Funding for this research was provided by:
National Natural Science Foundation of China (31470607)
the open-funds of state key laboratory of Pulp and Paper Engineering of SCUT (201320)
Natural Science Foundation of Guangdong Province (2015A0303)
Guangzhou Science and Technology Planning Project (201607020025)
Article History
Received: 6 August 2019
First Online: 17 December 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.