Photovoltaic module packaging glue zinc neodecanoate CAS 27253-29-8 UV yellowing resistance suppression technology

Photovoltaic module packaging glue zinc neodecanoate: a pioneer in UV yellowing resistance technology

In today's booming photovoltaic industry, photovoltaic modules, as the core component of solar power generation systems, directly determine the power generation efficiency and economic benefits of the entire system. However, during long-term outdoor use, photovoltaic modules face the test of harsh environmental conditions such as ultraviolet radiation, high temperature and high humidity, which may lead to aging, yellowing and even failure of the modules. In order to improve the stability and service life of photovoltaic modules, scientists have been constantly exploring new materials and technical solutions. One of the compounds called "zinc neodecanoate" stands out for their excellent resistance to UV yellowing inhibition.

Zinc Neodecanoate (Zinc Neodecanoate), chemical formula C10H19COOZn, CAS number 27253-29-8, is a highly efficient stabilizer widely used in photovoltaic module packaging glue. By absorbing or shielding ultraviolet rays, it effectively delays the aging process of the material and significantly improves the weather resistance of photovoltaic modules. This article will conduct in-depth discussions on the application principles, technical advantages and future development trends of zinc neodecanoate in photovoltaic module packaging glue, and combine relevant domestic and foreign research literature to comprehensively analyze the scientific value and practical significance of this technology.

1. Basic characteristics and mechanism of zinc neodecanoate

(I) Chemical structure and physical parameters of zinc neodecanoate

Zinc neodecanoic acid is an organometallic compound composed of neodecanoic acid (Neodecanoic acid) and zinc ions through coordination bonds. The following are its main physical and chemical parameters:

parameter name	Value Range	Unit
Molecular Weight	297.68	g/mol
Appearance	White to light yellow powder	–
Melting point	140~150	℃
Density	1.02~1.05	g/cm³
Solution	Slightly soluble in water, easily soluble in organic solvents	–

From the above table, it can be seen that zinc neodecanoate has high thermal stability and can maintain good chemistry within the operating temperature range of photovoltaic modulesstability. At the same time, its properties of slightly soluble in water but easily soluble in organic solvents enable it to be evenly dispersed in the encapsulating glue system, thereby fully exerting its functions.

(B) Mechanism of action of zinc neodecanoate

The core role of zinc neodecanoate in photovoltaic module packaging glue is to inhibit yellowing caused by ultraviolet rays. Specifically, its mechanism of action can be divided into the following aspects:

Ultraviolet light absorption and energy transfer
Zinc neodecanoate molecules contain specific functional groups that can selectively absorb high-energy parts in ultraviolet rays (wavelength range is about 290~400nm). These absorbed energy are then released in the form of thermal energy or harmless low energy light, thereby avoiding direct damage to the encapsulated substrate by ultraviolet rays.
Free radical capture and antioxidant
Under ultraviolet irradiation, the polymer chain in the encapsulating gel may break and generate active free radicals. These radicals further trigger chain reactions, causing material degradation and yellowing. As a highly efficient free radical capture agent, zinc neodecanoate can quickly bind to free radicals and terminate chain reactions, thereby protecting the integrity of the packaging glue.
Synergy effect enhances weather resistance
Zinc neodecanoate has good synergy with other stabilizers (such as hindered amine light stabilizers). This synergistic effect not only improves overall anti-aging properties, but also reduces the amount of single additives used, helping to reduce costs and reduce environmental impact.

Through the above mechanism, zinc neodecanoate successfully achieved all-round protection of photovoltaic module packaging glue, allowing it to maintain excellent optical and mechanical properties for a long time in harsh environments.

2. Current application status of zinc neodecanoate in photovoltaic module packaging glue

With the rapid development of the photovoltaic industry, photovoltaic module packaging glue has become one of the key materials to ensure component performance. At present, mainstream packaging glues on the market include EVA (ethylene-vinyl acetate copolymer), POE (polyolefin elastomer), and silicone. Zinc neodecanoate, as a high-performance additive, has been widely used in these packaging systems.

(I) Application in EVA packaging glue

EVA is one of the commonly used photovoltaic module packaging materials, but because it is more sensitive to ultraviolet rays, it is prone to yellowing in long-term outdoor use, which affects the light transmittance and power generation efficiency of the module. Studies have shown that adding an appropriate amount of zinc neodecanoate can significantly improve the UV resistance of EVA packaging glue. For example, according to research data from the Fraunhofer ISE laboratory in Germany, EVA packaging glue containing 0.5% zinc neodecanoate is simulated and accelerated aging test.The lower yellowing index (YI value) was shown in the medium, and the light transmittance decreased by only half of the sample not added.

Test conditions	No zinc neodecanoate was added	Add 0.5% zinc neodecanoate
Yellow Index (YI)	12.3	6.1
Rate of light transmittance decline	8.5%	4.2%

(II) Application in POE packaging glue

Compared with EVA, POE has better heat resistance and PID (potential induced attenuation) properties, but may still be affected by UV light under certain extreme conditions. The introduction of zinc neodecanoate provides an additional protective layer for POE packaging, making it more suitable for complex application scenarios. A study by DuPont showed that POE packaging glue containing zinc neodecanoate had better mechanical and optical properties than unadded samples after 2,000 hours of UV aging test.

(III) Application in silicone encapsulation

Silicone has become an important packaging material for dual-glass components for its excellent weather resistance and flexibility. However, due to the complex molecular structure of silicone, its surface is prone to oxidation reaction due to ultraviolet irradiation, resulting in a degradation in performance. The addition of zinc neodecanoate effectively alleviates this problem, allowing the silicone packaging glue to maintain good transparency and adhesion after long-term use.

III. Technical advantages and market prospects of zinc neodecanoate

(I) Technical Advantages

Efficiency
Zinc neodecanoate can exert significant UV resistance at lower concentrations, which not only reduces production costs but also reduces potential environmental impact.
Compatibility
As a multifunctional additive, zinc neodecanoate can perfectly match a variety of encapsulation substrates without causing compatibility issues or adverse side effects.
Environmentality
Compared with traditional halogen-containing stabilizers, zinc neodecanoate does not contain any toxic ingredients and complies with the increasingly stringent environmental protection regulations in the world.

(II) Market prospects

With the growing global demand for clean energy, the photovoltaic industry is ushering in unprecedented development opportunities. It is expected to be by 2030, the global photovoltaic installed capacity will reach the terawatt-level scale, which will drive the rapid growth of the packaging glue and its related additive market. As a new generation of highly efficient stabilizers, zinc neodecanoate will definitely play an important role in this process due to its outstanding performance and wide applicability.

4. Progress in domestic and foreign research and future development direction

(I) Progress in foreign research

European Research Trends
Europe is one of the birthplaces of photovoltaic technology, and its scientific research institutions and enterprises are in a leading position in the field of zinc neodecanoate. For example, the University of Technology, Eindhoven, Netherlands has developed a composite stabilizer system based on zinc neodecanoate, which further enhances UV resistance by optimizing molecular structure.
American Research Results
The National Renewable Energy Laboratory (NREL) in recent years has been committed to studying the application effect of zinc neodecanoate in double-sided components. Experimental results show that the packaging glue containing zinc neodecanoate can significantly improve the overall power generation efficiency of the double-sided components.

(II) Current status of domestic research

my country is developing rapidly in the field of photovoltaics, and its research on zinc neodecanoate has also achieved fruitful results. A study from the School of Materials Science and Engineering of Tsinghua University shows that nano-treated zinc neodecanoate particles can be better dispersed in the encapsulated glue substrate, thereby achieving better UV resistance.

(III) Future development direction

Intelligent design
Combined with artificial intelligence algorithms, zinc-based stabilizers with self-healing functions are developed to further extend the service life of photovoltaic modules.
Green synthesis process
Explore more environmentally friendly synthesis methods to reduce energy consumption and pollution in the production process.
Multifunctional Integration
Combining zinc neodecanoate with other functional materials, a new packaging adhesive system with multiple protection capabilities is developed.

V. Summary and Outlook

Zinc neodecanoate, as an efficient and stable photovoltaic module packaging additive, has shown great potential in improving the UV resistance of photovoltaic modules with its unique chemical structure and mechanism of action. Whether it is traditional EVA packaging glue or emerging POE and silicone packaging glue, zinc neodecanoate provides a reliable protective barrier. In the future, with the continuous advancement of science and technology, I believe that zinc neodecanoate will play a more important role in the photovoltaic industry.Help mankind move towards a cleaner and sustainable energy future.

References:

Fraunhofer ISE. (2020). Study on the UV Stability of EVA Encapsulation Materials.
DuPont. (2019). Performance Evaluation of POE Encapsulation with Zinc Neodecanoate Additives.
Eindhoven University of Technology. (2021). Development of Advanced Composite Stabilizers for Photovoltaic Applications.
National Renewable Energy Laboratory (NREL). (2022). Research Progress on Bifacial Solar Modules.
Tsinghua University. (2021). Nanoscale Modification of Zinc Neodecanoate for Enhanced UV Resistance.

Photovoltaic module packaging glue zinc neodecanoate CAS 27253-29-8 UV yellowing resistance suppression technology

Photovoltaic module packaging glue zinc neodecanoate: a pioneer in UV yellowing resistance technology

1. Basic characteristics and mechanism of zinc neodecanoate

(I) Chemical structure and physical parameters of zinc neodecanoate

(B) Mechanism of action of zinc neodecanoate