کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1383090 1500611 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermo-responsive and compression properties of TEMPO-oxidized cellulose nanofiber-modified PNIPAm hydrogels
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Thermo-responsive and compression properties of TEMPO-oxidized cellulose nanofiber-modified PNIPAm hydrogels
چکیده انگلیسی


• TEMPO-oxidized cellulose nanofibers (TO-CNF) were isolated from bamboo pulp.
• TO-CNF successfully modified the poly(N-isopropylacrylamide) hydrogels.
• The modified hydrogels exhibited enhanced swelling and compressive properties.

In this study, TEMPO-oxidized bamboo cellulose nanofibers (TO-CNF) with anionic carboxylate groups on the surfaces were in-situ incorporated into poly(N-isopropylacrylamide) (PNIPAm) matrix to improve its thermo-responsive and mechanical properties during the polymerization. The microstructure, swelling behaviors, and compressive strength of resultant PNIPAm composite hydrogels with varying contents of TO-CNFs (0–10 wt%) were then examined, respectively. Modified hydrogels exhibited the similar light transparency to pure PNIPAm one due to the formation of semi-IPN structure between PNIPAm and TO-CNF. FT-IR spectra demonstrated that the presence of TO-CNF did not alter the position of characteristic peaks associated with PNIPAm. SEM observation suggested that the pore size of PNIPAm hydrogels was markedly increased after the incorporation of TO-CNF. Also, the composite hydrogels showed superior swelling behavior and much improved compression properties with respect to pure PNIPAm one. Thus, TO-CNF appeared to be a “green” nanofiller that can simultaneously improve swelling and mechanical properties of PNIPAm hydrogel.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 147, 20 August 2016, Pages 201–207
نویسندگان
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