Food and Bioprocess Technology
·
2020
·Vol. 13
·期 9
·1621-1632
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IF 3.356
Wan Jiawei,Pei Yaqiong,Hu Ying,Ai Tingyang,Sheng Feng,Li Jing,Li Bin
Preservation of refrigerated meat has always been a concern in food industry. In our study, eugenol (Eu) microcapsules were prepared to solve this problem. Eu was embedded into a gelatin-based emulgel with both low-energy and high-energy methods. The emulgel was further spray dried to obtain the Eu microcapsule. The physicochemical properties, microstructure, and thermodynamic properties of the microcapsules were studied. Results showed that the microcapsule powders prepared from the high-energy emulgel (HEG) contained less water and appeared no caking. But the microcapsule prepared from the low-energy emulgel (LEG) showed more regular shape. After dissolution, the reconstructed emulgel was investigated in terms of texture, microstructure, thermal properties, and preservation effects. Reconstructed emulgel from both LEG and HEG showed significantly higher gel strength but similar thermal properties comparing to the fresh one. In addition, meat covered with reconstructed emulgel showed less weight loss and more stable pH and total volatile basic nitrogen (TVB-N) value, as well as stronger resistance to bacterial reproduction, especially against lactic acid bacteria. The results indicated that the microencapsulation of Eu through gelatin-based emulgel might be a convenient and effective technology for refrigerated meat preservation.
研究领域:
食品科学
·
生物技术
✓ 已验证
DOI
高影响因子
POLYMER
·
2022
·
IF 4.432
Simin He,Fuquan Zhang,Shuo Liu,Haipeng Cui,Song Chen,Wenfeng Peng,Guojing Chen,Xiaoxue Liao,Lusheng Liao
The structures and properties of natural rubber (NR) obtained from latex with small and large rubber particles (SRP and LRP) are obviously different, while carbon black (CB)/SRP or CB/LRP composites have rarely been reported. In this work, SRP and LRP are separated from natural rubber latex (NRL). The properties of obtained NR/CB composites are systematically investigated as a function of SRP and LRP mass ratios. It shows that the nitrogen content of SRP (1.32%) is much higher than that of LRP (0.10%). Mechanical properties increase with the increase of LRP content because plenty of agglomerates exist in SRP/CB composite whereas LRP/CB composite shows a homogeneous dispersion. Furthermore, a possible model is proposed to illustrate the transformations of agglomerates during stretching and dynamic compressing process. This study provides a new perspective for the design of NR materials through the selection of rubber particles in NRL.
研究领域:
材料科学
·
聚合物科学
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产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2023
·Vol. 30
·期 8
·1-11
·
IF 2.8
Chen Fanfan,Xiao Yao,Yan Sitong,Fang Lin,Wang Zhifen,Liao Jianhe
Modifying natural rubber latex (NRL) and blending it with NRL can improve NRL performance and expand application fields. The performance of co-blended latex will change due to changes in non-rubber components during storage. Therefore, it is important to study the change of properties during the storage of co-blended latexes. In this paper, 30% methyl methacrylate grafted natural rubber (MG30) was synthesized by cumene hydroperoxide/ tetraethylenepentamine (CHPO/TEPA) initiating system, MG30 and NRL were mixed in different proportions to study the morphology and physical and mechanical properties, and the colloidal properties and emulsion properties of co-blended latexes were studied during storage. The results showed that the mechanical stability of NRL and co-blended latexes were high and the viscosity gradually increased during storage. The study of the vulcanization characteristics of the co-blended latexes films and the physical and mechanical properties of the vulcanized latex films showed that the vulcanization time of the co-blended films increased and the torque value increased in comparison to NRL. With the increase of MG30 content, the tensile strength and tear strength of the co-blended latexes vulcanized films showed a trend of increasing and then decreasing, and the co-blended film with 10% MG30 showed the best mechanical properties.
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
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 134
·期 32
·45111
·
IF 1.86
Yangcheng Lu,Xiaojing Liu,Guangsheng Luo
Compared with low molecular surfactants, poly(vinyl alcohol) (PVA) could afford latexes with particular tackiness as an important property for various applications. However, until now, except for some highly reactive monomers, most of monomers including styrene seldom use PVA as protective colloid in emulsion polymerization. In this work, we used oil-soluble initiator, 2,2′-azobisisobutyronitrile, to accelerate the copolymerization of styrene and divinyl benzene in PVA protected colloids and synthesize polystyrene (PS) latex within 50 min at 70 °C successfully. The reaction system could remain stable even at the monomer-to-water ratio as high as 1:4, and the polymerization in pseudo-micelles or latex particles was always dominant. The adjustment of the size of the PS latex in the range from 70 to 100 nm was facilely achieved by changing the polymerization temperature, the addition of PVA, or the monomer-to-water ratio. This method was also exploited to synthesize poly(styrene- co -methyl methacrylate) and poly(styrene- co -4-chlorostyrene) latexes, indicating prospects in applications with the advantages of high capacity and broad applicability. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 45111.
研究领域:
高分子化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2020
·Vol. 104
·期 4
·1902-1907
·
IF 3.502
Yu Zheng,Xudong Luo,Jiegang You,Ting Li,Qingdong Hou
Ceramic foam materials with highly porous microstructure are playing vital role in increasing areas, especially for those with requirements for open channels and superior specific surface area. In this work, a simple and versatile approach to prepare ceramic foams with open pores has been proposed, that is gelation of boehmite nanoparticle-assembled emulsions. Notably, hierarchical porous microstructure with open channels and uniform pore structure has been built. High specific surface area up to389.4 m 2 /g is attainable, making it excellent adsorption material when combining the merit of hierarchical pore structure. Furthermore, lattice-shaped ceramics are prepared via direct ink writing gelled emulsion, displaying the potential of forming lightweight material with complex shape and designable macrostructure. The three-dimensional (3D) printed foams exhibit multiple open pores, which cover length scale from mm scale, to μm scale and nm scale, making them promising materials in several fields like adsorption and gas filtrations, etc.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOID AND POLYMER SCIENCE
·
2020
·Vol. 298
·期 9
·1263-1271
·
IF 1.536
Wei Yan-Chan,Xia Jie-Hui,Zhang Ling,Zheng Ting-Ting,Liao Shuangquan
Dipping product of natural rubber (NR) latex has superior comprehensive properties superior to those made from synthetic latex. Compared with synthetic latex, the component characteristics of NR show the existence of non-rubber components (NRC). In this paper, NRC, mainly proteins and phospholipids, are separately removed by enzyme treatment to study their effect on the film formation behavior of natural rubber latex. The changes of NR latex particles are in situ visualize by using freeze-drying SEM technology and AFM during the film formation process. The results demonstrate that contact, deformation, and coalescence of latex particles occur more readily after the removal of proteins and phospholipids. It shows that removing NRC can quicken NR film formation. However, the mechanical properties of the NR film decrease in the absence of NRC. Based on the research, a film formation mechanism for NR latex is proposed, which can provide a more insightful understanding toward the structure-property relationship of NR film.
Graphical abstract
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
Nanoscale
·
2022
·Vol. 15
·期 4
·1835-1848
·
IF 8.307
Wenjing Xie,Han Li,Houqiang Yu,Hongfu Zhou,Anran Guo,Qing Yao,Ling Zhang,Yongsheng Zhao,Hongan Tian,Ling Li
Iodized oil has an excellent X-ray imaging effect, but it shows poor embolization performance. When used as an embolic agent, it is easily washed off by the blood flow and eliminated from the body. Therefore, it is essential to use iodized oil in combination with solid embolic agents such as gelatin sponge or to perform multiple embolization procedures to achieve the therapeutic effect. In the present study, a poly(N-isopropyl acrylamide)-co-acrylic acid (PNCAA) temperature-sensitive nanogel was synthesized by emulsion polymerization; the nanogel was then emulsified with iodized oil to prepare a thermosensitive iodized oil Pickering gel emulsion (TIPE). The oil–water (O/W) ratio of an O/W emulsion system can reach 4 : 6. When injected into the body, TIPE transforms into a nonflowing coagulated state at physiological temperature; the iodized oil is locked in the emulsion structure, thereby achieving local embolization and continuous imaging effects, which not only retain the X-ray imaging effect of the iodized oil but also improve its embolization effect. Subsequently, we further evaluated renal artery embolization in a normal rabbit renal artery model, and the results showed that TIPE shows a long-term conformal embolization performance and excellent long-term X-ray imaging ability.
研究领域:
医学材料学
·
介入放射学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2022
·Vol. 27
·期 19
·6542
·
IF 4.927
Jialing Chen,Qing Li,Ruijie Du,Xinke Yu,Zhili Wan,Xiaoquan Yang
Responsive dual-structured emulsions and gel emulsions have attracted more and more attention due to their complex microstructures, on-demand responsive properties, and controlled release of active cargoes. In this work, the effect of monoglyceride (MG)-based oil phase structuring on the formation and stability, structural properties, and thermoresponsive and cargo release behavior of gel emulsions stabilized by glycyrrhizic acid (GA) nanofibrils were investigated. Owing to the formation of GA fibrillar networks in the aqueous phase and MG crystalline networks in the oil phase, a stable dual-structured gel emulsion can be successfully developed. The microstructure of the dual-structured gel emulsions largely depended on the concentration of MG in the oil phase. At low MG concentrations (1–2 wt%), the larger formed and lamellar MG crystals may pierce the interfacial fibrillar film, inducing the formation of partially coalesced droplets. In contrast, at high MG concentrations (4 wt% or above), the smaller MG crystals with enhanced interfacial activity can lead to the formation of a bilayer shell of GA nanofibrils and MG crystals, thus efficiently inhibiting the interfacial film damage and forming a jamming structure with homogeneously distributed small droplets. Compared to pure GA nanofibril gel emulsions, the GA−MG dual-structured gel emulsions showed significantly improved mechanical performance as well as good thermoresponsive behavior. Moreover, these stable GA−MG gel emulsions can be used as food-grade delivery vehicles for encapsulating and protecting hydrophobic and hydrophilic bioactive cargoes. They also have great potential as novel and efficient aroma delivery systems showing highly controlled volatile release. The dual-structured emulsion strategy is expected to broaden the applications of natural saponin GA-based gel emulsions in the food, pharmaceutical, and personal care industries.Keywords:glycyrrhizic acid;monoglyceride;dual-structured gel emulsions;thermoresponsive;controlled release
研究领域:
食品科学
·
药学
·
个人护理产品
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD HYDROCOLLOIDS
·
2024
·
IF 11
Xin Feng,Hankun Zhu,Hongjie Dai,Yong Yu,Hongxia Tan,Mi Tang,Kangting Sun,Yapeng Lu,Yugang Liu,Liang Ma,Yuhao Zhang
The tight cellulose network skeleton was designed and constructed in the continuous phase of gelatin emulsions with low oil phase via regulating the pH value of cellulose nanocrystals (CNCs) and gelatin (pH = 7), mainly investigated the influences of cellulose network skeleton on the stability, gastrointestinal tolerance, digestion or absorption of model functional molecules (lycopene). The interfacial tension and confocal laser scanning microscopy (CLSM) results showed the cellulose network skeleton has been successfully constructed, which improved the stability of low-oil gelatin emulsions. From the results of retention rate and DPPH, the cellulose network skeleton demonstrated excellent protective effects on lycopene (i.e., storage stability, thermal stability, UV stability). Moreover, the designed cellulose network skeleton can serve as a barrier to restrain aggregation of droplets during the gastrointestinal digestion process, reduced droplet size. Meanwhile, it inhibited the digestion of oil droplets, reduced the release of free fatty acid (FFA, ∼20%), enhanced the gastrointestinal tolerance of lycopene, thereby improved its bioavailability (∼18.27%). Therefore, this study can supply theoretical support for the protection of functional components and the regulation of their digestion and absorption.
研究领域:
食品科学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2019
·
IF 6.395
Jiaojiao Zhang,Zheng Li,Xiaojing Cui,Jinlong Li,Shiyu Jia,Yingxiong Wang,Hongliang Wang,Xianglin Hou,Tiansheng Deng
Chemical reactions with products of high reactivity generally suffer from low yields due to the severe side reactions. This is the case for the synthesis of acrolein from glycerol dehydration. To improve the yield of acrolein, fast removal of high reactive acrolein molecules from the reaction system is desirable but remains a major challenge, due to the high viscosity of glycerol. To tackle this problem, the Pickering emulsion was chosen as the reaction system in this work to accelerate the removal of acrolein. A water-in-oil Pickering emulsion was fabricated for the liquid phase dehydration of glycerol to acrolein, which exhibits twice yield of acrolein compared with the homogeneous system. The combination of the transfer experiments and IR analysis confirmed the drastic restrain of the side reactions between acrolein and glycerol, due to the intensified mass transfer of acrolein from the liquid phase by the larger microinterface of emulsion. Furthermore, the transfer rate of acrolein through the water-oil interface can be tuned via a shift in the interfacial properties of the silica emulsifier by silylation treatment. The highest acrolein yield of nearly 50% was obtained with the highest transfer rate of acrolein on the silica silylated by (MeO) 3 Si(CH 2 ) 11 CH 3 .
研究领域:
化学工程
·
界面科学
·
催化反应
✓ 已验证
产品关联
DOI
高影响因子
Membranes
·
2022
·Vol. 12
·期 10
·933
·
IF 4.562
Heliang Wang,Fanrong Meng,Mingyuan Yi,Lin Fang,Zhifen Wang,Shoujuan Wang
Natural rubber latex (NRL) is commonly employed to manufacture medical protective appliances. However, the characteristics of weakness and fragility of NRL membranes limit their further application. To achieve excellent strength and damage-resistance of the rubber membrane, this work reported a facile core–shell structure construction strategy via self-assembly with modified sodium lignosulfonate (MSLS) and NRL to create a tough membrane. The double network can be formed after introducing polyamide epichlorohydrin resin (PAE) into the NRL membrane. Specifically, the first robust MSLS-PAE network can break in advance to dissipate applied energy, thereby achieving high fracture energy and tensile strength of ~111.51 kJ m−2and ~37 MPa, respectively, which overtakes numerous soft materials. This work facilitates more studies on latex/lignin-based products with high performance and good stability for the functional application of biopolymer.Keywords:natural rubber latex membrane;self-assembly;double network;toughening;sodium lignosulfonate
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Soft Matter
·
2023
·Vol. 19
·期 34
·6604-6611
·
IF 3.4
Min Xue,Gang Wang,Enrui Lin,Ping Sun,Beibei Li,Pengna Li,Shiying Hua
In the research of gel emulsions, it is a great challenge to develop a new method for fabrication of gel emulsions and utilize them in preparing novel porous materials containing metal complexes. In this work, we proposed to use coordination self-assemblies of two building blocks, organic ligands and metal ions, as stabilizers to prepare gel emulsions, which could be used as templates to prepare porous materials containing metal complexes. Aromatic carboxylic ligands CDCn (n = 4, 6, 8, and 10) containing cholesterol groups were designed and synthesized, and were used as organic ligands to fabricate new W/O gel emulsions through the coordination self-assembly with Tb3+/Eu3+ at the oil–water interface. The gel emulsions based on CDC6 possess injection molding properties, which were rarely seen in conventional gel emulsions. EDX mapping and XPS and FTIR analyses revealed that the coordination self-assembly of CDC6 and Tb3+ at the oil–water interface was the main driving force for the gel emulsion formation. CDC6/Tb3+/styrene/H2O gel emulsions could be further used as templates to prepare low-density porous metal complex/polymer composites with typical luminescence emissions of terbium complexes. This work extends the method for preparation of gel emulsions and develops a novel approach to obtain porous materials containing metal complexes.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）