Graphene modifies the biodegradation of poly(lactic acid)-thermoplastic cassava starch reactive blend films

被引：31

作者：

Bher, Anibal ^{[1
,2
,3
]}

Unalan, Ilke Uysal ^{[1
]}

Auras, Rafael ^{[1
]}

Rubino, Maria ^{[1
]}

Schvezov, Carlos E. ^{[3
]}

机构：

[1] Michigan State Univ, Sch Packaging, E Lansing, MI 48824 USA

[2] UNSAM CNEA, Inst Sabato, RA-1650 San Martin, Buenos Aires, Argentina

[3] CONICET UNaM, Inst Mat Misiones, RA-3300 Posadas, Misiones, Argentina

来源：

POLYMER DEGRADATION AND STABILITY | 2019年 / 164卷

关键词：

PLA; Composting; Biobased; Nanoparticles; Hydrolytic degradation; BACTERIAL COMMUNITIES; THERMOPHILIC PHASE; CARBON NANOTUBES; DEGRADATION; ACID); SOIL; PLASTICS; BIOCOMPATIBILITY; NANOCOMPOSITES; NANOPLATELETS;

D O I：

10.1016/j.polymdegradstab.2019.04.014

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 [高分子化学与物理];

摘要：

Biobased blend films produced from poly(lactic acid) (PLA), thermoplastic cassava starch (TPCS), and reinforced with graphene nanoplatelets (GRH) were evaluated in compost and inoculated vermiculite under composting conditions for 120 days. A reduction of the molecular number of the PLA fraction in the blends indicated early hydrolytic degradation. A priming effect was observed in compost for the physical blend of PLA with TPCS. A high biodegradation rate was observed for the TPCS fraction in each tested sample. In inoculated vermiculite, the addition of GRH resulted in a decreased hydrolytic degradation rate for PLA-GRH, attributed to the natural barrier offered by GRH to diffusion of water into the PLA matrix. In compost, incorporation of GRH at 0.1% wt. also resulted in a decreased abiotic degradation rate for PLA. Films containing GRH were associated with a longer lag-phase. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页码：187 / 197

页数：11

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