Hydroxyethylcellulose(HEC) he polymer maʻamau e ʻike i nā noi ākea ma waena o nā ʻoihana like ʻole ma muli o kāna mau waiwai kūʻokoʻa. Loaʻa mai ka cellulose, kekahi o nā polymers kūlohelohe nui loa, ua loaʻa i ka HEC ka nānā nui ʻana no kona ʻano wai-solubility, non-ionic, a me ka hiki ke hana i nā hopena viscoelastic. Ke ʻimi nei kēia alakaʻi holoʻokoʻa i ke ʻano, nā waiwai, synthesis, nā noi, a me nā hoʻomohala e hiki mai ana o hydroxyethylcellulose.

ʻO ke ʻano a me nā ʻano o ka Hydroxyethylcellulose:

He kumu ia o ka cellulose, he polysaccharide linear i haku ʻia me nā ʻāpana glucose hou i hoʻopili ʻia e nā paʻa β(1→4) glycosidic. ʻO nā pūʻulu hydroxyl (-OH) ma ke kuamoʻo cellulose e hāʻawi i nā wahi no ka hoʻololi kemika, e alakaʻi ana i ka hana ʻana i nā ʻano derivative cellulose e like me HEC. I ka hihia o HEC, hoʻokomo ʻia nā hui hydroxyethyl (-CH2CH2OH) i ka iwi kuamoʻo cellulose ma o nā hopena etherification.

ʻO ke kiʻekiʻe o ka hoʻololi ʻana (DS), e pili ana i ka helu awelika o nā pūʻulu hydroxyethyl i kēlā me kēia ʻāpana anhydroglucose, hoʻololi i nā waiwai o HEC. ʻO nā waiwai DS kiʻekiʻe ka hopena i ka hoʻonui ʻana i ka solubility i ka wai a me ka hoʻohaʻahaʻa ʻana i ka hana ʻana i nā gels. He kuleana koʻikoʻi nō hoʻi ke kaumaha molekala i ka hoʻoholo ʻana i nā waiwai rheological o HEC, me nā polymers kaumaha molecular kiʻekiʻe e hōʻike pinepine ana i ka ʻoi aku o ka mānoanoa.

Hōʻike ka HEC i ka wai-solubility kupaianaha, e hoʻohana nui ʻia i nā ʻano wai. Ke hoʻoheheʻe ʻia i loko o ka wai, hana ʻo HEC i nā ʻoluʻolu a me ka waihoʻoluʻu ʻole me ka ʻano pseudoplastic, ʻo ia hoʻi ke emi nei ka viscosity me ka piʻi ʻana o ka shear rate. Makemake ʻia kēia ʻano rheological i nā noi he nui, no ka mea hiki ke hoʻohana maʻalahi a hoʻolaha i nā huahana HEC.

Hoʻohui ʻia o ka Hydroxyethylcellulose:

Hoʻopili ka synthesis o HEC i ka hopena o ka cellulose me ka ethylene oxide i mua o nā catalysts alkali ma lalo o nā kūlana hoʻomalu. Hana ʻia ke kaʻina hana i loko o kahi ʻano wai i nā mahana kiʻekiʻe, a hiki ke hoʻomalu ʻia ka nui o ka etherification ma ka hoʻoponopono ʻana i nā ʻāpana hoʻohālikelike e like me ka mahana, ka manawa pane, a me ka ratio o ka cellulose i ka ethylene oxide.

Ma hope o ka hopena, hoʻomaʻemaʻe pinepine ʻia ka hydroxyethylcellulose e hoʻoneʻe i nā haumia a me nā reagents i hoʻokō ʻole ʻia. Hiki i nā ʻano hoʻomaʻemaʻe ke komo i ka ua, kānana, holoi, a me nā ʻanuʻu maloʻo e loaʻa ai ka huahana hope ma ke ʻano makemake, e like me ka pauka a i ʻole granules.

Nā noi no ka Hydroxyethylcellulose:

1. Nā huahana mālama pilikino: Hoʻohana nui ʻia ʻo HEC i ka ʻoihana mālama pilikino no kona mānoanoa, hoʻopaʻa, a me nā waiwai hana kiʻiʻoniʻoni. Hiki ke loaʻa iā ia i loko o nā huahana like ʻole, me nā shampoos, conditioners, holoi kino, creams, lotions, a me nā gels. I loko o kēia mau hana, hoʻonui ʻo HEC i ka viscosity, hoʻomaikaʻi i ke ʻano huahana, a hoʻopaʻa i nā emulsions.
2. ʻO nā lāʻau lapaʻau: Ma ka ʻoihana lāʻau lapaʻau, lawelawe ʻo HEC ma ke ʻano he mea kōkua nui i ka hoʻokumu ʻana i ka papa, kahi e hana ai ma ke ʻano he mea hoʻopaʻa, disintegrant, a i ʻole nā ​​​​mea hoʻokuʻu hoʻokuʻu. ʻO kona hiki ke hana i nā hāʻina akaka, kala ʻole, kūpono ia no ka hoʻohana ʻana i nā hoʻonā waha, hoʻokuʻu, a me nā hoʻomākaukau ophthalmic. Hoʻohui ʻia, hoʻohana ʻia ʻo HEC i nā ʻano kumuhana e like me ka ʻaila a me nā gels no kāna mau waiwai rheological a me ka biocompatibility.
3. ʻOihana Meaʻai: Hoʻohana ʻia ʻo HEC i ka ʻoihana meaʻai ma ke ʻano he mānoanoa, stabilizer, a me ka emulsifier i nā huahana like ʻole, me nā ʻuala, nā lole, nā huahana dairy, a me nā mea inu. Kōkua ia i ka hoʻomaikaʻi ʻana i ke ʻano, pale i ka syneresis, a me ka hoʻomaikaʻi ʻana i ka waha i nā meaʻai. ʻO ka launa pū ʻana o HEC me kahi ākea o nā meaʻai meaʻai a me kona hiki ke kū i nā kūlana kaʻina hana i koho maikaʻi ʻia no nā mea hana meaʻai.
4. Nā Pena a me nā Kāpena: Hoʻohana ʻia ʻo HEC i nā pena wai a me nā uhi e hoʻomalu i ka rheology a hoʻomaikaʻi i nā waiwai noi. Hana ia ma ke ʻano he mānoanoa, pale i ka sagging a hāʻawi i nā hiʻohiʻona pae maikaʻi. Hāʻawi pū ʻo HEC i ka paʻa a me ke ola o ka paʻa ʻana o nā mea pena, e hōʻoia i ka hāʻawi like ʻana o nā puaʻa a me nā mea hoʻohui.
5. Nā Mea Hana Hana: Ma ka ʻoihana kūkulu, hoʻohana ʻia ʻo HEC i nā ʻano cementitious e like me nā tile adhesives, grouts, a me nā morta. Hoʻohana ia ma ke ʻano he rheology modifier, hoʻomaikaʻi i ka hana, sag resistance, a me ka paʻa wai. Hōʻike nā mea hoʻokumu i hoʻokumu ʻia HEC i ka ikaika paʻa i hoʻonui ʻia a hoʻemi ʻia ka hoʻohaʻahaʻa ʻana, e alakaʻi ana i nā mea hana paʻa a me ka nani.

Nā hana e hiki mai ana a me nā kuhikuhi noiʻi:

1. Nā Papahana Kiʻekiʻe: Ke hoʻomau nei nā hana noiʻi e hoʻomohala i nā ʻano hana hou e hoʻopili ana i ka HEC no ka hoʻomaikaʻi ʻana i ka hana a me ka hana. Hoʻopili kēia i ka hoʻomohala ʻana i nā hydrogels multifunctional, nā ʻenehana microencapsulation, a me nā mea hoʻoulu ʻia no ka hāʻawi ʻana i ka lāʻau lapaʻau i manaʻo ʻia a me nā noi hoʻokuʻu ʻia.
2. Nā noi biomedical: Me ka ulu nui o ka hoihoi i nā mea biocompatible a me nā mea biodegradable, hiki i ka HEC ke loaʻa nā noi ma nā kahua biomedical e like me ka ʻenekinia kiko, ho'ōla ʻeha, a me ka lawe ʻana i ka lāʻau. Ke hoʻomau nei ka noiʻi ʻana i nā hydrogels e pili ana i ka HEC no ka hana hou ʻana o ka ʻiʻo a me nā scaffolds no ka moʻomeheu cell, me nā hopena hoʻohiki.
3. ʻO Green Synthesis Methods: ʻO ka hoʻomohala ʻana i nā ʻano hana synthesis hoʻomau a me ka eco-friendly no HEC kahi wahi o ka noiʻi ikaika. Hoʻohana ʻia nā loina kemika ʻōmaʻomaʻo e hōʻemi i ka hopena o ke kaiapuni o ka hana HEC ma o ka hoʻohana ʻana i nā meaʻai meaʻai hou, e hōʻemi ana i ka hana ʻōpala, a me ka hoʻomaikaʻi ʻana i nā kūlana hopena.
4. Nā Hoʻololi Hana: Ke ʻimi ʻia nei nā hoʻolālā e hoʻoponopono i nā waiwai o HEC ma o ka hoʻololi kemika a me ka copolymerization me nā polymers ʻē aʻe. Hoʻopili kēia i ka hoʻokomo ʻana i nā pūʻulu hana no nā pilina kikoʻī, e like me ka pane ʻana o ka pH, ka ʻike wela, a me ka bioactivity, e hoʻonui i ka laulā o nā noi kūpono.
5. Nā noi Nanotechnology: ʻO ka hoʻohui ʻana o HEC me nā nanomaterials a me nā nanoparticles paʻa i ka hoʻohiki no ka hoʻomohala ʻana i nā mea holomua me nā waiwai hou. Hōʻike nā nanocomposites, nā nanogels, a me nā nanofibers i hoʻokumu ʻia HEC no nā noi i ka hāʻawi ʻana i ka lāʻau lapaʻau, ka ʻenekinia kiko, ka ʻike, a me ka hoʻoponopono ʻana i ke kaiapuni.

Ka hopena:

Hydroxyethylcellulose(HEC) kū i waho ma ke ʻano he polymer versatile me kahi ākea o nā noi ma nā ʻoihana like ʻole. ʻO kāna hui kūikawā o ka wai-solubility, rheological properties, a me ka biocompatibility e lilo ia i mea waiwai nui i nā huahana mālama pilikino, nā lāʻau lapaʻau, nā meaʻai, nā pena, nā uhi, a me nā mea hana. Ke hoʻomau nei nā noiʻi noiʻi i ka hoʻonui ʻana i ka pono o HEC ma o ka hoʻomohala ʻana i nā hoʻomohala holomua, nā ʻano hana synthesis ʻōmaʻomaʻo, nā hoʻololi hana, a me ka hoʻohui ʻana me nā ʻenehana hou. No laila, ke hoʻomau nei ka HEC i ka hana koʻikoʻi i ka hoʻokele ʻana i ka hana hou a me ka hoʻokō ʻana i nā pono ulu o nā ʻoihana like ʻole i ka mākeke honua.