Combination of atom transfer radical polymerization and click chemistry toward cellulose-rosin derived UV-absorbent copo
- PDF / 1,940,334 Bytes
- 9 Pages / 595.276 x 790.866 pts Page_size
- 67 Downloads / 175 Views
ORIGINAL RESEARCH
Combination of atom transfer radical polymerization and click chemistry toward cellulose‑rosin derived UV‑absorbent copolymers Chuanwei Lu1,2,3 · Yuling Qiu1,2 · Xiaoliang Guo1,2 · Chunpeng Wang1,2,3 · Jifu Wang1,2,3 · Fuxiang Chu1,2,3 Received: 18 May 2020 / Accepted: 2 August 2020 © Iran Polymer and Petrochemical Institute 2020
Abstract UV absorption coating is an important function material, which can protect the substrates from photoaging. In this work, a class of sustainable UV-absorbent copolymers derived from ethyl cellulose (EC), fatty acid and rosin were prepared by a combination of atom transfer radical polymerization (ATRP) and click chemistry. To fulfill this strategy, the pendant azides were first attached onto the backbone of EC. Then, ATRP was applied to fabricate well-defined poly(lauryl methacrylate) (PLMA) bearing terminal alkynes. Finally, click chemistry between the pendant azides in EC and the alkynes in PLMA as well as in rosin esters (DAPE), was performed to achieve the cellulose-rosin graft copolymers (EC-(g-DAPE)-g-PLMA) with UV absorption property. The chemical structure of cellulose-rosin graft copolymers was confirmed by FTIR, 1H NMR and GPC. Thermodynamic performance analysis indicated that these EC-rosin graft copolymers showed better thermal stability than EC. Due to the synergistic hydrophobic interaction of rosin and the hydrophobic lauryl groups in PLMA, these graft copolymers showed excellent hydrophobic property, and the static contact angles were all above 90°. In addition, all the EC-rosin graft copolymers showed outstanding and stable UV absorption capability, and maintained excellent UV absorption capability after continuous UV-irradiation for 1 h or being heated to 100 °C for 0.5 h, which had potential application in UV absorption materials. Keywords Cellulose · Rosin · ATRP · Click chemistry · UV-absorption
Introduction With the increasing concern on depletion of fossil oil and environment pollution, the demand for preparing sustainable materials has driven biomass research to a new level. It has been increasingly recognized that the utilization biomass resource could enhance sustainability, reduce carbon emissions, and curtail the undesirable impact on environment
* Jifu Wang [email protected] 1
Institute of Chemical Industry of Forest Products, CAF, National Engineering Lab. for Biomass Chemical Utilization, Key and Open Lab. of Forest Chemical Engineering, SFA, Key Lab. of Biomass Energy and Material, Nanjing 210042, Jiangsu, China
2
Institute of Forest New Technology, CAF, No 1, Dongxiaofu Haidian, Beijing 100091, China
3
Co‑Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
[1–3]. A variety of biomass resources such as cellulose, lignin, fatty acid, furfural, rosin, starch, etc., have been reported to prepare functional polymers [4–6]. Cellulose is the most abundant biomass resource consisting of a linear chain of several hundred to over ten thousand β(1–
Data Loading...
