Abstract
A simple and versatile route for industrial scale synthesis of adipicdihydrazide (ADH)/polymer hybrids with excellent performance of formaldehyde degradation is proposed in this paper. The ADH compound is uniformly dispersed in poly(methyl methacrylate-butyl acrylate-methacrylic acid) (P(MMA-BA-MAA)) latex, which is validated by UV and dispersibility tests. The results illustrate that ADH has excellent compatibility and dispersion stability without affecting the film formation of the polymer latex. Furthermore, scanning electron microscope (SEM) and mapping analysis of the hybrid films also demonstrate that ADH is homogenously dispersed in the polymer matrix. Compared with neat polymers, the thermal properties of hybrid films are improved, for example, T0.5 increases by 8.3 °C. According to qualitative tests of the 4-amino-3-hydrazino-5-mercapto-1,2,4-triazol-red/green/blue (AHMT-RGB) method, the hybrid films demonstrate high formaldehyde removal efficiency. On the basis of the semi-quantitative test of Fourier Transform infrared spectroscopy (FTIR) measurements, the rate of formaldehyde degradation can reach 1.034 × 102 mol/(h·m3) for the hybrid film with 5 wt% ADH.
Highlights
Formaldehyde, characterized by its chemical reactivity and quality, as well as competitive price, is an important precursor material that is widely used in organic synthesis processes
The results showed that the rate of formaldehyde removal by the Ag-activated carbon (AC)
The results indicated that the formaldehyde was removed more completely by tea polyphenol with higher pH, higher reaction temperature, and longer reaction time
Summary
Formaldehyde, characterized by its chemical reactivity and quality, as well as competitive price, is an important precursor material that is widely used in organic synthesis processes. With increased improvement in living conditions, a premium is imposed on the importance of a healthy environment, including the level of indoor free formaldehyde [6,7,8,9,10]. Degradation of free formaldehyde in habitable spaces is of great significance. There are various technologies for degrading unbound formaldehyde, including physical adsorption [11], catalytic oxidation [12], and chemical reactions [13]. Physical adsorption is the most common method to remove aldehydes in industry, where formaldehyde is fixed on the adsorbent surface by van der Waals force. Renggaa et al [14] investigated the performance of silver nanoparticles adsorbed in bamboo based activated carbon (Ag-AC) using a continuous fixed-bed reactor for Polymers 2019, 11, 86; doi:10.3390/polym11010086 www.mdpi.com/journal/polymers
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