ACS Applied Polymer Materials
·
2025
·
IF 4.7
Xinmeng Zhang,Xunwei Wang,Peizhong Feng
Topical fluoride administration has been widely recognized as an effective strategy for caries prevention. Hydrogels, owing to their unique hydrated networks and tunable physicochemical properties, have emerged as promising candidates for localized fluoride delivery. However, the controlled sustained release of fluoride ions (F–) from hydrogels in moist environments continues to present significant technical challenges. In this study, we constructed a fluoride-loaded hydrogel system through a copolymerization strategy of chitosan (CS), acrylic acid (AA), and acrylamide (AM). The mesh size of the hydrogel was significantly reduced by the synergistic cross-linking effect of the hydrogen bond network and Zr4+-carboxyl coordination, thereby achieving the sustained release performance of F–. Benefiting from the ion cross-linking sites provided by hydrated zirconium ions and the hydrogen bond interactions, the hydrogel shows remarkable property enhancements: tensile stress increases by 159% (from 0.37 to 0.96 MPa) while swelling ratio decreases by 97.4% (from 4600 to <120%). The in vitro release experiment results showed that the cumulative release rate at 24 h decreased from 90 to 24%, effectively avoiding the initial burst release phenomenon and significantly prolonging the release time. The release mechanism was further investigated by fitting the in vitro release data to the zero-order model, the first-order model, and the Korsmeyer–Peppas model. The kinetic model fitting results indicated that the Peppas model had the best fitting effect, with a correlation coefficient (R2) of 0.9875 and a diffusion exponent n = 0.4060, suggesting that it conformed to the Fickian diffusion mechanism.
研究领域:
材料科学
·
口腔医学
·
药剂学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 25
·10648-10653
·
IF 3.288
Yan Yuan,Zhengqian Li,Hai Lu,Hao Cheng,Dongdong Zheng,Zhao Fang
A unique hybrid binder system based on polyacrylic acid (PAA) and polyacrylamide (PAM) was designed for lithium–sulfur batteries. It is found that the hydrophilic PAM possesses suitable swelling properties and favorable interface reaction kinetics. Moreover, the strong chemical adsorption and hydrogen bond interaction of polar functional groups mainly from PAA confine the out-diffusion of polysulfides and decrease byproduct deposition on the electrode. Electrochemical test results demonstrate that sulfur cathodes equipped with the PAM–PAA binder possess higher reversible capacity, lower charge transfer resistance, and better cycle and rate performances in contrast to conventional PVDF cathodes.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
MACROMOLECULES
·
2021
·
IF 5.985
Hanqing Jiang,Shengda Wang,Yanhui Wang,Yaxian Wang,Liang Li,Li Ma,Dongmei Cui,Tao Tang
A new strategy to access long-subchain hyperbranched polypropylene (LHB-PP) has been established, starting from the thermally degraded polypropylene (PP) possessing two-terminal vinylidene double bonds of isopropenyl end groups (PP-TVD). PP-TVD reacts with hydrogen bromide (HBr) with high efficiency, followed by a substitution reaction with sodium azide to yield azide-terminated PP (PP-N3). Finally, the highly efficient click reaction between PP-N3 and 1,3,5-triethynylbenzene (TEB) affords the unprecedented LHB-PP, of which the molecular weight and topologic microstructure are well controlled by tuning the (PP-N3)-to-TEB molar ratios. Compared to the linear PP with a similar molecular weight, the solution of this newly obtained LHB-PP has a lower intrinsic viscosity and a smaller hydrodynamic radius. Simultaneously, the LHB-PP melt presents a higher zero shear viscosity and a more apparent shear-thinning phenomenon. For solid properties, there are γ crystalline components in the LHB-PP, and the lamellar thickness of LHB-PP is much smaller than that of linear PP. This work paves a new avenue for upgrading the recycled PP to new products with hyperbranched topology and improved properties.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2020
·Vol. 27
·期 6
·1-9
·
IF 2.426
Deng Yaling,Sun Jianjun,Ni Xingya,Yu Bo
Natural joints have the hierarchical structure of bone and cartilage, providing excellent lubrication and load-carrying capacity. In our research, the hierarchical structure artificial joints of Poly Acrylic Acid (PAA)- Poly Acrylamide (PAAm) hydrogel coating and Ti6Al4V substrate were formed using a simple yet versatile method by mimicking the hierarchical structure of natural joints. The efficient lubrication at friction interfaces was achieved. The composition and microstructure were confirmed by Fourier-transform infrared (FTIR), X-ray photoelectron spectroscopy (XPS), Scanning electron microscopy (SEM). The hydrogel coatings were successfully prepared on the surface of Ti6Al4V substrate through the adsorption of the charged group. This hierarchical structure material exhibits the lower dynamic friction, approximately 0.085, which is much lower than bare Ti6Al4V, about 0.429. The wear on the surfaces after the tribological experiment is super-shallow and has no significant fracture area around the scratch. The PAA-PAAm hydrogel has a more uniform and compact cross-linked network porous structure, and the porous size is much smaller than PAA hydrogel. The cross-linked network porous structure is the main factor accounting for the low dynamic friction. This hierarchical structure of soft and hard improve the load-carrying ability and has the potential uses in artificial joints.
研究领域:
生物材料学
·
摩擦学
·
医学工程
✓ 已验证
DOI
高影响因子
MATERIALS LETTERS
·
2020
·
IF 3.204
Jidong Dai,Min Liang,Pengfei Ren,Yifu Fu,Faming Wang,Xin Ge,Tianzhu Zhang
In this work, polyacrylamide/polydopamine (PAM/PDA) composite coating with porous structure is proposed for the polypropylene (PP) surface modification. Polymerization induced phase separation (PIPS) method cooperated with mussel-inspired dopamine (DA) is all applied in this process. With the assistance of the DA, PAM coatings can firmly adhere to the PP surfaces. After adding dopamine, the Young’s modulus of the PAM/PDA coating is decreased by two-thirds and the elastic modulus increased more than doubled.
研究领域:
高分子材料科学
·
生物材料
·
表面工程
·
纳米技术
·
功能涂层
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2013
·
IF 4.093
Xiao-Na Chen,Ling-Shu Wan,Qing-Yun Wu,Suo-Hong Zhi,Zhi-Kang Xu
In this work, we employed CaCO 3 mineralization to greatly improve the water flux and dye rejection of polyacrylonitrile-based (PAN) ultrafiltration membranes. PAN-based membranes were prepared with 1.0–5.0 wt% of poly(acrylic acid) (PAA) as a matrix for mineralization. These membranes were subsequently mineralized with CaCO 3 by an alternate soaking process (ASP). The optimized mineralization condition was 10 cycles of ASP with 100 mM CaCl 2 and Na 2 CO 3 solutions. The resulted membranes were characterized with field emission scanning electron microscopy , X-ray diffraction, and energy dispersion X-ray analysis combined with elemental distribution mapping. The mineralized CaCO 3 particles were found to be deposited throughout the membranes. Results also indicated that the pure water flux of PAN-based membranes decreased with PAA if the content was larger than 1.0 wt%, which was due to the stretching of PAA chains deriving from the electrostatic repulsion of COO − groups. In contrast, the mineralized membranes showed a dramatic increase of water flux owing to the chain collapse of PAA caused by the formation of complexes with Ca 2+ in the mineralization of CaCO 3 as well as the enhanced hydrophilicity by CaCO 3 . The mineralized membranes even showed a high rejection of Congo red, which makes them potential in nanofiltration for dye-polluted wastewater.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2025
·
IF 3.2
Haohao Hou,Yu Xue,Meng Zhang,Xin He,Hongfu Zhou,Liyang Zhang
Polypropylene homopolymer (PPH) is a highly practical and widely utilized thermoplastic polymer that finds extensive applications in automotive components, piping systems, and constructed materials. Although PPH has merits such as low cost, versatility, and exceptional corrosion resistance, its low toughness limits application in specialized engineering sectors such as high-pressure piping, aerospace components, and cryogenic environments. In this paper, the toughness of PPH was improved by blending with polypropylene block copolymer (PPB) and β nucleating agent (NP-328). The room temperature impact strength of PPH containing 30% PPB and 0.2% NP-328 was increased by 4.4 times, and its low-temperature elongation at break was improved by 87%, compared to those of the pure PPH sample. Furthermore, this paper investigated the crystallization behaviors of PPH/PPB(70/30) with varying amounts of NP-328, using crystallization kinetics studies for analysis. The crystallization rate of PPH/PPB (70/30) systems gradually adding the amounts of NP-328 improved significantly. At 140°C, the half-crystallization time of the PPH/PPB (70/30) containing 0.2% NP-328 decreased by 14.5 min compared with that of PPH/PPB (70/30) without NP-328. The high-toughness PPH material developed in this work exhibits significant potential for application across a variety of industries, including automotive manufacturing, home appliance production, and packaging sector, among others. Highlights IS of polypropylene homopolymer (PPH) increased from 19.1 to 103.2 kJ/m2. Crystallinity of β in PPH/polypropylene block copolymer (PPB) growed to 26.8%. Low temperature toughness of PPH increased by about two times. The t1/2 of 70PPH/30PPB/0.2β was 14.5 min shorter than 70PPH/30PPB at 140 °C.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
Research
·
2019
·
IF 0
Yukun Jian,Baoyi Wu,Xiaoxia Le,Yun Liang,Yuchong Zhang,Dachuan Zhang,Ling Zhang,Wei Lu,Jiawei Zhang,Tao Chen
Inspired by the freezing tolerance performances found in living creatures, an effect approach is presented to develop novel antifreezing polymeric organohydrogel actuators. Through construction of a bilayer hydrogel including a nonresponsive polyacrylamide (PAAm) layer and a pH-responsive polyacrylic acid (PAA) layer in the presence of a mixed solvent of water and glycerol, organohydrogel actuators that could produce various shape deformations at subzero temperatures have been achieved, and the actuating speed could be tuned by adjusting the temperature and the ratio between glycerol and water. Moreover, a series of application demonstrations including a weightlifting robot, artificial valve, and robotic arm have been displayed. In addition, by introducing the ionic compound KI into the glycerol-based organogel, flexible conductors that could perform stable sensing performance over a wide range of temperatures from -30°C to 60°C have been developed.
研究领域:
材料科学
·
生物仿生学
✓ 已验证
DOI
Journal of Physical Chemistry C
·
2020
·
IF 4.189
Shuxin Zhang,Yan Huang,Yanna NuLi,Baofeng Wang,Jun Yang,Jiulin Wang
Magnesium–sulfur (Mg–S) batteries have received extensive attention due to the high theoretical energy density, low cost, high safety, and environmental friendliness. In this work, sulfurized pyrolyzed polyacrylonitrile (S@pPAN) composite is used as a cathode material of Mg–S batteries, and a comparative study on the effects of different binders on the electrochemical performance is reported for the first time. The selected binders are commercial organic-soluble poly(vinylidene fluoride) (PVDF) and water-soluble poly(ethylene oxide) (PEO), sodium polyacrylate (PAAS), locust bean gum (LBG), guar gum (GG), carboxymethyl cellulose (SCMC), and β-cyclodextrin (β-CD). The binders significantly affect the physical properties of S@pPAN electrodes and thus the electrochemical performance of the batteries. Compared to the traditional PVDF binder and other water-soluble binders, the S@pPAN electrode with an amorphous PAAS binder has better cycle stability and rate capability. The three-dimensional (3D) network formed from PAAS cross-linking improves the cohesion among the electrode constituents, and the adhesion between the electrode laminate and the current collector maintains the uniformity of electrode surface after cycling. The present work demonstrates the feasibility of using green aqueous binders to enhance the electrochemical performance of Mg–S batteries.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2013
·
IF 3.479
Yiming Zhou,Shiyu Fu,Liangliang Zhang,Huaiyu Zhan
Superabsorbents based on carboxylated cellulose nanofibrils (CCNFs) and carboxymethyl cellulose-g-poly(acrylic acid-co-acrylamide) were synthesized. A series of experiments were performed to evaluate the influence of factors such as CCNFs amount, solution pH, temperature, salt solution type and concentration on the swelling behaviors of the hydrogels. The water uptake of the hydrogels strongly depended on the CCNF content, the swelling capacity in distilled water increased dramatically from 245.8 to 458.7 g/g with the addition of CCNFs up to 2.5 wt%. Furthermore, the incorporation of CCNFs improved salt resistance properties of the hydrogels with slower deswelling rate and higher water retention capacity at deswelling equilibrium. Besides, the CCNF nanocomposite hydrogels presented better responsive behavior in relation to pH presence and showed an increase in water retention capacity at various temperatures. Fourier transform infrared spectroscopy (FTIR) and scanning electron microscope (SEM) were employed to examine the structure and morphologies of the prepared superabsorbent hydrogels.
研究领域:
材料科学
·
化学工程
·
生物材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Xinmeng Zhang,Yuanyuan Yao,Yu Wu,Wenjing Liu,Xunwei Wang,Peizhong Feng,Jianming Zhang,Wu Hu,Erdong Shang
Highly flexible hydrogels are widely used in fields such as agriculture, drug delivery, and tissue engineering. However, the simultaneous integration of excellent mechanical properties, swelling properties, and high electrical conductivity into a hydrogel is still a great challenge. This work introduces 1D tubular multi-walled carbon nanotubes (MWCNTs) and 2D layered graphene oxide (GO) into polyacrylamide/poly-acrylic acid (PAM/PAA) hydrogels. The high specific surface area and oxygen-containing groups of GO contribute to excellent mechanical properties and water absorption of the PAM/PAA hydrogels, but the conductivity is poorly affected due to the presence of defects on GO surface. However, MWCNTs with large aspect ratios benefit to form continuous conductive paths in PAM/PAA hydrogels which further improves conductivity of the hydrogels. MWCNTs are entangled with PAM/PAA molecular chains to form a dense three-dimensional (3D) network structure, and this special structure improves the water absorption of PAM/PAA hydrogels by 3.7 g g −1 . What’s more, the MWCNTs/PAM/PAA hydrogel not only provides excellent mechanical properties (compressive strength up to 2.7 MPa), but also has high conductivity (2.3 S m −1 ). In particular, a strain sensor based on MWCNTs/PAM/PAA hydrogel exhibits exceptional sensitivity (gauge factor = 3.9 at 230–300 % strain) with a rapid response (200 ms) over a wide strain range (50 ∼ 200 %) which enables the ability to precisely and reliably monitor human motion. Therefore, the work provides a new insight into the design of multifunctional hydrogels with application on anatomical water plugging, electronic skin, and biosensors.
研究领域:
材料科学
·
生物医学工程
·
传感器技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2021
·Vol. 37
·期 3
·558-564
·
IF 1.307
Jia Yueran,Gong Shun,Zhang Shu,Zhao Shikun,Qin Zhen,Pan Kai
E ncouraged by the porous and stable structure of cold-resist animals’ hair or feather, bio-inspired hierarchical structure yarns combining polyacrylonitrile(PAN) nanofibers and polypropylene(PP) hollow microfibers have been developed by a modified conjugate electrospinning technology. Physical cross-linking has been built to increase fibers adhesion and construct interlayer support for nanofibrous assembly. The nanofibers and hollow microfibers construct a stable porous structure with porosity of 62%, providing excellent thermal insulating ability[temperature difference(|ΔT|) between skin and yarn surface is 4.9 °C] as well as good mechanical property. More interestingly, the water transfer ability (infiltrate the yarn in 10 s) of synthetic fibers has been improved greatly by the combination of thin diameter nanofibers to the yarn. It is believed that the research lays the foundation for bio-inspired engineering technology in the manufacture of thermal comfort.
研究领域:
材料科学
·
生物仿生学
·
纺织工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）