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学者姓名：刘婧
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Abstract ：
Enzymatic hydrolysis of cellulose in lignocelluloses exhibits low efficiency due to low cellulose accessibility and adverse lignin effects. By using phenylsulfonic acid pretreatment to improve cellulose accessibility, we have developed several new plant proteins such as corn germ and green rapeseed proteins that extracted from inexpensive defatted meals as lignin-blockers. For pretreated lignocellulosic substrates with high cellulose accessibility, such plant proteins could effectively overcome negative lignin effects and achieve robust cellulose enzymatic conversion (88-97 %) at a low cellulase loading of 5 FPU/g glucan. To reach the same level of cellulose enzymatic conversion, adding corn germ protein could save cellulase loading by 3.6 times as compared to those without lignin-blockers. But these plant proteins showed insignificant promotion effects on substrates with low cellulose accessibility. Overall, this study coupled high cellulose-accessible substrates and efficient ligninblockers to synergistically improve the profitability of lignocellulosic biorefinery.
Keyword ：
Cellulose accessibility Cellulose accessibility Enzymatic hydrolysis Enzymatic hydrolysis Lignin-blocker Lignin-blocker Lignocellulose Lignocellulose Plant protein Plant protein
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| GB/T 7714 | Yang, Guangxu , Gong, Zhenggang , Huang, Lizhen et al. Biobased lignin-blockers enable efficient production of glucose from lignocelluloses [J]. | INDUSTRIAL CROPS AND PRODUCTS , 2023 , 205 . |
| MLA | Yang, Guangxu et al. "Biobased lignin-blockers enable efficient production of glucose from lignocelluloses" . | INDUSTRIAL CROPS AND PRODUCTS 205 (2023) . |
| APA | Yang, Guangxu , Gong, Zhenggang , Huang, Lizhen , Luo, Xiaolin , Shuai, Li , Liu, Jing . Biobased lignin-blockers enable efficient production of glucose from lignocelluloses . | INDUSTRIAL CROPS AND PRODUCTS , 2023 , 205 . |
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Lignin is a phenolic polymer, making it a sustainable alternative to phenol for synthesizing lignin-phenol-formaldehyde (LPF) adhesives. However, technical lignins produced in pulping or biorefining processes are generally highly condensed and have low reactivity, limiting their uses in synthesizing phenolic-based adhesives. Herein, we report a two-step strategy to produce lignin-based wood adhesives with industrially available technical lignins through hydrodeoxygenation followed by acid-mediated methylolation of aromatic C2/6 positions to improve the flowability, water resistance, and crosslinking ability of lignins. We demonstrated that this biobased lignin-formaldehyde adhesive had a lighter color and far better adhesion performance compared to traditional LPF resins prepared from base-mediated methylolation of lignins. Mechanistic investigation suggests that the chemical crosslinking of methylolated lignin to form diarylmethane structures and the physical interlocking interaction at the interfaces of wood veneers contribute to the strength of plywood. A biobased lignin-formaldehyde (LF) adhesive was synthesized from industrially available technical lignins through hydrodeoxygenation followed by acid-mediated methylolation of aromatic C2/C6 positions.
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| GB/T 7714 | Yang, Guangxu , Gong, Zhenggang , Zhou, Bei et al. Hydrodeoxygenation of condensed lignins followed by acid-mediated methylolation enables preparation of lignin-based wood adhesives [J]. | GREEN CHEMISTRY , 2023 , 26 (2) . |
| MLA | Yang, Guangxu et al. "Hydrodeoxygenation of condensed lignins followed by acid-mediated methylolation enables preparation of lignin-based wood adhesives" . | GREEN CHEMISTRY 26 . 2 (2023) . |
| APA | Yang, Guangxu , Gong, Zhenggang , Zhou, Bei , Luo, Xiaolin , Liu, Jing , Du, Guanben et al. Hydrodeoxygenation of condensed lignins followed by acid-mediated methylolation enables preparation of lignin-based wood adhesives . | GREEN CHEMISTRY , 2023 , 26 (2) . |
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本文概述了常规催化体系（均相和非均相）中Lewis酸（L酸）和Br?nsted酸（B酸）催化碳水化合物（三碳糖、五碳糖、六碳糖和纤维素）转化为乳酸/乳酸酯所涉及的主反应（如水解、异构、逆羟醛和氢转移等）和副反应（如脱水和缩合等）路径，以及催化剂结构与催化效率间的构效关系；综述了基于金属有机骨架（MOF）、锡基硅酸盐和石墨化的氮化碳材料构建新型非均相和光催化体系的研究进展；对复合功能型催化剂（含L酸、B酸、绑定基团和多级孔结构）的未来发展趋势进行了展望。
Keyword ：
乳酸 乳酸 乳酸酯 乳酸酯 碳水化合物 碳水化合物 质子酸 质子酸 路易斯酸 路易斯酸 非酶催化 非酶催化
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| GB/T 7714 | 卞泽伦 , 罗小林 , 帅李 et al. 碳水化合物非酶催化转化为乳酸及乳酸酯的研究进展 [J]. | 中国造纸 , 2023 , 42 (04) : 96-106 . |
| MLA | 卞泽伦 et al. "碳水化合物非酶催化转化为乳酸及乳酸酯的研究进展" . | 中国造纸 42 . 04 (2023) : 96-106 . |
| APA | 卞泽伦 , 罗小林 , 帅李 , 刘婧 . 碳水化合物非酶催化转化为乳酸及乳酸酯的研究进展 . | 中国造纸 , 2023 , 42 (04) , 96-106 . |
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Biobased furfural is a sustainable alternative to petrochemical intermediates for bulk chemicals and fuel production. However, existing methods for the conversion of xylose or lignocelluloses in mono-/bi-phasic systems to furfural involve non-selective sugar isolation or lignin condensation, limiting the valorisation of lignocelluloses. Herein, we used diformylxylose (DFX), a xylose derivative that is formed during the lignocellulosic fractionation process with formaldehyde protection, as a substitute for xylose to produce furfural in biphasic systems. Under kinetically optimized conditions, over 76 mol% of DFX could be converted to furfural in water-methyl isobutyl ketone system at a high reaction temperature with a short reaction time. Finally, isolation of xylan in eucalyptus wood as DFX with formaldehyde protection followed by converting DFX in a biphasic system gave a final furfural yield of 52 mol% (on the basis of xylan in wood), which was more than two times of that without formaldehyde. Combined with the value-added utilization of formaldehyde-protected lignin, this study would enable the full and efficient utilization of lignocellulosic biomass components and further improve the economics of the formaldehyde protection fractionation process.
Keyword ：
biphasic system biphasic system diformylxylose diformylxylose fractionation fractionation furfural furfural kinetics kinetics xylose xylose
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| GB/T 7714 | Huang, Lizhen , Bian, Zelun , Li, Dalin et al. Catalytic conversion of diformylxylose to furfural in biphasic solvent systems [J]. | FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY , 2023 , 11 . |
| MLA | Huang, Lizhen et al. "Catalytic conversion of diformylxylose to furfural in biphasic solvent systems" . | FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY 11 (2023) . |
| APA | Huang, Lizhen , Bian, Zelun , Li, Dalin , Cheng, Xin , Luo, Xiaolin , Li, Shuai et al. Catalytic conversion of diformylxylose to furfural in biphasic solvent systems . | FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY , 2023 , 11 . |
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Plywood is made of wood veneers that are bonded with adhesives such as urea-formaldehyde, phenol-formaldehyde and melamine-formaldehyde resins. The plywood made from formaldehyde-based adhesives not only releases formaldehyde but also relies on fossil resources. In this article, we synthesized furan-acetone adducts from lignocellulosic biomass in one pot. The furan-acetone adducts could be directly used as adhesives with the addition of phosphoric acid as a curing catalyst. Particularly, with the addition of 5 wt% diphenylmethane diisocyanate (MDI) as a crosslinking agent, both the wet and dry bonding strength of the plywood prepared from the adhesives could meet the minimum requirement of 0.7 MPa (Chinese National Standard GB/T 9846-2015). The possible adhesion mechanism is that the penetration of furan-acetone adhesives into vessels and cell lumens followed by crosslinking during hot-pressing forms mechanical interlocking at the interface of wood veneers, which provides the main bonding strength of plywood. The findings presented here could provide a new way for the efficient preparation of aldehyde-free green wood adhesives and the value-added utilization of woody biomass.
Keyword ：
aldol condensation aldol condensation bio-based wood adhesives bio-based wood adhesives bonding strength bonding strength furan-acetone adducts furan-acetone adducts plywood plywood
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| GB/T 7714 | Huang, Lizhen , Sun, Wenchang , Shuai, Li et al. Lignocelluloses-Based Furan-Acetone Adducts as Wood Adhesives for Plywood Production [J]. | POLYMERS , 2023 , 15 (4) . |
| MLA | Huang, Lizhen et al. "Lignocelluloses-Based Furan-Acetone Adducts as Wood Adhesives for Plywood Production" . | POLYMERS 15 . 4 (2023) . |
| APA | Huang, Lizhen , Sun, Wenchang , Shuai, Li , Luo, Xiaolin , Liu, Jing . Lignocelluloses-Based Furan-Acetone Adducts as Wood Adhesives for Plywood Production . | POLYMERS , 2023 , 15 (4) . |
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Hydroxymethylfurfural (HMF) derivatives such as 2,5-bis(hydroxymethyl)furan (BHMF) and furandicarboxylic acid (FDCA) are promising alternative of fossil-based diols and dicarboxylic acids for synthesis of polyesters such as polyethylene terephthalate (PET). However, high cost for preparing HMF from biomass discourages the commercialization of HMF-derived polyesters. Since producing furfural (FUR) from five-carbon sugars (e.g., xylose) via dehydration is an inexpensive and commercialized process, we herein reported a method to synthesize BHMF derivatives (5-(ethoxymethyl)furan-2-methanol (EMFM), 2,5-bis(hydroxymethyl)furan monoacetate (BHMFM) and 2,5-bis(hydroxymethyl)furan diacetate (BHMFD) from furfural derivatives, i.e., (2-(ethoxymethyl)furan (EMF) and furfuryl acetate (FA)). To avoid strong acid-induced side reactions (e.g., furan ring opening, condensation and carbonization), two reaction systems, i.e., a low-concentration HCl aqueous solution combined with formaldehyde and anhydrous acetic acid combined with paraformaldehyde, were found to be suitable for such a hydroxymethylation reaction and could lead to decent product yields. In order to improve the carbon utilization, condensed furanic byproducts were further converted into hydrocarbon fuels via a reported two-step hydrodeoxygenation (HDO) process. This study not only validates the possibility of synthesizing functional HMF derivatives (EMFM, BHMFM, and BHMFD) from commercially-available FUR derivatives (EMF and FA), but also provide a new way to transform condensed furanics to value-added hydrocarbon fuels.
Keyword ：
furfural derivatives furfural derivatives hydrocarbon fuel hydrocarbon fuel hydrodeoxygenation hydrodeoxygenation hydroxymethylation hydroxymethylation hydroxymethylfurfual derivatives hydroxymethylfurfual derivatives
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| GB/T 7714 | Lv, Xianqing , Luo, Xiaolin , Cheng, Xin et al. Production of Hydroxymethylfurfural Derivatives From Furfural Derivatives via Hydroxymethylation [J]. | FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY , 2022 , 10 . |
| MLA | Lv, Xianqing et al. "Production of Hydroxymethylfurfural Derivatives From Furfural Derivatives via Hydroxymethylation" . | FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY 10 (2022) . |
| APA | Lv, Xianqing , Luo, Xiaolin , Cheng, Xin , Liu, Jing , Li, Changzhi , Shuai, Li . Production of Hydroxymethylfurfural Derivatives From Furfural Derivatives via Hydroxymethylation . | FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY , 2022 , 10 . |
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对木质生物质进行预处理可破坏其致密结构、提高纤维素对酶的可及性，但预处理后残余木质素对纤维素酶产生严重的无效吸附，而探究木质素和纤维素酶间相互作用机制对于减少此种无效吸附具有重要意义。因此，本文着重概述了木质素和纤维素酶间的静电、疏水、氢键和阳离子-π作用，分析这些相互作用对预处理后固体基质进行酶水解反应的影响。基于两者间相互作用机制，进一步介绍表面活性剂、金属离子和非催化蛋白等木质素屏蔽剂降低木质素不利影响、提高预处理固体基质酶水解效率的研究进展。然而，木质素和纤维素酶间阴离子-π、π-π堆积和p-π共轭效应等非共价作用体系仍需进一步探索。总体而言，系统解析木质素与纤维素酶间的作用机制可为开发新型木质素屏蔽剂、改造酶分子结构及提高预处理效率等研究提供理论基础，促进木质纤维素燃料化学品产业的发展。
Keyword ：
木质素 木质素 木质素屏蔽剂 木质素屏蔽剂 纤维素酶 纤维素酶 阳离子-π作用 阳离子-π作用 非共价作用 非共价作用
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| GB/T 7714 | 李大林 , 黄六莲 , 陈礼辉 et al. 木质素与纤维素酶间相互作用及其抑制纤维素酶水解的研究进展 [J]. | 中国造纸学报 , 2022 , 37 (03) : 135-143 . |
| MLA | 李大林 et al. "木质素与纤维素酶间相互作用及其抑制纤维素酶水解的研究进展" . | 中国造纸学报 37 . 03 (2022) : 135-143 . |
| APA | 李大林 , 黄六莲 , 陈礼辉 , 罗小林 , 刘婧 . 木质素与纤维素酶间相互作用及其抑制纤维素酶水解的研究进展 . | 中国造纸学报 , 2022 , 37 (03) , 135-143 . |
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Lignin deposits formed on the surface of pretreated lignocellulosic substrates during acidic pretreatments can non-productively adsorb costly enzymes and thereby influence the enzymatic hydrolysis efficiency of cellulose. In this article, peanut protein (PP), a biocompatible non-catalytic protein, was separated from defatted peanut flour (DPF) as a lignin blocking additive to overcome this adverse effect. With the addition of 2.5 g/L PP in enzymatic hydrolysis medium, the glucose yield of the bamboo substrate pretreated by phenylsulfonic acid (PSA) significantly increased from 38 to 94% at a low cellulase loading of 5 FPU/g glucan while achieving a similar glucose yield required a cellulase loading of 17.5 FPU/g glucan without PP addition. Similar promotion effects were also observed on the n-pentanol-pretreated bamboo and PSA-pretreated eucalyptus substrates. The promoting effect of PP on enzymatic hydrolysis was ascribed to blocking lignin deposits via hydrophobic and/or hydrogen-bonding interactions, which significantly reduced the non-productive adsorption of cellulase onto PSA lignin. Meanwhile, PP extraction also facilitated the utilization of residual DPF as the adhesive for producing plywood as compared to that without protein pre-extraction. This scheme provides a sustainable and viable way to improve the value of woody and agriculture biomass. Peanut protein, a biocompatible non-catalytic protein, can block lignin, improve enzymatic hydrolysis efficiency and thereby facilitate the economics of biorefinery.
Keyword ：
Adsorption Adsorption Blocking Blocking Enzymatic hydrolysis Enzymatic hydrolysis Lignin deposits Lignin deposits Peanut protein Peanut protein Pretreatment Pretreatment
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| GB/T 7714 | Gong, Zhenggang , Yang, Guangxu , Song, Junlong et al. Understanding the promoting effect of non-catalytic protein on enzymatic hydrolysis efficiency of lignocelluloses [J]. | BIORESOURCES AND BIOPROCESSING , 2021 , 8 (1) . |
| MLA | Gong, Zhenggang et al. "Understanding the promoting effect of non-catalytic protein on enzymatic hydrolysis efficiency of lignocelluloses" . | BIORESOURCES AND BIOPROCESSING 8 . 1 (2021) . |
| APA | Gong, Zhenggang , Yang, Guangxu , Song, Junlong , Zheng, Peitao , Liu, Jing , Zhu, Wenyuan et al. Understanding the promoting effect of non-catalytic protein on enzymatic hydrolysis efficiency of lignocelluloses . | BIORESOURCES AND BIOPROCESSING , 2021 , 8 (1) . |
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Chemical pretreatment followed by enzymatic hydrolysis has been regarded as a viable way to produce fermentable sugars. Phenylsulfonic acid (PSA) pretreatment could efficiently fractionate the non-cellulosic components (hemicelluloses and lignin) from bamboo and result in increased cellulose accessibility that was 10 times that of untreated bamboo. However, deposited lignin could trigger non-productive adsorption to enzymes, which therefore significantly decreased the enzymatic hydrolysis efficiency of PSA-pretreated bamboo substrates. Herein, poly(N-vinylcaprolactam) (PNVCL), a non-ionic surfactant, was developed as a novel additive for overcoming the non-productive adsorption of lignin during enzymatic hydrolysis. PNVCL was found to be not only more effective than those of commonly used lignosulfonate and polyvinyl alcohol for overcoming the negative effect of lignin, but also comparable to the robust Tween 20 and bovine serum albumin additives. A PNVCL loading at 1.2 g/L during enzymatic hydrolysis of PSA pretreated bamboo substrate could achieve an 80% cellulosic enzymatic conversion and meanwhile reduce the cellulase loading by three times as compared to that without additive. Mechanistic investigations indicated that PNVCL could block lignin residues through hydrophobic interactions and the resultant PNVCL coating resisted the adsorption of cellulase via electrostatic repulsion and/or hydration. This practical method can improve the lignocellulosic enzymatic hydrolysis efficiency and thereby increase the productivity and profitability of biorefinery.
Keyword ：
enzymatic hydrolysis enzymatic hydrolysis lignin lignin non-productive adsorption non-productive adsorption phenylsulfonic acid phenylsulfonic acid poly(N-vinylcaprolactam) poly(N-vinylcaprolactam)
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| GB/T 7714 | Lv, Xianqing , Yang, Guangxu , Gong, Zhenggang et al. Using poly(N-Vinylcaprolactam) to Improve the Enzymatic Hydrolysis Efficiency of Phenylsulfonic Acid-Pretreated Bamboo [J]. | FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY , 2021 , 9 . |
| MLA | Lv, Xianqing et al. "Using poly(N-Vinylcaprolactam) to Improve the Enzymatic Hydrolysis Efficiency of Phenylsulfonic Acid-Pretreated Bamboo" . | FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY 9 (2021) . |
| APA | Lv, Xianqing , Yang, Guangxu , Gong, Zhenggang , Cheng, Xin , Shuai, Li , Huang, Liulian et al. Using poly(N-Vinylcaprolactam) to Improve the Enzymatic Hydrolysis Efficiency of Phenylsulfonic Acid-Pretreated Bamboo . | FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY , 2021 , 9 . |
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Efficient enzymatic hydrolysis of cellulose in lignocellulose to glucose is one of the most critical steps for the production of biofuels. The nonproductive adsorption of lignin to expensive cellulase highly impedes the development of biorefinery. Understanding the lignin-cellulase interaction mechanism serves as a vital basis for reducing such nonproductive adsorption in their practical applications. Yet, limited report is available on the direct characterization of the lignin-cellulase interactions. Herein, for the first time, the nanomechanics of the biomacromolecules including lignin, cellulase, and cellulose were systematically investigated by using a surface force apparatus (SFA) at the nanoscale in aqueous solutions. Interestingly, a cation-pi interaction was discovered and demonstrated between lignin and cellulase molecules through SFA measurements with the addition of different cations (Na+, K+, etc.). The complementary adsorption tests and theoretical calculations further confirmed the validity of the force measurement results. This finding further inspired the investigation of the interaction between lignin and other noncatalytic-hydrolysis protein (i.e., soy protein). Soy protein was demonstrated as an effective, biocompatible, and inexpensive lignin-blocker based on the molecular force measurements through the combined effects of electrostatic, cation-pi, and hydrophobic interactions, which significantly improved the enzymatic hydrolysis efficiencies of cellulose in pretreated lignocellulosic substrates. Our results offer quantitative information on the fundamental understanding of the lignin-cellulase interaction mechanism. Such unraveled nanomechanics provides new insights into the development of advanced biotechnologies for addressing the nonproductive adsorption of lignin to cellulase, with great implications on improving the economics of lignocellulosic biorefinery.
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| GB/T 7714 | Zheng, Peitao , Xiang, Li , Chang, Jian et al. Nanomechanics of Lignin-Cellulase Interactions in Aqueous Solutions [J]. | BIOMACROMOLECULES , 2021 , 22 (5) : 2033-2042 . |
| MLA | Zheng, Peitao et al. "Nanomechanics of Lignin-Cellulase Interactions in Aqueous Solutions" . | BIOMACROMOLECULES 22 . 5 (2021) : 2033-2042 . |
| APA | Zheng, Peitao , Xiang, Li , Chang, Jian , Lin, Qiaojia , Xie, Lei , Lan, Tu et al. Nanomechanics of Lignin-Cellulase Interactions in Aqueous Solutions . | BIOMACROMOLECULES , 2021 , 22 (5) , 2033-2042 . |
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