Phosphorus loaded particles and methods for their preparation and use

A polymer composition comprising:

• at least one polymer configured as a film;
• and
• a flame retardant composition dispersed in the polymer, the flame retardant composition including:
• a noncombustible particulate that includes nanoscale pores;
• and
• red phosphorus adsorbed into the nanoscale pores of the noncombustible particulate, wherein the flame retardant composition is characterized by a total red phosphorus content substantially comprising the adsorbed red phosphorus.

A method of making a flame retardant composition, the method comprising:

• providing a noncombustible particulate that includes nanoscale pores;
• providing a fluid that includes phosphorus;
• contacting the fluid and the noncombustible particulate;
• adsorbing the phosphorus from the fluid into the nanoscale pores of the noncombustible particulate to produce the flame retardant composition comprising solid red phosphorus adsorbed by the noncombustible particulate;
• and
• separating unadsorbed phosphorus from the flame retardant composition after adsorbing the phosphorus into the nanoscale pores of the noncombustible particulate.

A method of making a polymer composition, the method comprising:

• providing a polymer configured as a film;
• providing a flame retardant that includes:
• a noncombustible particulate that includes nanoscale pores;
• and
• red phosphorus adsorbed into the nanoscale pores of the noncombustible particulate, wherein unadsorbed phosphorus is separated from the flame retardant composition after the phosphorus adsorbed into the nanoscale pores of the noncombustible particulate;
• and
• contacting the polymer and the flame retardant to form the polymer composition.