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Natural fiber reinforced composites: Sustainable materials for emerging applications
Natural fibers Sustainable materials Sustainability Composite materials Chemical treatments
2023/12/11
In the contemporary world,?natural fibers?reinforced polymer composite (NFRPC) materials are of great interest owing to their eco-friendly nature, lightweight, life-cycle superiority,?biodegradability...
Biobased Dynamic Polymer Networks with Rapid Stress Relaxation
dynamic polymer networks epoxidized soybean oil hydroxyl-functionalized silica stress relaxation mechanical properties
2023/12/11
Dynamic polymer networks (DPNs) from epoxidized soybean oil (ESO) that incorporate dual dynamic exchange reactions (dual-DERs) and hydroxyl-functionalized silica (HO-SiO2) reinforcement are shown to e...
Sustainable alternative for bisphenol A epoxy resin high-performance and recyclable lignin-based epoxy vitrimers
Lignin Epoxy vitrimers Self-healing Shape memory polymer
2023/12/11
Epoxy vitrimers based on dynamic covalent bond chemistry have been developed in recent years as they can solve the problem of recycling and reuse for traditional thermosetting materials. Lignin as an ...
河南农业大学专利：一种利用阔叶材制备糠醛的方法
河南农业大学 阔叶材 糠醛 制备方法
2023/12/11
本发明公开了一种利用阔叶材制备糠醛的方法，包括以下步骤：步骤1：将阔叶材木粉、低共熔溶剂（DES）、有机溶剂以固液比为1:10:10加入反应釜中，搅拌进行反应；步骤2：反应结束后，将反应釜冷却；步骤3：冷却后，进行抽滤，收集滤液；步骤4：分离含有糠醛的有机相。本发明一种利用阔叶材制备糠醛的方法成本低，产量高，适合推广运用。
河南农业大学专利：一种木质素胶黏剂及其制备方法和应用
河南农业大学 木质素 胶黏剂 制备方法
2023/12/8
本发明公开了一种木质素胶黏剂及其制备方法和应用，其中，木质素胶黏剂的制备原料包括声敏材料和树脂；声敏材料包括姜黄素、二氧化钛、铁粉、金丝桃素、竹红菌素和叶绿素中的至少一种；树脂为木质素改性酚醛树脂。本发明提供的木质素胶黏剂，能够和微波固化方法相配合，有效提高其固化的速率和均匀程度，同时提升固化后胶黏剂和基材之间的胶接强度。本发明还提供了上述木质素胶黏剂的制备方法和应用。
“Solid-Liquid” Vitrimers Based on Dynamic Boronic Ester Networks
Solid-liquid Dynamic covalent bond Boronic ester bond Strain-rate dependent High stretchability
2023/12/8
The “solid-liquid” behavior of vitrimers have not been systematically investigated. Herein, a series of “solid-liquid” vitrimers bearing varying contents of dynamic boronic ester bonds were synthesize...
Bio-based vitrimer-like polyurethane based on dynamic imine bond with high-strength, reprocessability, rapid-degradability and antibacterial ability
Bio-based polyurethane Vitrimer-like Imine bond Rapidly-degradable Antibacterial property
2023/12/8
Synthesis of vitrimer with dynamic?covalent bond?is a surprising solution to overcome the inherent limitations of traditional?thermosets. A bio-based vitrimer-like?polyurethane?formed by?castor oil,?v...
Rapid self-healing and self-adhesive chitosan-based hydrogels by host-guest interaction and dynamic covalent bond as flexible sensor
Conductive hydrogel Chitosan Poly(vinyl alcohol) Host-guest interactions Self-healing Self-adhesiveness Flexible strain sensor
2023/12/8
A sensor used to monitor tissue deformation requires good flexibility, stretchability, self-adhesion, cyto-compatibility, and?antibacterial property. Here, we prepared hydrogel sensor based on?O-carbo...
High-strength and self-healable poly (acrylic acid) /chitosan hydrogel with organic-inorganic hydrogen bonding networks
Self-healing hydrogel Hydrogen bonding Organic-inorganic
2023/12/8
Bentonite?is a natural clay mineral with high cationic exchange properties and plays an important role in organic-inorganic composite hydrogels. We report an organic-inorganic cross-linked self-healin...
Cavitation dynamics in a vitrimer
Vitrimer Cavitation dynamics Strain stifening Viscoelasticity
2023/12/8
Vitrimer is a polymer network with dynamic covalent bonds, which can be dynamically broken and reformed. Thanks to the dynamic covalent bonds, vitrimer behaves like an elastomer at high deformation ra...
国际竹藤中心专利：一种竹纳米木素防晒剂的制备方法及其应用
国际竹藤中心 竹纳米木素 防晒剂 制备方法
2023/12/7
本发明公开了一种绿色环保的竹纳米木质素防晒剂的制备方法。所述的制备方法包括以下步骤：将竹材初加工后，在对甲基苯磺酸溶液中蒸煮，经抽滤分离后获得滤液。再将滤液稀释并离心后获得竹纳米木质素溶液；最后将所得竹纳米木质素溶液经去离子水交换至近中性后，经室温气干获得竹纳米木质素防晒剂。将其添加至乳液与清漆中，制得竹纳米木质素防晒乳液与清漆。将制得的竹纳米木质素防晒乳液与清漆直接涂抹于有防晒需求的皮材料表面，...
国际竹藤中心专利：一种竹质单元质量评价设备
国际竹藤中心 竹质单元 质量评价设备
2023/12/7
本实用新型公开一种竹质单元质量评价设备，涉及竹片筛选设备技术领域，主要结构包括主机和分类架；所述主机包括机架，所述机架上设置有进口驱动机构、力学测试机构和出口驱动机构；通过力学测试机构对竹纤维带进行力学抗弯模量的测量，通过光学探头对竹纤维带进行色差分筛，使不同色差的竹纤维带从不同的分类架上掉落，从而实现对竹纤维带的分选。
国际竹藤中心专利：一种导引管和纤维抱合装置及其成纱设备和成纱方法
国际竹藤中心 导引管 纤维抱合装置 成纱设备
2023/12/7
本发明公开一种导引管和纤维抱合装置及其成纱设备和成纱方法，包括用于导流纤维的导引管内腔，其径向截面沿进料方向逐渐减小，导引管内腔的侧壁上开设有沿进料方向螺旋延伸设置的螺旋槽，且螺旋槽的螺距沿进料方向逐渐变大，一方面，径向截面逐渐减少，使得纤维进入导引管内腔后逐渐朝中间聚集，实现了纤维的聚合效果，另一方面，在进料的过程中，纤维经过螺旋槽的导向作用，边进料边梳理成同一顺向，而且螺距的加大，保证了纤维逐...
国际竹藤中心专利：一种网纹竹纤维制备机组
国际竹藤中心 网纹竹纤维 制备机组
2023/12/7
本实用新型公开一种网纹竹纤维制备机组，涉及竹纤维加工技术领域，主要结构包括机架以及设置于所述机架上的去节辊组件、碾压辊组件、去黄辊组件、去青辊组件和疏解辊组件；锯切定长、剖竹定宽后制成的原竹片经过去节、碾压、去黄、去青和疏解后最终形成网状竹纤维带。本实用新型中的网纹竹纤维制备机组能够高效率的将原竹片加工成质量一致的网状竹纤维带，大大提高了竹纤维制品的生产效率和质量。