ʻO ka cellulose ether (CE) kahi papa o nā derivatives i loaʻa ma ka hoʻololi kemika cellulose. ʻO ka cellulose ka mea nui o nā paia o nā mea kanu, a ʻo ka cellulose ethers he pūʻulu polymers i hana ʻia e ka etherification o kekahi mau pūʻulu hydroxyl (-OH) i loko o ka cellulose. Hoʻohana nui ʻia lākou i nā kula he nui e like me nā mea kūkulu hale, nā lāʻau lapaʻau, nā meaʻai, nā mea hoʻonaninani, a me nā mea ʻē aʻe, a hoʻohana nui ʻia i nā ʻoihana like ʻole ma muli o ko lākou ʻano kino a me nā ʻano kemika a me ka versatility.
1. Ka hoʻokaʻawale ʻana o ka cellulose ethers
Hiki ke hoʻokaʻawale ʻia nā cellulose ethers i nā ʻano like ʻole e like me ke ʻano o nā substituent i loko o ke ʻano kemika. ʻO ka hoʻokaʻawale maʻamau ma muli o ka ʻokoʻa o nā substituent. ʻO nā cellulose ethers maʻamau penei:
Methyl cellulose (MC)
Hoʻokumu ʻia ka Methyl cellulose ma ka hoʻololi ʻana i ka ʻāpana hydroxyl o ka molekele cellulose me ka methyl (–CH₃). Loaʻa iā ia nā waiwai mānoanoa maikaʻi, hana kiʻiʻoniʻoni a hoʻopaʻa ʻia a hoʻohana mau ʻia i nā mea kūkulu hale, nā uhi, nā lāʻau lapaʻau a me nā ʻoihana meaʻai.
Hydroxypropyl methylcellulose (HPMC)
ʻO ka Hydroxypropyl methylcellulose he cellulose ether maʻamau, i hoʻohana nui ʻia i nā mea kūkulu hale, nā lāʻau lapaʻau, nā kemika i kēlā me kēia lā a me nā māla meaʻai ma muli o kona ʻoi aku ka maikaʻi o ka wai a me ka paʻa kemika. ʻO ka HPMC he cellulose ether nonionic me nā waiwai o ka mālama ʻana i ka wai, mānoanoa a paʻa.
Carboxymethyl cellulose (CMC)
ʻO Carboxymethyl cellulose kahi anionic cellulose ether i hana ʻia e ka hoʻokomo ʻana i nā pūʻulu carboxymethyl (-CH₂COOH) i loko o nā molekole cellulose. Loaʻa i ka CMC ka hoʻoheheʻe wai maikaʻi a hoʻohana pinepine ʻia ma ke ʻano he mānoanoa, stabilizer a me ka mea hoʻomaha. He kuleana koʻikoʻi ia i ka meaʻai, ka lāʻau lapaʻau a me nā mea hoʻonaninani.
Ethyl cellulose (EC)
Loaʻa ka Ethyl cellulose ma ka hoʻololi ʻana i ka pūʻulu hydroxyl i cellulose me ka ethyl (–CH₂CH₃). Loaʻa iā ia ka hydrophobicity maikaʻi a hoʻohana pinepine ʻia ma ke ʻano he kiʻi ʻoniʻoni a me nā mea hoʻokuʻu hoʻokuʻu ʻia i ka ʻoihana lāʻau.
2. Ka waiwai kino a me ke kemika o ka cellulose ethers
ʻO nāʻano kino a me nā kinona o ka cellulose ethers e pili kokoke ana i nā mea e like me keʻano o ka cellulose ether, keʻano o ka mea pani a me ke kiʻekiʻe o ka hoʻololi. ʻO kāna mau waiwai nui e like me kēia:
Ka wai a me ka hoʻoheheʻe
ʻO ka hapa nui o nā cellulose ethers he mea hiki ke hoʻoheheʻe ʻia i ka wai anuanu a i ʻole ka wai wela e hana i kahi hopena colloidal maopopo. No ka laʻana, hiki ke hoʻoheheʻe koke ʻia ka HPMC, CMC, a me nā mea ʻē aʻe i loko o ka wai e hana i kahi hopena kiʻekiʻe-viscosity, i hoʻohana nui ʻia i nā hiʻohiʻona noiʻi me nā koi hana e like me ka mānoanoa, ka hoʻokuʻu ʻana, a me ka hoʻokumu ʻana i ke kiʻiʻoniʻoni.
Nā waiwai mānoanoa a hana kiʻiʻoniʻoni
Loaʻa i nā cellulose ethers nā waiwai mānoanoa maikaʻi loa a hiki ke hoʻonui pono i ka viscosity o nā hoʻonā wai. No ka laʻana, hiki i ka hoʻohui ʻana i ka HPMC i nā mea kūkulu hale ke hoʻomaikaʻi i ka plasticity a me ka hana o ka mortar a hoʻonui i nā waiwai anti-sagging. I ka manawa like, loaʻa i nā cellulose ethers nā mea hana kiʻiʻoniʻoni maikaʻi a hiki ke hana i kahi kiʻiʻoniʻoni pale like ʻole ma ka ʻili o nā mea, no laila ua hoʻohana nui ʻia lākou i nā pale a me nā lāʻau lapaʻau.
Paʻa wai a kūpaʻa
Loaʻa i nā cellulose ethers ka hiki ke mālama i ka wai, ʻoi aku ka maikaʻi ma ke kahua o nā mea kūkulu hale. Hoʻohana pinepine ʻia nā cellulose ethers e hoʻomaikaʻi i ka paʻa ʻana o ka wai o ka mortar sima, e hōʻemi i ka hiki ʻana mai o ka mortar shrinkage māwae, a hoʻonui i ke ola lawelawe o ka mortar. Ma ke kahua meaʻai, hoʻohana ʻia ʻo CMC ma ke ʻano he humectant e hoʻopaneʻe i ka maloʻo ʻana o ka meaʻai.
Paʻa kemika
Hōʻike nā cellulose ethers i ke kūpaʻa kemika maikaʻi i ka waika, alkali a me nā hopena electrolyte, a hiki ke mālama i ko lākou ʻano a me ka hana i loko o nā ʻano kemika paʻakikī. ʻAe kēia iā lākou e hoʻohana ʻia i nā ʻoihana like ʻole me ka ʻole o ke keakea ʻana mai nā kemika ʻē aʻe.
3. Ke kaʻina hana o ka cellulose ether
Hoʻomākaukau nui ʻia ka hana ʻana o ka cellulose ether e ka hopena etherification o ka cellulose maoli. ʻO nā kaʻina hana maʻamau ka mālama ʻana i ka alkalization o cellulose, etherification reaction, hoʻomaʻemaʻe, etc.
Lapaʻau alkalina
ʻO ka mua, ʻo ka cellulose maoli (e like me ka pulupulu, ka lāʻau, a me nā mea ʻē aʻe) i alkalized e hoʻololi i ka ʻāpana hydroxyl i cellulose i loko o nā paʻakai ʻawaʻawa ikaika loa.
Ka hoʻoheheʻe ʻana
Hoʻopili ka cellulose ma hope o ka alkalization me kahi mea etherifying (e like me ka methyl chloride, propylene oxide, a me nā mea ʻē aʻe) e hana i ka cellulose ether. Ma muli o nā kūlana hopena, hiki ke loaʻa nā ʻano like ʻole o ka cellulose ethers.
Hoʻomaʻemaʻe a maloʻo
Hoʻomaʻemaʻe ʻia ka cellulose ether i hana ʻia e ka hopena, holoi ʻia a maloʻo no ka loaʻa ʻana o ka pauka a i ʻole ka huahana granular. Hiki ke hoʻomaluʻia ka maʻemaʻe a me ke kino o ka huahana hope e kaʻenehana hana hope.
4. Nā kahua noi o cellulose ether
Ma muli o nā waiwai kino a me nā kemika o cellulose ethers, hoʻohana nui ʻia lākou i nā ʻoihana he nui. ʻO nā kahua noi nui penei:
Nā mea kūkulu hale
Ma ke kahua o nā mea kūkulu hale, hoʻohana nui ʻia nā cellulose ethers e like me nā mānoanoa a me nā mea mālama wai no ka mortar sima a me nā huahana gypsum. Hiki i nā cellulose ethers e like me HPMC a me MC ke hoʻomaikaʻi i ka hana ʻana o ka mortar, hoʻemi i ka nalowale o ka wai, a pēlā e hoʻomaikaʻi ai i ka adhesion a me ka pale ʻana.
Laau lapaau
I ka ʻoihana lāʻau lapaʻau, hoʻohana nui ʻia nā cellulose ethers e like me nā mea hoʻopili no nā lāʻau lapaʻau, adhesives no nā papa, a me nā mea hoʻokuʻu hoʻokuʻu ʻia. No ka laʻana, hoʻohana pinepine ʻia ka HPMC no ka hoʻomākaukau ʻana i nā pale kiʻi lāʻau lapaʻau a loaʻa ka hopena hoʻokuʻu hoʻomalu maikaʻi.
Meaʻai
Hoʻohana pinepine ʻia ʻo CMC ma ke ʻano he mānoanoa, emulsifier, a me ka stabilizer i ka ʻoihana meaʻai. Hoʻohana nui ʻia ia i nā mea inu, nā huahana waiu, a me nā mea i kālua ʻia, a hiki ke hoʻomaikaʻi i ka ʻono a me ka moisturizing waiwai o ka meaʻai.
ʻO nā mea hoʻonaninani a me nā kemika o kēlā me kēia lā
Hoʻohana ʻia nā cellulose ethers e like me nā mānoanoa a me nā emulsifiers a me nā stabilizers i nā mea hoʻonaninani a me nā kemika i kēlā me kēia lā, hiki ke hāʻawi i ka kūlike a me ke ʻano. No ka laʻana, hoʻohana pinepine ʻia ka HPMC i nā huahana e like me ka toothpaste a me ka shampoo e hāʻawi iā lākou i kahi manaʻo viscous a me kahi hopena hoʻomaha paʻa.
Nā uhi
I loko o ka ʻoihana uhi, hoʻohana ʻia nā cellulose ethers e like me nā mānoanoa, nā mea hana kiʻiʻoniʻoni, a me nā mea suspending agents, hiki ke hoʻonui i ka hana o ke kūkulu ʻana i nā uhi, hoʻomaikaʻi i ka pae, a hāʻawi i ka maikaʻi o ka kiʻi pena.
5. Ka hoʻomohala ʻana o ka cellulose ethers i ka wā e hiki mai ana
Me ka piʻi nui ʻana o ka noi no ka mālama ʻana i ke kaiapuni, cellulose ether, ma ke ʻano he derivative o nā kumuwaiwai kūlohelohe, loaʻa nā manaʻo hoʻomohala ākea. ʻO kona biodegradability, renewability a me versatility e manaʻo ʻia e hoʻohana nui ʻia i nā kula o nā mea ʻōmaʻomaʻo, nā mea degradable a me nā mea akamai i ka wā e hiki mai ana. Eia kekahi, loaʻa hou i ka cellulose ether ka noiʻi a me ka hoʻomohala ʻana i nā kula kiʻekiʻe e like me ka biomedical engineering a me nā mea holomua.
Ma ke ʻano he huahana kemika koʻikoʻi, ʻo ka cellulose ether ka nui o ka waiwai noi. Me kona mānoanoa maikaʻi loa, ka paʻa ʻana o ka wai, ka hana kiʻiʻoniʻoni a me ke kūpaʻa kemika maikaʻi, hoʻokani ʻo ia i kahi hana hiki ʻole ke hoʻololi ʻia i nā kula he nui e like me ke kūkulu ʻana, ka lāʻau lapaʻau, a me ka meaʻai. I ka wā e hiki mai ana, me ka hoʻomau mau ʻana o ka ʻenehana a me ka hoʻolaha ʻana i nā manaʻo palekana kaiapuni, e ʻoi aku ka laulā o ka noi ʻana o ka cellulose ether a hāʻawi i nā haʻawina nui i ka hoʻolaha ʻana i ka hoʻomohala hoʻomau o nā ʻoihana like ʻole.
Ka manawa hoʻouna: Sep-24-2024