COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Le Wang,Zhixin Duan,Pengfei Fei,Zhifeng Yan,Wei Wang,Youbo Di,Jianjun Lu
The protease method of wool shrink-proofing finishing is challenging to apply industrially due to its low efficiency and prolonged treatment time. In this study, the activator P[(CH 2 ) n OH] 3 , n∈(1, 10) and protease Savinase 16 L were combined and used in the same bath to rapidly degrade wool scales to achieve the target of machine washable for wool. The activator significantly improved the degradation efficiency of 16 L on wool's high-sulfur scale tissue, reducing the wool shrink-proofing treatment time to 100 s. The treated wool samples' area shrinkage, strength, elasticity, length, fineness, and directional friction effect were evaluated. The results showed that the activator combined with Savinase 16 L could rapidly hydrolyze wool fiber scales, and the wool area shrinkage was 1.65 % without excessive damage to the original properties of wool fibers. Furthermore, the reaction mechanism of wool scale degradation by protease and the activator was confirmed by Raman spectroscopy, X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The results showed that the activator worked by activating the wool high-sulfur scale layer, thereby increasing the efficiency of the protease degradation of wool. It had no activating effect on the protease molecule. The activator opens the disulfide bonds on the wool scales while transforming the β-thinning and β-rotation in the scales to α-helix or random curling. It could promote protease adsorption and reaction on wool. Under pH 8.0 and 50℃, 2 g/L of activator could increase the adsorption of 16 L on wool by 12.7 times and increase the hydrolysis activity of 16 L on wool by 1575 times. After treatment with this technology, the content of -NH2, -COOH, and -SOx on the surface of wool was increased. Furthermore, a continuous multiple-padding wool shrink-proofing production line was designed, including a treatment liquid circulation and heat preservation systems. Stable industrial production applications were realized.
研究领域:
纺织科学
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生物化学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2021
·
IF 4.43
Yinglu Sun,Dekun Sheng,Haohao Wu,Xinxin Tian,Haopu Xie,Biru Shi,Xiangdong Liu,Yuming Yang
Synthesis of vitrimer with dynamic covalent bond is a surprising solution to overcome the inherent limitations of traditional thermosets . A bio-based vitrimer-like polyurethane formed by castor oil , vanillin , m-xylylenediamine and 4,4′-dicyclohexylmethane diisocyanate in the preparation has superior mechanical properties , good solvent resistance , good thermal stability. Furthermore, the existence of dynamic imine bond in the vitrimer-like polyurethane is prone for polyurethane to rapid stress relaxation behavior, remoldability, weldability , antibacterial ability. With the hydrolysis of the imine bond, the material can be rapidly degraded at 60 °C for 1 h. In addition, it's commendable that the material exhibits excellent reprocessability that can be maintained at 86% even after 3 consecutive smash/mold pressing cycles. This work provides a promising method to manufacture bio-based polyurethane thermosets with excellent reprocessability, rapidly-degradable and antibacterial property, which has also promoted the high-value utilization of biomass materials.
研究领域:
材料科学
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化学工程
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生物材料
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2023
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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
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药剂学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2020
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IF 16.683
Kexin Li,Yun Zhong,Shenglian Luo,Wenying Deng
In this article, a series of powder and modular H 3 PW 12 O 40 /Ag 3 PO 4 composites were successfully fabricated for the first time by simple strategies. The as-prepared powder and modular H 3 PW 12 O 40 /Ag 3 PO 4 composites showed the unique photocatalytic characteristic of ultra-fast degradation of organic pollutants in water under visible-light. For the best powder H 3 PW 12 O 40 /Ag 3 PO 4 , 4-fluorophenol (4-FP) and methyl orange (MO) in water can be completely degraded and rhodamine B (RB) in water can be degraded to 78 % after 360 s of visible-light irradiation. For the best modular H 3 PW 12 O 40 /Ag 3 PO 4 , 4-FP, MO, and RB can be degraded to 84 %, 72 %, and 92 % after 30 min of visible-light irradiation. The reasons for this unique photocatalytic characteristic of as-prepared powder and modular H 3 PW 12 O 40 /Ag 3 PO 4 composites were systematically studied by various modern characterization strategies. The "four-step" strategy was proposed in order to realize the practical engineering application of as-prepared powder and modular H 3 PW 12 O 40 /Ag 3 PO 4 composites in photocatalytic organic wastewater treatment technology.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
DOI
高影响因子
RSC Advances
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2021
·Vol. 11
·期 36
·22125-22130
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IF 3.361
Chuan Zhou,Shouxin Zhang,Hongjie Pan,Guang Yang,Lingyun Wang,Cheng-an Tao,Heguo Li
The potential threat that has originated from chemical warfare agents (CWAs) has promoted the development of advanced materials to enhance the protection of civilian and military personnel. Zr-based metal–organic frameworks (Zr-MOFs) have recently been demonstrated as excellent catalysts for decomposing CWAs, but challenges of integrating the microcrystalline powders of Zr-MOFs into monoliths still remain. Herein, we report hierarchically porous monolithic UiO-66-X xerogels for the destruction of CWAs. We found that the UiO-66-NH2 xerogel with a larger pore size and a higher surface area than the UiO-66-NH2 powder possessed better degradability of 2-chloroethyl ethyl sulfide (2-CEES), which is a sulfur mustard simulant. These UiO-66-X xerogels exhibit outstanding performance for decomposing CWAs. The half-lives of vesicant agent sulfur mustard (HD) and nerve agent O-ethyl S-[2-(diisopropylamino)ethyl] methylphosphonothioate (VX) are as short as 14.4 min and 1.5 min, respectively. This work is, to the best of our knowledge, the first report on macroscopic monolithic UiO-66-X xerogels for ultrafast decomposition of CWAs.
研究领域:
材料科学
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化学工程
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2024
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IF 5.8
Yongliang Ding,Chengxin Zhang,Bingbing Shi,Yiyun Wang,Pengfei Tang,Cheng Liu,Jingjing Fan,Zhongkai Wang,Feng Jiang
Degradable polymers typically require prolonged exposure to harsh conditions for degradation, but this extended duration and severe treatment often result in incomplete breakdown, leading to the formation of harmful microplastics that pose significant environmental pollution risks. In this work, degradable alternating polyamide hard segments and soft crystallizable segments were combined by amide groups to design thermoplastic bio-based polyesteramide elastomers (PEAEs) with customizable properties and rapid degradability. The hard segment of the polymer features an alternating arrangement of amide and ester bonds. This arrangement facilitates the formation of small molecule monomers when the ester bond is broken, preventing microplastic contamination that may arise from incomplete degradation of the hard segment. Additionally, the inclusion of side groups in the soft segment disrupts the crystallization, enhancing its susceptibility to solvent penetration and thereby accelerating the degradation rate. After step-cyclic tensile tests, additional physical cross-linking points were formed in PEAEs to enhance their mechanical strength and elasticity. Furthermore, PEAEs demonstrated outstanding processing capabilities, including compounding, extrusion, pelletization, and spinning. This innovative approach introduces fresh design concepts for the industrial application of bio-based degradable polymers, playing a pivotal role in advancing resource conservation and environmental protection.
研究领域:
材料科学
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聚合物化学
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环境科学
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生物降解材料
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可持续工程
✓ 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）