Poly(2-methacryloyloxyethyl phosphorylcholine)
Synonyms: PMPC
CAS No: 67881-99-6
Linear Formula:: (C11H22NO6P)n
Molecular weight: 5000-400,000 Da
Appearance: White to beige particle
Minimal order quantity: 30 gram
Poly(2-methacryloyloxyethyl phosphorylcholine) (PMPC) is a biocompatible polymer with exceptional hydrophilic properties that mimics the structure of cell membranes. This unique biomaterial features phosphorylcholine groups that create a water layer on its surface, effectively preventing protein adsorption and cell adhesion. PMPC is highly valued in medical and biotechnology fields for its outstanding biocompatibility, making it ideal for applications where materials come into direct contact with biological tissues or fluids. The polymer maintains excellent stability in various environments while remaining non-toxic and non-immunogenic.
PMPC finds widespread use in medical devices, contact lenses, drug delivery systems, and biosensors due to its resistance to biofouling. When coated on surfaces, it significantly reduces bacterial adhesion and protein buildup, extending the lifespan and performance of implantable devices. In tissue engineering, PMPC serves as an excellent scaffold material that supports cell growth while minimizing unwanted immune responses.
FAQ
Most frequent questions and answers
Unlike many synthetic polymers, PMPC mimics biological structures, specifically the outer surface of cell membranes. This unique feature allows it to resist protein adsorption and cell adhesion, making it “biologically invisible” to the body’s defense mechanisms.
PMPC’s biocompatibility stems from its phosphorylcholine groups that attract a layer of water molecules, creating a hydration barrier that prevents protein adsorption and subsequent biological reactions. This hydration layer mimics the natural phospholipid bilayer of cell membranes.
PMPC is not readily biodegradable. It maintains good chemical stability in biological environments, which is advantageous for long-term applications but means it doesn’t naturally break down in the body.
PMPC is commonly used as a coating for implantable devices to reduce foreign body responses and prevent biofouling. It’s applied to cardiovascular stents, catheters, artificial joints, and other devices that interface with blood or tissues.
Yes, PMPC can form polymeric micelles and liposomes that encapsulate drugs. Its biocompatible nature allows for prolonged circulation in the bloodstream, improving drug delivery efficiency. It’s particularly valuable for delivering hydrophobic drugs.
PMPC coatings on contact lenses improve moisture retention, reduce protein deposits, decrease bacterial adhesion, and enhance comfort by mimicking the eye’s natural tear film components. This results in reduced eye irritation and extended wear time.
Characterization methods include NMR spectroscopy (for structure confirmation), GPC/SEC (for molecular weight determination), FTIR spectroscopy, contact angle measurements (for surface properties), AFM (for surface morphology), and various biological assays to assess biocompatibility.
Yes, PMPC is highly water-soluble due to its hydrophilic phosphorylcholine groups. This property facilitates its processing in aqueous environments and contributes to its excellent biocompatibility.
PMPC should be stored in a cool, dry place, preferably at 2-8°C. It should be protected from direct sunlight, moisture, and oxidizing agents. For long-term storage, freezing at -20°C is recommended with proper sealing to prevent moisture absorption.
PMPC dissolves well in water and polar solvents such as methanol, ethanol, and various alcohol/water mixtures. It has limited solubility in non-polar organic solvents like chloroform and toluene.
Yes, PMPC can be processed into films and coatings using techniques such as dip-coating, spin-coating, spray coating, electrospinning, or layer-by-layer deposition. These methods allow for controlled thickness and surface properties.
PMPC can typically withstand gamma irradiation, ethylene oxide treatment, and electron beam sterilization. Autoclaving may be possible but should be tested for specific formulations as high temperatures can affect some PMPC-based materials.