General Information
- Product Name: Polyquaternium-11
- CAS: 53633-54-8
- Synonyms: Poly[(2-ethyldimethylammonioethyl methacrylate ethyl sulfate)-co-(1-vinylpyrrolidone)]
- Molecular Formula: (C8H15NO2)x·(C6H9NO)y·(C4H10O4S)z
- Appearance: Colorless to light yellow viscous liquid
Description
Polyquaternium-11 is a cationic copolymer synthesized from vinyl pyrrolidone and dimethylaminoethyl methacrylate. This versatile ingredient is renowned for its ability to form transparent, flexible films on hair, making it a popular choice in various hair care products.
Performance Characteristics
- Cationic Nature: As a cationic polymer, Polyquaternium-11 exhibits strong affinity for hair and skin, providing effective conditioning and hold.
- Film Formation: It forms a continuous, non-tacky film that contributes to the hair's smoothness and shine while preventing buildup.
- Compatibility: This copolymer is compatible with a variety of surfactants, including anionic, non-ionic, and amphoteric types, allowing for diverse formulation options.
- Non-Irritating: Polyquaternium-11 is non-irritating to the eyes and skin, making it suitable for sensitive formulations.
Technology Parameters
| Items | QAC-P037 |
| SolidContent (%) | 20±1 |
| pH (1% aqueous solution) | 5.0-7.0 |
| Viscosity (25℃, cps) | 20000-70000 |
| Residual N-Vinylpyrrolidone (%) | ≤1.0 |
Applications
Polyquaternium-11 is widely utilized in the following products:
- Mousses: It provides structure and hold without stiffness.
- Hair Gels: It delivers a firm yet flexible hold.
- Conditioning Shampoos: It enhances hair softness and manageability.
- Hair Conditioners: It improves combability and shine.
- Hair Dyes: It stabilizes formulations and enhances application.
- Perming Agents: It contributes to the effectiveness of chemical treatments.
Packaging and Storage
- Packaging: Available in 200 kg plastic drums.
- Storage Conditions: It should be stored in a cool, dark environment, away from heat and sunlight to maintain stability and performance.
- Shelf Life: The product has a shelf life of one year.
Polyquaternium-11 from Alfa Chemistry is an essential ingredient for creating high-quality hair care products, combining performance, safety, and adaptability in one powerful formulation. To place an order or request a quote, please don't hesitate to contact us.
Case Study
Polyquaternium-11 for the Preparation of High-Performance Biocompatible Anodes in Microbial Fuel Cells
Chen, Xuepeng, et al. Journal of Power Sources 480 (2020): 228789.
Polyquaternium-11 (PQ-11) was employed as a functional polymeric modifier to enhance anode performance in microbial fuel cells (MFCs) by improving microbial adhesion and biofilm formation. The fabrication of the CC-CD-PQ-11 anode involved a sequential coating process on a carbon cloth (CC) substrate. Initially, 2 cm × 2 cm carbon cloth electrodes were purified by soaking in acetone and ethanol for 3 h each, followed by ultrasonic rinsing in deionized water for 15 min and drying at 60 °C.
For surface modification, β-cyclodextrin (β-CD) was dispersed in deionized water and stirred for 1 h. Purified CC electrodes were soaked in the β-CD solution for 3 h and oven-dried to produce CC-CD electrodes. PQ-11 was separately dissolved in water, stirred for 1 h, and combined with β-CD to form a co-modified solution. CC electrodes were then immersed in this β-CD/PQ-11 mixture for 3 h, followed by drying at 60 °C, yielding the final CC-CD-PQ-11 anodes.
Electrochemical evaluation revealed that the CC-CD-PQ-11 anode achieved a maximum power density of 1754.1 ± 54.0 mW m⁻², representing a 5.2-fold and 1.4-fold improvement over unmodified CC and CC-CD electrodes, respectively. Capacitance measurements demonstrated enhanced electrochemical behavior, with a net charge of 6.537 ± 0.354 C m⁻² during 5 min interruption. The synergistic effects of PQ-11 and β-CD enhanced surface roughness, wettability, total biomass, and formation of highly electroactive biofilms, underpinning superior MFC performance.
This study demonstrates that polyquaternium-11 is an effective polymeric modifier for the preparation of biocompatible, high-activity anodes, offering a facile and scalable strategy for advanced microbial energy conversion technologies.