Industrial Crops and Products最新文献_第2页

Economical electrostatic assembly of halogen-free coatings imparting hydrophobic, flame-retardant, and fuel-recycling properties to wood pulp paper 经济型静电组装无卤涂料，赋予木浆纸疏水、阻燃和燃料回收特性

IF 5.6 1区农林科学 Q1 AGRICULTURAL ENGINEERING

Industrial Crops and Products

Pub Date : 2024-11-17 DOI: 10.1016/j.indcrop.2024.120078

Dongdong Tang , Yueshan He , Haowen Sun , Xie Li , Yuan Liu , Qi Wang

Fuel spills frequently result in extensive ecological damage and substantial property losses, necessitating the use of oil-water separation devices for swift recovery. These devices, however, often rely on significant quantities of organic solvents or halogenated substances during manufacturing and encounter challenges related to cost and efficiency. In this work, a simplified layer-by-layer self-assembly technique was employed to design the coating, constructing a single-layer halogen-free intumescent flame retardant coating on the surface of wood pulp paper (WPP) through the interaction between phytic acid (PA, negative charge) and polyacrylamide (PAM, positive charge). Subsequently, a fluorine-free and environmentally friendly hydrophobic encapsulation layer was built over the flame retardant coating using a Polydimethylsiloxane-tetraethoxysilane (PDMS-TEOS) system. Notably, the modified samples exhibit multi-element synergistic flame retardant properties, with a limiting oxygen index (LOI) reaching 35.1 %, and reductions in peak heat release rate (pHRR) and total heat release (THR) by 66.4 % and 48.1 %, respectively, thereby ensuring fire safety during fuel recovery. Additionally, inspired by tree root penetration, a novel fuel recovery package was developed using waste cotton wool and modified paper, significantly enhancing the recycling efficiency of the modified paper. Overall, the hydrophobic, flame-retardant wood pulp paper constructed through this coating design demonstrates high flame safety and fuel recovery efficiency, offering promising prospects for marine environmental protection and sustainable development.

燃料泄漏经常会造成广泛的生态破坏和巨大的财产损失，因此有必要使用油水分离装置进行快速回收。然而，这些装置在制造过程中往往依赖大量有机溶剂或卤化物质，在成本和效率方面面临挑战。本研究采用简化的逐层自组装技术设计涂层，通过植酸（PA，带负电荷）和聚丙烯酰胺（PAM，带正电荷）之间的相互作用，在木浆纸（WPP）表面构建单层无卤素膨胀阻燃涂层。随后，利用聚二甲基硅氧烷-四乙氧基硅烷（PDMS-TEOS）系统在阻燃涂层上建立了无氟环保型疏水封装层。值得注意的是，改性样品具有多元素协同阻燃特性，极限氧指数（LOI）达到 35.1%，峰值热释放率（pHRR）和总热释放率（THR）分别降低了 66.4% 和 48.1%，从而确保了燃料回收过程中的消防安全。此外，受树根渗透的启发，利用废棉絮和改性纸开发了一种新型燃料回收包，显著提高了改性纸的回收效率。总之，通过这种涂层设计建造的疏水性阻燃木浆纸具有很高的阻燃安全性和燃料回收效率，为海洋环境保护和可持续发展提供了广阔的前景。

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引用次数: 0

Highly stable Co@BC catalysts encapsulated in biochar for efficient lignin hydrogenolysis to valuable monophenols 封装在生物炭中的高稳定性 Co@BC 催化剂可高效地将木质素氢解为有价值的单酚

IF 5.6 1区农林科学 Q1 AGRICULTURAL ENGINEERING

Industrial Crops and Products

Pub Date : 2024-11-16 DOI: 10.1016/j.indcrop.2024.120076

Bowen Luo , Zhipeng Tian , Chao Wang , Ying Chen , Jianping Liu , Riyang Shu

The development and utilization of renewable lignin from industrial crops to produce high-value bio-based chemicals and fuels is of great significance in reducing dependence on fossil resources and promoting green chemistry. However, conventional metal-supported catalysts often suffer from poor metal dispersion and particle agglomeration during lignin conversion, resulting in insufficient catalytic activity. To address these challenges, a novel biochar-encapsulated cobalt catalyst (Co@BC) was developed in this study for efficient lignin hydrogenolysis. The catalyst formed a unique thin carbon layer structure by encapsulating cobalt nanoparticles in biochar, which enhanced metal dispersion and prevented particle agglomeration. The performance of the catalysts was systematically evaluated at different calcination temperatures. Co@BC-650 showed the best results with a lignin liquefaction degree of 79.7 % and a monophenol yield of 19.1 wt%. This yield was significantly higher than that of the supported Co/BC-650 catalyst, which only reached 15.4 wt%. The thin carbon layer not only facilitated the reduction of cobalt species at 650 °C, but also provided antioxidant protection and maintained the stability of metallic cobalt, which was essential for H₂ adsorption and activation. In addition, Co@BC-650 exhibited excellent stability with little loss of activity after 3 cycles. This study provides an efficient and sustainable method for the selective production of monophenols from renewable lignin from industrial crops, which has the potential to be widely applied for biomass conversion and large-scale sustainable chemical production.

开发和利用工业作物中的可再生木质素来生产高价值的生物基化学品和燃料，对于减少对化石资源的依赖和促进绿色化学具有重要意义。然而，传统的金属支撑催化剂在木质素转化过程中往往存在金属分散性差、颗粒团聚等问题，导致催化活性不足。为解决这些难题，本研究开发了一种新型生物炭包封钴催化剂（Co@BC），用于高效木质素氢解。该催化剂将钴纳米颗粒封装在生物炭中，形成了独特的薄碳层结构，从而提高了金属的分散性，防止了颗粒的团聚。在不同的煅烧温度下，对催化剂的性能进行了系统评估。Co@BC-650 的效果最好，木质素液化度为 79.7%，单酚产率为 19.1%。该产率明显高于支撑型 Co/BC-650 催化剂，后者的产率仅为 15.4%。薄碳层不仅促进了钴物种在 650 °C 下的还原，还提供了抗氧化保护并保持了金属钴的稳定性，这对 H2 的吸附和活化至关重要。此外，Co@BC-650 还具有极佳的稳定性，在 3 个循环后活性几乎没有降低。这项研究为从工业作物的可再生木质素中选择性生产单酚提供了一种高效且可持续的方法，有望广泛应用于生物质转化和大规模可持续化学品生产。

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引用次数: 0

Green and sustainable metal-reinforced bamboo composites with high self-bonding performances 具有高自粘结性能的绿色可持续金属增强竹复合材料

IF 5.6 1区农林科学 Q1 AGRICULTURAL ENGINEERING

Industrial Crops and Products

Pub Date : 2024-11-16 DOI: 10.1016/j.indcrop.2024.120053

Zheng Yu , Yongzhong Wu , Qunying Mou , Xiazhen Li , Ting Li , Zhiyong Cai , Lin He , Xianjun Li

Although the metallization of wood and bamboo has been successfully achieved, challenges such as low efficiency, high costs, and environmental pollution caused by liquid chemical wastes have impeded its widespread adoption in manufacturing. This study presents a novel approach to fabricating metal-reinforced bamboo composite (MRBC) with exceptional performances, utilizing bamboo residues and nano-CuO without use of adhesives. The impact of raw material characteristics, including moisture content of bamboo powder and the amount of nano-CuO additive, on functional properties such as water resistance, flame retardancy and smoke suppression of MRBC was investigated. Also, the forming mechanism of MRBC was elucidated through examination of its microstructure, chemical composition, and thermal stability. Results indicated that the MRBC containing 20 wt% nano-CuO exhibited a high modulus of rupture (MOR) of 54 MPa, an impressive modulus of elasticity (MOE) of 9.3 GPa, a notable surface hardness of 44.4 kgf/mm, and low 24 h water absorption-thickness swelling of 6.5 %, all significantly surpassing those observed in conventional panels. The MRBC exhibited a tightly wrapped, adhered, and cross-linked process under high temperature and pressure conditions, facilitated by multiple synergistic effects such as lignin melting, hydrogen bond networking, physical structure entanglement, and material redox reaction, which contributed to a dense intertwined and consolidated structure. The MRBC demonstrated exceptional structural integrity throughout the combustion process, effectively mitigating potential damage caused by structural collapse due to the incorporation of nano-CuO, which also successfully suppressed smoke and toxic CO gas emissions during combustion. The MRBC showcased advantages of environmental friendliness, water resistance, high strength, flame retardancy and smoke suppression. These attributes position it as an optimal substitute for conventional panels and make it suitable for replacing metals in specific applications. Thus, it demonstrates significant market potential and promising prospects for sustainable development.

虽然木材和竹子的金属化已经成功实现，但效率低、成本高以及液态化学废料造成的环境污染等挑战阻碍了其在制造业中的广泛应用。本研究提出了一种新方法，利用竹渣和纳米氧化铜，在不使用粘合剂的情况下，制造出性能优异的金属增强竹木复合材料（MRBC）。研究了原材料特性（包括竹粉含水率和纳米氧化铜添加剂用量）对 MRBC 防水、阻燃和抑烟等功能特性的影响。此外，还通过研究 MRBC 的微观结构、化学成分和热稳定性，阐明了 MRBC 的形成机理。结果表明，含有 20 wt% 纳米氧化钴的 MRBC 具有 54 MPa 的高断裂模量（MOR）、9.3 GPa 的惊人弹性模量（MOE）、44.4 kgf/mm 的显著表面硬度和 6.5 % 的 24 小时吸水厚度膨胀率，所有这些都大大超过了在传统面板上观察到的结果。在高温高压条件下，木质素熔化、氢键网络、物理结构缠结和材料氧化还原反应等多重协同效应的促进下，MRBC 呈现出紧密包裹、粘附和交联的过程，从而形成了致密的交织固结结构。在整个燃烧过程中，MRBC 表现出优异的结构完整性，有效减轻了因加入纳米氧化铜而导致结构坍塌的潜在损害，还成功抑制了燃烧过程中的烟雾和有毒 CO 气体排放。MRBC 具有环保、防水、高强度、阻燃和抑烟等优点。这些特性使其成为传统板材的最佳替代品，并适合在特定应用中替代金属。因此，它具有巨大的市场潜力和良好的可持续发展前景。

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引用次数: 0

Evaluation of VOC emission and flexural properties of jute fiber reinforced waterborne acrylic resin composites: The impact mechanism of hydrothermal aging 黄麻纤维增强水性丙烯酸树脂复合材料的挥发性有机化合物排放和弯曲性能评估水热老化的影响机理

IF 5.6 1区农林科学 Q1 AGRICULTURAL ENGINEERING

Industrial Crops and Products

Pub Date : 2024-11-16 DOI: 10.1016/j.indcrop.2024.119969

Suwen Li , Chunyue Fang , Donghui Zhang , Xiaoyuan Pei , Chunhong Wang , Ruosi Yan , Fei Yu , Guoli Pan

In order to reveal the effect mechanism of hydrothermal aging on jute fiber (JF)-reinforced waterborne acrylic resin (WAR) composites and broaden the application of JF in the field of composites, JF/WAR composites were prepared in this paper to explore the impact mechanism of hydrothermal aging on the flexural properties and volatile organic compound (VOC) release of composites. The results showed that the atomic kinetic energy increased with increasing temperature at 25℃, 40℃ and 60℃, and the diffusion coefficient increased by 476.88 % at 60℃. The weight loss rates were 1.53 %, 2.71 %, and 5.07 %, respectively. The weakening of the C-O peaks, O-H peaks as well as CO proved the degradation of JF and WAR. The flexural strength of the samples decreased to 63.43 MPa, 59.87 MPa, and 42.88 MPa with increasing temperature at 25℃, 40℃ and 60℃, respectively, and the flexural modulus was more sensitive to hydrothermal aging. Under short-term hydrothermal aging conditions, the composites all complied with Fick law. Water molecules diffuse, adsorb and dissolve hydrophilic VOC molecules in the pores of the composite materials. Non-Fick diffusion behaviors occurred under long-term hydrothermal aging conditions, and serious damage occurred at the interface of the fiber matrix, with fiber breakage as the main damage mode, and the transmission resistance of VOC will decrease after 1440 mins hydrothermal aging, and the release of VOC will increase significantly.

为了揭示水热老化对黄麻纤维（JF）增强水性丙烯酸树脂（WAR）复合材料的影响机理，拓宽 JF 在复合材料领域的应用，本文制备了 JF/WAR 复合材料，探讨了水热老化对复合材料弯曲性能和挥发性有机化合物（VOC）释放的影响机理。结果表明，在 25℃、40℃ 和 60℃时，原子动能随温度升高而增加，60℃时扩散系数增加了 476.88%。重量损失率分别为 1.53 %、2.71 % 和 5.07 %。C-O 峰、O-H 峰和 CO 峰的减弱证明了 JF 和 WAR 的降解。在 25℃、40℃和 60℃条件下，随着温度的升高，样品的抗折强度分别降低到 63.43 MPa、59.87 MPa 和 42.88 MPa，抗折模量对水热老化更为敏感。在短期水热老化条件下，复合材料均符合菲克定律。水分子在复合材料孔隙中扩散、吸附并溶解亲水性挥发性有机化合物分子。在长期水热老化条件下，出现了非 Fick 扩散行为，纤维基体界面出现严重破坏，纤维断裂是主要的破坏方式，水热老化 1440 分钟后，VOC 的透射阻力下降，VOC 的释放量显著增加。

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引用次数: 0

pH-shifting and sonication synergistically altered cottonseed protein: Correlating the conformational and functional characteristics pH偏移和超声协同改变了棉籽蛋白：构象和功能特征的相关性

IF 5.6 1区农林科学 Q1 AGRICULTURAL ENGINEERING

Industrial Crops and Products

Pub Date : 2024-11-16 DOI: 10.1016/j.indcrop.2024.120043

Mokhtar Dabbour , Asmaa Hamoda , Haining Xu , Benjamin K. Mintah , Hafida Wahia , Garba Betchem , Yolandani , Ronghai He , Haile Ma , Mohammad Fikry

pH-shifting (pH 1.5, 3.5, 9.5, 11.5) and sonication were exclusively and synergistically used to produce cottonseed meal protein (CSMP) with modified structure and improved functionality. Conventionally extracted CSMP served as control. Combined pH-shifting and sonication considerably reduced the β-sheet (40 – 27 %), but increased random coil (12 – 34 %) and β-turn (25 – 35 %) content of CSMP, suggesting partial unfolding in the secondary structure of the protein. From scanning electron microscopy and UV-VS spectroscopy data, the synergistic use of alkaline pH-shifting and ultrasonication resulted in the production of CSMP that had disintegrated microstructure and smaller particle sizing, with higher peak absorption, compared with the control; indicating the collapse of intramolecular hydrogen bonds and interactive forces among CSMP molecules. Further, pH-shifting and/or ultrasonication remarkably strengthened sulfhydryl clusters and surface hydrophobicity, but decreased the disulfide bonds and lightness of CSMP. Most importantly, combined treatment at alkaline conditions increased absolute surface charge, solubility, foamability, and oil binding efficacy over control, and pH-shifting alone (p < 0.05). Contrarily, CSMP isolates modified with sequential treatment displayed a reduction in foaming stability (supported by foaming morphology) and water holding efficacy. Overall, the findings indicated that synergistic pH-shifting/sonication may help increase the utilization of CSMP in the development of new food ingredients.

通过改变 pH 值（pH 值为 1.5、3.5、9.5、11.5）和超声波的独特协同作用，生产出了具有改良结构和改进功能的棉籽粕蛋白（CSMP）。传统提取的 CSMP 作为对照。结合使用 pH 值变换和超声处理，大大降低了 CSMP 的 β-片状结构（40 - 27 %），但增加了无规线圈（12 - 34 %）和 β-匝结构（25 - 35 %）的含量，这表明蛋白质的二级结构发生了部分折叠。从扫描电子显微镜和紫外可见光谱数据来看，与对照组相比，在碱性 pH 值移动和超声波处理的协同作用下，生成的 CSMP 微观结构解体，粒径变小，吸收峰值变高，表明 CSMP 分子内氢键和分子间相互作用力崩溃。此外，pH 值变化和/或超声处理显著增强了巯基簇和表面疏水性，但降低了二硫键和 CSMP 的亮度。最重要的是，与对照组和单独进行 pH 值转换相比，在碱性条件下进行联合处理可增加绝对表面电荷、溶解性、发泡性和油脂结合效力（p <0.05）。相反，经连续处理改性的 CSMP 分离物的发泡稳定性（通过发泡形态证明）和持水功效有所降低。总之，研究结果表明，在开发新的食品配料时，协同 pH 值转换/超声处理可能有助于提高 CSMP 的利用率。

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引用次数: 0

New insights into ethylene-induced latex flow in a dose-dependent manner in rubber tree 对乙烯以剂量依赖方式诱导橡胶树乳胶流动的新认识

IF 5.6 1区农林科学 Q1 AGRICULTURAL ENGINEERING

Industrial Crops and Products

Pub Date : 2024-11-16 DOI: 10.1016/j.indcrop.2024.120012

Jiong Wan , Ruishen Fan , Wenfeng Yang , Fang Wei , Honghua Gao , Hong Wei , Jian Qiu

Ethylene enhances latex flow and latex regeneration in rubber trees. The physiological regulation of ethylene-stimulated latex flow mainly involves processes such as alleviating laticifer plugging, prolonging latex flow duration, increasing laticifer turgor pressure, and enhancing latex stability. The molecular mechanisms underlying these physiological effects, particularly those related to the ethylene signaling transduction pathway, remain unclear. This study aims to establish the link between these physiological changes and specific genes in the ethylene signaling pathway. We identified four ethylene dose-dependent response factors, namely HbRAP2.3, HbERF110, HbERF3, and HbERF1B, and a cluster of ethylene dose-dependent genes, including those encoding enzymes involved in latex stability, such as HbPMCA4 and HbGCL, and those involved in latex coagulation, such as HbGLU14 and HbECH. These genes exhibit a similar expression pattern with these ethylene dose-dependent response factors, and the promoter region of some contains the "GCC-box", the core sequence for ERFs binding. This suggests that they may be directly regulated by these ethylene dose-dependent response factors. Additionally, we cloned HbRAP2.3, which can activate the expression of latex flow-related genes HbGLU14 and HbECH. These findings provide novel insights into the intricate relationship between ethylene signaling and latex flow in rubber trees, laying the foundation for future research aimed at optimizing latex yield.

乙烯可促进橡胶树的乳胶流动和乳胶再生。乙烯刺激乳胶流动的生理调控主要涉及减轻胎生层堵塞、延长乳胶流动持续时间、增加胎生层张力压力和提高乳胶稳定性等过程。这些生理效应的分子机制，尤其是与乙烯信号转导途径有关的机制，目前仍不清楚。本研究旨在建立这些生理变化与乙烯信号转导途径中特定基因之间的联系。我们发现了四个乙烯剂量依赖性反应因子，即 HbRAP2.3、HbERF110、HbERF3 和 HbERF1B，以及一组乙烯剂量依赖性基因，包括编码参与乳胶稳定性的酶的基因，如 HbPMCA4 和 HbGCL，以及参与乳胶凝固的基因，如 HbGLU14 和 HbECH。这些基因与这些乙烯剂量依赖性反应因子表现出相似的表达模式，其中一些基因的启动子区域包含 "GCC-box"，即与ERFs结合的核心序列。这表明它们可能直接受这些乙烯剂量依赖性响应因子的调控。此外，我们还克隆了 HbRAP2.3，它能激活乳胶流动相关基因 HbGLU14 和 HbECH 的表达。这些发现为了解橡胶树中乙烯信号传导与乳胶流动之间错综复杂的关系提供了新的视角，为今后旨在优化乳胶产量的研究奠定了基础。

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引用次数: 0

Agricultural waste valorisation – Novel Areca catechu L. residue blended with PVA-Chitosan for removal of chromium (VI) from water – Characterization, kinetics, and isotherm studies 农业废弃物的价值利用 - 新型 Areca catechu L. 残留物与 PVA-Chitosan 混合用于去除水中的铬 (VI) - 表征、动力学和等温线研究

IF 5.6 1区农林科学 Q1 AGRICULTURAL ENGINEERING

Industrial Crops and Products

Pub Date : 2024-11-16 DOI: 10.1016/j.indcrop.2024.120013

Jasmine Jose , CJ Binish , Jobish Johns , Sony J. Chundattu , AV Vijayasankar

Arecanut, an industrial crop prevalent in tropical regions such as India, Sri Lanka, and parts of Southeast Asia, generates significant agricultural waste during processing. This study explores a waste-to-wealth approach by incorporating arecanut organic residue into Polyvinyl alcohol (PVA) - Chitosan blends via an eco-friendly continuous stirring method to develop an adsorbent film for removing chromium (VI) from water. Morphological analyses confirmed enhanced surface area, porosity, and roughness in the blended films. XRD and FTIR analyses indicated a semi-crystalline nature with a decrease in the characteristic peak intensity of PVA and chitosan, confirming the incorporation of arecanut residue. Optimal conditions identified OR-4 film, using 0.4 g of adsorbent, achieving 88.68 % removal of 173 mg/L chromium (VI) at pH 9.0, within 45 minutes at 40°C. SEM images demonstrated significant surface roughness reduction before and after adsorption, confirming chromium adsorption. Kinetic studies revealed a pseudo-second-order model and adsorption isotherms confirmed film surface heterogeneity. This research advances eco-friendly materials for water purification and offers a sustainable solution for managing agricultural residues.

油甘果是一种盛产于热带地区（如印度、斯里兰卡和东南亚部分地区）的工业作物，在加工过程中会产生大量农业废弃物。本研究探索了一种变废为宝的方法，即通过环保型连续搅拌法将油甘籽有机残渣加入聚乙烯醇（PVA）-壳聚糖混合物中，以开发一种用于去除水中铬（VI）的吸附膜。形态分析表明，混合薄膜的表面积、孔隙率和粗糙度都有所提高。X 射线衍射和傅立叶变换红外分析表明，PVA 和壳聚糖具有半结晶性质，其特征峰强度有所下降，这证实了添加了坚果残渣。最佳条件确定了 OR-4 薄膜，使用 0.4 克吸附剂，在 pH 值为 9.0、温度为 40°C 的条件下，45 分钟内对 173 毫克/升铬（VI）的去除率达到 88.68%。SEM 图像显示，吸附前后表面粗糙度明显降低，证实了铬的吸附作用。动力学研究揭示了一个伪二阶模型，吸附等温线证实了薄膜表面的异质性。这项研究推动了用于水净化的环保材料的发展，并为管理农业残留物提供了一种可持续的解决方案。

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引用次数: 0

Improving the performance of lipases in the full hydrolysis of residual coconut oil by immobilization on hydrophobic supports 通过固定在疏水支持物上提高脂肪酶在完全水解残留椰子油中的性能

IF 5.6 1区农林科学 Q1 AGRICULTURAL ENGINEERING

Industrial Crops and Products

Pub Date : 2024-11-16 DOI: 10.1016/j.indcrop.2024.120014

Rodolpho R.C. Monteiro , F. Murilo T. de Luna , Diego Lomonaco , Roberto Fernandez-Lafuente , Rodrigo S. Vieira

The effect of the immobilization via interfacial activation on hydrophobic supports of lipase A from Candida antarctica (CALA) and Eversa Transform 2.0 (ETL) in the hydrolysis of residual coconut oil is herein explored. Firstly, some important process parameters (biocatalyst content, substrates ratio, reactor temperature and stirring) were evaluated using the Taguchi method for both free biocatalysts. For free ETL, it was possible to reach full hydrolysis after 6 h under optimized reaction conditions (9 wt% of ETL, 1:2 (oil/water, w/w), 50 °C and 180 rpm). For free CALA, reaching full hydrolysis was not possible under the same optimized reaction conditions, even after 24 h of reaction. Then, ETL and CALA were immobilized by interfacial activation on a methacrylate macroporous resin particles containing octadecyl groups. After reaction conditions optimization by the Taguchi method, immobilized ETL (ETL@C18) reached full hydrolysis under the same optimized reaction conditions of free ETL, but in only 3 h. Immobilized CALA (CALA@C18), reached full hydrolysis (>99 %) after 24 hours under optimized reaction conditions which was not possible employing free CALA (56 %). Finally, under optimized reaction conditions, ETL@C18 retained 85 % of its initial activity after 10 consecutive hydrolysis cycles, whereas CALA@C18 retained less than 50 % of its initial activity after 5 consecutive hydrolysis cycles.

本文探讨了在水解残留椰子油的过程中，通过界面活化在疏水性载体上固定来自南极念珠菌的脂肪酶 A（CALA）和 Eversa Transform 2.0（ETL）的效果。首先，采用田口方法对两种游离生物催化剂的一些重要工艺参数（生物催化剂含量、底物比例、反应器温度和搅拌）进行了评估。对于游离 ETL，在优化的反应条件（9 wt%的 ETL、1:2（油/水，w/w）、50 °C 和 180 rpm）下，6 小时后即可达到完全水解。对于游离 CALA，在相同的优化反应条件下，即使经过 24 小时的反应，也无法达到完全水解。然后，通过界面活化将 ETL 和 CALA 固定在含有十八烷基的甲基丙烯酸酯大孔树脂颗粒上。通过田口方法优化反应条件后，在与游离 ETL 相同的优化反应条件下，固定化 ETL（ETL@C18）仅用 3 小时就达到了完全水解。在优化的反应条件下，固定化 CALA（CALA@C18）在 24 小时后达到完全水解（99%），而游离 CALA 则无法达到这一目标（56%）。最后，在优化的反应条件下，ETL@C18 在连续 10 个水解循环后保留了 85% 的初始活性，而 CALA@C18 在连续 5 个水解循环后保留的初始活性不到 50%。

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引用次数: 0

A comparative study of oilseed cakes as hydrophobic feedstocks for sophorolipid production by solid-state fermentation 将油籽饼作为固态发酵法生产槐脂的疏水性原料的比较研究

IF 5.6 1区农林科学 Q1 AGRICULTURAL ENGINEERING

Industrial Crops and Products

Pub Date : 2024-11-16 DOI: 10.1016/j.indcrop.2024.120059

Estefanía Eras-Muñoz, Xavier Font, Teresa Gea

The sustainable production of sophorolipids (SLs) has promoted the use of alternative agricultural byproducts and residues as nutrient sources. Corn, sunflower, soybean, and rapeseed oilseed cakes have been studied as newer hydrophobic feedstocks for SL production through solid-state fermentation using the wild-type strain of Starmerella bombicola. Maximum sophorolipid production at 0.5-L bioreactors was found to be reached by corn cake (0.743 ± 0.038 gSL g⁻¹Fat_i). HPLC analysis revealed that the composition of the hydrophobic substrate influences the profile and distribution of SL congeners. Emulsification and oil displacement tests were performed for the crude extracts showing that emulsification stability is influenced by SLs crude extract concentration. The best-performing oilseed cakes were scaled-up in a 22-L bioreactor demonstrating that the increase in scale by 44 times-maintained SLs production. The temperature influence was discussed, and the reproducibility of the method was confirmed. Outcomes highlighted a linear relation between initial fat concentration and SLs crude extract production.

槐脂（SL）的可持续生产促进了替代性农副产品和残留物作为营养源的使用。玉米、向日葵、大豆和菜籽油饼已被研究为较新的疏水性原料，通过使用野生型星形菌株进行固态发酵生产SL。在 0.5 升的生物反应器中，玉米饼的槐脂产量最高（0.743 ± 0.038 gSL g-1Fati）。高效液相色谱分析显示，疏水基质的成分会影响 SL 同系物的特征和分布。对粗提取物进行的乳化和油置换测试表明，乳化稳定性受 SLs 粗提取物浓度的影响。在一个 22 升的生物反应器中对表现最好的油籽饼进行了放大，结果表明，放大 44 倍后仍能保持 SLs 的产量。讨论了温度的影响，并确认了该方法的可重复性。结果表明，初始脂肪浓度与 SLs 粗提取物产量之间存在线性关系。

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引用次数: 0

Perdurable antimicrobial and ultraviolet-blocking cotton fabric by one-step eco-friendly strategy 一步到位的环保策略：耐用抗菌、阻挡紫外线的棉织物

IF 5.6 1区农林科学 Q1 AGRICULTURAL ENGINEERING

Industrial Crops and Products

Pub Date : 2024-11-16 DOI: 10.1016/j.indcrop.2024.120038

Chuhang Bai , Xin Yuan , Yihong Cao , Ziyun Hao , Liping Pan , Jing Peng , Nan Liu , Shiguo Chen

Cotton fabric (CF) is closely related to human life, while its inherent porous structure makes it unable to effectively shield the strong ultraviolet (UV) irradiation, and its superior hygroscopicity provides a favorable environment for microbes, resulting in microbes’ proliferation on CF. The UV irradiation and microbes’ proliferation affect the service life of CF and harm seriously human health. Therefore, developing antimicrobial and UV-blocking fabrics is for the well-being of human. Herein, a novel reactive monochlorotriazine terminated quaternary ammonium salt and benzophenone derivative (BCQ) was synthesized to covalently bind onto CF to fabricate an antimicrobial and UV-blocking CF without compromising its intrinsic physicochemical properties and biocompatibility. The antimicrobial rates of CF finished with 10.0 mg/mL BCQ were higher than 99.99 % against both E.coli and S.aureus, and its antimicrobial rates still were greater than 96 % even after 50 washes, while the cell survival rate was more than 99.5 %. Additionally, the UVA and UVB values were less than 0.5 %, and the UPF value CF finished with 50.0 mg/mL BCQ were up to 210.92. Therefore, we provide a strategy for developing an antimicrobial and UV-blocking CF.

棉织物（CF）与人类生活息息相关，但其固有的多孔结构使其无法有效屏蔽强烈的紫外线（UV）照射，而其优越的吸湿性又为微生物提供了有利环境，导致微生物在 CF 上大量繁殖。紫外线的照射和微生物的繁殖会影响 CF 的使用寿命，严重危害人体健康。因此，开发抗菌和阻隔紫外线的织物是为了人类的福祉。在此，我们合成了一种新型反应性单氯三嗪季铵盐和二苯甲酮衍生物（BCQ），将其共价结合到 CF 上，从而在不影响 CF 固有理化性质和生物相容性的前提下，制造出抗菌和阻隔紫外线的 CF。添加了 10.0 mg/mL BCQ 的 CF 对大肠杆菌和金黄色葡萄球菌的抗菌率均高于 99.99%，即使经过 50 次洗涤，其抗菌率仍大于 96%，而细胞存活率则超过 99.5%。此外，UVA 和 UVB 值均小于 0.5%，使用 50.0 mg/mL BCQ 后的 CF UPF 值高达 210.92。因此，我们为开发抗菌和阻隔紫外线的 CF 提供了一种策略。

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