Pickering乳剂界面SI-ATRP聚合制备Janus纤维素纳米晶

IF 10.7 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers Pub Date : 2025-05-11 DOI:10.1016/j.carbpol.2025.123731

Yelin Hou , Zhen Zhang , Mohd Azmil Mohd Noor , Gilles Sèbe

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引用次数: 0

摘要

本文报道了一种用界面表面引发原子转移自由基聚合（SI-ATRP）法制备两亲性Janus纤维素纳米晶体（CNCs）的新方法。通过与溴异丁基溴的酯化反应制备了不同数量的溴异丁基修饰的碳纳米管，并用于稳定含有亲水性（n -异丙基丙烯酰胺：NIPAm）和疏水性（苯乙烯：Sty）单体的O/W和W/O ATRP乳液体系。不同的乳液体系随后由固定在油水界面的溴化颗粒引发双相SI-ATRP反应聚合。利用FT-IR、13C CP-MAS NMR、透射电子显微镜（TEM）和光学显微镜对反应后回收的各向异性cnc的化学结构、形貌、两亲性和乳化性能进行了表征。对正乳液体系和反乳液体系的结果进行了比较。

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Preparation of Janus cellulose nanocrystals by interfacial SI-ATRP polymerization of Pickering emulsions

We report an original method to prepare amphiphilic Janus cellulose nanocrystals (CNCs) by interfacial surface-initiated atom transfer radical polymerization (SI-ATRP) of Pickering emulsions stabilized by CNCs bearing ATRP initiating sites at their surface. CNCs decorated with various amounts of bromoisobutyryl moieties were prepared by esterification with bromoisobutyryl bromide, and used to stabilize O/W and W/O ATRP emulsion systems containing both a hydrophilic (N-isopropylacrylamide: NIPAm) and hydrophobic (styrene: Sty) monomer. The different emulsion systems were later polymerized by initiating a biphasic SI-ATRP reaction from the brominated particles immobilized at the oil-water interface. The chemical structure, morphology, amphiphilic and emulsifying properties of the anisotropic CNCs recovered after reaction were characterized by FT-IR spectroscopy, ¹³C CP-MAS NMR spectroscopy, transmission electron microscopy (TEM) and optical microscopy. The results obtained with the direct and inverse emulsion systems were particularly compared.

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来源期刊

Carbohydrate Polymers 化学-高分子科学

CiteScore

22.40

自引率

8.00%

发文量

1286

审稿时长

47 days

期刊介绍： Carbohydrate Polymers stands as a prominent journal in the glycoscience field, dedicated to exploring and harnessing the potential of polysaccharides with applications spanning bioenergy, bioplastics, biomaterials, biorefining, chemistry, drug delivery, food, health, nanotechnology, packaging, paper, pharmaceuticals, medicine, oil recovery, textiles, tissue engineering, wood, and various aspects of glycoscience. The journal emphasizes the central role of well-characterized carbohydrate polymers, highlighting their significance as the primary focus rather than a peripheral topic. Each paper must prominently feature at least one named carbohydrate polymer, evident in both citation and title, with a commitment to innovative research that advances scientific knowledge.