Electrospun non-leaching biocombatible antimicrobial cellulose acetate nanofibrous mats

Rong Li,Xuehong Ren,Qianyuan Jiang,Zhiwei Xie,Tung-Shi Huang 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.27 No.-

In this study cellulose acetate (CA) was modified with 4,40-diphenylmethane diisocyanate (MDI, an Nhalamineprecursor) in solution to form chemical bonds between CA and MDI to avoid the potentialrelease of biocides from CA. Nanofibers were obtained by electrospinning the CA–MDI solution. Theobtained CA–MDI nanofibers were characterized by FT-IR, SEM, TGA and DSC. TGA and DSC dataindicated that the CA–MDI nanofibers before and after chlorination had good thermal stability comparedwith CA nanofibers. 58% of active chlorine was lost after 2 h of UVA irradiation, and most of the activechlorine was lost after 4 h of UVA irradiation. However, about 85% of the chlorine could be regeneratedby rechlorination after 24 h of UVA irradiation. The active chlorine of the chlorinated nanofibers releasedslowly in water. The chlorinated CA–MDI nanofibers showed excellent antimicrobial properties againstEscherichia coli O157:H7 and Staphylococcus aureus within brief contact times. Also, the chlorinated CA–MDI nanofibers showed good biocompatibility.

Electro-spun Antimicrobial Acrylic Fiber

Jaewoong Lee,Xuehong Ren,R. M. Broughton,Jie Liang,S. D. Worley,T. S. Huang 한국염색가공학회 2007 韓國染色加工學會誌 Vol.19 No.2

Synthesis and Application of Benzotriazole UV Absorbers to Improve the UV Resistance of Polyester Fabrics

Chunli Li,Wei Ma,Xuehong Ren 한국섬유공학회 2019 Fibers and polymers Vol.20 No.11

In this study, 2-(2-hydroxy-4-acryloyl)-2H-benzotriazole (BTHA), a benzotriazole ultraviolet absorber monomer,was synthesized from 2-(2,4-dihydroxyphenyl)-benzotriazole (BTDP) and acryloyl chloride. The synthesized BTHA wascharacterized by 1H-NMR, FTIR, and ultraviolet spectroscopy, and grafted onto polyester fabrics by the traditional pad-drycure(PDC) process. The effects of monomer concentration and initiator concentration on the UPF values of the grafted PETfabrics were studied. The grafted fabrics were characterized by scanning electron microscopy (SEM), X-ray photoelectronspectroscopy (XPS), and thermogravimetric analysis (TGA). The breaking strength of the grafted PET fabrics wascomparable with the original PET fabrics in warp and weft directions. The UV protection factors improved significantly aftergrafting. The modified PET fabrics exhibited good durability to washing. The grafting of BTHA onto PET fabrics protectedthe damage of UV light to PET fabrics and decreased the strength loss of PET fabrics after UVA light exposure.

Inorganic-organic Hybrid Nanoparticles and Their Application on PET Fabrics for UV Protection

Chunli Li,Rong Li,Xuehong Ren 한국섬유공학회 2020 Fibers and polymers Vol.21 No.2

In this paper, we reported the synthesis of TiO2/γ-(methacryloyloxy)propyltrimethoxysilane (KH570) hybrid nanoparticles with simple and mild condition at room temperature. The as-prepared TiO2/KH570 hybrid nanoparticles were characterized by FT-IR, XRD, SEM, EDS, and XPS. The hybrid nanoparticles were coated onto the surfaces of polyethylene terephthalate (PET) fabrics by pad-dry-cure (PDC) process. The morphology, structural, and chemical composition of the coated fabrics were analyzed by SEM, EDS, and XPS. The ultraviolet protection factor (UPF) was used to evaluate the UV protection property of PET fabrics. The coated PET fabric exhibited good UV resistance abilities with a UPF value of 50+. The air permeability of the coated PET fabrics decreased significantly compared with the original PET fabrics. The coated PET fabrics also showed good washing stability. The coated fabrics had an excellent protective effect against ultraviolet rays after exposure to ultraviolet light for a period of time. The PDC process only caused a small degree loss of the tensile strength of the coated PET fabrics.

Functionalization of PET fabric via silicone based organic–inorganic hybrid coating

Que Kong,Zhiguang Li,Zuoliang Zhang,Xuehong Ren 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.83 No.-

In this paper, silica dioxide nanoparticles (SiO2) were synthesized and functionalized with noctadecyltriethoxysilane(OD) through a modified Stöber method for the preparation of organic–inorganic hybrid micro-nanoparticles. Organic–inorganic hybrid micro-nanoparticles were applied ontothe polyester (PET) fabric via a conventional “dipping–drying” process for thefluoro-free water-repellenttextile materials. The coated PET fabric surface showed micro/nano-structures and exhibitedhydrophobic behavior with water contact angle of 141 . The surface morphologies, surface chemicalcomposition and contact angles of the coated fabrics surface were measured. Furthermore, the dynamichydrophobic behavior of water droplet impact on the fabric was investigated. By analyzing the energychange, D(t)/D0 value and H(t)/D0 value during water droplet impact were measured. The water dropletshowed an obvious effect of the dynamic rebound behavior on the coated fabric surface, furtherconfirming that the coated PET fabric had hydrophobicity. After the rubbing and washing durability,mechanical and chemical stability treatment, the coated PET fabrics still maintained high hydrophobicityand displayed good water-repellent durability. Last but not least, PET hydrophobic fabrics exhibitedexcellent self-cleaning properties with dyes on the fabric surface.

Preparation of Durable Antibacterial Cellulose with AgCl Nanoparticles

Zhipeng Ma,Maoli Yin,Zhenming Qi,Xuehong Ren 한국섬유공학회 2018 Fibers and polymers Vol.19 No.10

In this study, a facile method was developed to coat AgCl nanoparticles (NPs) onto knitted cotton fabrics. The AgCl NPs were characterized by ultraviolet absorption spectrum, X-ray diffraction (XRD) and dynamic laser light scattering (DLS). The AgCl NPs were coated onto cotton fabrics through a pad-dry-cure process with the assistance of 1,2,3,4- butanetetracarboxylic acid (BTCA). Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), ICP-OES analysis and energy-dispersive X-ray spectroscopy (EDX) confirmed that AgCl NPs were successfully coated onto cotton fabrics. The prepared cotton samples exhibited excellent antimicrobial activity against both Gram-positive S. aureus and Gram-negative K. pneumonia bacteria. Rat skin fibroblast cytotoxicity testing demonstrated the treated cotton fabrics to be non-toxic. The washing durability evaluation showed that the antimicrobial function of cotton fabrics was durable to washing. In addition, the wrinkle resistance of the coated cotton fabrics was improved and there was no obvious change in whiteness.

Antibacterial PET Fabrics Modified with Quaternary Ammonium Functionalized Hyperbranched Polymers via Electron Beam Radiation

Shumin Zhang,Fang Ding,Zhiguang Li,Xuehong Ren,Tung-Shi Huang 한국섬유공학회 2020 Fibers and polymers Vol.21 No.10

The numerous functional groups and dendritic structure of hyperbranched polymers render them for a wide rangeof applications. In this study, hyperbranched polymer Boltorn H20, containing abundant hydroxyl groups, was modified toprepare quaternary ammonium functionalized hyperbranched polymers, QAS-HPs. The synthesized QAS-HPs were coatedon polyethylene terephthalate (PET) fabrics by electron beam radiation. The PET fabrics were endowed antimicrobial andhydrophilic properties after modification. The water contact angles of the modified PET fabrics were tested, and the resultsshowed significant improvement in hydrophilicity. The results of antibacterial efficacy tests showed that the modified PETfabrics could inactivate 100 % of Staphylococcus aureus (S.aureus) and 90.8 % of Escherichia coli O157:H7 (E. coliO157:H7) with 30 min of contact time.

Antibacterial and Hydrophilic Modification of PET Fabrics by Electron Beam Irradiation Process

Shumin Zhang,Fang Ding,Yingfeng Wang,Xuehong Ren,Tung-Shi Huang 한국섬유공학회 2020 Fibers and polymers Vol.21 No.5

Electron beam (EB) irradiation has been utilized to modify materials for various applications due to its remarkableadvantages. As an efficient and environmental-friendly way for antibacterial and hydrophilic purposes, EB irradiation wasapplied to modify polyethylene terephthalate (PET) fabrics by grafting with a N-halamine precursor monomer 3-allyl-5,5-dimethylhydantoin (ADMH) and acrylic acid (AA) in this study. The grafted PET fabrics were loaded with silver ions tofurther enhance the antimicrobial efficacy. The hydrophilicity of the modified PET fabrics was evaluated by testing the watercontact angles with different contact times. The breaking strength and thermal stability of the modified swatches werestudied. The UVA light stability results showed the chlorine loading of the modified PET fabrics decreased with the extensionof UVA exposure time, and most chlorine loading could be recovered by re-chlorination. The antibacterial test showed thatthe modified PET swatches can inactivate all inoculated S. aureus and E. coli with short contact times.

Antibacterial Coating of Cellulose by Iso-bifunctional Reactive N-halamine with the Dyeing Process of Reactive Dye

Tong Mu,Nengyu Pan,Yingfeng Wang,Xuehong Ren,Tung-Shi Huang 한국섬유공학회 2018 Fibers and polymers Vol.19 No.11

In this study, we synthesized a novel N-halamine precursor, sulfuric acid mono-[2-(4-[4-chloro-6-(2-[4,4- dimethyl-2,5-dioxo-imidazolidin-1-yl]-ethylamino)-[1,3,5]triazin-2-ylamino]-benzenesulfonyl)-ethyl] ester sodium (TB), which contains two reactive groups of monochloro triazine reactive groups and bis-sulphatoethylsolphone reactive groups. The structure of TB is similar to iso-bifunctional group reactive dyes and could be coated on cotton fabrics by covalent bonds through a reactive dyeing process. The cotton coated with TB was characterized by FTIR and SEM. After chlorination, the treated cotton fabrics showed excellent antibacterial efficacy and inactivated all inoculated S. aureus (ATCC 6538) and E. coli O157: H7 (ATCC 43895) within 1 min of contact. Over 85 % of tensile strength retained both in warp and weft directions after treatment and chlorination. Almost 80 % of active chlorine can be regained by treating with household bleach after extensive washing and long time storage.

Layer-by-Layer Self-assembly of Organic-inorganic Hybrid Intumescent Flame Retardant on Cotton Fabrics

Shanshan Li,Fang Ding,Xinghuan Lin,Zhiguang Li,Xuehong Ren 한국섬유공학회 2019 Fibers and polymers Vol.20 No.3

In this study, a novel organic-inorganic hybrid intumescent flame-retardant composed of nanosilica (SiO2) coveredwith polyethyleneimine (PEI) and phytic acid (PA) was coated on cotton fabrics by layer-by-layer (LbL) self-assembly toimprove flame retardancy of cotton fabrics. FT-IR, SEM and EDX were used to characterize the deposition of SiO2-PEI/PA on the surface of cotton fabrics. The LbL assembly process had a minor effect on the tensile strength of cotton fabrics. With the synergistic effect of phosphorus, nitrogen and silicon, the coated cotton fabrics with only 7 bilayers exhibited excellent flame retardancy with an LOI value of 33.7 % and a char length of 7.5 cm. TG analysis results showed that cotton/(SiO2-PEI/PA)7 had 40.7 % char residue at 600 oC, compared with 8 % char residue of uncoated cotton fabrics. Cone calorimetry test confirmed that cotton/(SiO2-PEI/PA)7 displayed a major reduction in peak of heat release rate (pHRR) of 75 % and total heat release (THR) of 52 %.