RSC Advances
·
2015
·Vol. 5
·期 48
·38382-38390
·
IF 3.84
Q. Zhong,Y. Y. Chen,S. L. Guan,Q. S. Fang,T. Chen,P. Müller-Buschbaum,J. P. Wang
The smart cleaning ability of cotton fabrics is realized by cross-linking thermo-responsive random copolymer to the cotton. Poly(2-(2-methoxyethoxy)ethoxyethyl methacrylate-co-ethylene glycol methacrylate), denoted as P(MEO2MA-co-EGMA), is synthesized from 2-(2-methoxyethoxy)ethoxyethyl methacrylate (MEO2MA) and ethylene glycol methacrylate (EGMA) with a molar ratio of 17 : 3. Its dilute aqueous solution (1 mg mL−1) presents a lower critical solution temperature (LCST) of 38 °C. Furthering increase the solution concentration, the LCST shifts towards lower temperature. By applying citric acid as a cross-linker, P(MEO2MA-co-EGMA) is successfully immobilized onto cotton fabrics. The obtained cotton fabrics also possess thermo-responsive property with a LCST at 37 °C. The smart cleaning ability is confirmed by single fiber cleaning experiments using a confocal microscope. It is observed that the cleaning ability of the cotton with cross-linked P(MEO2MA-co-EGMA) can be prominently enhanced at low temperature (below LCST). In addition, due to the low glass transition temperature of P(MEO2MA-co-EGMA) (−26 °C), the polymer is in a gel state at room temperature and will not negatively impact fabric softness. P(MEO2MA-co-EGMA) is a promising candidate for preparing textiles with smart cleaning ability and great fabric hand.
研究领域:
材料科学
·
纺织工程
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2017
·
IF 3.833
Mingwei Zhao,Mingwei Gao,Caili Dai,Chenwei Zou,Zhe Yang,Xuepeng Wu,Yifei Liu,Yining Wu,Sisi Fang,Wenjiao Lv
Smart wormlike micelles with stimuli-tunable rheological properties may be useful in a variety of applications, such as in molecular devices and sensors. The formation of triplestimuli-responsive systems so far has been a challenging and important issue. In this work, a novel triplestimuli (photo-, pH-, and thermoresponsive) wormlike micelle is constructed with N-cetyl-N-methylmorpholinium bromide and trans-cinnamic acid (CA). The corresponding multiresponsive behaviors of wormlike micellar system were revealed using cryogenic transmission electron microscopy, a rheometer, and 1H NMR. The rheological properties of wormlike micellar system under different temperatures, pH conditions, and UV irradiation times are measured. As confirmed by 1H NMR, chemical structure of a CA molecule can be altered by the multiple stimulation from an exotic environment. We expect it to be a good model for triple-responsive wormlike micelles, which is helpful to understand the mechanism of triple-responsiveness and widen their applications.
研究领域:
化学
·
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Changyue Xu,Zhuo Chen,Chaoxia Wang,Kunlin Chen
By designing and preparing multifunctional materials exhibiting self-healing ability, problems related to their durability outdoors can be solved. This study, inspired by the self-healing mechanism of natural creatures, successfully prepared a dual self-healing multifunctional coating using temperature stimuli-responsive multicompartment microcapsules. Phase change materials (PCMs) were employed to load multicompartment microcapsules that were produced through Pickering emulsion polymerization by applying hydrophobic materials encapsulated by titanium dioxide (TiO2) nanocapsules as Pickering emulsifiers. The multifunctional coating produced using microcapsules and self-healing waterborne polyurethane (WPU) exhibited thermal insulation and antireflection properties, which was attributed to the application of PCMs and TiO2, and it also achieved remarkable superhydrophobicity. Moreover, this coating exhibited the intrinsic and superficial dual self-healing ability, which was attributed to the release of hydrophobic materials from microcapsules and the self-healing ability of WPU. This study can be referenced to guide the fabrication of high-performance self-healing materials, and it can contribute to the long-term use of multifunctional coatings.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Zhijuan Sun,Yuting Li,Si Yu Zheng,Shihua Mao,Xiaomin He,Xiaoyu Wang,Jintao Yang
Intelligent polymer nanocapsules that can not only encapsulate substances efficiently but also release them in a controllable manner hold great potential in many applications. To date, although intensive efforts have been made to develop intelligent polymer nanocapsules, how to construct the well-defined core/shell structure with high stability via a straightforward method remains a considerable challenge. In this work, the target novel zwitterionic nanocapsules (ZNCs) with a stable hollow structure were synthesized by inverse reversible addition fragmentation transfer (RAFT) miniemulsion interfacial polymerization. The shell gradually grew from the water/oil interface due to the interfacial polymerization, accompanied by the cross-linking of the polyzwitterionic networks, where the core/shell structure could be well-tuned by adjusting the precursor compositions. The resultant ZNCs exhibited a salt-/thermo-induced swelling behavior through the phase transition of the external zwitterionic polymers. To further investigate the functions of ZNCs, different substances, such as methyl orange and bovine serum albumin (BSA), were encapsulated into the ZNCs with a high encapsulation efficiency of 89.3 and 93.6%, respectively. Interestingly, the loaded substances can be controllably released in aqueous solution triggered by salt or temperature variations, and such responsiveness also can be utilized to bounce off the bacteria adhered on target surfaces. We believe that these designed salt- and thermo-responsive intelligent polymer nanocapsules with well-defined core/shell structures and antifouling surfaces should be a promising platform for biomedical and saline related applications.
研究领域:
材料科学
·
生物医学工程
·
高分子化学
✓ 已验证
DOI
PubMed
高影响因子
ULTRASONICS SONOCHEMISTRY
·
2019
·
IF 7.279
F. Chen,C. Dong,C. Chen,W.D. Yin,W. Zhai,X.Y. Ma,B. Wei
Ultrasonic synthesis has shown great potential applications in preparing varieties of nanostructured materials. However, fabrication of nanomaterials with tunable structures and desirable properties is still challenging because of the instability and nonuniform distribution of cavitation effect in liquid phase. In this study, a novel aeration tuned ultrasonic synthesis approach is proposed for optimizing the cavitation effect in both time and space scales and fabricating SiO 2 @PNIPAm NPs. By alternation of ultrasonication and N 2 aeration, more and more gas bubbles are formed in the reaction liquid, and the collapse of those bubbles is further enhanced by the reactants of solid SiO 2 and intermediate functionalized SiO 2 NPs. As a result, SiO 2 @PNIPAm NPs with various grafting ratios are successfully synthesized simply by changing the number of ultrasonic synthesis cycle. The SiO 2 @PNIPAm NPs are subsequently used as stabilizer to form Pickering emulsions with different temperature response. This work provides a potential facile sonochemical synthesis method with high efficiency in obtaining inorganic/organic NPs of well determined structures.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MONATSHEFTE FUR CHEMIE
·
2016
·Vol. 148
·期 7
·1205-1213
·
IF 1.131
Zhou Zhiping,Hao Tongfan,Xia Li,Nie Yijing,Li Songjun
Abstract A novel hyperbranched multi-arms star block copolymer with magnetic oriented target and thermo-responsive characters was synthesized. The atom transfer radical polymerization initiators were anchored on the surfaces of magnetic mesoporous silica by the chemical reaction of surface-modified amides with α -bromoisobutyryl bromide. The composites (Fe x O y @SBA-15@HPCMS-g-PNIPAAm) with magnetic mesoporous silica nanoparticles as core and hyperbranched star block copolymers as arms were prepared by iron(III)-mediated surface-initiated polymerization with FeCl 3 ·6H 2 O as catalyst, PPh 3 as ligand, ascorbic acid as reducing agent, N , N -dimethylformamide as solvent, and 4-chloromethylstyrene (CMS) and N -isopropylacrylaminde (NIPAAm) as monomer, respectively. The resultant materials were characterized by Fourier transform infrared, thermogravimetric analysis, N 2 adsorption/desorption measurements, scanning electron microscopy, transmission electron micrographs, differential scanning calorimeter, and vibrating sample magnetometer. With aspirin as model drug, the drug release behavior of the hybrid materials was investigated in detail. Due to both the thermo-responsive and the magnetic property, the product may be used as a drug delivery system aiming at a cancer treatment. Graphical abstract
研究领域:
材料科学
·
药学
·
生物医学工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yue Wu,Ruikang Sun,Yaqun Han,Shufen Zhang,Suli Wu
Thermochromic photonic crystals (PC) have been extensively studied owing to their potential applications in displays, smart windows, sensors, and anti-counterfeiting devices. However, the poor water-retention capacity of the traditional hydrogel-based thermoresponsive PCs makes them unstable, and their color change is realized by immersion in water. Although polymer elastomer-based PC can increase stability, their response range as well as sensitivity is dramatically decreased. In this study, an ultrathin polymer-filled ZnS@SiO 2 PC film with long-term stability and ultrasensitive thermochromism is presented. The polymer provides the film with excellent stability, and the ultrathin PC structure ensures that the film exhibits distinguished thermochromism in air rather than in water, owing to condensation. The structural color changed from violet to near-infrared, and the change in the reflection wavelength was as high as 300 nm when the temperature decreased from 15 °C to 5 °C. Furthermore, an ultrathin PC layer was applied to fabricate thermochromic smart fabrics. This work demonstrates the design and fabrication of ultrathin PC films, as well as their ultrasensitive response and high stability, presenting a platform for combining different types of functionalized polymer materials and achieving more ingenious responsive effects.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Yanxiong Pan,Bingrui Li,Zhi Liu,Zhongyu Yang,Xu Yang,Kai Shi,Wei Li,Chao Peng,Weicai Wang,Xiangling Ji
Poly(N-isopropylacrylamide) (PNIPAAm), a typical thermoresponsive polymer, exhibits potential application in smart materials. However, bulk PNIPAAm hydrogel monoliths undergo slow volume phase transition at least tens of minutes to hours as determined by the shape and size of polymers due to the formation of the skin layer. In this regard, novel macroporous sponges with rapid thermoresponse are prepared via grafting polymerization of N-isopropylacrylamide (NIPAAm) onto the macroporous poly(vinyl alcohol) formaldehyde (PVF) network as confirmed by attenuated total reflection-infrared (ATR IR) and 1H NMR spectra. As prepared PVF-g-PNIPAAm sponges display interconnected open-cell structures, and their average pore sizes and porosities are ∼90 μm and >85%, respectively. The equilibrium swelling ratio of PVF-g-PNIPAAm sponges varies from 11 to 50 with temperature. The volume phase transition temperature is at 30–34 °C, as detected in the DSC curves of swollen samples. These features indicate that the existence of the original PVF network exerts almost no influence on the PNIPAAm temperature responsibility. As prepared samples can reach the swelling equilibrium in less than 80 s, and their rapid swelling kinetics can be fitted using the pseudo-first-order rate kinetic equation. Notably, the samples also display rapid deswelling rate in less than 40 s at relative high temperature (48 °C), thereby indicating a superfast responsive behavior to temperature change. The PVF-g-PNIPAAm sponges exhibit rapid and reversible thermoresponse in repeatable swelling–deswelling cycles, which can satisfy the need of special smart materials. In particular, combined with iodine solution (i.e., PVF-g-PNIPAAm/I2), these sponges can serve as a novel temperature indicator and exhibit excellent antibacterial performances.
研究领域:
材料科学
·
高分子化学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymer Chemistry
·
2012
·Vol. 4
·期 6
·1815-1825
·
IF 5.321
Jiucun Chen,Mingzhu Liu,Honghong Gong,Guangjun Cui,Shaoyu Lü,Chunmei Gao,Feng Huang,Tongtong Chen,Xinyu Zhang,Zhen Liu
Well-defined linear amphiphilic tetrablock quaterpolymers with dual stimulus response, poly(ethylene glycol)-b-poly(styrene)-b-poly(N-isopropylacrylamide)-b-poly(2-(dimethylamino)ethyl methacrylate) (PEG-b-PS-b-PNIPAM-b-PDMAEMA), were successfully synthesized through the combination of ATRP and RAFT by a click chemistry site transformation approach. Bromine-terminated diblock copolymer PEG-b-PS-Br was first prepared by ATRP of styrene initiated with macro-initiator PEG-Br, which was prepared from the esterification of PEG and 2-bromoisobutyryl bromide. PEG-b-PS-Br can then be converted into the azido-terminated diblock copolymer, PEG-b-PS-N3, by nucleophilic substitutions. Site transformation of PEG-b-PS-N3 into a macro-chain transfer agent (CTA) for RAFT polymerization was accomplished using a copper-catalyzed click chemistry approach. Afterwards, the novel linear tetrablock quaterpolymers, PEG-b-PS-b-PNIPAM-b-PDMAEMA, were synthesized by successive RAFT polymerizations of NIPAM and DMAEMA. The polymerization data indicated that both RAFT processes were well controlled. The structures of the linear amphiphilic tetrablock quaterpolymers and the corresponding precursors were characterized by 1H NMR, FTIR and GPC. Containing thermoresponsive PNIPAM and pH-responsive PDMAEMA blocks, the obtained amphiphilic PEG-b-PS-b-PNIPAM-b-PDMAEMA tetrablock quaterpolymers self-assembled into spherical micelles with hydrophobic PS cores and hydrophilic PEG/PNIPAM/PDMAEMA shells at acidic pH and room temperature but self-assembled into PS/PDMAEMA-core micelles at alkaline pH and room temperature, and PS/PNIPAM-core micelles at acidic pH and elevated temperatures.
研究领域:
高分子化学
·
纳米材料
·
药物递送
·
智能响应材料
·
生物医用高分子
·
自组装
·
聚合物化学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 17
·7893-7899
·
IF 3.591
L. Z. Liu,X. Y. Sun,Z. Y. Yan,B. F. Ye
Particle-based delivery systems have emerged as a powerful platform in controlled drug release. In the present study, we developed a new inverse opal hydrogel microcarrier system composed of gold nanorods (AuNRs) for near-infrared light (NIR) activated drug delivery. AuNRs with a desired aspect ratio were prepared by a seed-mediated growth method. The inverse opal hydrogel microcarriers composited with AuNRs were synthesized by negatively replicating silica colloidal crystal beads (SCCBs). The NIR-thermo response of the microcarriers was due to the NIR photothermal heating effect of AuNRs and the thermo responsive volume transition of poly(N-isopropylacrylamide) (pNIPAM) hydrogel. It was found that the NIR-controlled reversible shrinking response of the microcarriers was ideal for the controllable drug release with real-time self-reporting color indication.
研究领域:
材料科学
·
药学
·
纳米技术
·
药物递送系统
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Wei Wu,Jianxi Liu,Xiao Lin,Zhengze He,Hui Zhang,Le Ji,Peiwei Gong,Feng Zhou,Weimin Liu
This paper demonstrates the hybridization of copolymer microgel with drug-loaded metal–organic frameworks nanoparticles that can achieve excellent aqueous lubricating performance and anti-inflammatory effect for synergistic treatment of osteoarthritis (OA). Poly(ethylene glycol)- graft -poly( N -isopropylacrylamide) (PEG-g-PNIPAm) microgel layer is grown on the MIL-101(Cr) surface via one-pot soap-free emulsion polymerization method. The lower critical solution temperature of the MIL-101(Cr)@PEG-g-PNIPAm hybrid is raised significantly by incorporating PEG chains into the PNIPAm microgel matrix, which greatly enhances the high-temperature aqueous dispersion stability. The hybrid microgel demonstrated reversibly thermo-sensitive swelling-collapsing behavior to modulate the optical properties and hydrodynamic size. Using as aqueous lubricating additives, the hybrid reduces over 64% and 97% in friction coefficient and wear volume. Also, the hybrid supports desirable temperature-controlled lubrication modulation due to their reversible thermo-responsive behavior, which is benefit to joint lubrication of OA. After encapsulating anti-inflammatory diclofenac sodium (DS), the DS-MIL-101(Cr)@PEG-g-PNIPAm shows thermo-responsive drug release in aqueous media, which can improve the drug-delivery efficiency. By co-culturing the DS-loaded hybrid with human normal chondrocytes, we demonstrate good biocompatibility and anti-inflammatory effect on the chondrocytes with inflammation by regulating the expression of OA-related genes and proteins. Our work establishes multifunctional MOFs-based hybrid microgel systems for advanced colloids modulation and biomedical application.
研究领域:
材料科学
·
生物医学工程
·
药学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 14
·2007457
·
IF 18.808
Lei Zhou,Cong Dai,Lei Fan,Yuhe Jiang,Can Liu,Zhengnan Zhou,Pengfei Guan,Yu Tian,Jun Xing,Xiaojun Li,Yian Luo,Peng Yu,Chengyun Ning,Guoxin Tan
Biocompatible hydrogel adhesives with multifunctional properties, including injectability, fast self-healing, and suitable on-demand detachment, are highly desired for minimally invasive procedures, but such materials are still lacking. Herein, an injectable self-healing biocompatible hydrogel adhesive with thermoresponsive reversible adhesion based on two extracellular matrix-derived biopolymers, gelatin and chondroitin sulfate, is developed to be used as a surgical adhesive for sealing or reconnecting ruptured tissues. The resulting hydrogels present good self-healing and can be conveniently injected through needles. The strong tissue adhesion at physiological temperatures originates from the Schiff base and hydrogen bonding interactions between the hydrogel and tissue that can be weakened at low temperatures, thereby easily detaching the hydrogel from the tissue in the gelation state. In vivo and ex vivo rat model show that the adhesives can effectively seal bleeding wounds and fluid leakages in the absence of sutures or staples. Specifically, a proof of concept experiment in a damaged rat liver model demonstrates the ability of the adhesives to act as a suitable laparoscopic sealant for laparoscopic surgery. Overall, the adhesive has several advantages, including low cost and ease of production and application that make it an exceptional multifunctional tissue adhesive/sealant, effective in minimally invasive surgical applications.
研究领域:
生物医学工程
·
材料科学
·
外科技术
·
组织工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）