Cellulose/Poly(meta-phenylene isophthalamide) Light-Management Films with High Antiultraviolet and Tunable Haze Performances

Abstract

Light-management films are usually fabricated from the petrochemical-based polymers, and developing renewable and biodegradable cellulose-based light-management films with high transparence, tunable haze, and UV-blocking capacity by a facile and large-scale production method is still challenging. Herein, cellulose/poly(meta-phenylene isophthalamide) (PMIA) lightmanagement films were manufactured by simple blending, which was fit for the large-scale production of cellulose/PMIA films. It was found that the cellulose/PMIA composite films showed tunable haze (14−55%), high transparence (>78%), UV-blocking capacity, and irradiation stability. In addition, the elongation at break and tensile strength of the composite film can be improved to 23.78% and 55.90 MPa compared to those of the native cellulose film (21.94% and 45.83 MPa), ascribed to copious hydrogen bonds between PMIA and cellulose molecules. Hence, the cellulose/PMIA light-management films with enhanced optical and mechanical properties were fabricated successfully, and they showed great potential in flexible displays and energy-efficient buildings.

Translucent and Anti-ultraviolet Aramid Nanofiber Films with Efficient Light Management Fabricated by Sol–Gel Transformation

“…Combining the high-temperature resistance, high thermal stability, and good flame-retardant performance of aramid materials, a more comfortable, healthy, safe, and energy-efficient dwelling building is presented, as displayed in Figure c. Similar to our previous work, Figure d provides a facile, feasible, and efficient continuous production line of ANF gels and films, which is important for the industrial manufacturing of the light management ANF films in large scale. Therefore, ANF films with excellent performances are good candidates for light management applications in modern society.…”

“…It is clear to see the background patterns covered with Film 0 with 10 mm distance (Figure d1), while the background patterns become vague to the naked eyes with the increasing content of ethanol in the coagulation bath. Consequently, the background patterns are difficult to be seen when covered with Film 75 and Film 100, displaying an obvious light scattering, which is referred to as the haze (Figure d4,d5). , Compared to other ANF films, Film 100 regenerated from the pure ethanol coagulation bath shows the highest haze, indicating that the first coagulation bath has a great effect on the haze property of the regenerated ANF films. Similarly, the haze of ANF hydrogels displays the same changing trends as that of ANF films, suggesting that the haze property of ANF films is decided directly by ANF gels.…”

“…Moreover, Figure b gives a schematic comparison of the light-scattering behavior between Film 0 and Film 100. Generally, the optical property of the films depends on their structure and morphology, indicating that there are obvious differences in the structure and morphology of ANF films regenerated from different coagulation baths. , Thus, the difference in structure and morphology of these ANF films will be investigated and discussed in detail later. In short, the components of the coagulation bath have obvious effects on the haze property of ANF films in this work.…”

“…By regulating the coagulation bath, translucent and anti-ultraviolet ANF films with tunable haze performance were fabricated easily, which can be employed in various fields. , For example, ANF films can be coated on a glass cover of the LED lamp (Figure a). It can be concluded that nine little bulbs are clearly seen from the LED lamp covered with naked glass, whether the light is off or on.…”

Cellulose/Grape-Seed-Extract Composite Films with High Transparency and Ultraviolet Shielding Performance Fabricated from Old Cotton Textiles

“…In our previous work, anti-ultraviolet cellulose-based films including cellulose/aramid nanofibers (ANFs) and cellulose poly (meta-phenylene isophthalamide) (PMIA) were prepared successfully [ 35 , 49 ]. Nevertheless, aramid are synthetic fibers and cellulose/ANFs or cellulose/PMIA films are not completely biodegraded.…”