Poly(lactic acid) 기반 생분해성 복합소재의 연구동향

1 138 Polymer Science and Technology Vol. 32, No. 2, April 2021 2014 ( )2016 ( )2021 ( )2021- (Post-Doc.) 2004 ( )2010 ( )2010-2012 University of Massachusetts, Amherst (Post-Doc.)2012-2015 2015- Poly(lactic acid ) Research Trends of Biodegradable Composite Materials Based on Poly(lactic acid ) | Do Young Kim Dong Yun Lee Department of Polymer Science and Engineering, Kyungpook National University, 80 Daehak-ro, Buk-Gu, Daegu 41566, Korea E-mail: , Zero . (EU Horizon 2020) . , COVID-19 1.

2 1 , COVID-19 , . , , , , . , , , (biomass) . , , , .2-5 ISO 17088 EN 13432, ASTM D6400 , ISO 14855-1 , 180 90% .6 ester amide, ether , .7 poly (caprolactone)(PCL), poly (butylene adipate-co-terephthalate)(PBAT), poly (butylene succinate)(PBS) , Poly(lactic acid )(PLA), polyhydroxyalkanoates (PHA), thermoplastic starch(TPS) .. 32 2 2021 4 139 MaterialTg( C)Tm( C)Tensile strength(MPa)Elongation at break(%)Low-density polyethylene-10098 1158 20100 1,000 Polypropylene-1817531 41100 600 poly (ethylene terephthalate) 6926548 7230 300 Poly(lactic acid ) 45 60150 16221 (butylene adipate-co-terephthalate) -34115 12521670 poly (caprolactone) -60 to -6558 6521 42300 1,000 1.

3 , 1. PLA . 2. PLA .. , PLA PHA, PCL, PBAT (modulus), . , (brittleness), .8-10 PLA , PLA .2. PLA PLA aliphatic polyester ester hydroxyl carboxyl group , ( 1).11-13 , PLA (life-cycle assessment) (cradle-to-factory gate) kg CO2-eq/kg ( 2).14 (melting temperature, Tm) , PLA lactide .15,16 PLA (glass transition temperature, Tg) 60 C, Tm 180 C.

4 PLA semi-rigid (chain mobility) .11,12 , , PLA .8,9 , PLA 15 250 ppm , PLA 100 ppm .17,18 PLA PLA .PLA 1 , PLA , .8,19-26 , , , , . PLA PLA (free volume) | Poly(lactic acid ) 140 Polymer Science and Technology Vol. 32, No. 2, April 2021 3. PLA CNF .39 4. PLA matrix .40 5. PLA isocyanate : (a) urethane, (b) amide, (c) allophanate.

5 , Tg , . PLA (ductility) PLA . PLA acetyl tributyl citrate(ATBC),31-33 diethyl adipate,34,35 lactides,8,36 and polyethylene glycol(PEG)37,38 PLA , . , PLA .39-42 PLA (blown film) ,43 cellulose nanofiber(CNF) triethyl citrate PLA matrix CNF , ( 3).39 , PLA CNF ATBC , , ,40 PEG 3D PLA ( 4).41, (Reactive Modifier) PLA PLA.

6 8-10,44 , backbiting reaction, -scission .45,46 PLA . PLA hydroxyl carboxyl group PLA stars, combs, H-shaped ( 5, 6). , PLA .47-50 , PLA (entanglement) , , strain hardening , Tg, Tm . , , , (tissue engineering), 3D .9,51-53 PLA isocyanate methylene diphenyl diisocyanate,54-56 hexamethylene diisocyanate57-60 , epoxy multifunctional epoxy-based styrene-acrylic oligomer,27,28, 45,61,62 anhydride pyromellitic dianhydride59,63-66.

7 Peroxide lauroyl peroxide,67,68 dicumyl peroxide64,66 , 32 2 2021 4 141 6. PLA epoxy . 7. twin extruder . maleic anhydride (MAH),50,69,70 glycidyl methacrylate71,72 . PLA PLA , , .. (screw) , die .73,74 (side feeder), (liquid feeder) , ( 7). PBAT PBAT , . (stiffness) PLA . PLA PBAT sea-island , PLA/PBAT.

8 , PLA PBAT PLA PBAT (transesterification), bi- tri-block , .79-81 , PLA PBAT PLA PLA-PEG-PLA tri-block ( 8), acrylate ( 9) PLA PBAT , PLA/PBAT co-continuous 7-8 , Izod .79-81 PBS PBS succinic acid 1,4- butanediol polyester , , . , , , , .82,83 PBS PLA , .84-86 PBAT PBS , PLA | Poly(lactic acid ) 142 Polymer Science and Technology Vol. 32, No. 2, April 2021 10. PLA/PBS/ .88 11. poly (butylene succinate-co- lactic acid ) PLA/PBS.

9 89 8. PLA-PEG-PLA tri-block PLA/PBAT .80 9. poly (butyl acrylate) PLA/PBAT .81 , ( 10), ( 11) . (Starch) , , , , linear amylose branched amylopectin , . hydroxyl group , (thermal decomposition temperature, Td) Tm . , .92-94 PLA PLA (gelatinization) TPS PLA . , PLA PLA/ .50,95-98 PLA/TPS TPS , , Tg, Tm . TPS , , , pH.

10 99 PLA TPS . , PLA MAH TPS , PLA-g-starch , 32 2 2021 4 143 12. Coir fibres TPS/PLA .105 13. PHA .111 PLA/TPS .45,100-104 , TPS/PLA ( 12)105-107 expanded polystyrene(EPS) /PLA/ ,108 3D PLA/TPS . PHA PHA polyester (side chain) hydroxyalkanoic acids , , .110 PHA poly (3- hydroxybutyrate)(P3HB), poly (3-hydroxyvalerate)(P3HV), poly (3-hydroxybutyrate-co-3-hydroxyvaler ate)(PHBV), poly (3-hydroxybutyrate-co-3-hydroxyhexan oate)(PHBH) , PBS ( 13).