1、Development and Characterization of a Novel Environmentally
The NaOH/urea treatment not only reduced the thermal stability of the resin but also improved its curing properties and lowered its curing temperature. This research offers valuable insights for developing modified phenolic resins, which have significant practical implications.
2、氨基水杨酸改性单宁基树脂的制备及其对Ag (I)的吸附
摘要： 以杨梅单宁为原料，采用氯代的方法制备得到氯化单宁，再与氨基水杨酸反应得到氨基水杨酸改性单宁，然后经多聚甲醛交联得到氨基水杨酸改性单宁基树脂.采用傅里叶变换红外光谱仪对氨基水杨酸改性单宁基树脂的结构进行表征，并探究了溶液pH值、Ag (I)初始质量浓度、温度、时间等因素对氨基水杨酸改性单宁基树脂吸附性能的影响.结果表明，在温度为318...
3、Modification of condensed tannins: from polyphenol chemistry to
Modified tannin as an additive and a block co-polymer for thermoplastics (ultraviolet-filter), tannin-based co-polymer with enhanced biological activity, and as macro building-blocks for hybrid resins preparation are promising research areas.
4、Overview of the Synthesis, Characterization, and Application of Tannin
Adding glyoxal to tannin-based adhesives can improve the mechanical properties of composite boards. The wet shear strength of the resulting plywood is increased by 105.4% with the addition of 5-weight percent tannin-based resin with glyoxal as a cross-linker in Soy Protein Adhesive.
5、Journal of Applied Polymer Science
Larch tannin has an adverse effect on the resin curing. However, it promoted the rigidity and flexibility of the glued system and upgraded the properties of plywood. Therefore, larch tannin could be applied in the modification of urea–formaldehyde resin. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 41064.
Modified Tannin Resin
Research on modified tannin resin began in the early 20th century, when scientists started exploring chemical and physical methods to improve its properties. Early studies focused on enhancing heat and light resistance, for example, by using UV curing technology to strengthen its adhesion.
Preparation of Polyurethane Monolithic Resins and Modification with a
Resins of polyurethane were prepared from vegetable oils (crambe and castor) and modified by adding green corrosion inhibitor (condensed tannin).
Full article: Cashew nut testa tannin resin – preparation
Adsorption of metal ions and dyes from water by cashew nut testa tannin resin (CATAR) was studied and the effects of temperature, initial pH, initial concentration and time were investigated. Scanning electron microscopy (SEM) and infrared spectroscopy (FTIR) reveal effective adsorption processes.
Exploring the formaldehyde reactivity of tannins with dif
Based on the formaldehyde reactivity of tannins, bayberry tannins and larch tannins were used to explore the optimal MWD of tannins for TF resin synthesis. Progressive solvent precipitation (PSP) was used to obtain tannin fractions with different MWDs.
Preparation and Characterization of Soybean Protein Adhesives Modified
Herein, we prepared a novel, environmentally friendly soybean protein-based adhesive by adding tannin-based resin (TR) to improve the performance of water resistance and wet bonding strength.
Among nature's offerings, tannin resin stands out as an indispensable material in many industrial fields due to its unique chemical properties and biological activities. Tannin resin, a complex natural macromolecular polymer primarily composed of polyphenolic compounds, boasts excellent adhesiveness, water resistance, and corrosion resistance. these characteristics also limit its practical applications, such as high brittleness, poor heat resistance, and low light fastness. To overcome these drawbacks, scientists have employed modification technologies to significantly enhance its performance, expanding its applicability across various domains.
Research on modified tannin resin began in the early 20th century, when scientists started exploring chemical and physical methods to improve its properties. Early studies focused on enhancing heat and light resistance, for example, by using UV curing technology to strengthen its adhesion. As technology advanced, the scope of modified tannin resin expanded, revealing tremendous potential in composites, coatings, and adhesives.
The preparation processes for modified tannin resin are diverse, including chemical modification, physical modification, and biomodification. In chemical modification, introducing monomers or cross-linking agents alters the resin’s structure for superior performance. For instance, incorporating acrylates or epoxy resins can boost mechanical strength and chemical resistance. Physical modification involves adding fillers or nanomaterials to improve hardness and wear resistance, while surface treatment techniques enhance hydrophilicity and anti-fouling capabilities.
Biomodification, a rising eco-friendly approach, leverages enzymes from microbial fermentation to degrade or transform specific groups in tannin resin. For example, enzymatic hydrolysis converts hydroxyl groups into carboxyl groups, improving compatibility with polymers. Additionally, microbial fermentation can produce functional small molecules to further optimize performance.
The application prospects of modified tannin resin are vast. In construction, it serves as a high-performance adhesive and sealant material, enhancing waterproofing and moisture resistance. In automotive manufacturing, it enables lightweight yet high-strength components like engine mounts and frames. For aerospace, it forms heat-resistant and radiation-tolerant composites, meeting stringent requirements.
challenges remain. The complex chemical structure of tannin resin makes modification costly and intricate. Different methods vary in effectiveness and suitability, requiring tailored strategies for specific uses. thermal stability and light fastness still need improvement for harsher conditions.
Looking ahead, with advancements in materials science, modified tannin resin is poised to play a larger role. Through innovative research and application, we can develop more environmentally friendly, efficient, and cost-effective tannin-based materials, contributing significantly to human progress.
