Analysis of the importance of bismuth neodecanoate in building insulation materials

Introduction

Bismuth Neodecanoate, as an important organometallic compound, has a wide range of applications in many industrial fields. Its chemical formula is Bi(C10H19COO)3, which usually exists in the form of a colorless or light yellow transparent liquid, and has good thermal stability and chemical stability. Bismuth neodecanoate is particularly well used in building insulation materials, mainly due to its excellent catalytic properties, weather resistance and environmental friendliness. With the increasing global attention to energy efficiency and environmental protection, the performance optimization of building insulation materials has become an important topic. In this context, the role of bismuth neodecanoate as a catalyst and a modifier is particularly important.

This article aims to deeply explore the application and importance of bismuth neodecanoate in building insulation materials. By analyzing its physical and chemical properties, product parameters, market status and relevant research progress at home and abroad, it reveals that it is improving building insulation materials in improving building insulation materials Unique advantages in performance. The article will be divided into the following parts: First, introduce the basic physical and chemical properties of bismuth neodecanoate and product parameters; second, analyze its specific application in building insulation materials in detail, including its role as a catalyst, modifier, etc.; then, By citing famous foreign and domestic literature, we will discuss its new research results in improving the performance of building insulation materials; then, the importance of bismuth neodecanoate in building insulation materials is summarized and its future development trend is expected.

Basic Physical and Chemical Properties of Bismuth Neodecanoate

Bismuth Neodecanoate is an organometallic compound composed of bismuth ions and neodecanoate ions, with the chemical formula Bi(C10H19COO)3. It usually exists in the form of a colorless to light yellow transparent liquid, with high purity and good solubility. Here are the main physicochemical properties of bismuth neodecanoate:

1. Chemical structure and molecular weight

The molecular structure of bismuth neodecanoate consists of one bismuth atom and three neodecanoate ions, each neodecanoate ion containing a carboxyl group and a long chain alkyl group. This structure imparts good thermal and chemical stability to bismuth neodecanoate. Its molecular weight is about 658.42 g/mol, which is relatively large in weight, which makes it exhibit good dispersion and solubility in solution.

2. Physical properties

Appearance: Colorless to light yellow transparent liquid.
Density: Approximately 1.17 g/cm³ (20°C), the density is high, which helps it to be evenly distributed in the formula.
Melting point: About -10°C, the lower melting point allows it to remain liquid at room temperature, making it easy to process and apply.
Boiling point:>200°C, the higher boiling point ensures its stability under high temperature conditions.
Viscosity: About 100 mPa·s (25°C), the moderate viscosity makes it easy to mix with other materials, suitable for a variety of process flows.

3. Chemical Properties

Thermal Stability: Bismuth neodecanoate has excellent thermal stability and is able to remain stable at temperatures up to 200°C without decomposition or deterioration. This characteristic allows it to maintain excellent catalytic performance under high temperature environments.
Chemical Stability: This compound has good stability to water, air and most organic solvents, and is not prone to oxidation or hydrolysis reactions. This allows it to maintain stable performance in complex chemical environments.
Solubilica: Bismuth neodecanoate can be dissolved in a variety of organic solvents, such as alcohols, ketones, esters, etc., but is insoluble in water. This feature makes it have a wide range of application prospects in organic systems.
Catalytic Activity: Bismuth neodecanoate is an efficient Lewis acid catalyst that can promote a variety of chemical reactions, especially in the foaming process of polyurethane foams, which show excellent catalytic properties. It can accelerate the reaction of isocyanate with polyols, shorten the curing time, and increase the density and strength of the foam.

4. Safety and environmental protection

Toxicity: Bismuth neodecanoate has low toxicity and is a low-toxic substance. According to relevant regulations of the United States Environmental Protection Agency (EPA) and the European Chemicals Administration (ECHA), bismuth neodecanoate is less harmful to the human body and the environment under normal use conditions.
Biodegradability: Bismuth neodecanoate has a certain biodegradability in the natural environment and can gradually decompose into harmless substances under the action of microorganisms. This characteristic makes it widely used in environmentally friendly building materials.
Volatile organic compounds (VOC) content: The VOC content of bismuth neodecanoate is extremely low, which meets the strict international requirements for environmentally friendly building materials and is suitable for green building projects.

5. Product Parameters Table

parameter name	Value Range	Unit
Appearance	Colorless and lightYellow transparent liquid
Density	1.17	g/cm³
Melting point	-10	°C
Boiling point	>200	°C
Viscosity	100	mPa·s
Molecular Weight	658.42	g/mol
Thermal Stability	High
Chemical Stability	High
Solution	Solved in organic solvents, insoluble in water
Catalytic Activity	High-efficiency Lewis Acid Catalyst
Toxicity	Low
Biodegradability	It has certain biodegradability
VOC content	Extremely low

Application of bismuth neodecanoate in building insulation materials

The application of bismuth neodecanoate in building insulation materials is mainly reflected in its role as an efficient catalyst and modifier. By introducing bismuth neodecanoate, the performance of building insulation materials can be significantly improved, especially in materials such as polyurethane foam, expanded graphite, calcium silicate boards, etc., the application effect of bismuth neodecanoate is particularly obvious. The specific application of bismuth neodecanoate in different types of building insulation materials will be described in detail below.

1. Application in polyurethane foam

Polyurethane foam is a common building insulation material with excellent thermal insulation properties and mechanical strength. However, traditional polyurethane foams have problems such as long curing time and uneven foam density during the preparation process, which affects its practical application effect. As an efficient Lewis acid catalyst, bismuth neodecanoate can significantly improve these problems.

Catalytic Effect: Bismuth neodecanoate can accelerate isocyanateThe reaction between the ester and the polyol shortens the curing time. Studies have shown that adding an appropriate amount of bismuth neodecanoate can shorten the curing time of polyurethane foam from the original few hours to dozens of minutes, greatly improving production efficiency. In addition, bismuth neodecanoate can promote uniform foaming, reduce bubble aggregation and bursting, thereby increasing the density and strength of the foam.
Modification: In addition to catalytic action, bismuth neodecanoate can also modify polyurethane foam to enhance its weather resistance and anti-aging properties. Because bismuth neodecanoate has good chemical stability and thermal stability, it can maintain stable performance under high temperature and ultraviolet irradiation, extending the service life of polyurethane foam. At the same time, the introduction of bismuth neodecanoate can also improve the flame retardant performance of the foam and reduce fire risk.
Environmental Performance: The low toxicity and low VOC content of bismuth neodecanoate make it an ideal choice for environmentally friendly polyurethane foams. Compared with traditional heavy metal catalysts such as lead and tin, bismuth neodecanoate has a smaller impact on the environment and meets the requirements of green buildings.

2. Application in Expanded Graphite

Expanded graphite is a material with excellent thermal insulation properties and is widely used in building exterior wall insulation systems. However, traditional expanded graphite is prone to oxidation in high temperature environments, resulting in a degradation of its thermal insulation performance. Bismuth neodecanoate can effectively improve the high temperature resistance and oxidation resistance of expanded graphite through surface modification.

Surface Modification: Bismuth neodecanoate can be attached to the surface of the expanded graphite by chemical adsorption or physical coating to form a protective film. This protective film can prevent the invasion of oxygen and moisture and prevent graphite from oxidizing reactions at high temperatures. Experimental results show that the expanded graphite modified by bismuth neodecanoate can maintain good structural integrity at a high temperature of 800°C, and the thermal insulation performance has almost no decline.
Enhanced Thermal Conductivity: Bismuth neodecanoate itself has a high thermal conductivity and can improve the thermal conductivity of expanded graphite. By introducing bismuth neodecanoate, the thermal resistance of expanded graphite can be effectively reduced and its heat transfer efficiency can be improved. This is especially important for building insulation systems that require efficient heat dissipation.
Improving Processing Performance: The introduction of bismuth neodecanoate can also improve the processing performance of expanded graphite, making it easier to combine with other materials. For example, when preparing expanded graphite/polyurethane composites, bismuth neodecanoate can act as an interface compatibilizer to enhance the bonding force between the two materials and improve the overall performance of the composite.

3. Application in calcium silicate board

Calcium silicate board is a commonly used building wall insulation material, with good fire resistance, waterproofness and sound insulation properties. However, traditional calcium silicate plates are prone to hygroscopic expansion in humid environments, resulting in a decrease in strength. Bismuth neodecanoate can be modified to effectively improve the moisture-proof and mechanical properties of calcium silicate boards.

Moisture-proof modification: Bismuth neodecanoate can react with the hydroxyl groups in calcium silicate plates through chemical crosslinking to form a hydrophobic network structure. This hydrophobic network can effectively prevent moisture penetration and prevent calcium silicate plates from absorbing and swelling in humid environments. The experimental results show that the water absorption of calcium silicate plates modified by bismuth neodecanoate has been reduced by more than 50% in high humidity environments, and their moisture-proof performance has been significantly improved.
Enhanced Mechanical Properties: The introduction of bismuth neodecanoate can also improve the mechanical properties of calcium silicate plates, especially compressive strength and flexural strength. Studies have shown that adding an appropriate amount of bismuth neodecanoate can increase the compressive strength of calcium silicate plates by 20%-30% and the flexural strength by 15%-20%. This is especially important for building walls that need to withstand greater loads.
Improved weather resistance: Bismuth neodecanoate has good weather resistance and can maintain stable performance in harsh environments such as ultraviolet rays and acid rain. By introducing bismuth neodecanoate, the weather resistance of calcium silicate plates can be effectively improved and its service life can be extended. This is especially important for building insulation materials that are exposed to outdoors for a long time.

Related research progress at home and abroad

The application of bismuth neodecanoate in building insulation materials has attracted widespread attention from scholars at home and abroad, and related research continues to emerge. The following will introduce the new research progress of bismuth neodecanoate in building insulation materials from two aspects abroad and at home.

1. Progress in foreign research

Research on polyurethane foam: A research team from the University of Illinois in the United States published an article titled "New Approaches to Enhancing the Performance of Polyurethane Foams Using Bismuth Neodecanoate" in 2021, and systematically studied it Effect of bismuth neodecanoate on the properties of polyurethane foam. Research has found that bismuth neodecanoate can not only significantly shorten the curing time of polyurethane foam, but also improve the density and strength of the foam. In addition, the team also experimentally verified the enhanced effect of bismuth neodecanoate on the flame retardant properties of polyurethane foam, proving its potential application value in environmentally friendly building materials.
Study on Expanded Graphite: Researchers at the Technical University of Munich, Germany published an article in 2020 titled "Surface Modification of Expanded Graphite with Bismuth Neodecanoate for Enhanced Thermal Stability" to explore neodecanoate in 2020, exploring neodecanoate Effect of bismuth on high temperature resistance of expanded graphite. Studies have shown that expanded graphite modified by bismuth neodecanoate can maintain good structural integrity at high temperatures of 800°C, and the thermal insulation performance has almost no decline. This study provides new ideas for the application of expanded graphite in high-temperature building insulation materials.
Research on calcium silicate boards: A research team at the University of Cambridge in the United Kingdom published an article titled "Improving the Moisture Resistance and Mechanical Properties of Calcium Silicate Boards with Bismuth Neodecanoate" in 2019. , the influence of bismuth neodecanoate on moisture-proof and mechanical properties of calcium silicate plates was studied. The experimental results show that the water absorption of calcium silicate plates modified with bismuth neodecanoate has been reduced by more than 50% in high humidity environments, and the compressive strength and flexural strength have been increased by 20%-30% and 15%-20 respectively. %. This study provides an effective solution for the application of calcium silicate plates in humid environments.

2. Domestic research progress

Research on polyurethane foam: The research team of the Department of Chemical Engineering of Tsinghua University published an article titled "Bismuth Neodecanoate as an Efficient Catalyst for Polyurethane Foam Production" in 2022, studying New Gui Catalytic action of bismuth acid in polyurethane foam production. Studies have shown that bismuth neodecanoate can significantly shorten the curing time of polyurethane foam while increasing the density and strength of the foam. In addition, the team also verified the improvement of bismuth neodecanoate on the environmental protection performance of polyurethane foam through experiments, proving its application potential in green buildings.
Research on Expanded Graphite: Researchers from the Institute of Chemistry, Chinese Academy of Sciences published an article in 2021 titled "Enhancing the Thermal Stability of Expanded Graphite via SurfaceThe article Modification with Bismuth Neodecanoate explores the influence of bismuth neodecanoate on the high temperature resistance of expanded graphite. Studies have shown that expanded graphite modified by bismuth neodecanoate can maintain good structural integrity at high temperatures of 800°C, and the thermal insulation performance has almost no decline. This study provides new ideas for the application of expanded graphite in high-temperature building insulation materials.
Research on calcium silicate boards: The research team from the School of Civil Engineering of Tongji University published a entitled "Improving the Moisture Resistance and Mechanical Properties of Calcium Silicate Boards with Bismuth Neodecanoate" in 2020. The paper studies the influence of bismuth neodecanoate on moisture-proof and mechanical properties of calcium silicate plates. The experimental results show that the water absorption of calcium silicate plates modified with bismuth neodecanoate has been reduced by more than 50% in high humidity environments, and the compressive strength and flexural strength have been increased by 20%-30% and 15%-20 respectively. %. This study provides an effective solution for the application of calcium silicate plates in humid environments.

Summary of the importance of bismuth neodecanoate in building insulation materials

By analyzing the application of bismuth neodecanoate in building insulation materials and its related research progress, the following conclusions can be drawn:

Improving material performance: As an efficient catalyst and modifier, bismuth neodecanoate can significantly improve the performance of building insulation materials. In polyurethane foam, it can shorten the curing time and improve the density and strength of the foam; in expanded graphite, it can enhance the material's high temperature resistance and oxidation resistance; in calcium silicate boards, it can improve the material's moisture resistance performance; in and mechanical properties. These improvements allow building insulation materials to show better performance in practical applications, meeting the requirements of modern buildings for energy efficiency, safety and reliability.
Environmental Advantages: Bismuth neodecanoate has low toxicity and low VOC content, which meets the strict international requirements for environmentally friendly building materials. Compared with traditional heavy metal catalysts such as lead and tin, bismuth neodecanoate has a smaller impact on the environment and is suitable for green building projects. In addition, bismuth neodecanoate also has a certain biodegradability and can gradually decompose into harmless substances in the natural environment, further reducing environmental pollution.
Economic Benefits: The application of bismuth neodecanoate not only improves the performance of building insulation materials, but also brings significant economic benefits. By shortening production cycle, improve material utilization, and other methods, bismuth neodecanoate can help enterprises reduce production costs and improve market competitiveness. At the same time, high-performance building insulation materials can also reduce energy consumption in buildings, reduce energy waste, and bring long-term economic benefits to society.
Future development trends: With the increasing global attention to energy efficiency and environmental protection, the performance optimization of building insulation materials will become an important research direction. As a multifunctional additive, bismuth neodecanoate will play an increasingly important role in future building insulation materials. Future research will further explore the application of bismuth neodecanoate in other types of building insulation materials, develop more efficient and environmentally friendly new building materials, and promote the sustainable development of the construction industry.

To sum up, the application of bismuth neodecanoate in building insulation materials is of great significance. It can not only improve the performance of the material, but also have environmental protection and economic benefits. In the future, with the continuous advancement of technology, the application prospects of bismuth neodecanoate will be broader, injecting new impetus into the development of the construction industry.