TiO₂-KH550 Nanoparticle-Reinforced PVA/xylan Composite Films with Multifunctional Properties.
TiO₂-KH550 Nanoparticle-Reinforced PVA/xylan Composite Films with Multifunctional Properties.
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DOI：
10.3390/ma11091589
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发表时间：
2018-09-02
期刊：
影响因子：
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通讯作者：
Zhang C
中科院分区：
文献类型：
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作者：
Liu X;Chen X;Ren J;Zhang C
为了提高聚乙烯醇（PVA）/木聚糖复合膜的强度并赋予其紫外线屏蔽能力，制备了纳米TiO 2-KH 550，并将其添加到PVA/木聚糖基体中。在超声和搅拌作用下，纳米TiO 2-KH 550在0.04%六偏磷酸钠（SHMP）溶液中分散良好。薄膜性能的研究表明，TiO 2-KH 550对提高复合薄膜的强度、防潮性和氧气阻隔性具有积极的影响。当TiO 2-KH 550的添加量为1.5%时，复合材料的拉伸强度最大（27.3 MPa），透水汽率最小（2.75 × 10−11 g·m−1·s−1·Pa−1），透氧率最小（4.013 cm 3·m−2·24 h−1·0.1MPa−1）。TiO 2-KH 550增强复合膜的拉伸强度比纯PVA/木聚糖复合膜提高了70%，水蒸气渗透率和氧气渗透率分别降低了31%和41%。当TiO 2-KH 550的添加量为PVA和木聚糖总质量的1.5~2.5%时，膜在400 nm处的紫外光透过率几乎为零，表明PVA/木聚糖复合膜具有良好的紫外光屏蔽能力。
In order to improve the strength of polyvinyl alcohol (PVA)/xylan composite films and endow them with ultraviolet (UV) shielding ability, TiO2-KH550 nanoparticles was synthesized and added into the PVA/xylan matrix. The TiO2-KH550 nanoparticle dispersed well in the 0.04% sodium hexametaphosphate (SHMP) solution under ultrasonic and stirring treatments. Investigations on the properties of the films showed that TiO2-KH550 had the positive impact on improving the strength, moisture, and oxygen barrier properties of the composite films. The maximum tensile strength (27.3 MPa), the minimum water vapor permeability (2.75 × 10−11 g·m−1·s−1·Pa−1), and oxygen permeability (4.013 cm3·m−2·24 h−1·0.1MPa−1) were obtained under the addition of 1.5% TiO2-KH550. The tensile strength of TiO2-KH550 reinforced composite film was increased by 70% than that of the pure PVA/xylan composite film, and the water vapor and oxygen permeability were decreased by 31% and 41%, respectively. Moreover, the UV transmittance of the film at the wavelength of 400 nm was almost zero when adding ≈1.5~2.5% (weight ratio, based on the total weight of PVA and xylan) of TiO2-KH550, which indicated the PVA/xylan composite films were endowed with an excellent UV light shielding ability.