ʻO ka hydroxyethylcellulose he mea kūlohelohe a i ʻole synthetic?

Introduction to Hydroxyethylcellulose (HEC):

ʻO ka Hydroxyethylcellulose he mea ia o ka cellulose, he polysaccharide kūlohelohe i loaʻa i loko o nā paia o nā mea kanu. Hoʻokumu ʻia ka cellulose me nā ʻāpana glucose hou i hoʻopili pū ʻia e nā paʻa β-1,4 glycosidic. Loaʻa ka Hydroxyethylcellulose ma ka hoʻololi ʻana i ka cellulose ma o ka hoʻokomo ʻana i nā hui hydroxyethyl (-CH2CH2OH) ma kona iwi kuamoʻo.

Kaʻina hana:

Etherification o Cellulose: ʻO ka hana ʻana o HEC e pili ana i ka etherification o cellulose. Hoʻomaka maʻamau kēia kaʻina me ka cellulose i loaʻa mai ka pulp lāʻau a i ʻole nā ​​lints pulupulu.

Pane me ka Ethylene Oxide: Hoʻopili ʻia ka cellulose me ka ethylene oxide ma lalo o nā kūlana alkaline. Ke alakaʻi nei kēia hopena i ka hoʻololi ʻana o nā pūʻulu hydroxyl ma ka iwi kuamoʻo cellulose me nā hui hydroxyethyl, ka hopena i ka hydroxyethylcellulose.

Hoʻomaʻemaʻe: Hoʻomaʻemaʻe ʻia ka huahana e wehe i nā reagents a me nā huahana ʻaoʻao.

Nā waiwai o Hydroxyethylcellulose:

Solubility: Hiki ke hoʻoheheʻe ʻia ka HEC i loko o ka wai anuanu a me ka wai wela, e hoʻoheheʻe ʻia ana i nā ʻoluʻolu liʻiliʻi ma muli o ka ʻike.

Viscosity: Hōʻike ia i ke ʻano pseudoplastic, ʻo ia hoʻi, e emi ana kona viscosity me ka piʻi ʻana o ka shear rate. Hiki ke hoʻololi ʻia ka viscosity o nā hoʻonā HEC e nā ʻano like ʻole e like me ka neʻe ʻana a me ka pae o ka hoʻololi.

Nā Pono Hana Kiʻiʻoniʻoni: Hiki i ka HEC ke hana i nā kiʻiʻoniʻoni maʻalahi a hui pū ʻia, e hoʻohana pono ai i nā noi like ʻole kahi e pono ai ke kūkulu ʻana i ke kiʻiʻoniʻoni.

Thickening Agent: ʻO kekahi o ka hoʻohana mua ʻana o HEC ma ke ʻano he mea mānoanoa i nā ʻano hana like ʻole, e like me nā mea hoʻonaninani, nā lāʻau lapaʻau, a me nā huahana mālama pilikino.

Nā noi no ka Hydroxyethylcellulose:

Mea hoʻomaʻamaʻa a me nā huahana mālama pilikino: Hoʻohana nui ʻia ʻo HEC i nā mea hoʻonaninani a me nā huahana mālama pilikino ma ke ʻano he mānoanoa, stabilizer, a me nā mea hana kiʻiʻoniʻoni i nā huahana e like me nā lotions, creams, shampoos, a me ka niho niho.

ʻO nā lāʻau lapaʻau: I loko o nā mea hana lāʻau lapaʻau, lawelawe ʻo HEC ma ke ʻano he mea hoʻopaneʻe, binder, a me ka matrix hoʻokuʻu hoʻokuʻu ʻia i loko o nā uhi papa a me nā hoʻopuka waha.

Nā Pena a me nā Kāpena: Hoʻohana ʻia ʻo HEC i nā pena wai a me nā uhi e like me ka mānoanoa a me ka rheology modifier e hoʻomalu i ka viscosity a hoʻomaikaʻi i nā waiwai noi.

ʻOihana Meaʻai: I ka ʻoihana meaʻai, hoʻohana ʻia ʻo HEC ma ke ʻano he mānoanoa a me ka hoʻopaʻa ʻana i nā huahana e like me nā kīʻaha, nā lole, a me nā huahana waiū.

Kūkākūkā Kūlohelohe a i ʻole Synthetic Classification:

Hoʻopaʻapaʻa ʻia ka hoʻokaʻawale ʻana o ka hydroxyethylcellulose ma ke ʻano kūlohelohe a i ʻole synthetic. Eia nā hoʻopaʻapaʻa mai nā manaʻo ʻelua:

Nā hoʻopaʻapaʻa no ka hoʻokaʻawale ʻana ma ke ʻano he Synthetic:

Hoʻololi Kemika: Loaʻa ka HEC mai ka cellulose ma o ke kaʻina hana hoʻololi kemika e pili ana i ka hopena o ka cellulose me ka ethylene oxide. ʻO kēia hoʻololi kemika i manaʻo ʻia he synthetic ma ke ʻano.

Hana Hana Hana: Hana mua ʻia ʻo HEC ma o nā kaʻina hana ʻoihana e pili ana i nā hopena i hoʻomalu ʻia a me nā ʻanuʻu hoʻomaʻemaʻe, ʻo ia ka mea maʻamau o ka hana pūhui synthetic.

Hoʻololi Degree: Hiki ke hoʻomalu pono ʻia ke degere o ka hoʻololi ʻana i ka HEC i ka wā synthesis, e hōʻike ana i kahi kumu synthetic.

Nā hoʻopaʻapaʻa no ka hoʻokaʻawale ʻana ma ke ʻano kūlohelohe:

Loaʻa mai ka Cellulose: Loaʻa ka HEC mai ka cellulose, kahi polymer maoli i loaʻa nui i nā mea kanu.

Punawai Hoʻohou: ʻO Cellulose, ka mea hoʻomaka no ka hana HEC, loaʻa mai nā kumuwaiwai hou e like me ka pulp lāʻau a me ka pulupulu.

Biodegradability: E like me ka cellulose, hiki ke hoʻoheheʻe ʻia ka HEC, e wāwahi ana i nā huahana ʻino ʻole i ke kaiapuni i ka manawa.

Hana like me Cellulose: ʻOiai ke hoʻololi kemika, mālama ʻo HEC i nā waiwai he nui o cellulose, e like me ka solubility i ka wai a me ka biocompatibility.

ʻO ka hydroxyethylcellulose he polymer maʻamau i loaʻa mai ka cellulose ma o ke kaʻina hana hoʻololi kemika. ʻOiai ʻo kāna hana ʻana e pili ana i nā hopena synthetic a me nā kaʻina hana ʻoihana, loaʻa ka hopena mai kahi kumu kūlohelohe a hiki ke hoʻololi ʻia. ʻO ka hoʻopaʻapaʻa e pili ana inā pono e hoʻokaʻawale ʻia ʻo HEC ma ke ʻano kūlohelohe a i ʻole synthetic e hōʻike ana i ka paʻakikī o ka wehewehe ʻana i kēia mau huaʻōlelo i ka pōʻaiapili o nā polymers kūlohelohe i hoʻololi ʻia. Eia nō naʻe, ʻo kona biodegradability, renewable sourcing, a me nā hana like me cellulose e hōʻike ana he mau hiʻohiʻona o nā pūhui kūlohelohe a me ka synthetic, e hoʻopiʻi ana i nā palena ma waena o nā papa ʻelua.