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Novel Nanocellulose/Polymer Composite Aerogel as Solid‐State Fluorescence Probe by Pickering Emulsion Route
Macromolecular Materials and Engineering ( IF 4.2 ) Pub Date : 2020-09-13 , DOI: 10.1002/mame.202000467 Shuai Li 1 , Changbing Zhou 1 , Yingying He 1 , Hongxia Liu 1 , Li Zhou 1 , Chuanbai Yu 1 , Chun Wei 1 , Chaoyang Wang 2
Macromolecular Materials and Engineering ( IF 4.2 ) Pub Date : 2020-09-13 , DOI: 10.1002/mame.202000467 Shuai Li 1 , Changbing Zhou 1 , Yingying He 1 , Hongxia Liu 1 , Li Zhou 1 , Chuanbai Yu 1 , Chun Wei 1 , Chaoyang Wang 2
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In this study, cellulose nanofibrils (CNF)/polymer (nonwater soluble) composite aerogels are facilely fabricated using CNF‐stabilized Pickering emulsion gel technology combined with the freeze‐drying method. Pior to the formation of the O/W Pickering emulsion stabilized by the CNF, a nonwater‐soluble polymer, such as polymethyl methacrylate, polylactic acid (PLA), polycabonate, polystyrene, and so on, is dissolved into the oil phase, and the CNF are effectively dispersed in the water phase. The subsequent gelation of the Pickering emulsion through ultrasonic emulsification followed by freeze‐drying is carried out to obtain the CNF/polymer composite aerogels. The obtained CNF/polymer with a low density of ≈0.01g cm−3 have better dimentional stability and mechanical properties compared with the pure CNF aerogel. Additionally, 1,4‐dihydroxyanthraquinone (1,4‐DHAQ, a fluorophore) is loaded into the A‐CNF/PLA composite aerogel by dissolving it along with PLA into the oil phase to form a novel solid‐state fluorescence probe for Cu2+ detection with an extremely low detection concentration of 10−8 mol L−1. Interestingly, neither solvent exchange nor chemical reaction (or polymerization) is required in the preparation of aerogels. This study provides a facile and universal route for the fabrication of CNF/polymer composite aerogels and the development of their functional products.
中文翻译：
新型纳米纤维素/聚合物复合气凝胶作为固体荧光探针的Pickering乳液路线
在这项研究中，使用CNF稳定的Pickering乳液凝胶技术结合冷冻干燥方法，可以轻松制造纤维素纳米原纤维（CNF）/聚合物（非水溶性）复合气凝胶。在CNF稳定的O / W Pickering乳液形成之前，一种非水溶性聚合物（例如聚甲基丙烯酸甲酯，聚乳酸（PLA），聚碳酸酯，聚苯乙烯等）被溶解到油相中，并且CNF有效地分散在水相中。随后通过超声波乳化随后冷冻干燥的Pickering乳液胶凝，以获得CNF /聚合物复合气凝胶。获得的CNF /聚合物的密度低至≈0.01gcm -3 与纯CNF气凝胶相比，具有更好的尺寸稳定性和机械性能。此外，将1,4-二羟基蒽醌（1,4-DHAQ，一种荧光团）与ALA一起溶解在A-CNF / PLA复合气凝胶中，使其形成油相，从而形成一种新型的Cu 2固态荧光探针。+检测的检测浓度极低，为10 -8 mol L -1。有趣的是，在制备气凝胶时既不需要溶剂交换也不需要化学反应（或聚合）。该研究为CNF /聚合物复合气凝胶的制备及其功能产品的开发提供了一条简便而通用的途径。
更新日期：2020-11-16
中文翻译：
新型纳米纤维素/聚合物复合气凝胶作为固体荧光探针的Pickering乳液路线
在这项研究中，使用CNF稳定的Pickering乳液凝胶技术结合冷冻干燥方法，可以轻松制造纤维素纳米原纤维（CNF）/聚合物（非水溶性）复合气凝胶。在CNF稳定的O / W Pickering乳液形成之前，一种非水溶性聚合物（例如聚甲基丙烯酸甲酯，聚乳酸（PLA），聚碳酸酯，聚苯乙烯等）被溶解到油相中，并且CNF有效地分散在水相中。随后通过超声波乳化随后冷冻干燥的Pickering乳液胶凝，以获得CNF /聚合物复合气凝胶。获得的CNF /聚合物的密度低至≈0.01gcm -3 与纯CNF气凝胶相比，具有更好的尺寸稳定性和机械性能。此外，将1,4-二羟基蒽醌（1,4-DHAQ，一种荧光团）与ALA一起溶解在A-CNF / PLA复合气凝胶中，使其形成油相，从而形成一种新型的Cu 2固态荧光探针。+检测的检测浓度极低，为10 -8 mol L -1。有趣的是，在制备气凝胶时既不需要溶剂交换也不需要化学反应（或聚合）。该研究为CNF /聚合物复合气凝胶的制备及其功能产品的开发提供了一条简便而通用的途径。
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