季铵硅烷制备的结冷胶、羧甲基纤维素钠和二氧化硅纳米复合材料的灵活三元组合：流变、热和抗菌性能,ACS Omega

当前位置： X-MOL 学术 › ACS Omega › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

季铵硅烷制备的结冷胶、羧甲基纤维素钠和二氧化硅纳米复合材料的灵活三元组合：流变、热和抗菌性能
ACS Omega ( IF 3.7 ) Pub Date : 2020-10-27 , DOI: 10.1021/acsomega.0c04087
Balasubramanian Rukmanikrishnan ₁ , Chaehyun Jo ₁ , Seungjin Choi ₁ , Srinivasan Ramalingam ₂ , Jaewoong Lee ₁

Affiliation

采用传统溶液流延法成功制备了结冷胶-羧甲基纤维素钠（GC）基复合薄膜，其中含有不同浓度的二氧化硅（SiO ₂）纳米粒子和十八烷基二甲基-（3-三乙氧基甲硅烷基丙基）氯化铵（ODDMAC），以提高结冷胶-羧甲基纤维素钠（GC）基复合薄膜的性能。抗菌和防水性能。_{傅里叶变换红外(FT-IR)光谱证实了GC和纳米SiO 2}之间氢键的形成。通过 FT-IR、广角 X 射线衍射和扫描电子显微镜 (SEM) 分析研究了微观结构和物理化学性质。GC-SiO ₂水凝胶的流变特性也得到了表征。结果表明，SiO ₂纳米颗粒的加入显着改善了GC水凝胶的粘度和粘弹性能。GC-SiO ₂水凝胶表现出剪切稀化行为，并且在高剪切速率下其粘度降低。GC复合材料的储能模量和损耗模量随着频率和SiO ₂浓度的增加而增加。添加SiO ₂和ODDMAC后，GC复合材料的拉伸强度和断裂伸长率分别提高了75.9%和62%。此外，纳米SiO _{2降低了GC-SiO}₂复合材料的水蒸气渗透性并增加了疏水性能。热重分析表明，T _5%损失在 99.4–128.6 °C 范围内，炭产率在 20.1–29.9% 范围内，SiO ₂纳米粒子的掺入显着提高了炭产率。GC-SiO ₂ (ODDMAC) 纳米复合材料有效屏蔽紫外线，并对六种不同的病原体表现出高抗菌活性。简单且经济高效的 GC-SiO ₂ (ODDMAC) 纳米复合材料在食品包装和生物医学应用中越来越重要。

"点击查看英文标题和摘要"

Flexible Ternary Combination of Gellan Gum, Sodium Carboxymethyl Cellulose, and Silicon Dioxide Nanocomposites Fabricated by Quaternary Ammonium Silane: Rheological, Thermal, and Antimicrobial Properties

Gellan gum–sodium carboxymethyl cellulose (GC)-based composite films with various concentrations of silicon dioxide (SiO₂) nanoparticles and octadecyldimethyl-(3-triethoxy silylpropyl)ammonium chloride (ODDMAC) were successfully prepared by the traditional solution casting method to improve the antimicrobial and water repellent properties. Fourier transform infrared (FT-IR) spectra confirm the formation of hydrogen bonds between the GC and nano-SiO₂. The microstructure and physicochemical properties were investigated by FT-IR, wide-angle X-ray diffraction, and scanning electron microscopy (SEM) analyses. The rheological properties of the GC–SiO₂ hydrogel were also characterized. The results show that the inclusion of SiO₂ nanoparticles significantly improved the viscosity and viscoelastic properties of the GC hydrogel. The GC–SiO₂ hydrogel exhibited shear-thinning behavior and its viscosity decreased at high shear rates. The storage and loss moduli of the GC composites increased as the frequency and SiO₂ concentration increased. The tensile strength and elongation at break of the GC composites increased by 75.9 and 62%, respectively, with the addition of SiO₂ and ODDMAC. In addition, nano-SiO₂ decreased the water vapor permeability and increased the hydrophobic properties of the GC–SiO₂ composites. Thermogravimetric analysis showed that the T_5% loss was in the range of 99.4–128.6 °C and the char yield was in the range of 20.1–29.9%, which was significantly enhanced by the incorporation of SiO₂ nanoparticles. The GC–SiO₂ (ODDMAC) nanocomposites effectively shielded the UV light and exhibited high antimicrobial activity against six different pathogens. The simple and cost-effective GC–SiO₂ (ODDMAC) nanocomposites gained importance in food packaging and biomedical applications.

更新日期：2020-11-12

点击分享查看原文

点击收藏

公开下载

阅读更多本刊新发论文本刊介绍/投稿指南