Cellulose–PEG grafts from cotton waste in thermo-regulating textiles

Abstract

This study focused on the production of heat storage materials from cotton wastes by incorporating a phase-change material and determination of their thermo-regulating properties. Polyethylene glycol (PEG) was grafted onto a cellulosic cotton backbone to give solid–solid phase change properties. The change in the surface morphology of the fibers was studied by scanning electron microscopy. Chemical characterization of the fibers was carried out using Fourier-transform infrared radiation spectroscopy. Thermal analysis of the modified fibers was performed by differential scanning calorimetry, and the thermal regulating properties of the PEG-grafted fibers were investigated using a thermal history system comprising insulated boxes, temperature sensors and a data-logger. Static thermal insulation measurements were also carried out on the fibers. The PEG-grafted cellulose fibers were shown to absorb up to 33.8 J/g heat at 33.0℃, releasing 31.5 J/g heat at 29.4℃, during the phase transitions. Thermal history results showed that temperature of the box containing PEG1000-incorporated fiber differed by 1–1.5 ± 0.1℃ from the temperature of the box containing untreated cotton fibers over 23–25 minutes. Based on these results it is concluded that PEG-grafted cellulose has sufficiently high energy storage properties to be employed as a thermo-regulating material.

Wet‐driven shape‐memory behaviors and thermal adaptability of cotton knitted fabrics containing crosslinked poly(ethylene glycol) moieties

“…The increase in the ether bonds enhanced the wet‐driven shape‐memory behaviors of the fabrics. As shown in Figures (b) and (b), the weak peak at 1365 cm −1 corresponding to CH 2  deformation stretching of PEG confirmed the deposition of PEG on the surface of the treated fibers …”

“…Poly(ethylene glycol) (PEG) as a functional polymer material has been widely investigated in thermally induced shape‐memory materials and in smart‐phase‐change materials, and its applications in wet‐driven shape‐memory materials have rarely been reported.…”

Faz Değiştiren Madde (FDM) İçerikli Mikrokapsül Uygulanmış Fonksiyonel Çorapların Konfor Performanslarının İncelenmesi

“…Diğer konfor ölçümlerinde olduğu gibi FDM'lerin etkileri genellikle geliştirilen, farklı metot ve cihazlar ile yapılmaktadır. Bu çalışmalar arasında FDM içeren ve içermeyen kumaşların termal dirençlerinin ölçülmesi [33][34], sıcaklık düzenleme faktörünün belirlenmesi [34][35][36], infrared görüntüleme [34,37], klimalı ortamlarda termal mankenler üzerinde değişken koşullarda vücut sıcaklık ölçümleri [38][39][40][41] ve T-History (Thermal History) sistem ölçümleri [25,[42][43] şeklindedir. Ayrıca, FDM içerikli kumaşlardan giysi üretilip giysi formundaki ısıl düzenleme özellikleri de bir dizi çalışma ile incelenmiştir [34,39,[44][45][46][47].…”

A multi-functional textile that combines self-cleaning, water-proofing and VO2-based temperature-responsive thermoregulating

“…The main functions of the traditional textiles were to keep the human body warm and dry in cold climates [1] and to protect from the heat and sun in warm climates. Today, continuous growth in the world's population and improvements in living standards have required textiles with new functions to meet changing needs [2]. The World Health Organization reports that 20-50% of the workforce in industrialized countries is currently subject to rigorous environments, and this rate could be even higher in developing and newly industrialized countries [3].…”