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Branched plasticizers derived from eugenol via green polymerization for low/non-migration and externally/internally plasticized polyvinyl chloride materials
Waste residues of the?rosin?processing industry Eugenol Sustainable plasticizer Green polymerization
2023/11/30
The synthesis of nontoxic plasticizers derived from the waste residues of the?rosin?-processing industry can reduce pollution and promote the high-value utilization of the waste resi-dues of?rosin. In...
Design, synthesis and biological evaluation of dehydroabietic acid derivative as potent vasodilatory agents
Dehydroabietic acid Vasodilation Inflammation Endothelial nitric oxide synthasec GMP
2023/11/30
Using dehydroabietic acid as the lead compound for structural modification, 25 dehydroabietic acid derivatives were synthesized. Among them, compound D1 not only showed the strongest relaxation effect...
Bio-based epoxy vitrimer for recyclable and carbon fiber reinforced materials: Synthesis and structure-property relationship
Vitrimer Epoxy-acid-anhydride system CFRMs Degradable Recycling
2023/11/30
Recycling or degradation of epoxy resins is difficult because of their covalent cross-linking structures, which causes resource crisis, environmental pollution, and resource waste. To address this cha...
Synthesis of eugenol-modified epoxy resin and application on wood flame retardant coating
Wood Flame retardant Bio-based epoxy resin Low curing activation energy
2023/11/30
In this paper, a novel epoxy flame retardant PPDEG-EP (P-E) was synthesized from eugenol by nucleophilic substitution reaction and Prilezhaev epoxidation. The chemical structure was identified by nucl...
Exploring the effects of bound rubber phase on the physical properties of nano-silica composites with a vitrimer-like bond exchangeable matrix
DYNAMIC COVALENT CHEMISTRY CROSS-LINK DENSITY MECHANICAL-PROPERTIES POLYMER NANOCOMPOSITES
2023/11/30
We demonstrate the preparation and unique properties of composite vitrimer-like materials containing silica nanoparticles (SNPs). The matrix is composed of polyacrylate-based polymers crosslinked via ...
A Novel Polyvinyl Alcohol-Based Hydrogel with Ultra-Fast Self-Healing Ability and Excellent Stretchability Based on Multi Dynamic Covalent Bond Cross-Linking
dynamic covalent bonds hydrogels self-healing strain sensors
2023/11/30
A novel self-healing poly(vinyl alcohol) (PVA)-based hydrogel is developed by cross-linking PVA chains through multi dynamic covalent bonds by use of a small cross-linker composed by 4-formylphenylbor...
Fast and Reversible Photoresponsive Self-Assembly Behavior of Rosin-Based Amphiphilic Polymers
rosin amphiphilic polymers photo-responsive self-assembly morpholog y evolution
2023/11/30
Designing stimulus-responsive amphiphilic polymers with a fast photoresponsive self-assembly behavior remains a challenge. Two series of rosin-terminated and azobenzene-terminated amphiphilic polymers...
Fatigue of amorphous hydrogels with dynamic covalent bonds
Hydrogel Amorphous polymer network Anti-fatigue Dynamic covalent bond
2023/11/30
Hydrogels composed of amorphous polymer networks are widely used as soft and stretchable components in diverse devices and machines. However, existing amorphous hydrogels are susceptible to fatigue fr...
Mechanical properties of carbon nanotubes/epoxy nanocomposites: Pre-curing, curing temperature, and cooling rate
Carbon nanotubes curing epoxy mechanical properties nanocomposites polymer nanocomposites
2023/11/30
The effects of composite fabrication, such as pre-curing, curing temperature, and cooling rate, were studied. In this work, the pre-curing was defined as heat treatment of Multi-Walled Carbon Nanotube...
以油茶Camellia olelfera籽油为研究对象,活性炭为脱色原料,采用水浴恒温混合振荡法对油茶籽油色泽进行脱除,并探讨了脱色温度、时间及活性炭和油茶籽油配比对油茶籽油脱色程度和酸价、过氧化值的影响。结果表明,脱色时间是影响油茶籽油脱色程度、酸价和过氧化值的主要因素,最佳脱色时间为20 min;脱色温度是影响油茶籽油脱色、降低酸价和过氧化值效率的主要因素,最佳脱色温度为60℃;活性炭与植物油...
油茶果分级脱壳分选一体机研制及试验研究
茶果 脱壳 粗精选 一体机
2023/11/27
油茶属于我国特有的山茶科山茶属木本植物树种,是我国四大木本油料植物之一,也是世界四大木本油料植物之一,同时还是我国重要的食用油料。现在的油茶果脱壳仍然主要以人工脱壳方法为主,这已经远远不能满足茶油加工机械化大生产趋势的要求,国内外现在尚无成熟的油茶果脱壳清选机械设备,因此研发出效率更高和性能更好的油茶果脱壳清选机具有重要的发展意义。针对这一问题,调研了部分油茶种植企业需求,并参阅国内外果实脱壳设备...
为合理利用异叶南洋杉人工林木材,通过排水法、质量法和数值法对异叶南洋杉人工林的生材性质展开研究,结果表明,异叶南洋杉人工林木材树皮体积百分率、质量百分率、生材密度、基本密度和生材含水率的平均值分别为11.39%、13.78%、0.842 g/cm^(3)、0.394 g/cm^(3)和121.43%。随异叶南洋杉树高的增加,树皮体积百分率和质量百分率总体呈增大趋势;生材密度和基本密度总体呈下降趋势...
以日本落叶松人工林为研究对象,根据国家物理力学标准,测定日本落叶松木材的基本密度、干缩性、抗弯弹性模量、抗弯强度、冲击韧性、顺纹抗拉强度等物理力学性能,分析评价长势(优势木、平均木和劣势木)、产地(甘肃沙坝和龙门)和胸径等对日本落叶松木材物理力学性能的影响。结果表明:(1)不同长势日本落叶松的木材密度和力学强度差异不显著,劣势木、平均木、优势木的干缩率逐步递增。(2)龙门与沙坝的日本落叶松抗弯弹性...
本成果技术对杨木、杉木等人工林木材进行干燥，可显著提高木材的渗透性，快速释放锯材内残余干燥应力，减少干燥缺陷的发生，并提高木材的尺寸稳定性。与常规干燥相比，可缩短干燥周期40%以上，降低干燥成本30%以上，锯材干燥质量指标满足家具、实木复合地板及细木工板等产品制造领域的技术需求。本技术可显著提高企业的干燥生产效率，提高产品的使用性能和使用寿命,增加企业效益。
Layer-by-layer assembly of nanomultilayer structures: Reinforcement of expanded char reduced the toxicity and fire hazard of epoxy resins
Epoxy resin Fire safety Intumescent flame retardant Smoke suppression Flame retardancy
2023/11/16
Epoxy resins (EP) have been widely applied in chemical engineering, composite materials, and aerospace. Nevertheless, the high fire hazard of flammable epoxy resins, which release considerable hazardo...