Natural cassava pulp was selected as a bio-based reinforcement in plastic polymer composites to enhance mechanical and wetting properties as an eco-friendly product. This study developed reinforced polypropylene (PP) composites with cassava pulp (CP) to improve mechanical properties and wetting ability. The PP/CP specimens were fabricated via twin screw extrusion and injection molding. Tensile and flexural testing were performed using a universal testing machine, with wetting properties characterized by a contact angle goniometer. Incorporation of 10 wt% cassava pulp showed enhanced tensile strength (4.85%), Young’s modulus (14.38%) and flexural modulus (23.30%) compared with neat polypropylene, indicating higher stiffness of natural fiber-filled composites. Micropatterns were formed on the composite surfaces using the hot embossing technique. A superhydrophobic surface was achieved by designing micropattern geometry. Water contact angle of micropatterned neat polypropylene and polypropylene/cassava pulp composites increased compared to material with no pattern. Micropatterns on PP/CP composite surfaces can be used to develop new functional materials with high mechanical and superhydrophobic properties.
NithikarnjanatharnJSamsaleeN. Effect of cassava pulp on physical, mechanical, and biodegradable properties of poly(butylene-succinate)-based biocomposites. Alex Eng J2022; 61: 10171–10181. DOI: 10.1016/j.aej.2022.03.052.
2.
DaDjuma’aliNonotSSumarnoS,et al. Cassava pulp as a biofuel feedstock of an enzymatic hydrolysis process. Makara J Technol2011; 15: 183–192.
3.
LerdlattapornRPhalakornkuleCTrakulvicheanS, et al.Implementing circular economy concept by converting cassava pulp and wastewater to biogas for sustainable production in starch industry. Sustain Environ Res2021; 31: 20. DOI: 10.1186/s42834-021-00093-9.
4.
KaeokliangOKawashimaTAngthongW, et al.Chemical composition and nutritive values of cassava pulp for cattle. Anim Sci J2018; 89. DOI: 10.1111/asj.13039.
5.
BunterngsookBLaothanachareonTNatrchalayuthS, et al.Optimization of a minimal synergistic enzyme system for hydrolysis of raw cassava pulp. RSC Adv2017; 7: 48444–48453. DOI: 10.1039/C7RA08472B.
6.
RuangudomsakulWRuksakulpiwatCYupapornR. The study of using bio-filler from cassava pulp in natural rubber composites. Adv Mat Res2013; 747: 371–374. DOI: 10.4028/www.scientific.net/amr.747.371.
7.
JullanunPYoksanR. Morphological characteristics and properties of TPS/PLA/cassava pulp biocomposites. Polym Test2020; 88: 106522. DOI: 10.1016/j.polymertesting.2020.106522.
8.
KimS-JMoonJ-BKimG-H, et al.Mechanical properties of polypropylene/natural fiber composites: Comparison of wood fiber and cotton fiber. Polym Test2008; 27: 801–806. DOI: 10.1016/j.polymertesting.2008.06.002.
9.
HernándezMIchazoMGonzálezJ, et al.Impact behavior of polypropylene/styrene-butadiene-styrene block copolymer blends. Acta Microsc2008; 17: 66–71.
10.
ChakkourMOuld MoussaMKhayI,et al. Towards widespread properties of cellulosic fibers composites: a comprehensive review. J Reinf Plast Compos2022; 0(0): 1–42, doi:10.1177/07316844221112974.
11.
NourbakhshAAshoriA. Fundamental studies on wood–plastic composites: effects of fiber concentration and mixing temperature on the mechanical properties of poplar/PP composite. Polym Compos2008; 29: 569–573. DOI: 10.1002/pc.20578.
Falah ToosiSMoradiSEbrahimiM, et al.Microfabrication of polymeric surfaces with extreme wettability using hot embossing. Appl Surf Sci2016; 378: 426–434. DOI: 10.1016/j.apsusc.2016.03.116.
14.
LimaAManoJF. Micro-/nano-structured superhydrophobic surfaces in the biomedical field: Part I: Basic concepts and biomimetic approaches. Nanomedicine (Lond)2015; 10: 103–119. DOI: 10.2217/nnm.14.174.
15.
WangXFuCZhangC, et al.A comprehensive review of wetting transition mechanism on the surfaces of microstructures from theory and testing methods. Materials (Basel)2022; 15: 2022–2107/28. DOI: 10.3390/ma15144747.
16.
DeshmukhSSGoswamiA. Hot embossing of polymers – A review. Mater Today Proc2020; 26: 405–414. DOI: 10.1016/j.matpr.2019.12.067.
17.
PengLDengYYiP, et al.Micro hot embossing of thermoplastic polymers: a review. J Micromech Microeng2013; 24: 013001. DOI: 10.1088/0960-1317/24/1/013001.
18.
LiWZhaiYYiP, et al.Fabrication of micro-pyramid arrays on PETG films by roll-to-roll hot embossing. Microelectron Eng2016; 164: 100–107. DOI: 10.1016/j.mee.2016.08.001.
19.
SperanzaVLiparotiSCalaonM, et al.Replication of micro and nano-features on iPP by injection molding with fast cavity surface temperature evolution. Mater Des2017; 133: 559–569. DOI: 10.1016/j.matdes.2017.08.016.
20.
MasatoDSorgatoMLucchettaG. Analysis of the influence of part thickness on the replication of micro-structured surfaces by injection molding. Mater Des2016; 95: 219–224. DOI: 10.1016/j.matdes.2016.01.115.
21.
NeboSAliZScottS. Replication of micro-feature using variety of polymer and commonly used mould at elevated temperature and pressure. IOP Conf Ser Mater Sci Eng2012; 40: 2044. DOI: 10.1088/1757-899X/40/1/012044.
22.
ParkS. Injection molding micro patterns with high aspect ratio using a polymeric flexible stamper. Express Polym Lett2011; 5: 950–958. DOI: 10.3144/expresspolymlett.2011.93.
23.
YuC-CChenH-L. Nanoimprint technology for patterning functional materials and its applications. Microelectron Eng2015; 132: 98–119. DOI: 10.1016/j.mee.2014.10.015.
24.
NyströmBJoffeRLångströmR. Microstructure and strength of injection molded natural fiber composites. J Reinf Plast Compos2007; 26: 579–599. DOI: 10.1177/0731684407075536.
MartinezGSanchezSRamosL,et al. Aniline-modified polypropylene as a compatibilizer in polypropylene carbon nanotube composites. Polym Plast Technol Eng2017; 57: 1360–1366, doi:10.1080/03602559.2017.1381251.
28.
KosugiAKondoAUedaM, et al.Production of ethanol from cassava pulp via fermentation with a surface-engineered yeast strain displaying glucoamylase. Renew Energ2009; 34: 1354–1358. DOI: 10.1016/j.renene.2008.09.002.
29.
LalaSDDeoghareABChatterjeeS. Effect of reinforcements on polymer matrix bio-composites – an overview. Sci Eng Compos Mater2018; 25: 1039–1058. DOI: 10.1515/secm-2017-0281.
30.
WangXXuRKangW,et al. Versatile polypropylene copolymers from a pilot-scale spheripol II process. Polymers (Basel)2020; 12: 1–16, doi:10.3390/polym12040751.
31.
HujuriUChattopadhyaySUppaluriR, et al.Effect of maleic anhydride grafted polypropylene on the mechanical and morphological properties of chemically modified short-pineapple-leaf-fiber- reinforced polypropylene composites. J Appl Polym Sci2008; 107: 1507–1516. DOI: 10.1002/app.27156.
32.
OlaniranOOyetunjiAOjiB. Influence of silicon carbide-cassava peel ash weight ratio on the mechanical and tribological characteristics of Al-Mg-Si alloy hybrid composites. J Chem Technol Metall2021; 56(5): 1082–1088.
33.
SrisuwanYBaimarkY. Improvement in thermal stability of flexible poly(L-lactide)-b-poly(ethylene glycol)-b-poly(L-lactide) bioplastic by blending with native cassava starch. Polymers2022; 14: 3186.
34.
TantatherdtamRTranTChotineeranatS, et al.Preparation and characterization of cassava fiber-based polypropylene and polybutylene succinate composites. J Nat Sci2009; 43: 245–251.
35.
LimaACManoJF. Micro-/nano-structured superhydrophobic surfaces in the biomedical field: part I: basic concepts and biomimetic approaches. Nanomedicine (Lond)2015; 10: 103–119. DOI: 10.2217/nnm.14.174.
