Carbohydrate Polymers最新文献_第6页

Quaternized cellulose nanofiber aerogel with shape-memory for selective and rapid phosphate removal from water 具有形状记忆的四季铵化纤维素纳米纤维气凝胶，用于选择性和快速去除水中的磷酸盐

IF 12.5 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers

Pub Date : 2026-01-18 DOI: 10.1016/j.carbpol.2026.124961

Zhanghui Wang , Zhaodi Zheng , Peidong Xu , Qi Li , Hongzhi Liu

Adsorbent with highly selective, environmentally benign and easy-to-use virtues is ideal for scavenging phosphate from water. In this study, we have designed a novel shape-memory La(OH)₃-immobilized nanocellulose aerogel, quaternized cellulose nanofiber aerogel uniformly loaded with La(OH)₃ nanorods (La-Q). The combination of high-affinity La(OH)₃ and macroporous aerogel endowed the La-Q aerogel with ultrahigh adsorption rate constant of up to 0.0082 ± 0.0004 g mg⁻¹ min⁻¹, one to two orders of magnitude greater than that of the La(OH)₃ powders. The uniformly immobilized La(OH)₃ enabled a greatly enhanced La utilization efficiency, as evidenced by the higher amount of phosphorus adsorbed per gram of La (401.8 ± 5.3 mg P g(La)⁻¹) with regard to the La(OH)₃ powder (142.9 ± 1.8 mg P g(La)⁻¹). The La-Q aerogel exhibited a highly pH-dependent adsorption behavior, demonstrating stable adsorption capacity in neutral and weakly acidic phosphate solutions. The presence of typical anionic species including SO₄²⁻, Cl⁻, HCO₃⁻, and NO₃⁻ did not significantly affect its adsorption capacity for phosphate, indicating interference-resistant adsorption ability due to the strong affinity. The formation of LaPO₄ complexes, as supported by XPS and XRD results, was responsible for the exceptional adsorption affinity. The good shape-recovery ability rendered easy reusability to the La-Q aerogel, which retained almost 80.2% of the original adsorption capacity after three cycles.

吸附剂具有高选择性，环保和易于使用的优点，是清除水中磷酸盐的理想选择。在本研究中，我们设计了一种新型的形状记忆La(OH)3-固定化纳米纤维素气凝胶，即均匀负载La(OH)3纳米棒（La- q）的季铵化纤维素纳米纤维气凝胶。高亲和性的La(OH)3与大孔气凝胶的结合使La- q气凝胶具有超高的吸附速率常数，可达0.0082±0.0004 g mg−1 min−1，比La(OH)3粉末的吸附速率常数高出一到两个数量级。均匀固定的La(OH)3可大大提高对La的利用效率，每克La吸附的磷量（401.8±5.3 mg P g(La)−1）高于La(OH)3粉末（142.9±1.8 mg P g(La)−1）。La-Q气凝胶表现出高度依赖ph的吸附行为，在中性和弱酸性磷酸盐溶液中表现出稳定的吸附能力。SO42−、Cl−、HCO3−和NO3−等典型阴离子的存在对其对磷酸盐的吸附能力没有显著影响，表明其具有较强的亲和力，具有抗干扰的吸附能力。XPS和XRD结果表明，LaPO4配合物的形成是其具有优异吸附亲和力的原因。良好的形状恢复能力使La-Q气凝胶易于重复使用，经过三次循环后，其吸附容量保持在原来的80.2%左右。

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引用次数: 0

Thermally superinsulating nanofibrous xanthan gum aerogels 热超绝缘纳米纤维黄原胶气凝胶

IF 12.5 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers

Pub Date : 2026-01-18 DOI: 10.1016/j.carbpol.2026.124962

Wenxiao Liu , Yuxun Zhou , Di Liu , Jinbin Wang , Zhifang Sun

Polysaccharide-based aerogels combine high porosity, low density, excellent biocompatibility, and tunable functionality, making them attractive for a wide range of applications. In this study, xanthan gum (XG) was used to fabricate nanoporous aerogels with finely structured nanofibers via metal-ion crosslinking, followed by solvent exchange and supercritical CO₂ drying. The resulting XG aerogels exhibit a high specific surface area (391 m²·g⁻¹), ultra-high porosity (98.7%), and low density (0.059 g·cm⁻³), achieving an ultra-low thermal conductivity of 17.0 mW·m⁻¹·K⁻¹. The robust crosslinked network also provides excellent mechanical performance, with a compressive modulus of 2.75 MPa. Hydrophobic treatment enables it to adapt to a wider range of environmental conditions. These features make XG aerogels promising high-performance thermal insulation materials for applications in energy conservation and environmental protection.

基于多糖的气凝胶结合了高孔隙率、低密度、优异的生物相容性和可调节的功能，使它们具有广泛的应用吸引力。本研究以黄原胶（XG）为原料，通过金属离子交联法制备结构精细的纳米纤维纳米多孔气凝胶，然后进行溶剂交换和超临界CO2干燥。所得的XG气凝胶具有高比表面积（391 m2·g−1）、超高孔隙率（98.7%）、低密度（0.059 g·cm−3）、超低导热系数（17.0 mW·m−1·K−1）等特点。坚固的交联网络还提供了优异的机械性能，压缩模量为2.75 MPa。疏水处理使其能够适应更广泛的环境条件。这些特点使XG气凝胶在节能环保方面具有良好的应用前景。

引用次数: 0

Substitution-degree-engineered acetylated curdlan Janus dressing: Unidirectional self-pumping for efficient wound exudate management and accelerated healing 替代度工程乙酰化curdlan Janus敷料：单向自泵，有效的伤口渗出管理和加速愈合

IF 12.5 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers

Pub Date : 2026-01-18 DOI: 10.1016/j.carbpol.2026.124944

Shaojing Yang , Shixiong Yang , Yixuan Cai , Jia Zou , Xichen Qiao , Rui Wang , Huajun Wang , Xiaofei Zheng , Hairong Xiong , Zongbao Zhou

Chronic wound management requires advanced strategies that integrate exudate control and tissue regeneration. In this study, we engineered a bilayered Janus dressing via electrospinning using strategically acetylated curdlan with tailored degrees of substitution. The dressing consisted of a hydrophobic inner layer (a low-substitution acetylated curdlan) and a hydrophilic outer layer (a high-substitution acetylated curdlan), which synergistically enabled unidirectional fluid transport: rapid exudate absorption (<3 s) through the hydrophilic layer and effective backflow prevention by the hydrophobic layer. This Janus material demonstrated a high swelling capacity (>400%) under physiological conditions, along with suitable mechanical properties (wet-state tensile strength: 5.7 MPa, elongation at break: 55%), ensuring structural integrity during dynamic wound healing processes. In vitro assessments confirmed excellent biocompatibility with no cytotoxicity toward NIH-3T3 fibroblasts or human umbilical vein endothelial cells. In a full-thickness rat wound model, the bilayer dressing significantly accelerated wound closure and enhanced collagen deposition compared with other membrane-treated groups. Immunofluorescence staining revealed a five-fold increase in CD31⁺ vessel density and a significant reduction in CD68⁺ macrophage infiltration by day 14. By combining unidirectional exudate management, mechanical robustness, and immunomodulation, this substitution-degree-engineered polysaccharide-based Janus dressing represents a multifunctional and clinically promising platform for the management of refractory wounds.

慢性伤口管理需要先进的策略，包括分泌物控制和组织再生。在这项研究中，我们通过静电纺丝设计了一种双层Janus敷料，使用了具有定制取代度的乙酰化凝乳。敷料由疏水的内层（低取代度乙酰化凝血酶）和亲水的外层（高取代度乙酰化凝血酶）组成，它们协同作用实现了流体的单向输送：通过亲水性层快速吸收渗出液（<3 s），疏水性层有效防止回流。这种Janus材料在生理条件下具有很高的膨胀能力（>400%），以及合适的机械性能（湿态抗拉强度：5.7 MPa，断裂伸长率：55%），确保了动态伤口愈合过程中的结构完整性。体外评估证实其具有良好的生物相容性，对NIH-3T3成纤维细胞或人脐静脉内皮细胞无细胞毒性。在全层大鼠伤口模型中，与其他膜处理组相比，双层敷料显著加速了伤口愈合，增强了胶原沉积。免疫荧光染色显示第14天CD31+血管密度增加5倍，CD68+巨噬细胞浸润明显减少。通过将单向渗出液管理、机械稳健性和免疫调节相结合，这种取代度工程设计的多糖基Janus敷料代表了一种多功能和临床前景良好的治疗难治性伤口的平台。

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引用次数: 0

Synergistic inspiration of in situ growth technology and biomass phytic acid for designing durable flame retardant and antibacterial cellulose fibers 原位生长技术与生物质植酸对设计耐用阻燃抗菌纤维素纤维的协同启示

IF 12.5 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers

Pub Date : 2026-01-18 DOI: 10.1016/j.carbpol.2026.124955

Yin Tian , Wei Tan , Lu Bai , Lei Tan , Ying Chang , Guixiang Song , Ping Li , Yuanlin Ren , Xiaohui Liu

Cellulose is an important natural carbohydrate polymer, and natural or regenerated cellulose fibers are widely used in many fields, but the flammability of cellulose fibers limits their further development. To address the issue, an in situ growth of P and N flame retardant chelates (IGPN) was employed in a LiCl/N, N-dimethylacetamide (DMAc) solvent system to produce flame retardant cellulose fibers (Cellulose-IGPN@Li). X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR) proved the successful synthesis of Li-containing IGPN (IGPN@Li) as well as the effective introduction of IGPN@Li into the fibers. The limiting oxygen index (LOI) value of Cellulose-IGPN@Li achieved 29.6% and remained at 28.7% even after 30 laundering cycles (LCs). In addition, the peak heat release rate (PHRR) and total heat release (THR) were reduced by 65% and 41%, respectively. Thermogravimetric-infrared (TG-IR) and cone calorimetry (CC) tests confirmed that IGPN@Li played an important role in the gas and condensed phases. Moreover, Cellulose-IGPN@Li had good antibacterial properties and moisture-dependent conductivity. This work provides a novel production method of durable flame retardant cellulose fibers with integrated potential greenness and economy.

纤维素是一种重要的天然碳水化合物聚合物，天然或再生纤维素纤维被广泛应用于许多领域，但纤维素纤维的易燃性限制了其进一步发展。为了解决这个问题，在LiCl/N， N-二甲基乙酰胺（DMAc）溶剂体系中原位生长P和N阻燃螯合物（IGPN）来生产阻燃纤维素纤维（Cellulose-IGPN@Li）。x射线光电子能谱（XPS）和傅里叶变换红外光谱（FTIR）证实了含锂IGPN （IGPN@Li）的成功合成以及IGPN@Li的有效引入。Cellulose-IGPN@Li的极限氧指数（LOI）达到29.6%，30次洗涤循环后仍保持在28.7%。峰值放热率（PHRR）和总放热率（THR）分别降低了65%和41%。热重-红外（TG-IR）和锥量热（CC）测试证实IGPN@Li在气相和凝聚相中起重要作用。此外，Cellulose-IGPN@Li具有良好的抗菌性能和水分依赖性电导率。本工作提供了一种新型的绿色经济耐用阻燃纤维素纤维的生产方法。

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引用次数: 0

Thermo-irreversible konjac glucomannan gels: Preparation, mechanism, and applications 热不可逆魔芋葡甘露聚糖凝胶：制备、机理及应用

IF 12.5 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers

Pub Date : 2026-01-17 DOI: 10.1016/j.carbpol.2026.124953

Li Sun , Pengkui Xia , Ding An , Mahmoud Youssef , Jing Li , Bin Li

The unique gelling properties of konjac glucomannan (KGM) have been utilized to produce a variety of gel products. However, KGM gels obtained from the existing preparation methods have several problems including sensory deterioration, instability during processing, and poor mechanical properties (especially insufficient gel strength), which make it difficult to meet the demand. The formation and number of cross-linking points are critical for the construction of the gel network and affect the mechanical properties of the gel. Based on this, an in-depth understanding of the formation process and related mechanisms is important for the quality improvement of KGM gel products. The present review discussion aims to elucidate the formation and related mechanisms of KGM gels, focusing on the alkali-induced thermo-irreversible KGM gels firstly. Then, this work systematically studies the development of alkali-induced thermo-irreversible gels in homogeneous and heterogeneous systems, from the swelling of KGM to the formation of gel network cross-linking points to the establishment of the gel network. Furthermore, it offers a review of post-gelation methods utilized to improve the mechanical properties of KGM gels. Finally, the potential applications of KGM gels are discussed. This study aims to advance innovation in polysaccharide-based gels creation.

魔芋葡甘露聚糖（KGM）独特的胶凝特性已被用于生产各种凝胶制品。然而，现有制备方法得到的KGM凝胶存在感官变质、加工过程不稳定、力学性能差（尤其是凝胶强度不足）等问题，难以满足需求。交联点的形成和数量对凝胶网络的构建至关重要，并影响凝胶的力学性能。在此基础上，深入了解KGM凝胶产物的形成过程及其机理对提高KGM凝胶产品的质量具有重要意义。本文综述了KGM凝胶的形成及相关机理，重点介绍了碱诱导的热不可逆KGM凝胶。然后，系统地研究了碱诱导热不可逆凝胶在均相和非均相体系中的发展，从KGM的溶胀到凝胶网络交联点的形成再到凝胶网络的建立。此外，它还提供了用于改善KGM凝胶力学性能的凝胶后方法的综述。最后，对KGM凝胶的应用前景进行了展望。本研究旨在推进多糖基凝胶制备的创新。

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引用次数: 0

Neutral and natural xylose-based deep eutectic solvents facilitating efficient modification-free production of pristine-state bamboo holocellulose nanofibrils 中性和天然木糖基深共晶溶剂促进了原始状态竹全息纤维素纳米原纤维的高效无改性生产

IF 12.5 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers

Pub Date : 2026-01-17 DOI: 10.1016/j.carbpol.2026.124957

Xiaochen Jin , Junpeng Liu , Hanqi Dong , Xuan Xu , Arthur J. Ragauskas , Qiang Yong , Chen Huang , Zhe Ling

Holocellulose nanofibrils (HCNFs), a group of novel bio-based nanomaterials containing hemicellulosic polysaccharides, have exhibited inherent sustainability, biodegradability, and superior mechanical properties compared to cellulose nanofibrils, demonstrating significant potential for applications in advanced materials. However, conventional HCNFs production often causes serious degradation of hemicelluloses, inevitably surface modification of raw cellulose and solvent pollution, etc. Herein, neutral and natural deep eutectic solvents (NADESs) combined with choline chloride (ChCl) and xylose (Xyl) are firstly proposed for preparation of bamboo HCNFs, which result in high hemicellulose content of ~19%, cellulose degree of polymerization (DP) preservation of 95%, and the well preservation of surface hydroxyl groups of pristine holocellulose in bamboo cell wall. The NADESs treatment-induced HCNFs displayed the highest aspect ratio of ~115, indicating robust protection of its molecular integrity. Tough films of HCNFs with good transparency (60%–80%), high tensile stress (122.34 MPa) and toughness (44.13 MJ/m³) were facilely prepared. Molecular simulation analysis was carried out for the mechanisms on bamboo holocellulose nanofibrillation, proving notable weakening of the intermolecular hydrogen bonds interactions by the NADES. Cellulose chains exhibit a stronger preference for forming hydrogen-bonding interactions with Xyl than with ChCl. The hydrogen bond density between cellulose chains and xylose is significantly higher, 2.8 times that of which between cellulose chains and ChCl. suggesting the excellent capability of ChCl: Xyl DES to dissociate cellulose microfibrils while retaining hemicellulose components. Thus, this study deepens the understanding of novel DES treatment on lignocellulosic biomass and broadens the scope of universal utilization of plant polysaccharides.

全新纤维素纳米原纤维（HCNFs）是一类含有半纤维素多糖的新型生物基纳米材料，与纤维素纳米原纤维相比，具有固有的可持续性、可生物降解性和优越的机械性能，在先进材料中具有巨大的应用潜力。然而，传统的HCNFs生产往往会造成半纤维素的严重降解，不可避免地会造成原料纤维素的表面改性和溶剂污染等问题。本文首次提出用中性和天然的深共晶溶剂（NADESs）与氯化胆碱（ChCl）和木糖（Xyl）结合制备竹质纤维素纤维，得到了高半纤维素含量（~19%）、纤维素聚合度（DP）保存率（95%）、原始纤维素表面羟基在竹细胞壁中保存良好的竹质纤维素纤维。NADESs处理诱导的HCNFs显示出最高的长径比~115，表明其分子完整性得到了强有力的保护。制备了具有良好透明度（60% ~ 80%）、高拉伸应力（122.34 MPa）和高韧性（44.13 MJ/m3）的HCNFs坚韧膜。分子模拟分析了竹全息纤维素纳米纤颤的机理，发现NADES显著削弱了分子间氢键相互作用。纤维素链更倾向于与羟基形成氢键相互作用，而不是与ChCl形成氢键相互作用。纤维素链与木糖之间的氢键密度显著升高，是纤维素链与ChCl之间氢键密度的2.8倍。这表明ChCl: Xyl DES具有分离纤维素微原纤维同时保留半纤维素成分的优异能力。因此，本研究加深了对新型DES处理木质纤维素生物质的认识，拓宽了植物多糖普遍利用的范围。

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引用次数: 0

Calcium-mediated modulation of ultra-low-ester pectin-gluten interactions: subunit-level mechanisms revealed using HMW-GS deletion lines and molecular dynamics simulations 钙介导的超低酯果胶-谷蛋白相互作用的调节：利用HMW-GS缺失线和分子动力学模拟揭示了亚单位水平的机制

IF 12.5 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers

Pub Date : 2026-01-17 DOI: 10.1016/j.carbpol.2026.124952

Rong-ran Zhang , Ping-ping Zhang , Tian Lv , Bo Wang , Zhe Liu , Yue Zhang , Chuan Zhong , Pei Wang , Qin Zhou , Dong Jiang , Hao Jiang , Tao Yang

Interactions between dietary fibers and gluten critically define the structural integrity and textural performance of wheat-based foods. This study elucidates how calcium ions (Ca²⁺) orchestrate the molecular interplay between low-ester pectin (LEP, 13.5% DE) and high-molecular-weight glutenin subunits (HMW-GSs) at the Glu-D1 locus (Dx2 and Dy12). Through an integrated approach combining multi-scale experimental analyses (SE-HPLC, RP-HPLC, FTIR, Raman spectroscopy, CLSM, and rheology) with all-atom molecular dynamics simulations, we demonstrate that LEP alone disrupts disulfide cross-linking, β-sheet order, and hydrophobic packing within gluten networks, while Ca²⁺ reverses these perturbations by forming “egg-box” ionic bridges between LEP carboxyl groups and acidic residues on HMW-GSs. The extent of this structural recovery was highly subunit-dependent: Dx2 displayed superior structural compactness, stronger Ca²⁺ coordination, and greater electrostatic stabilization than y-type Dy12, which remained more flexible and less responsive. Consequently, Dx2 functions as the primary structural anchor enabling Ca²⁺-mediated recovery of polymerization, hydrogen bonding, and viscoelastic elasticity. These findings reveal that Dx2 impart reversible conformational resilience under Ca²⁺-regulated pectin coupling, providing a mechanistic framework for optimizing LEP fortification and informing subunit-oriented wheat breeding strategies to achieve nutritionally enhanced yet structurally stable fiber-enriched products.

膳食纤维和面筋之间的相互作用决定了小麦食品的结构完整性和质地性能。本研究阐明了钙离子（Ca2+）如何协调低酯果胶（LEP, 13.5% DE）和高分子量谷蛋白亚基（HMW-GSs）在Glu-D1位点（Dx2和Dy12）之间的分子相互作用。通过将多尺度实验分析（SE-HPLC, RP-HPLC， FTIR，拉曼光谱，CLSM和流变学）与全原子分子动力学模拟相结合的综合方法，我们证明了LEP本身破坏了面筋网络中的二硫交联，β-片序和疏水堆积，而Ca2+通过在LEP羧基和hw - gss上的酸性残基之间形成“蛋盒”离子桥来逆转这些扰动。这种结构恢复的程度高度依赖于亚基：与y型Dy12相比，Dx2具有优越的结构紧凑性、更强的Ca2+配位和更大的静电稳定性，而y型Dy12具有更大的灵活性和更低的响应性。因此，Dx2作为Ca2+介导的聚合、氢键和粘弹性恢复的主要结构锚。这些发现表明，Dx2在Ca2+调控的果胶偶联下具有可逆的构象弹性，为优化LEP强化和亚单位导向的小麦育种策略提供了机制框架，以获得营养增强但结构稳定的富含纤维的产品。

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引用次数: 0

Bioinspired bioactive bilayer membrane: A biodegradable adhesive membrane integrating hemostasis, antibacterial, and anti-adhesion functions for visceral repair 生物活性双层膜：一种可生物降解的粘附膜，具有止血、抗菌和抗粘附功能，用于内脏修复

IF 12.5 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers

Pub Date : 2026-01-17 DOI: 10.1016/j.carbpol.2026.124950

Xiaokang Zhang , Shaojing Jiang , Gong Ma , Huijiao Tang , Jing Ma , Yunheng Liu , Longqing Si , Shihao Zhang , Yan Yu , Yuhao Liu , Xiao Jiang , Xiangzhan Jiang , Jing Chen , Jinghui Hu

Current soft tissue repair membranes have insufficient wet adhesion, postoperative adhesion risk, and limited therapeutic functionality. Therefore, we adopted a multiscale biomimetic design using mussel adhesion chemistry and the interfacial robustness of 3,4,5-trihydroxyphenylalanine (TOPA) in the tunicate epidermis to construct a biodegradable bilayer hydrogel membrane (PLCL-CSs@PADT). This design enables interfacial water displacement, robust tissue adhesion (21 kPa strength, 110 J m⁻² fracture energy), antibacterial hemostasis (>80%), and a topological hydrophobic barrier for adhesion prevention. Methacrylated gelatin is introduced as a photocurable interfacial bridging phase, achieving seamless mechanical continuity, while gradient cyclic elution eliminates residual monomers. The membrane rapidly achieved hemostasis in rat hepatic hemorrhage models (<20 s) and reduced blood loss by 83%. In postoperative abdominal adhesion models, the material completely prevented adhesion formation, attributed to the combined shielding effect of the outer layer and regulation of t-PA/PAI-1 expression. In vitro experiments demonstrated that the membrane exhibits a preliminary trend of controlled biodegradation over an 8-week period, aligning with typical soft-tissue healing timelines. This work establishes a multifunctional, bioinspired platform that combines instant tissue sealing, infectious risk mitigation, and sustained anti-adhesion performance and contributes to the development of next-generation intelligent bioactive membranes for complex soft-tissue repair.

目前的软组织修复膜湿性粘连不足，术后粘连风险大，治疗功能有限。因此，我们采用了多尺度仿生设计，利用贻贝粘附化学和被膜表皮中3,4,5-三羟基苯丙氨酸（TOPA）的界面鲁棒性构建了可生物降解的双层水凝胶膜（PLCL-CSs@PADT）。该设计实现了界面水位移、强大的组织粘附（21 kPa强度，110 J m−2断裂能）、抗菌止血（>80%）和防止粘附的拓扑疏水屏障。甲基丙烯酸明胶被引入作为光固化的界面桥接相，实现无缝的机械连续性，而梯度循环洗脱消除残留的单体。该膜在大鼠肝出血模型中迅速止血（20 s），减少出血量83%。在术后腹部粘连模型中，由于外层的屏蔽作用和调节t-PA/PAI-1的表达，该材料完全阻止了粘连的形成。体外实验表明，该膜在8周的时间内呈现出可控生物降解的初步趋势，与典型的软组织愈合时间线一致。这项工作建立了一个多功能的、受生物启发的平台，结合了即时组织密封、降低感染风险和持续抗粘附性能，有助于开发用于复杂软组织修复的下一代智能生物活性膜。

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引用次数: 0

Resveratrol-liposomes loaded polyvinyl alcohol-chitosan fiber scaffolds mediate bone regeneration via autophagy: synergizing angiogenesis and immunomodulation 白藜芦醇脂质体负载聚乙烯醇壳聚糖纤维支架通过自噬介导骨再生：协同血管生成和免疫调节

IF 12.5 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers

Pub Date : 2026-01-16 DOI: 10.1016/j.carbpol.2026.124945

Tingting Ma , Yiran Li , Aolong Li , Siluo Dai , Zhengyang Qin , Yubao Li , Jidong Li

The core difficulty in bone defect repair lies in the simultaneous regulation of immunity, angiogenesis and osteogenesis. In this study, hydrophobic resveratrol (Res) was encapsulated in liposomes (LP), and then co-spun with polyvinyl alcohol-chitosan (PVA-CS) to construct a “drug-liposome-fiber” multi-level drug-controlled-release scaffold (RL/PVA-CS). Physicochemical characterization confirmed that this scaffold could sustain the release of Res, and CS incorporation significantly enhanced mechanical properties of the PVA-based fiber scaffold. In vitro studies confirmed that the RL/PVA-CS scaffold not only efficiently scavenged free radicals, regulated macrophage polarization to M2 type to improve the immune microenvironment, but also demonstrated a significant potential for promoting angiogenesis. Moreover, this scaffold could effectively recruit bone marrow mesenchymal stem cells (BMSCs) and drove their osteogenic differentiation and matrix mineralization by activating the autophagy pathway. In a rat cranial defect model, the implantation of the RL/PVA-CS scaffold demonstrated excellent angiogenic ability and osteogenic performance, significantly accelerating bone defect repair. The main innovation of this study is the development of a dual-release and multi-functional synergistic RL/PVA-CS fiber scaffold. This system effectively protects drug activity, overcomes single-function limits of traditional materials, coordinates immunity, angiogenesis and osteogenesis via autophagy, offering an integrated solution for complex bone defects.

骨缺损修复的核心难点在于免疫、血管生成和成骨同时调控。本研究将疏水性白藜芦醇（Res）包裹在脂质体（LP）中，与聚乙烯醇-壳聚糖（PVA-CS）共纺，构建“药物-脂质体-纤维”多级药物控释支架（RL/PVA-CS）。理化表征证实该支架能够维持Res的释放，CS的掺入显著增强了pva基纤维支架的力学性能。体外研究证实，RL/PVA-CS支架不仅能有效清除自由基，调节巨噬细胞向M2型极化，改善免疫微环境，而且具有促进血管生成的显著潜力。此外，该支架可以有效募集骨髓间充质干细胞（BMSCs），并通过激活自噬途径驱动其成骨分化和基质矿化。在大鼠颅骨缺损模型中，RL/PVA-CS支架植入表现出良好的血管生成能力和成骨性能，显著促进骨缺损修复。本研究的主要创新是开发了一种双释放多功能协同RL/PVA-CS纤维支架。该系统有效地保护了药物活性，克服了传统材料单一功能的限制，通过自噬协调免疫、血管生成和成骨，为复杂骨缺损提供了综合解决方案。

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引用次数: 0

Intra-phase reinforcement of chitin nanocrystals in bicontinuous bigels: a strategy for high-precision 3D food printing 双连续凝胶中几丁质纳米晶体的相内增强：高精度3D食品打印的一种策略

IF 12.5 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers

Pub Date : 2026-01-16 DOI: 10.1016/j.carbpol.2026.124948

Erpeng Chao , Qun Yu , Jieying Li , Liuping Fan , Yulin Zhou

This study introduced an intra-phase reinforcement strategy utilizing chitin nanocrystals (ChNCs) to enhance the structural stability and 3D printability of bicontinuous bigels (BCBG). Varying ChNCs concentrations significantly influenced the gel network, rheological behavior, textural attributes, and oil/water distribution, thereby influencing their performance as edible inks for 3D food printing. Notably, the 1% ChNCs-BCBG exhibited the highest creep recovery rate (60.15 ± 0.08%), maximum thixotropic recovery rate (69.63 ± 0.06%), longest delay time (λ_ret = 13.42 ± 0.43 s), greatest cohesiveness (1.53 ± 0.14). Additionally, it significantly improved water retention, as evidenced by a reduction in the T₂₃ relaxation time from 938.49 ms (0% ChNCs) to 335.94 ms (1% ChNCs). These improvements induced superior printing performance, reducing deformation rates to 1.34 ± 0.14% for the starfish model and 2.16 ± 0.13% for the Superman model. Correlation analysis further confirmed strong relationships between rheological and textural properties, water/oil distribution, and 3D printing precision. This study underscores the potential of ChNCs-reinforced BCBG in 3D food printing.

本研究介绍了一种利用几丁质纳米晶体（ChNCs）增强双连续bigels （BCBG）结构稳定性和3D打印性能的相内增强策略。不同的chnc浓度会显著影响凝胶网络、流变行为、质地属性和油水分布，从而影响其作为3D食品打印食用油墨的性能。其中，1% chnc - bcbg的蠕变回收率最高（60.15±0.08%），触变回收率最高（69.63±0.06%），延迟时间最长（λret = 13.42±0.43 s），黏结性最高（1.53±0.14）。此外，它显著地改善了水潴留，证明了T₂₃放松时间从938.49 ms （0% chnc）减少到335.94 ms （1% chnc）。这些改进带来了卓越的打印性能，将海星模型的变形率降低到1.34±0.14%，超人模型的变形率降低到2.16±0.13%。相关分析进一步证实了流变和纹理特性、水/油分布与3D打印精度之间的密切关系。这项研究强调了cncs增强BCBG在3D食品打印中的潜力。

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