He aha ka ʻokoʻa ma waena o HEC a me CMC?

ʻO HEC a me CMC nāʻanoʻelua o ka cellulose ether, he polysaccharide i loaʻa i nā mea kanu a hoʻohanaʻia i nā huahana likeʻole. ʻOiai ua loaʻa nā mea ʻelua mai ka cellulose, loaʻa iā lākou nā waiwai a me nā noi.

HEC, a i ole hydroxyethyl cellulose, he non-ionic, wai-soluble polymer i loaa mai ka cellulose. Hoʻohana ʻia ʻo ia ma ke ʻano he mea mānoanoa, emulsifier, stabilizer, a me ka suspending agent i nā ʻano huahana like ʻole, me nā mea hoʻonaninani, nā lāʻau lapaʻau, a me nā huahana meaʻai. Hoʻohana pū ʻia ʻo HEC e hoʻonui i ka viscosity o nā ʻano wai a hoʻomaikaʻi i ke ʻano o nā huahana. Hoʻohana ʻia ia i ka hana ʻana i ka pepa, pena, a me nā mea hoʻopili.

ʻO CMC, a i ʻole carboxymethyl cellulose, he polymer hiki ke hoʻoheheʻe ʻia i ka wai i loaʻa mai ka cellulose. Hoʻohana ʻia ʻo ia ma ke ʻano he mea mānoanoa, emulsifier, stabilizer, a me ka suspending agent i nā ʻano huahana like ʻole, me nā mea hoʻonaninani, nā lāʻau lapaʻau, a me nā huahana meaʻai. Hoʻohana ʻia ʻo CMC e hoʻonui i ka viscosity o nā ʻano wai a hoʻomaikaʻi i ke ʻano o nā huahana. Hoʻohana ʻia ia i ka hana ʻana i ka pepa, pena, a me nā mea hoʻopili.

ʻO ka ʻokoʻa nui ma waena o HEC a me CMC aia i ko lākou ʻano kemika. He polymer non-ionic ʻo HEC, ʻo ia hoʻi, ʻaʻohe ona koina e pili ana me ia. ʻO CMC, ma ka ʻaoʻao ʻē aʻe, he polymer ionic, ʻo ia hoʻi he kumu kūʻai maikaʻi ʻole e pili ana me ia. Hoʻopili kēia ʻokoʻa i ke ʻano o ka hui ʻana o nā polymers ʻelua me nā molekole ʻē aʻe, a pēlā e pili ai i kā lākou mau waiwai a me nā noi.

He ʻoi aku ka hoʻoheheʻe ʻana o ka HEC i ka wai ma mua o ka CMC, a ʻoi aku ka maikaʻi ma ke ʻano he mea mānoanoa. ʻOi aku ka paʻa i ka ʻakika a me ka alkaline, a ʻoi aku ke kūpaʻa i ka wela a me ka māmā. ʻOi aku ka maikaʻi o ka HEC i ka microbial degradation, e hoʻolilo iā ia i koho maikaʻi loa no nā huahana e koi ana i kahi ola lōʻihi.

ʻAʻole hiki ke hoʻoheheʻe ʻia ka CMC i ka wai ma mua o ka HEC, a ʻoi aku ka maikaʻi ma ke ʻano he mea mānoanoa. ʻAʻole paʻa ka paʻa i ka ʻakika a me ka alkaline, a ʻaʻole i kū i ka wela a me ka māmā. ʻOi aku ka maʻalahi o ka CMC i ka microbial degradation, e lilo ia i koho kūpono ʻole no nā huahana e koi ana i kahi ola lōʻihi.

I ka hopena, ʻo HEC a me CMC nā ʻano ʻelua o ka cellulose ether me nā waiwai a me nā noi. ʻOi aku ka hoʻoheheʻe ʻana o ka HEC i ka wai a ʻoi aku ka maikaʻi ma ke ʻano he mea mānoanoa, ʻoiai ʻoi aku ka liʻiliʻi o ka CMC i ka wai a ʻoi aku ka maikaʻi ma ke ʻano he mea mānoanoa. ʻOi aku ka paʻa o ka HEC i nā hopena ʻakika a me ka alkaline, a ʻoi aku ke kūpaʻa i ka wela a me ka māmā. ʻAʻole paʻa ka CMC i nā hopena ʻakika a me ka alkaline, a ʻaʻole kū i ka wela a me ka māmā. Loaʻa nā polymers ʻelua i nā noi like ʻole i ka hana ʻana i nā mea hoʻonaninani, nā lāʻau lapaʻau, nā huahana meaʻai, pepa, pena, a me nā mea hoʻopili.