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High Efficiency Conversion of Regenerated Cellulose Hydrogel Directly to Functionalized Cellulose Nanoparticles
Macromolecular Rapid Communications ( IF 4.2 ) Pub Date : 2017-10-30 , DOI: 10.1002/marc.201700409 Han-Qing Wang 1 , Huang Tan 1 , Sun Hua 1 , Zheng-Ying Liu 1 , Wei Yang 1 , Ming-Bo Yang 1
Macromolecular Rapid Communications ( IF 4.2 ) Pub Date : 2017-10-30 , DOI: 10.1002/marc.201700409 Han-Qing Wang 1 , Huang Tan 1 , Sun Hua 1 , Zheng-Ying Liu 1 , Wei Yang 1 , Ming-Bo Yang 1
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This article provides a novel and efficient method of “self‐assembly/modification/dispersion” for the preparation of functionalized cellulose nanoparticles (CNPs) based on regenerated cellulose hydrogel (RCH). The process of the preparation of CNPs is simplified greatly, which contributes to broadening the utilization of CNPs. Under the given conditions, cellulose chains self‐assemble into nanoparticles, which connect with each other to form strings and walls of nanoparticles inside RCH. Then, RCH acts as the hydrophilic precursor of the preparation of CNPs and is modified by oligo side chains to obtain functionalized RCH with imperfect cellulose II structures. After dispersing the functionalized RCH in dimethyl sulfoxide, individual CNPs are finally isolated from functionalized RCH as a result of the decline of the crystallinity of CNPs. Obtained CNPs possess uniform size and good thermal stability, and also exhibit excellent dispersibility in organic solvents. The particle size of CNPs can be adjusted easily by oligo content and particle size of the self‐assembled cellulose nanoparticles in RCH. Prepared CNPs are promising candidates for polymer modification in terms of fillers, and for biomedical fields with respect to drug delivery.
中文翻译：
再生纤维素水凝胶直接高效转化为功能化纤维素纳米颗粒
本文为基于再生纤维素水凝胶（RCH）的功能化纤维素纳米颗粒（CNP）的制备提供了一种新颖，有效的“自组装/修饰/分散”方法。CNP的制备过程大大简化，有助于扩大CNP的利用。在给定的条件下，纤维素链会自组装成纳米颗粒，它们相互连接形成RCH内部纳米颗粒的细绳和壁。然后，RCH充当CNP制备的亲水前体，并通过寡聚侧链进行修饰以获得具有不完善的纤维素II结构的官能化RCH。在将官能化的RCH分散在二甲基亚砜中后，由于CNP的结晶度下降，最终从官能化的RCH中分离出单独的CNP。所获得的CNP具有均匀的尺寸和良好的热稳定性，并且在有机溶剂中也表现出优异的分散性。CNP的粒径可以通过RCH中寡聚体的含量和自组装纤维素纳米粒子的粒径来轻松调节。制备的CNP在填充剂方面以及聚合物在药物输送方面的生物医学领域都是有望进行聚合物改性的候选物。
更新日期：2017-10-30
中文翻译：
再生纤维素水凝胶直接高效转化为功能化纤维素纳米颗粒
本文为基于再生纤维素水凝胶（RCH）的功能化纤维素纳米颗粒（CNP）的制备提供了一种新颖，有效的“自组装/修饰/分散”方法。CNP的制备过程大大简化，有助于扩大CNP的利用。在给定的条件下，纤维素链会自组装成纳米颗粒，它们相互连接形成RCH内部纳米颗粒的细绳和壁。然后，RCH充当CNP制备的亲水前体，并通过寡聚侧链进行修饰以获得具有不完善的纤维素II结构的官能化RCH。在将官能化的RCH分散在二甲基亚砜中后，由于CNP的结晶度下降，最终从官能化的RCH中分离出单独的CNP。所获得的CNP具有均匀的尺寸和良好的热稳定性，并且在有机溶剂中也表现出优异的分散性。CNP的粒径可以通过RCH中寡聚体的含量和自组装纤维素纳米粒子的粒径来轻松调节。制备的CNP在填充剂方面以及聚合物在药物输送方面的生物医学领域都是有望进行聚合物改性的候选物。
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