PBS composite material and method for producing same
A polybutylene succinate (PBS) nanocomposite material includes a matrix comprising polybutylene succinate chains, and nanocelluloses dispersed between the polybutylene succinate chains. The PBS composite material may be produced by polymerizing 1,4-butanediol and succinic acid or a derivative thereof in a mixture of 1,4-butanediol and succinic acid or a derivative thereof with nanocelluloses. The PBS nanocomposite material and the method have improved properties, which does not require a surface hydrophobization pretreatment process of cellulose, melt kneading, and solution mixing processes.
1. A polybutylene succinate (PBS) composite material comprising:
a matrix comprising polybutylene succinate chains; and
nanocelluloses dispersed between the polybutylene succinate chains,
wherein the PBS composite material is produced by in-situ polymerizing 1,4-butanediol or a derivative thereof and succinic acid or a derivative thereof in a mixture of 1,4-butanediol or a derivative thereof, succinic acid or a derivative thereof with nanocelluloses;
the nanocellulose is included in an amount of 0.05 to 15% by weight based on a total weight of the PBS composite material;
the nanocellulose includes monovalent cations in an amount of 3,000 ppm or less; and
the glass transition temperature of the PBS composite material is −25° C. to −21° C.
2. The PBS composite material according to claim 1 , wherein the matrix further comprises a polymer chain including a repeating unit represented by Formula 3
wherein R 1 is each independently in each repeating unit an alkylene group having 1 to 100 carbon atoms, a cycloalkylene group having 4 to 8 carbon atoms, or an arylene group having 6 to 18 carbon atoms, and
the alkylene group may be disconnected by O, a cycloalkylene group having 4 to 8 carbon atoms or an arylene group having 6 to 18 carbon atoms.
3. The PBS composite material according to claim 1 , wherein the nanocellulose includes cellulose nanocrystal, cellulose nanofiber, or a mixture thereof.
4. The PBS composite material according to claim 1 , wherein the nanocellulose includes a cellulose having a diameter of 2 nm to 200 nm.
5. The PBS composite material according to claim 1 , wherein the nanocellulose has a pH of 6 to 8.
6. A method for producing a polybutylene succinate (PBS) composite material, comprising:
in-situ polymerizing 1,4-butanediol and succinic acid or a derivative thereof in a mixture of 1,4-butanediol and succinic acid or a derivative thereof with nanocelluloses,
wherein the nanocellulose is included in an amount of 0.05 to 15% by weight based on a total weight of the mixture;
the nanocellulose includes monovalent cations in an amount of 3,000 ppm or less; and
the glass transition temperature of the PBS composite material is −25° C. to −21° C.
7. The method for producing a PBS composite material according to claim 6 , wherein the nanocellulose has a pH of 6 to 8.
8. The method for producing a PBS composite material according to claim 6 , wherein an additional diol compound is polymerized together during the polymerization.
9. A product produced by the method of claim 6 .