CARBOHYDRATE POLYMERS
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2022
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IF 10.723
Leyi Lin,Zhiping Su,Haishan Zhang,Guowen Zhou,Haonan Zhou,Junli Ren,Xiaoying Wang,Chuanfu Liu,Xiaohui Wang
The increasing environmental burden generated by disposable plastic wastes makes the development of sustainable substitute materials an emergent task. As one of the most abundant bioresources, chitosan (CS) has been considered as a potential candidate for plastic substitution. Conventionally, CS-based materials are fabricated through a solution-processing procedure due to the high crystallinity of CS. Herein, we designed a CS-based material via integrating CS into the network of polyimine (PI), which shows thermomechanical processability similar to plastics. Strong interactions were achieved through dynamic imine bond and hydrogen bond and thus formed a thermo-processable dynamic composite network. These CS-based plastic substitutes exhibit exceptional mechanical performances, excellent thermal/chemical stability, and a series of self-adaptiveness, including re-healing, reprocessing and multi-layer laminating. Notably, CPs can be easily degraded and 100% recycled for the production of next-generation materials. This work provides an alternative route to produce green and sustainable biomass materials as a plastic substitute.
研究领域:
材料科学
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生物工程
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Nano
·
2023
·
IF 17.1
Leilei Liang,Ruoling Yu,Samuel Jun Hoong Ong,Yi Yang,Baoshan Zhang,Guangbin Ji,Zhichuan J. Xu
Mechano-optical systems with on-demand adaptability and a broad spectrum from the visible to microwave are critical for complex multiband electromagnetic (EM) applications. Most existing material systems merely have dynamic optical or microwave tunability because their EM wave response is strongly wavelength-dependent. Inspired by cephalopod skin, we develop an adaptive multispectral mechano-optical system based on bilayer acrylic dielectric elastomer (ADE)/silver nanowire (AgNW) films, which reconfigures the surface morphology between wrinkles and cracks via mechanical contraction and stretching. Such morphological evolution regulates the direct transmission/reflection and scattering behavior of visible–infrared light and simultaneously alters the conductive network in a AgNW film to influence its microwave characteristics. The designed system features switching between visible–infrared–microwave transparency and opacity, continuous regulation, wide spectral window (0.38–15.5 μm and 24,200–36,600 μm), excellent recyclability (500 times), and rapid response time (<1 s). These grant the system great potential as platforms for various promising applications such as smart windows, switchable EM devices, dynamic thermal management, adaptive visual stealth, and human motion detection.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
PubMed
高影响因子
BIOCONJUGATE CHEMISTRY
·
2021
·
IF 4.774
Meiling He,Yi Hou,Ce Zhu,Miaomiao He,Yulin Jiang,Ganjun Feng,Limin Liu,Yubao Li,Chen Chen,Li Zhang
A three-dimensional (3D) printed biodegradable hydrogel scaffold with a strong self-expanding ability to conform to the contour of irregular bone defects and be closely adjacent to host tissues is reported herein. The scaffold has a triple cross-linked network structure consisting of photo-cross-linked polyacrylamide (PAAM) and polyurethane (PU) as the primary IPN network and chemical cross-linked gelatin (Gel) as the secondary network, which confers the scaffold with good mechanical properties. The addition of PU in the polymerization process of acrylamide (AAM) can improve the ultraviolet (UV) photocuring efficiency of the hydrogel and incorporate abundant hydrogen bonds between the PAAM copolymer chain and the PU chain. The results show that the hydrogel scaffold contains regular structures with smooth morphology, excellent dimensional stability, and uniform aperture. The degradation rate of the hydrogel scaffold is controllable through adjusting cross-linking agents and can be up to about 60% after degradation for 28 days. More importantly, the rapid self-inflating characteristic of the scaffold in water, that is, the volume of hydrogel scaffold can increase to about 8 times that of their own in an hour and can generate a slight compressive stress on the surrounding host tissue, thus stimulating the reconstruction and growth of new bone tissues. The in vitro experiment indicates that the scaffold is nontoxic and biocompatible. The in vivo experiment shows that the PU/PAAM/Gel chemically cross-linked scaffold displays the desirable osteogenic capability. This UV-curable 3D printed self-adaptive and degradable hydrogel scaffold holds great potential for nonload-bearing bone repair.
研究领域:
生物材料学
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组织工程学
·
再生医学
✓ 已验证
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2024
·
IF 5.3
Jinrui Liang,Kai Le,Yuzhen Liu,Young-Jun Jang,Fengchun Jiang,Zhenlin Yang,Haixin Li,Shusheng Xu,Weimin Liu
To improve the friction and wear performance of coatings in aerospace engineering under wet and dry alternating conditions, the porous hard TiCN coating was prepared by a combination of multi-arc ion plating and oblique angle deposition. The study found that when the titanium target current was reduced from 80 A to 60 A, the pore size of the porous TiCN coating increased from 0.30 μm to 0.93 μm. In comparison to the low hardness of stainless steel substrate of 3.4 GPa, the hardness of TiCN coatings with pore sizes of 0.93 and 0.30 μm rose to 10 and 22 GPa, respectively. The existence of pores can effectively improve the hydrophilicity of the coatings. However, as the pore size increased, the anti-wear lifetime of the coatings were also decrease. This process was followed by ultrasonication and hydrogen reduction of (NH 4 ) 2 MoS 4 to infuse MoS 2 directly into the pores to fabricate the TiCN-MoS 2 composite coatings. The findings revealed MoS 2 atomic sheets are randomly embedded in the pores of the TiCN coating. In a stable humidity environment, as the relative humidity increased, the friction coefficient of the TiCN-MoS 2 porous composite coating increased and the anti-wear lifetime decreased. In addition, the anti-wear lifetime of the TiCN-MoS 2 porous composite coating at 20 % relative humidity environment is 128,322 laps, which exceeded the 38,099 laps of the dense TiCN-MoS 2 composite coating. This proved that the porous composite coating had better anti-wear lifetime due to the continuous release of MoS 2 in the pores under low humidity conditions. The tribological behavior of the porous composite coatings was systematically investigated under alternating humidity conditions, with a comparison against the dense TiCN-MoS 2 composite coatings. The porous composite coatings possessed better self-adaptation under alternating humidity conditions, with coefficients of friction of 0.05 and 0.15 at 10 % and 70 % RH air, respectively. A detailed discussion was conducted on the relationship between tribofilm composition and tribological properties under different humidity environments.
研究领域:
材料科学
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表面工程
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航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2022
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IF 6.633
Ming Lei,Weian Huang,Yuanhui Tong,Jinsheng Sun,Zhehui Jin,Xuan Li,Weiqing Chen
The increasing oil–gas explorations in microporous formations and the intensified environmental requirements necessitate the development of high-performance, environmentally friendly and sustainable plugging materials to maintain wellbore stability in drilling engineering. In this work, a series of graft copolymers of carboxymethyl chitosan- g -poly(oligo(ethylene glycol) methyl ether methacrylate- co -acrylic acid) (GCOA) is synthesized through free-radical graft-from polymerization. The oligo(ethylene glycol) methyl ether methacrylate (OEGMA) and acrylic acid (AA) can be well copolymerized in the grafts as confirmed by structural characterizations, and the incorporation of AA improves the grafting ratio and grafting efficiency. All obtained GCOAs possess the temperature-responsive aggregation behavior, which causes the formation of aggregated meso -assemblies from original nano-micelles when heating above their lower critical solution temperature (LCST), accompanied by the phase separation. Meanwhile, the presence of AA segments increases the LCST due to the resistance of enhanced polymer–polymer electrostatic repulsion to the hydrophobic attraction. By the delicate control of AA molar ratio from 0 to 50 mol%, the LCST values of GCOAs can be adjusted from 90 °C to 110 °C. Furthermore, the GCOAs are formulated as smart plugging fluids and the intelligent plugging evaluation method is established based on core flow test with continuous temperature control. The results indicate that the GCOAs can form effective plugging in both low- and median-permeability cores when temperature reaches above a switching point and the formed plugging can be partially removed after cooling, showing the temperature-switchable and self-adaptive plugging capacity as a consequence of reversible retention of GCOA aggregates and thermo-thickening behavior in pore-throat spaces. These features enable the implementation and removal of in-situ plugging in the specific temperature sections during drilling, and provide a new insight into the design of novel smart plugging materials with sustainable and recycling values.
研究领域:
材料科学
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石油工程
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Wenwen Shi,Dongqin Zhang,Luyao Han,Wanting Shao,Qimeng Liu,Bangyu Song,Guoqing Yan,Rupei Tang,Xuefeng Yang
Due to the features of high porosity, high water content, and tunable viscoelasticity , hydrogels have attracted numerous attentions in the promotion of wound closure. However, the lack of abilities to adapt the wounds of complex shapes and prevent postoperative adhesion limits their therapeutic outcomes in wound healing . To address the above challenges, the supramolecular chitin-based (SMCT) hydrogels are created via the host–guest pre-assembly strategy of β-cyclodextrin (βCD) and adamantane (Ad). The reversible host–guest crosslinks endow the SMCT hydrogels with highly dynamic networks, which can better accommodate irregularly shaped wounds compared with the covalent chitin-based hydrogels with similar mechanical properties. In addition, the SMCT hydrogels show rapid in vivo degradability (degradation time ≈ 2 days) due to the enzyme-triggered degradability of chitin , which do not need to be removed from the wounds after service and thus avoid the secondary damage to skin during dressing change. Owing to the hydrophobic cavity of βCD, the SMCT hydrogels can facilitate the load and release of curcumin with anti-inflammatory, antibacterial, and antioxidative activities, thereby significantly improving the wound healing efficiency. This work provides valuable guidance to the design of self-adaptive and fast-degradable hydrogels that hold great potential for enhancing the wound healing in skin and other tissues.
研究领域:
生物材料学
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医学
·
药剂学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Luyao Ding,Qianfen Qi,Susu Zhang,Chunguang Ren,Meihua Deng,Zengyu Sun,Renlong Zhang,Qun Liu,Sijin Duan,Xiuzhi Wang,Linlin Wang
Nowadays, hydrogels have been extensively and increasingly applied in the field of wound dressings in terms of their high biocompatibility and adjustable functionality. Bacterial infection can serious hinder wound healing the incomplete contact between hydrogel and wound increased the risk of infection. Thus, hydrogel wound dressings with antibacterial and can self-adapt to wound are urgently desired and still a challenge. Herein, a series of hydroxypropyl methylcellulose (HPMC) reinforced hydrogel wound dressings (CPH hydrogels) based on collagen/polyvinyl alcohol (COL/PVA) were designed and constructed, which with polyhexamethylene biguanide (PHMB) as antibacterial agent and borax as crosslinking agent. The dynamic cross-linking of reversible borate ester bond and hydrogen bonds endowed the CPH hydrogels with high adaptability and dynamic self-healing properties. The hydrogel exhibited good blood and cell biocompatibility, which with hemolysis rate lower than 5.0 % and cell survival rate higher than 90 %. The hydrogel also possessed excellent antibacterial ability for both E. coli and S. aureus by destroying the integrity of bacterial membrane. More importantly, the hydrogel with the formulation of 5 % COL, 5 %/PVA, 4 % borax and 1.75 % HPMC successfully achieved in promoting wound healing and accelerated collagen deposition, which provided a promising candidate to serve as wound dressing for wound healing.
研究领域:
生物材料学
·
医学
·
药剂学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Biomaterials Advances
·
2022
·
IF 0
Wenjie Zhang,Xiaoxue Wang,Juping Ma,Rong Yang,Yi Hu,Xiaoyan Tan,Bo Chi
The clinical acceleration of skin autogenous healing remains a great challenge, especially in the early stage after injury. In this work, a novel directly injectable hydrogel with high self-adaptability is designed as a provisional matrix to close the apposition of wound edges, using carboxymethyl cellulose and poly (γ-glutamic acid) through Schiff-base reaction. Benefiting from the dynamic covalent cross-linking structure, the functional biodegradable hydrogels are easy to prepare (gel time 5–180 s), demonstrating adequate mechanical strength (40–120 kPa), anti-fatigue abilities, and rapid self-healing (5–10 min at skin defect). Furthermore, the hydrogels exhibit biocompatibility and proliferation-promoting activity with murine fibroblasts. In the full-thickness dermal animal models, it significantly promoted collagen deposition, skin-function restoration, and VEGF expression. This hydrogel shows potential as a dressing available for skin regeneration during the healing of dermal injuries.
研究领域:
生物医学工程
·
组织工程
·
伤口愈合
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Chenxin Song,Shengyu Wang,Zheyuan Zhang,Kangren Kong,Kaiyu Liang,Yan He,Shuheng Zhang,Jie Pan,Zhe Gong,Jinjin Zhu,Ruikang Tang,Zhaoming Liu,Xiangqian Fang,Yueqi Zhao
Accidental trauma is always accompanied by tissue defects with noncompressible hemorrhages. Deformable and tough biomaterials are desirable for self-compressible hemostasis, although their preparation is challenging. Here, a critical-size calcium phosphate (C–CaP) with polymer-like high deformability and mineral-like high bending strength is prepared, which is hybridized with silk fibroin (SF) to fabricate a hemostatic sponge (SF-C). C–CaP endows SF-C with an ultrahigh elastic modulus (36.0 kPa) among analogous materials, leading to an ultrafast water absorption rate (1.2 g cm −3 s −1 ) and space-filling rate (200.0%/s). The deformability of the SF-C sponge further enables self-adaptability to defects with micrometre-scale precision. Consequently, SF-C achieves rapid hemostasis in both damaged soft tissues and hard tissues in rats, resulting in less blood loss and a shorter hemostatic time than those of clinical materials. This study provides a promising hemostatic material for the treatment of hemorrhages in defective tissues and expands the current knowledge by revealing the critical-sized ionic structure and unique mechanics of C–CaP.
研究领域:
生物材料
·
止血
·
组织工程
·
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）