Copper foil, as a fundamental conductive raw material for producing printed circuit boards (PCBs) and lithium-ion batteries, serves as the carrier for assembling various electronic components. Since the untreated raw foil produced by electrodeposition consists of exposed copper crystal grains, its anti-peeling strength with resin laminates under high-temperature pressing is low, leading to easy detachment and scrap. Additionally, its poor high-temperature oxidation resistance may result in copper diffusion, posing risks of short circuits in later PCB production. Direct etching of raw foil also carries high risks of side etching and circuit breakage. Therefore, electrolytic copper foil requires a series of post-treatment processes in practical PCB applications, including pretreatment, roughening, stabilization, alloying, passivation, and silanization, to meet the requirements of emerging electronic components. ‌Roughening‌ increases active sites on the copper foil surface. Typically, electrodeposition is performed at limiting current density in a high-acid, low-copper electrolyte to form uniformly distributed fine copper nodules, replacing smooth contour peaks and enhancing adhesion to resin boards. ‌Stabilization‌, slightly different from roughening, aims to encapsulate and reinforce the dendritic roughened nodules to prevent detachment. This involves coating a layer of copper over the loose roughened particles to improve anti-peeling strength with resin boards. ‌Alloying‌ typically involves plating one or more layers of dissimilar metals after roughening and stabilization. The alloy layer enhances the heat resistance and anti-peeling strength of copper-clad laminates, preventing copper diffusion into resin substrates during lamination and side leakage during etching. ‌Passivation‌ forms a protective film on the copper foil surface. Traditional passivation uses chromate due to chromium’s exceptional hardness. During passivation, chromium metal forms a dense basic chromate oxide film, improving abrasion resistance, oxidation resistance, and storage stability. ‌Silanization‌ involves hydrolyzed silanol groups from silane coupling agents reacting with hydroxyl groups on the copper oxide surface to form Si—O—Me bonds, significantly enhancing adhesion between resin boards and copper foil while providing additional protection. In practice, most copper foil manufacturers only include passivation in post-treatment processes. Traditional chromic acid-glucose immersion passivation uses toxic hexavalent chromium, which is carcinogenic and harmful to ecosystems and human health. With tightening environmental regulations, developing chromium-free green passivation technologies for lithium battery copper foil has become imperative. Environmentally friendly passivators fall into two categories: organic and inorganic. ‌Organic passivators‌ include organic acids (phytic acid, citric acid, phosphonic acid), heterocyclic compounds (azoles, imidazoles, thiazoles), and silane coupling agents (amino silanes, epoxy silanes), forming protective films to prevent oxidation. ‌Inorganic passivators‌ include molybdate, tungstate, silicate, and rare earth salts, forming metal oxide films for oxidation resistance. Combining multiple corrosion inhibitors further enhances protective performance. ‌Jiujiang Defu Technology Co., Ltd.‌ disclosed a patent (A Chromium-Free Passivation Method for Lithium Battery Copper Foil), using methyl benzotriazole as the main film-forming agent to create a protective coordination bond film on copper foil. ‌Fogang Kingboard Industrial Co., Ltd.‌ patented (Copper Foil Anti-Oxidation Treatment Liquid, Preparation Method, and Equipment), containing hydroxybenzotriazole (HBTA), 2-mercaptobenzotriazole (MBT), sodium molybdate, and phosphoric acid. Post-treatment copper foil exhibits no discoloration at 150°C for 30 minutes, with uniform appearance and no defects. ‌Anhui Tongguan Copper Foil Co., Ltd.‌ published a study (Silanization Treatment of Copper Foil and Its Corrosion Resistance), using γ-APT (γ-aminopropyl triethoxysilane) to form self-assembled films under acidic conditions, optimizing corrosion resistance after curing at 100°C for 1 hour. ‌Frank Technology (Shenzhen) Co., Ltd.‌ patented (A Benzotriazole-Containing Nano-Silicon Corrosion Inhibitor and Preparation Method), synthesizing a benzotriazole-silane nano-inhibitor with enhanced copper protection and structural stability. ‌Hubei Jianghan New Materials Co., Ltd.‌ patented (3-(N-Imidazolyl)Propyltriethoxysilane and Synthesis Method), used for metal surface treatment, resin adhesion improvement, and corrosion inhibition. ‌Gewuzhi New Materials Co., Ltd.‌ specializes in R&D and production of copper foil chemicals, providing high-performance surface treatment solutions for electronics and lithium batteries. Through proprietary NEOS, PCU, and 110 series products, the company enhances copper foil stability, tensile strength, and oxidation resistance while advancing chromium-free processes for green manufacturing. With technical expertise and customized services, Gewuzhi has become a key domestic supplier, supporting localization of high-end materials in 5G communication and new energy battery industries.

‌CHPS-Na (Sodium 3-Chloro-2-Hydroxypropylsulfonate)‌ is a vital organic chemical intermediate containing both hydroxyl and sulfonic acid groups. Its molecular structure combines hydrophilic sulfonic acid groups with highly reactive halogen atoms, enabling the introduction of hydrophilic hydroxy-sulfonic acid groups into synthetic materials. It is widely used in ‌surfactant preparation‌, ‌starch modification‌, and ‌oilfield drilling material production‌. ‌I. Surfactant Applications‌ ‌1. Synthesis of Amphoteric Sulfobetaine Surfactants‌ Prepared via ‌quaternization reaction‌ with long-chain alkyl tertiary amines (e.g., dodecyl dimethylamine) to yield amphoteric surfactants with ‌cationic-anionic dual functionality‌. Demonstrates ‌outstanding thermal resistance (>100°C)‌ and ‌salt tolerance (stable in high Ca²⁺/Mg²⁺ environments)‌, suitable for ‌high-temperature oilfield flooding agents‌ and ‌industrial detergents‌. ‌High activity‌ with ‌ultra-low critical micelle concentration (0.1-1 mmol/L)‌, effectively reducing oil-water interfacial tension and enhancing crude oil recovery. ‌2. Preparation of Sulfonated Hydroxypropyl Guar Gum‌ Generated through ‌etherification reaction‌ with guar gum under weakly acidic conditions, serving as a ‌viscosifier for well-killing fluids‌. Key properties include: ‌Acid/alkali resistance (stable at pH 2-12)‌ ‌Salt tolerance (withstands 10% NaCl solutions)‌ ‌High transparency (>90% light transmittance)‌, ideal for ‌high-temperature, high-pressure drilling environments‌. Compared to carboxymethyl guar gum, the sulfonated product exhibits ‌higher purity (>95%)‌, resolving material discharge challenges in dry-process manufacturing. ‌II. Oilfield Applications‌ ‌1. Development of Fluid Loss Reducers for Drilling Fluids‌ Forms ‌2-hydroxy-3-sulfonatopropyl starch ether‌ via alkaline etherification with starch, acting as a drilling fluid additive: ‌Significantly reduces fluid loss (API filtration 100 mPa·s)‌ and ‌30% enhanced proppant suspension capacity‌, minimizing formation damage. ‌III. Starch Modification‌ ‌1. Functional Starch Derivatives‌ ‌Food Industry‌: Serves as a ‌thickener and stabilizer‌, improving texture in dairy products and sauces, with ‌high-temperature sterilization resistance (121°C/30 min)‌. ‌Paper Industry‌: Functions as a ‌wet-strength agent‌, boosting dry/wet strength (‌wet strength retention >30%‌) and reducing lignin dissolution. ‌Environmental Materials‌: Modified starch acts as a ‌heavy metal adsorbent‌, achieving ‌Pb²⁺ adsorption capacity of 200 mg/g‌. ‌IV. Biomedical & Consumer Chemicals‌ ‌1. Pharmaceutical Intermediate‌ Used in synthesizing ‌psychotropic drugs (e.g., antidepressants)‌ via ‌nucleophilic substitution reactions‌ to enhance drug water solubility. ‌2. Cosmetic Additives‌ Acts as an ‌emulsion stabilizer and humectant‌, improving ‌low-temperature stability (no precipitation at -20°C)‌ and reducing formulation irritation (‌pH 5.5-7.0‌). ‌V. Other Industrial Uses‌ ‌1. Metallurgy‌ Forms ‌metal complexes (Cu, Al, etc.)‌ as a surface treatment agent, enhancing ‌electroplating uniformity (roughness 90% capacity retention after 500 cycles)‌. ‌Product Offerings‌ ‌Gewu Chemical‌ provides two CHPS-Na forms: ‌Anhydrous CHPS-Na‌: Higher purity, ideal for ‌precision chemical synthesis and high-end pharmaceutical intermediates‌. ‌Hemihydrate CHPS-Na‌: Contains fixed crystal water, eliminating drying steps to ‌simplify processes‌ (e.g., direct use in dye intermediate synthesis). Through this dual-product strategy, we deliver ‌tailored, cost-effective, and eco-friendly solutions‌, driving ‌green industrialization‌ and ‌high-value industry upgrades‌.

1,3-Propane sultone is an organic compound with the chemical formula C3H6O3S, commonly used in organic synthesis and the pharmaceutical industry. Currently, this product is mainly applied in the following areas: new energy sector, chemical and materials industry, medicine and biochemistry, photosensitive materials and fine chemicals, environmental protection, and other industrial applications. I. New Energy Sector – Key Material for Lithium Battery Performance Enhancement ‌Electrolyte Additive‌: As a core additive for lithium-ion battery electrolytes, 1,3-propane sultone can suppress side reactions on electrode surfaces (e.g., metal ion dissolution), significantly improving the battery's initial capacity and cycle life. Particularly in high-temperature environments, it reduces gas generation, enhancing safety. By optimizing the stability of the electrode/electrolyte interface, it extends battery lifespan and improves high/low-temperature storage performance, making it suitable for power batteries, energy storage batteries, and other fields. With the rapid development of the new energy vehicle and energy storage industries, its demand in lithium batteries continues to grow, making it a crucial upstream raw material in the new energy supply chain. II. Chemical and Materials Industry – Versatile Sulfonating Agent and Intermediate ‌Universal Sulfonating Agent‌: Under mild conditions, it introduces sulfonic acid groups to compounds, imparting properties such as hydrophilicity and antistatic characteristics. It is widely used in synthesizing intermediates for electroplating additives (e.g., PPS, UPS, DPS, MPS). It can also serve as a raw material for surfactants, applied in zwitterionic surfactants, cosmetic emulsifiers, and industrial lubricants. ‌Electroplating and Surface Treatment‌: As a key raw material for electroplating brighteners and buffering agents, it improves coating uniformity and corrosion resistance, making it suitable for precision electroplating processes in electronic components, automotive parts, and other applications. III. Medicine and Biochemistry – Core Intermediate for Drug Synthesis ‌Pharmaceutical Intermediate‌: It participates in the synthesis of antibacterial and antiviral drugs, with its stable chemical properties and high reactivity providing a foundation for drug molecule structural modifications. In biochemistry, it is used for protein modification and enzyme immobilization research. ‌Biological Buffer‌: Through sulfopropylation reactions, sulfonic acid groups can be precisely introduced into traditional buffer molecular frameworks, endowing them with stronger ion regulation capabilities and chemical stability. These modified buffers exhibit excellent buffering efficiency across a wide pH range (5.0–8.5), particularly suitable for biochemical reaction systems under high salt concentrations or extreme temperature conditions. IV. Photosensitive Materials and Fine Chemicals ‌Photosensitive Dyes and Inks‌: As a precursor for sensitizing dyes, it enhances the photosensitivity and development efficiency of photosensitive materials, applied in printing inks, films, and photoresist fields. In the leather industry, it is used for synthesizing tanning agents, improving leather softness and dyeing uniformity. V. Environmental Protection and Other Industrial Applications ‌Environmental Protection‌: Used in wastewater treatment processes to remove heavy metal ions or organic pollutants through sulfonation reactions. ‌Petrochemical Industry‌: Serves as a raw material for synthesizing fluorinated organic chemicals, applied in fluorination reactions and specialty material production. VI. Emerging Fields Exploration In emerging fields such as flexible electronics and wearable devices, its antistatic properties are utilized for functional coating development. With its sulfonation capability, interface modification characteristics, and chemical stability, 1,3-propane sultone has deeply penetrated over ten fields, including lithium batteries, medicine, electroplating, and environmental protection, becoming an indispensable multifunctional raw material in the fine chemical industry. As technology advances, its application potential in the new energy and high-end materials sectors will further expand.