and density functional theory calculations. The Ch-OAC-ILs preferentially targeted β-O-4 and β-5 linkages, yielding regenerated lignin enriched with H units. Both the cation and anion played critical roles in lignin dissolution. Furthermore, the enzyme digestibility of the pretreatment residue was significantly enhanced. The IL-lignin solution obtained after pretreatment was directly incorporated into chitosan films, where the ILs acted as plasticizers and lignin functioned as an active additive. These composite films exhibited superior UV-blocking properties with potential in functional packaging applications. This study highlights the efficacy of Ch-OAC-ILs as a sustainable and efficient method for lignin dissociation, offering a promising strategy for biomass fractionation and valorization.
研究领域:
生物质工程
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Gels
·
2025
·Vol. 11
·期 8
·631
·
IF 5.3
Yuxi Wang,Yong Yu,Shuhan Hu,Jinyao Yu,Yue Huang,Hongjie Dai
Pineapple peel cellulose nanofibrils (PCNFs) were facilely prepared by the ball milling method assisted by alkali solution (3 wt% NaOH) and a wet grinding medium, using various treated pineapple peels (hot water treatment (WT), bleaching treatment (BT), alkaline treatment (AT), and baleaching–alkaline treatment (ABT)) as raw materials. The structure of the obtained PCNFs (i.e., WT-PCNF, BT-PCNF, AT-PCNF, and ABT-PCNF) was characterized to analyze the influence of component intervention. The results indicated that NaOH-assisted ball milling did not change the crystal structure of cellulose, and the yield and thermal stability of the PCNFs was improved. The average diameters of WT-PCNF, BT-PCNF, AT-PCNF, and ABT-PCNF were 24.16, 21.53, 23.04, and 19.46 nm, respectively, in which BT-PCNF and ABT-PCNF exhibited a higher defibrillating degree and smaller diameter. Particularly, NaOH-assisted ball milling can promote the removal of non-cellulose components. The viscosity and modulus of BT-PCNF were relatively higher due to the presence of residual hemicellulose as a natural linker of fibers. The current research provides insights for simplifying the preparation and functionalization of nanocellulose.
研究领域:
材料科学
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纳米技术
·
生物高分子工程
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可持续材料
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废物资源化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Biomedical Nanotechnology
·
2017
·Vol. 13
·期 12
·1725-1734
·
IF 4.521
Ren Shuangshuang,Yao Yingfang,Zhang He,Fan Ruirui,Yu Yijun,Yang Jie,Zhang Rui,Liu Chao,Sun Weibin,Miao Leiying
The periodontal ligament (PDL) is a specific connective tissue composed of organized and aligned collagenous fibers that fix the tooth root in the alveolar bone. The alignment of PDL fibers and their function have been neglected in the past, as many studies investigated the regeneration
of the periodontium, including alveolar bone and cementum regeneration. In this study, we fabricated biodegradable aligned fibers (ε-caprolactone/collagen) by near-field electrospinning (NFE) to control the arrangement of human periodontal ligament stem cells (hPDLSCs), aiming
to guide the oriented regeneration of the periodontal ligament. Compared with random electrospun fibers, the in vitro study investigated the effects of nanotopography on stem cell differentiation of hPDLSCs. The hPDLSCs were identified by flow cytometry, and the multipotency of hPDLSCs
was confirmed by successful osteogenic induction. The hPDLSCs were co-cultured with aligned and random fibers. The cell morphology was observed by confocal micrograph and scanning electron micrograph, which showed that aligned fibers could guide the orientation and elongation of hPDLSCs. The
expression of periodontal ligament-related genes was higher when cultured with aligned fibers than when cultured with random fibers. In conclusion, via near-field electrospinning, aligned biodegradable fibers were prepared and guided the orientation arrangement of hPDLSCs, providing a better
microenvironment for periodontal ligament regeneration. This technology might be further used in the regeneration of tissues in a given direction.
研究领域:
牙科材料
·
组织工程
·
干细胞生物学
·
再生医学
✓ 已验证
DOI
PubMed
高影响因子
Advanced Healthcare Materials
·
2024
·
IF 10
Sihui Yu,Chengqiang Tang,Sijia Yu,Wenjun Li,Jiajia Wang,Ziwei Liu,Xinheng Yan,Liyuan Wang,Yiqing Yang,Jianyou Feng,Jiaqi Wu,Kailin Zhang,Hang Guan,Yue Liu,Songlin Zhang,Xuemei Sun,Huisheng Peng
Implantable sensors, especially ion sensors, facilitate the progress of scientific research and personalized healthcare. However, the permanent retention of implants induces health risks after sensors fulfill their mission of chronic sensing. Biodegradation is highly anticipated; while; biodegradable chemical sensors are rare due to concerns about the leakage of harmful active molecules after degradation, such as ionophores. Here, a novel biodegradable fiber calcium ion sensor is introduced, wherein ionophores are covalently bonded with bioinert nanoparticles to replace the classical ion-selective membrane. The fiber sensor demonstrates comparable sensing performance to classical ion sensors and good flexibility. It can monitor the fluctuations of Ca 2+ in a 4-day lifespan in vivo and biodegrade in 4 weeks. Benefiting from the stable bonding between ionophores and nanoparticles, the biodegradable sensor exhibits a good biocompatibility after degradation. Moreover, this approach of bonding active molecules on bioinert nanoparticles can serve as an effective methodology for minimizing health concerns about biodegradable chemical sensors.
研究领域:
生物传感器
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材料科学
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生物医学工程
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Yufeng Shen,Xinru Zhang,Jiangpeng Su,Lin Lin,Zeyi Jiang,Lin Qiu,Sida Wang,BingJi Wu,Changyu Pu,Xinzhi Cai,Yuqiao Liu,Xinxin Zhang
Thermally conductive cellulose-based composites have great application potential in the thermal management of portable and wearable electronic devices. In this work, cellulose-based composites with excellent mechanical and thermal properties were developed by using lysozyme-modified graphene nanoplatelets (LmGNP), epichlorohydrin (ECH), and hydrolyzed cellulose via forming strong double-cross-linked interface interactions, including the hydrogen bond network generated between LmGNP and cellulose and the chemical cross-link of ECH. As for the composites containing 8 wt % LmGNP, the in-plane thermal conductivity was 3.341 W·m–1K–1, while the tensile stress was 114.60 MPa, which increased by 297.3 and 146.2%, respectively, compared to pure cellulose. Along with the good stability, insulation, and lightweight properties, the fabricated composites have the potential to become a promising heat dissipation material for wearable electronic devices.
研究领域:
材料科学
·
复合材料
·
热管理
·
纳米技术
·
可穿戴电子
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）