He aha ka pH kūpaʻa o ka hydroxyethylcellulose?

ʻO ka Hydroxyethylcellulose (HEC) he polymer wai-soluble i hoʻohana nui ʻia i nā noi like ʻole e like me nā adhesives, coatings, a me nā huahana mālama pilikino. ʻO ka paʻa pH o HEC e pili ana i nā kumu he nui, me ka helu kikoʻī o HEC, ka pae pH o ka noi, a me ka lōʻihi o ka ʻike ʻana i ka pH environment.

Paʻa mau ʻo HEC i loko o kahi pae pH o 2-12, e uhi ana i kahi ākea ākea o nā kūlana ʻakika a i ka alkaline. Eia nō naʻe, ʻo ka hoʻolōʻihi ʻia ʻana i nā kūlana pH koʻikoʻi hiki ke hoʻohaʻahaʻa i ka HEC, ka hopena i ka nalowale o kāna mau waiwai mānoanoa a hoʻopaʻa.

Ma nā waiwai pH acidic, ma lalo o ka pH o 2, hiki i ka HEC ke hana i ka hydrolysis, e alakaʻi ana i ka emi ʻana o ke kaumaha molekala a me ka emi ʻana o ka viscosity. Ma nā koina pH alkaline kiʻekiʻe loa, ma luna o ka pH 12, hiki i ka HEC ke hana i ka hydrolysis alkaline, e alakaʻi ana i ka nalowale o kāna mau waiwai mānoanoa a paʻa.

Hiki ke hoʻopili ʻia ka paʻa o ka pH o HEC e ka loaʻa ʻana o nā kemika ʻē aʻe i ka hoʻokumu ʻana, e like me nā paʻakai a i ʻole surfactants, hiki ke hoʻopilikia i ka pH a me ka ikaika ionic o ka hopena. I kekahi mau hihia, pono ka hoʻohui ʻana i ka waikawa a i ʻole ke kumu no ka hoʻoponopono ʻana i ka pH a mālama i ka paʻa o ka hopena HEC.

Ma keʻano holoʻokoʻa, paʻa ka HEC i loko o kahi ākea pH ākea, akā he mea nui e noʻonoʻo i ka noi kikoʻī a me nā kūlana hoʻolālā e hōʻoia i ka mālama ʻana o ka HEC i kāna mau waiwai i makemake ʻia i ka manawa.