sự phát triển của vật liệu phân hủy sinh học nanocomposite

Vật Liệu Cao Cấp: từ Composite đến Nanocomposite ... Composite là hỗn hợp của ít nhất hai vật liệu khác nhau bổ sung cho nhau. .... Vì là loại sợi thuộc họ amid, Kevlar dễ bị phân hủy khi với gặp nước hoặc thoái hóa khi
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sự phát triển của vật liệu phân hủy sinh học nanocompositeJ. Ind. Eng. Chem., Vol. 13, No. 4, (2007) 485-500REVIEW Progress in Nanocomposite of Biodegradable Polymer Ke-Ke Yang, Xiu-Li Wang, and Yu-Zhong Wang*† Center for Degradable and Flame-Retardant Polymeric Materials, College of Chemistry, Sichuan University, Chengdu 610064, People’s Republic of China Received May 10, 2007; Accepted May 18, 2007 Abstract: This paper reviews recent developments related to biodegradable polymer nanocomposites. The prepa- ration, characterization, properties, and applications of nanocomposites based on biodegradable polymers are in- troduced systemically. The related biodegradable polymers include aliphatic polyesters such as polylactide (PLA), poly(ε -caprolactone) (PCL), poly(p-dioxanone) (PPDO), poly(butylenes succinate) (PBS), poly (hydroxyalkanoate)s such as poly(β -hydroxybutyrate) (PHB), poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV), and natural renewable polymers such as starch, cellulose, chitin, chitosan, lignin, and proteins. The nanoparticles that have been also utilized to fabricate the nanocomposites include inorganic, organic, and metal particles such as clays, nanotubes, magnetites, Au and Ag, hydroxyapatite, cellulose, chitin whiskers and lignin. Keywords: biodegradable material, nanocomposite, aliphatic polyester, poly(hydroxyalkanoate), natural re- newable polymer Introduction thetic polymers, particularly aliphatic polyester, such as poly(L-lactide) (PLA) [6-11], poly(ε-caprolactone)1) (PCL) [12-14], poly(p-dioxanone) (PPDO) [15-21], poly In the past century, various synthetic polymer materials (butylenes succinate) (PBS) [22-24], and poly(ethylenehave been developed in different forms, such as plastics, succinate) (PES) [25,26]; (2) polyesters produced by mi-fibers, and synthetic rubbers, and used widely in a varie- croorganisms, which basically indicates different typesty of fields, including packaging, construction materials, of poly(hydroxyalkanoate)s, including poly(β-hydrox-agriculture, and medical devices. Undoubtedly, those ybutyrate) (PHB) and poly(3-hydroxybutyrate-co-3-hy-synthetic polymer materials perform very important roles droxyvalerate) (PHBV) [27-30]; (3) polymers originat-in our daily lives. After rapid development for several ing from natural resources, including starch, cellulose,decades, a Gordian knot is becoming increasingly seri- chitin, chitosan, lignin, and proteins [31-46]. Althoughous: the continual environmental pollution caused by un- biodegradable polymers have developed an amazingdegradable synthetic polymer wastes. speed and the flourishing situation in this field is quite Recycling present polymer wastes is a direct and popu- inspiring, they are far from becoming substitutes for tra-lar approach toward solving this problem. However, de- ditional undegradable polymers. The major reason is theveloping and using biodegradable polymers is consid- disadvantageous properties of these materials, such asered as the most thorough method for resolving this poor mechanical properties, high hydrophilicity, andsituation. With this background, the development of bio- poor processibilty, which limit their application. Takingdegradable polymers has been a growing concern since this situation into consideration, we can easily under-the last decade of the 20th century. A variety of bio- ...