ʻO ka hanana o ka hāʻule ʻana o ka mānoanoa i ka wā e mālama ai i ka pena he pilikia maʻamau, ʻoiai ma hope o ka mālama ʻana i ka wā lōʻihi, e emi nui ana ka mānoanoa o ka pena, e hoʻopilikia ana i ka hana kūkulu a me ka maikaʻi o ka huahana. Pili ka emi ʻana o ka mānoanoa i nā kumu he nui, e like me ka mahana, ka haʻahaʻa, ka volatilization o ka solvent, ka hoʻohaʻahaʻa ʻana o ka polymer, a pēlā aku, akā he mea koʻikoʻi loa ka launa pū ʻana me ka thickener cellulose ether.
1. Ke kuleana kumu o ka cellulose ether
He mea hoʻomānoanoa maʻamau ka Cellulose ether i hoʻohana nui ʻia i nā pena wai. ʻO kā lākou mau hana nui:
Hopena mānoanoa: Hiki i ka Cellulose ether ke hana i kahi ʻano pūnaewele ʻekolu-dimensional pehu ma o ka omo ʻana i ka wai, a laila e hoʻonui ai i ka viscosity o ka ʻōnaehana a hoʻomaikaʻi i ka thixotropy a me ka hana kūkulu o ka pena.
Ka hopena hoʻopaʻa hoʻomaha: Hiki i ka Cellulose ether ke pale pono i ka sedimentation o nā ʻāpana paʻa e like me nā pigments a me nā mea hoʻopihapiha i ka pena a mālama i ke ʻano like o ka pena.
ʻO ka waiwai hana kiʻiʻoniʻoni: Hiki i ka Cellulose ether ke hoʻopilikia i ka waiwai hana kiʻiʻoniʻoni o ka pena, e hana ana i ka uhi i kahi paʻakikī a me ke kūpaʻa.
Nui nā ʻano o nā ethers cellulose, me ka methyl cellulose (MC), hydroxyethyl cellulose (HEC), hydroxypropyl methyl cellulose (HPMC), a me nā mea ʻē aʻe. He ʻokoʻa ka solubility o kēia mau mea, ka hiki ke mānoanoa a me ke kūpaʻa mālama ʻana i nā uhi.
2. Nā kumu nui no ka hōʻemi ʻana i ka mānoanoa
I ka wā e mālama ai i nā uhi, ʻo ka emi ʻana o ka viscosity ke kumu nui ʻia e nā kumu penei:
(1) Ka hōʻino ʻana o nā ethers cellulose
ʻO ka hopena mānoanoa o nā ethers cellulose i loko o nā uhi e pili ana i ka nui o ko lākou kaumaha molekala a me ke kūpaʻa o ko lākou ʻano molekala. I ka wā e mālama ai, hiki i nā mea e like me ka mahana, ka acidity a me ka alkalinity, a me nā microorganism ke hana i ka hōʻino ʻana o nā ethers cellulose. No ka laʻana, i ka wā e mālama ai i ka wā lōʻihi, hiki i nā ʻāpana acidic a alkaline paha i loko o ka uhi ke hydrolyze i ke kaulahao molekala o ka cellulose ether, e hoʻemi i kona kaumaha molekala, a pēlā e hoʻonāwaliwali ai i kona hopena mānoanoa, e hopena ana i ka emi ʻana o ka viscosity.
(2) Ka hoʻoheheʻe ʻana o ka mea hoʻoheheʻe a me ka neʻe ʻana o ka makū
ʻO ka volatilization solvent a i ʻole ka neʻe ʻana o ka makū i loko o ka uhi e hoʻopilikia paha i ke kūlana solubility o ka cellulose ether. I ka wā e mālama ai, hiki i kahi hapa o ka wai ke mahu a neʻe paha i ka ʻili o ka uhi, e hana ana i ka hoʻolaha ʻana o ka wai i loko o ka uhi i like ʻole, a laila e hoʻopilikia ana i ke kekelē pehu o ka cellulose ether a e hoʻemi ana i ka viscosity ma nā wahi kūloko.
(3) Hoʻouka kaua microbial
Hiki ke ulu ka microbial i loko o ka uhi ke mālama pono ʻole ʻia a i ʻole lilo nā mea mālama i mea pono ʻole. Hiki i nā microorganism ke hoʻopau i nā cellulose ethers a me nā mea hoʻomānoanoa organik ʻē aʻe, e hoʻonāwaliwali ana i ko lākou hopena mānoanoa a e hoʻemi ana i ka viscosity o ka uhi. ʻO nā uhi wai, ʻoi aku hoʻi, he wahi maikaʻi ia no ka ulu ʻana o nā microbial no ka mea he nui ka wai i loko o lākou.
(4) Ka ʻelemakule ʻana o ke ana wela kiʻekiʻe
Ma lalo o nā kūlana mālama wela kiʻekiʻe, hiki ke loli ke ʻano kino a kemika paha o ke kaulahao molekala cellulose ether. No ka laʻana, ua maʻalahi nā cellulose ethers i ka oxidation a i ʻole pyrolysis i nā mahana kiʻekiʻe, e hopena ana i ka nāwaliwali o ka hopena mānoanoa. Hoʻolalelale pū nā mahana kiʻekiʻe i ka volatilization solvent a me ka mahu wai, e hoʻopilikia hou ana i ke kūpaʻa o ka viscosity.
3. Nā ʻano hana e hoʻomaikaʻi ai i ke kūpaʻa o ka mālama ʻana o nā uhi
I mea e hōʻemi ai i ka emi ʻana o ka viscosity i ka wā e mālama ai a hoʻolōʻihi i ke ola mālama o ka uhi ʻana, hiki ke hana ʻia nā hana aʻe:
(1) Ke koho ʻana i ka cellulose ether kūpono
He ʻokoʻa nā hana o nā ʻano cellulose ethers like ʻole e pili ana i ke kūpaʻa o ka mālama ʻana. ʻOi aku ka maikaʻi o nā hopena mānoanoa o nā cellulose ethers me ke kaumaha molekala kiʻekiʻe, akā ʻoi aku ka maikaʻi o ko lākou kūpaʻa mālama ʻana, ʻoiai ʻoi aku ka maikaʻi o ka hana mālama ʻana o nā cellulose ethers me ke kaumaha molekala haʻahaʻa. No laila, i ka hoʻolālā ʻana i ke ʻano, pono e koho ʻia nā cellulose ethers me ke kūpaʻa mālama maikaʻi, a i ʻole e hoʻohui ʻia nā cellulose ethers me nā mea mānoanoa ʻē aʻe e hoʻomaikaʻi i ko lākou kūpaʻa mālama ʻana.
(2) E kāohi i ka pH o ka uhi ʻana
He mana koʻikoʻi ko ka ʻakika a me ka alkalinity o ka ʻōnaehana uhi i ke kūpaʻa o nā cellulose ethers. I ka hoʻolālā ʻana o ka hoʻohuihui ʻana, pono e hoʻomalu ʻia ka waiwai pH o ka uhi ʻana e pale aku i kahi ʻano waikawa a alkaline paha e hōʻemi i ka hōʻino ʻana o nā cellulose ethers. I ka manawa like, ʻo ka hoʻohui ʻana i kahi nui kūpono o ka mea hoʻoponopono pH a i ʻole buffer hiki ke kōkua i ka hoʻopaʻa ʻana i ka pH o ka ʻōnaehana.
(3) Hoʻonui i ka hoʻohana ʻana i nā mea hoʻomalu
I mea e pale ai i ka ʻino ʻana o nā microbial, pono e hoʻohui ʻia kahi nui kūpono o nā mea mālama i ka uhi. Hiki i nā mea mālama ke kāohi i ka ulu ʻana o nā microorganism, a laila e pale ai i nā mea olaola e like me ka cellulose ether mai ka palaho ʻana a mālama i ke kūpaʻa o ka uhi. Pono e koho ʻia nā mea mālama kūpono e like me ke ʻano o ka uhi a me ke kaiapuni mālama, a pono e nānā pinepine ʻia ko lākou pono.
(4) E kāohi i ke kaiapuni mālama
ʻO ka mahana mālama a me ka makū o ka uhi ʻana he hopena pololei ia i ke kūpaʻa o ka viscosity. Pono e mālama ʻia ka uhi ʻana i kahi maloʻo a me ke anuanu, e pale ana i nā kūlana wela kiʻekiʻe a me ka makū kiʻekiʻe e hōʻemi i ka volatilization solvent a me ka cellulose ether degradation. Eia kekahi, hiki i ka ʻōpala i hoʻopaʻa pono ʻia ke hōʻemi pono i ka neʻe ʻana a me ka mahu ʻana o ka wai a hoʻopaneʻe i ka emi ʻana o ka viscosity.
4. Nā kumu ʻē aʻe e pili ana i ka mānoanoa
Ma waho aʻe o nā ethers cellulose, hiki i nā ʻāpana ʻē aʻe i loko o ka ʻōnaehana uhi ke hoʻopilikia i ka loli o ka viscosity. No ka laʻana, ʻo ke ʻano a me ka nui o nā pigments, ka nui o ka volatilization o nā solvents, a me ka kūlike o nā thickeners a i ʻole dispersants ʻē aʻe e hoʻopilikia i ka paʻa o ka viscosity o ka uhi. No laila, ʻo ka hoʻolālā holoʻokoʻa o ke ʻano uhi a me ka launa pū ʻana ma waena o nā ʻāpana he mau mea nui hoʻi e pono e makaʻala ʻia.
ʻO ka emi ʻana o ka viscosity i ka wā e mālama ai i ka uhi ʻana e pili pono ana i nā mea e like me ka hōʻino ʻana o nā cellulose ethers, ka volatilization solvent, a me ka neʻe ʻana o ka wai. I mea e hoʻomaikaʻi ai i ke kūpaʻa o ka mālama ʻana o ka uhi ʻana, pono e koho ʻia nā ʻano cellulose ether kūpono, pono e kāohi ʻia ka pH o ka uhi ʻana, pono e hoʻoikaika ʻia nā hana anti-corrosion, a pono e hoʻomaikaʻi ʻia ke kaiapuni mālama. Ma o ka hoʻolālā kūpono o ke ʻano hana a me ka hoʻokele mālama maikaʻi, hiki ke hoʻemi pono ʻia ka pilikia o ka emi ʻana o ka viscosity i ka wā e mālama ai i ka uhi ʻana, a hiki ke hoʻomaikaʻi ʻia ka hana o ka huahana a me ka hoʻokūkū mākeke.
Ka manawa hoʻouna: Sep-27-2024