Preparation of POSS Modified PLLA Film and Research of Its Part Properties
Star-shaped POSS-g-PLLA is prepared by using l -lactic acid (L-LA) and octa (γ-chloroammoniumpropyl) octasilsesquioxane (POSS-NH3Cl). Then, a series of modified PLLA films are prepared by using POSS-g-PLLA, and their part properties are investigated. The
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Preparation of POSS Modified PLLA Film and Research of Its Part Properties Xiaohui Zhang and Yanfen Zhang
Abstract Star-shaped POSS-g-PLLA is prepared by using L-lactic acid (L-LA) and octa (γ-chloroammoniumpropyl) octasilsesquioxane (POSS-NH3Cl). Then, a series of modified PLLA films are prepared by using POSS-g-PLLA, and their part properties are investigated. The conclusions are as follows: (1) Water absorption of modified PLLA films increases with the increase of POSS-NH3Cl, and the maximum is up to 11.35 %. (2) Oil resistance of the modified PLLA films is decreased, but it is not affected by the dosage of POSS-NH3Cl. (3) Air permeability of the modified PLLA films is excellently increased, and the maximum is 11.3 g/(m2 ∙ 24 h). (4) Water vapor permeability of the modified PLLA films is obviously decreased, and the minimum is 38.5 g/(m2 ∙ 24 h) which is obviously lower than that of PLLA films (112.7 g/ (m2 · 24 h)).
Keywords PLLA POSS-NH3Cl Water vapor permeability
100.1
Modified PLLA films Air permeability
Introduction
Polylactic acid (PLLA) is one of the simplest and fully biodegradable new synthetic polyesters and has been produced from renewable resources [1–4]. PLLA has many good properties including innocuity, non-pollution, biodegradability, biocompatibility, and bioabsorbability. [5–7]. However, the application of PLLA is strictly restricted because of its defects, for example, hydrophobicity, high brittleness, difficult control degradation period, and high cost. In recent years, many methods such as copolymer synthesis polymer blending and reinforced composite have been X. Zhang (&) School of Media and Design, Hangzhou Dianzi University, Zhejiang, China e-mail: [email protected] Y. Zhang Media Communication System, Dongguan Polytechnic, Guangdong, China © Springer Science+Business Media Singapore 2016 Y. Ouyang et al. (eds.), Advanced Graphic Communications, Packaging Technology and Materials, Lecture Notes in Electrical Engineering 369, DOI 10.1007/978-981-10-0072-0_100
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used to overcome these disadvantages. The modified reagents include not only organic polymers or inorganic substances [7] but also nanocomposites [8, 9]. Compared with other inorganic nanofillers, POSS can greatly improve comprehensive properties of PLLA composites [10–13]. Up to now, although the method of blending PLLA with POSS has been studied [11, 12], only a few studies on POSS grafting with PLLA have been researched [13]. In the article [13], POSS-PLA (polylactide tethered with POSS) is synthesized via the ring-opening polymerization of L-lactide with 3-hydroxylhep-taisobytyl (POSS), and then, the properties of PLLA blended with POSS-PLA are studied. The paper is studied based on the previous research [14]. Firstly, star-shaped polylactic acid with polyhedral oligomeric silsesquioxane (POSS-g-PLLA) is synthesized. Secondly, the modified PLLA films are prepared. Thirdly, the water absorption, oil resistance, air permeability, and water vapor permeability of the modified PLLA films are charact
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