On June 23, 2025, with the surge in global demand for clean energy, the photovoltaic industry has increasingly stringent performance requirements for packaging materials. Recently, Hubei Huifu Nanomaterials Co., Ltd. released its latest research results. Its independently developed hydrophobic gas-phase silica HB-139 has achieved a key technological breakthrough in the field of photovoltaic adhesives, significantly improving the long-term reliability and power generation efficiency of photovoltaic modules.
As the core packaging material for solar panels, photovoltaic adhesive needs to have excellent weather resistance, adhesive strength, and rheological properties. Although traditional inorganic fillers can regulate colloid consistency, they have problems such as poor dispersibility and easy settling. HB-139 forms a three-dimensional network structure in the photovoltaic adhesive through the characteristics of nano particle size and high specific surface area, which effectively enhances the mechanical strength and anti-aging ability of the colloid. Experimental data shows that after 1000 hours of double 85 testing in an environment with 85 ℃ and 85% humidity, the adhesive strength attenuation rate of HB-139 added photovoltaic adhesive is reduced by 30% compared to traditional materials, and the fluidity of the adhesive remains stable, significantly improving the packaging yield and outdoor service life of photovoltaic modules.
This breakthrough is due to the upgrade of the domestic gas-phase silica preparation process. At present, domestic enterprises have achieved the recycling of by-products such as silicon tetrachloride and methyl trichlorosilane, and the purity of gas-phase silica produced through high-temperature hydrolysis technology of chlorosilane is over 99.8%. In addition, Shandong Hongruitong New Material Technology Co., Ltd. recently applied for a patent for the preparation of hydrophobic gas-phase silica, which optimizes the surface hydroxyl substitution degree through modifiers such as silicone oil and silane coupling agent, further improving the compatibility of the material with photovoltaic adhesive substrates such as epoxy resin.
Industry experts point out that the rise of domestic gas-phase silica is breaking the long-term monopoly of international brands. With the development of the photovoltaic industry towards high efficiency and long lifespan, the addition of gas-phase silica in photovoltaic adhesives is expected to increase from the current 5% -8% to 10% -15%, becoming a key material to promote cost reduction and efficiency improvement in the industry.